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GMC Data Report No. 178
Preliminary results of 25 Apatite fission track analyses of samples from the following five wells on the North Slope of Alaska: Husky Oil NPR Operations Inc. Lisburne TeSt Well No. 1, core (2080'-13605'); Husky Oil NPR Operations Inc. Seabee Test Well No. 1, core (3000'-13,220'); Exxon Corporation Alaska State C-i, cuttings (2200'-13600'); Standard Alaska Production Co. Prudhoe Bay Unit J-l, cuttings (3500'-11420'); and BP Alaska Inc. Kemik Unit No. 2, cuttings (6100'-8000'). Received 30 November 1990 Total of 35 pages in report Alaska Geologic Materials Center Data Report No. 178 t'rellmmary Results of 25 Apatite Fission Track Analyses of Samples From Five Wells on the North Slope of Alaska. Husky Lisburne Test Well #1 Husky Seabee Test Well 01 Exxon Alaska State C-1 Prudhoe Bay Unit J-1 B.P. Kemik 02 Public Data File by Paul B.O'Sullivan Department of Geology La Trobe University Bundoora, Victoria 3083 Australia November, 1990 GMC Data Report No. 178 Page 1/35 CONTENTS Contents and Well Location Data Introduction List of Samples Sample Information Track Length Data Grain-Age Data From Lisbume Test Well #1 (5 samples) Lisburne Test Well #1 Length Distributions Grain-Age Data From SeabeeTest Well #1 (7 samples) SeabeeTest Well #1 Length Distributions Grain-Age Data From Alaska State C-1 (5 samples) Alaska State C-1 Length Distributions Grain-Age Data From Pmdhoe Bay J-1 (5 samples) Prudhoe Bay J-1 Length Distributions Grain-Age Data From Kemik #2 (3 samples) Kemik Length Distributions WELL LOCATION DATA Lisbume Test Well #1 - Seabee Test Well #1 - Alaska State C-1 - Prudhoe Bay Unit J- 1 Kemik #2- Sec. 17, T 11S,R 16 W (UM) Sec. 5, T 1S,R 1W (UM) Sec. 14, T 9 S, R 23 E (UM) Sec. 6, T 1S, R21E(UM) Pa~e -- 2 3 4 5 5 6 11 12 19 20 25 26 31 32 35 68030. N/155°45 W 69026. N/152°5 W 69°20' N/147°20 W GMC Data Report No. 178 Page 2/35 3 INTRODUCTION This is a preliminary report of apatite fission track analysis data of samples from five wells drilled on the North Slope of Alaska. During May 1989, sandstone, siltstone, and conglomerate samples were collected from drill-core and cuttings located at 'the State of Alaska's Geologic Materials Center in Eagle River. Apatite grains were separated from the collected samples and analyz~ in Melbourne Australia at the La Trobe University Fission Track Reseamh Laboratory. Separations, grain-mounts, and all analyses were completed by the author. For the pm'pose of this report, fission track ages were determined using 20-25 individual grain ages (ff possible) from each sample and as many confined track length measurements up to ~100. Though typical yields for the samples were very poor, in most cases >20 dateable grains were found on each mount. Due to relatively young ages and low uranium content, only 3 mounts contained 100 or more cOnfined tracks and an additional 2 mounts had between 50 and 100 tracks. Ten mounts had less than 10 confined tracks. A few samples yielded grains representing multiple populations so the mean age is presented (shown by a · in table). For those which it was determined that the dated grains could, represent a single population, the pooled age is presented. Each analysis includes two parts: 1) age report; and 2) track length distributions: The age report shows a listing of the individUal grain ages, the resulting age and pertinent information used in determining the age. A guide to read the information is as follows: POS 22A-Tucktu Fro. -Sample number and unit collected Irradiation: -In-house number for grouping samples from the same irradiation package Cryst~ -Number of each grain counted NS -Number of spontaneous tracks counted NI -Number of induced tracks counted NA -Number of area units counJed in grain Ratio 'Ratio of(NS/ND for each grain U(ppm) -Uranium conccntradon of each grain RHOs -Density of spontaneous tracks, (per cm2) RHOi -Density of induced tracks (per cm2) ET. Age(Ma) -Individual grain ages CHI Squared -Statistical test for determining multiple grain populations p(chi squared) -probability of less than 5% indicates multiple grain populations Variance of SQR -Statistical comparison of values of NS or NI for all grains NS/lqI -Pooled ratio of (NS/IN'I). Uses total number of spontaneous and induced tracks counted for whole sample. Value used in age calculation ff sample is of a single population Mcan Rofio : -Average ratio of (NS/ND for grains Pooled Age -Age calculated using NS/NI(single population) Mean Age -Age calculated Using "Mean Ratio" (multiple populations) The track length distributions for each sample are histograms showing the relative numbers of tracks measured at a particular length, the mean length of the tracks measured, the standard deviation of the tracks measured, and the total number of tracks measured for the sample (N). GMC Data Rep0cZ :I0. 178 Page 3/35 LIST OF SAMPLES (by depth) Lisburne #1 Sample # 89 POS 0lA 89 POS 0ZA 89 POS 03A 89 POS 04A 89 POS 05A 89 POS 06A Unit Shublik Fm. Pebble Shale Pebble Shale Pebble Shale Pebble Shale Ft. Mtn. Fro. D~pZ (et) 13,605 11,164 8,734 6,220 3,902 2,080 Resul~ (data) Age Ohly Not Dateable Age Only Age and Length Age and Length Age and Length Seabee #1 Sample # 89 POS 07A 89 POS 08A 89 POS 09A 89 POS 10A 89 POS 1 lA 89 POS 1ZA 89 POS 13A Unit Kingak Shale Ft. Mtn. Fro. Ft. Mtn. Fro. Ft. Mtn. Fro. Torok Fro. Torok Fro. Nanushuk Gp. Depth fit) 13,220 12,020 10,875 10,065 6,545 5,397 3,000 Results (data) Age and Length Age and Length Age and Length Age and Length Age and Length Age and Length Age and Length Alaska State C-1 Sample# '89 POS' i4A 89 POS 15A 89 POS 16A 89 POS 17A 89 POS 1SA 89 POS 19A Unit Thompson SS. Thompson SS. Canning Fm. Canning Fm. Sagavanirktok Fro. Sagavanirktok Fm. Depth (ft) 13,600 13,000 11,450 9,100 5,900 2,200 Results (dam) Age Only Age and Length Age and Length Age and Length Not Dateable Age and Length Prudhoe Bay J-1 Sample # 89 P~S 20A 89 POS 2lA 89 POS 22A 89 POS 23A 89 POS 24A 89 POS 25A Unit Kekiktuk Cong. Itldlyariak Frm Ivishak Fm. Shublik Fro. Colville Gp. Colville Gp. Depth fit) 11,420 11,280 9,100 8,520 6,290 3,500 Results (dam) Age Only Combined w/20A Age and Length Age Only Age and Length Age and Length Kemik g2 S ,ample # 8P POS 26A 89 POS 27A 89 POS 28A Unit Echooka Fm. Ivishak Fm. Shublik Fm. Depth fit) 8,000 7,000 6,100 Results (data) Age Only Age Only Age and Length GMC Data Report No. 178 Page 4/35 SAMPLE INFORMATION Sample 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS 89 POS No. Unit 0lA Shublik Fm. 03A Pebble Shale 04A Pebble Shale 0SA Pebble Shale 06A Ft. Mtn. Fm. 07A Kingnk Shale 0SA Ft. Mm. Fro. 09A Ft. Mtn. Fro. 10A Ft. Mtn. Fro. 1lA Torok Fro. 12A Torok Fm. 13A Nanushuk Gp. 14A Thompson SS. 15A Thompson SS. 16A Canning Fro. 17A Canning Fro. 19A Sagavanirktok 20+21A Kekiktuk 22A Ivishak Fm. 23A Shublik Fm. 24A Colville Gp. 25A Colville Gp. 26A Echooka Fm. 27A Ivishak Fm. 28A Shublik Fm. Lengths (#) Mean Len. (gm) Grains (#) Age (Ma + 1~) 0 - 6 20.5 4- 15.2 0 - 10 16.1 4- 5.9 4 10.67 8 36.8 4. 10.7 67 13.01 26 65.6 4. 6.1 13 14.22 20 92.1 4. 10.3 15 9.63 25 15.6 4. 3.9* 7 10.14 25 6.1 4- 2.0 8 9.68 25 22.2 + 4.3 40 10.38 26 26.7 4. 2.9 31 12.72 25 37.5 4. 5.8 53 11.51 25 50.1 + 5.9 102 12.14 25 102.3 + 8.7* 0 - 14 11.2 4- 5.2 26 8.79 26 53.4 + 5.1 41 9.93 25 82.6 + 16.7' 21 12.27 20 100.3 4. 20.4* 31 12.14 12 81.0 + 24.1' 2 11.83 11 80.2 + '21.2' 43 10.29 25 43.8 4. 10.1' 0 - 4 81.9 + 38.8* 103 11.87 .'" .'-=_ 25 131.2 + 6.9 104 12.83 25 94.6 4- 6.7 1 7.89 5 13.1 4- 5.5 2 7.73 16 16,6 4- 4.3 21 12.04 25 22.8 4. 5.7 TRACK LENGTH DATA Sample Number i Track Length Range (J~n) <5 5-6 6-7 7-8 8-9 9-10 10-11 11-12 12-13 13-14 14-15 15-16 16-17 >17 0lA 03A 04A 05A 06A 07A 08A 09A 10A llA 12A 13A 14A 15A 16A 17A 19A 20+21A 22A 23 A 24A 25A 26A 27A 28A 1 0 0 0 0 0 0 2 0 0 1 0 0 0 0 0 0 0 3 9 14 9 17 8 5 1 0 0 0 0 0 0 0 0 1 4 5 3 0 0 0 0 2 3 2 5 3 0 0 0 0 0 0 0 0 0 1 2 2 2 0 0 0 0 0 1 0 1 0 1 0 1 2 2 0 0 0 0 1 0 1 6 5 4 4 8 6 3 2 0 0 0 0 0 0 1 2 4 4 4 5 9 2 0 2 2 1 1 2 1 6 8 12 12 6 0 0 1 2 2 1 3 7 6 15 22 26 14 2 1 2 0 5 3 5 2 4 1 4 0 0 0 0 0 0 3 2 9 11 3 6 5 2 0 0 0 0 1 0 1 1 3 1 2 2 2 5 3 0 0 0 0 0 5 4 2 2 4 5 4 4 1 0 0 0 0 0 0 1 0 0 1 0 0 0 3 I 2 0 1 7 12 8 7 1 1 0 0 0 0 0 4 3 4 15 28 25 15 7 2 0 0 0 2 0 1 5 7 16 20 22 23 7 1 0 0 0 ! 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 0 0 0 0 0 1 1 0 0 3 1 3 4 2 3 2 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -- 0 0 0 0 0 6 GRAIN-AGE DATA FROM HUSKY LISBURNE TEST WELL #1 89 POS 01A APA'ITI'E 13,605' - SHUBLIK FM. - LISBURNE #1 IRRADIATION LU059 SLIDE NUMBER 1 COUNTED BY: POS No. Ns Ni Na I 1 3 12 2 0 7 9 3 0 4 6 4 1 4 6 5 0 2 2 6 0 1 4 2 21 RATIO U (opm) 0.333 3.0 0.000 9.2 0.000 7.9 0.250 7.9 0.000 11.9 0.000 3.0 6.4 RHOs' 9.259E+04 0.000E+00 0.000E+00 1.852E+05 0.000E+00 0.000E+00 5.698E+04 RHOi 2.778E+05 8.642E+05 7.407E+05 7.407E+05 1.1lIE+06 2.778E+05 5.983E+05 F.T. AGE ~) 71.6~ 82.7 0.0 ± 0.0 0.0 ± 0.0 53.8 ± 60.1 0.0 ± 0.0 0.0 ± 0.0 Area of basic unit = .0000009 cm-2 Chi Squared = 3.477 with 5 degrees of freedom P(chi squared) = 62.7 % Correlation Coefficiemt = 0.000 Variance of SQR(Ns) = 0.27 Vadance of SQR(Ni) = 0.32 Ns/Ni = 0.095 ± 0.070 Mcan Ratio = 0.095 ± 0.070 Ages calculated using a zeta of 352.7 _-2- 5 for SRM612 glass Rho D = 1.225E+06cm-2; ND = 2756 POOLED AGE = 20.5 4- 15.2 Ma MEAN AGE = 21.0 4- 13.5 Ma GMC Data Report No. 178 Page 6/35 89 POS 03A APATrrE 8,734'- PEBBLE SHALE - LISBURNE #1 IRRADIATION LU059 SLIDE NUMBER 2 COUNTED BY: POS No. Ns Ni bin RATIO U (opm) RHOs I I 6 15 0.167 4.8 7.407E+04 2 0 8 24 0.000 4.0 0.000E+O0 3 I 17 30 0.059 6.7 3.704E+04 4 0 6 10 0.000 7.1 0.000E+00 5 2 16 18 0.125 10.6 1.235E+05 6 0 5 10 0.000 5.9 0.000E+00 ? 0 11 24 0.000 5.4 0.000E+00 8 I 7 6 0.143 13.9 1.852E+05 9 I 12 20 0.083 7.1 5.556E+04 10 2 19 30 0.105 7.5 7.407E+04 RHOi 4.~, ~.~.E+05 3.704E+05 6.296E+05 6.667E+05 9.877E+05 5.556E+05 5.093E+05 1.296E+06 6.667E+05 7.037E+05 F.T. AGE 0~n]) 35.9 ± 38.8 0.0 ± 0.0 12.7 ± 13.1 0.0 ± 0.0 26.9 ± 20.2 0.0 ± 0.0 0.0 ± 0.0 30.8 ± 32.9 18.0 ± 18.7 22.7 ± 16;9 8 107 6.8 4.753E+04 basic unit.= .0000009 cra-2 Chi Squaw. d = 3.963 with 9 degrees of freedom P(chi squared) = 91.4 % Correlation Coefficient -- 0.726 Variance of SQR(Ns) = 0.37 Variance of SQR0q]) -- 0.60 Ns/Ni = 0.075 ± 0.027 Mean Ratio = 0.075 ± 0.027 Agez calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.225E+06cm-2; ND = 2756 POOLED AGE = 16.1 + 5.9 Ma MEAN AGE = 14.7 ± 4.5 Ma 6.358E+05 7 GMC Data Report No. 178 Page 7/35 89 POS 04A APATITE 6,220' - PEBBLE SHALE - LISBURNE #1 IRRADIATION LU059 SLIDE NUMBER 3 COUNTED BY: POS 1 I 3 2 I 21 3 0 5 4 5 34 5 3 9 6 0 4 7 I 2 8 3 4 14 82 Na 12 5O 16 16 15 9 4 9 . ,RATIO U'(l~m~ 0.333 3.0 0.048 5.0 0.000 3.7 0.147 25~2 0.333 7.1 0.000 5.3 0.500 5.9 0.750 5.3 7.4 RHOs 9.259E+04 2.222E+04 0.000E+00 3.47211+05 2.222E+05 0.000E+00 2.778E+05 3.704E+05 1.187E+05 Area of basic unit -- .0000009 cra-2 Chi Squared -- 10.146 with 7 dcgree~ of freedom P(chi squared) -- 18.0 % Correlation Coefficient -- 0.655 Variance of SQR(Ns) --- 0.65 Vadance of $QR(Ni) - 2.43 Ns/Ni = 0.171 + 0.049 Mean Ratio = 0.177 + 0.056 Ages calculated using a zeta of 352.7 + 5 for SRM612 glass Rho D = 1.225E+06cm-2; ND = 2756 POOLED AGE = 36.8 _+ 10.7 Ma MEAN AGE = 56.8 + 20.4 Ma RHOi 2.778E+05 4.66711+05 3.472E+05 2.361E+06 6.667E+05 4.938E+05 5.556E+05 4.938E+05 6.955E+05 F.T., AGE 71.6 4. 82.7 10.3 4- 10.5 0.0 + 0.0 31.7 4. 15.2 71.6 4. 47.8 0.0 4. 0.0 107.1 4. 131.2 160.0 4- 122.3 GMC Data Report No. 178 Page 8/35 89 POS 0SA APATITE 3,902' - PEBBLE SHALE - LISBURNE #1 IRRADIATION LU059 SLIDE NUMBER 4 COUNTED BY: POS No. Ns, Ni 1~ ' .,,RATIO U (l~.m,,) RHOs 1 I 2 35 0.500 0.7 3.175E+04 2 12 18 28 0.667 7.6 4.762E+05 3 7 31 15 0.226 24.6 5.185E+05 4 I 16 12 0.062 15.8 9.259E+04 5 2 6 10 0.333 7.1 2.222E+05 6 4 8 16 0.500 5.9 2.778E+05 7 8 18 36 0.4~4 5.9 2.469E+05 8 I I 16 1.000 0.7 6.944E+04 9 3 10 6 0.300 19.8 5.556E+05 10 4 17 25 0.235 8.1 1.778E+05 11 4 16 28 0.250 6.8 1.587E+05 12 8 12 48 0.667 3.0 1.852E-+05 13 10 30 28 0.333 12.7 3.968E+05 14 14 21 10 0.667 25.0 1.556'E+06 15 10 63 18 0.159 41.6 6.173E+05 16 9 30 50 0.300 7.1 2.000E+05 17 3 16 20 0.188 9.5 1.667E+05 18 12 35 30 0.343 13.9 4.~. ~.~.E+05 19 2 9 20 0.222 5.3 1.111E+05 20 0 7 18 0.000 4.6 0.000E+00 21. - 2 10 24 0.200 5.0 9.259E+04 22 7 31 30 0.226 12.3 2.593E+05 23 9 39 54 0.231 8.6 1.852E+05 24 2 8 15 0.250 6.3 1.481E+05 25 9 34 36 0.265 11.2 2.778E+05 26 14 30 60 0.467 5.9 2.593E+05 RHOi 6.349E+04 7.143E+05 2.296E+06 1.481E+06 6.667E+05 5.556E+05 5.556E+05 6.944E+04 1.852E+06 7.556E+05 6.349E+05 2.778E+05 1.190E+06 Z333E+06 3.889E+06 6.667E+05 8.889E+05 1.296E+06 5.000E+05 4.321E+05 4.630E+05 1.148E+06 8.025E+05 5.926E+05 1.049E+06 5.556E+05 F.T~,AGE,,0Vla) , 107.1 4- 131.2 142.4 4- 53.2 48.6 4- 20.4 13.5 4- 13.9 71.6 4- 58.5 107.1 4- 65.6 95.3 4- 40.6 212.5 4- 300.5 64.5 4- 42.5 50.6 4- 28.2 53.8 + 30.1 142.44- 65.1 71.6 4- 26.2 142.4 4- 49.3 34.24- 11.7 64.5 + 24.6 40.4 4- 25.4 73.6 4- 24.7 47.8 ± 37.4 .0.0± 0.0 43.1 _.+ 33.4 48.6 + 20.4 49.7 + 18.4 53.8 + 42.5 56.9 + 2lA 100.0 _+ 32.5 158 518 8.9 2.552E+05 Area of basic unit = .0000009 cm-2 Chi Squared = 29.583 with 25 degrees of freedom P(ch~ squared)= 24.0 % Correlation Coe2~cient = 0.691 Variance of SQR(Ns) = 1.00 Variance of SQR(Ni) = 2.56 Ns/Hi -- 0.305 4- 0.028 Mean Ratio = 0.308:1:0.032 Ages calculated using a zeta of 352.7 4- 5 for SRM612 glass Rho D = 1.225E~m-2; ND = 2756 POOLED AGE = 65.6 4- 6.2 Ma MEAN AGE = 74.6:1: 9A Ma 8.366E+05 GMC Data Report No. 178 Page 9/35 10 89 POS 0~& APATrI~ 2,0~Y - FT. MTN. FM. - LISBURN~ #1 IRRADIATION LU0~9 SLIDE NUMBER 5 COUNTED BY: POS I 20 22 12 0.909 21.8 1.852E+06 2 3 4 32 0.750 1.5 1.042E+05 3 23 47 28 0.489 19.9 9.127E+05 4 0 3 12 0.000 3.0 0.000E+O0 5 8 9 12 0.889 8.9 7.407E+05 6 3 7 42 0.429 2.0 7.936E+04 7 6 20 42 0.300 5.7 1.587E+05 8 37 71 40 0.521 21.1 1.028E+06 9 3 14 8 0.214 20.8 4.167E+05 10 0 5 6 0.000 9.9 0.000E+00 11 2 12 8 0.167 17.8 2.778E+05 12 2 14 15 0.143 11.1 1.481E+05 13 I I 15 1.000 0.8 7.40TE+04 14 0 5 25 0.000 2.4 0.000E+O0 15 0 4 27 0.000 1.8 0.000E+00 16 2 4 25 0.500 1.9 8.889E+04 17 I 15 18 0.067 9.9 6.173E+04 18 2 5 4 0.400 14.9 5.556E+05 19 6 11 36 0.545 3.6 1.852E+05 20 0 4 24 0.000 2.0 0.000E+00 ' 119 ' "277 7.6' 3.068E+05 Area of basic unit = .(XXXXX)9 cra-2 Chi Squnred = 30.043 with 19 degrees of fieedom P(chi ~ = 5.1% Correlation Coefficieat = 0.939 Variance of SQR(Ns) = 2.87 Variance of SQR(Ni) = 3.23 Ns/Ni = 0.430 + 0.047 Mean Ratio = 0.363 + 0.064 Ages calculated using a zeta of 352.7 + 5 for SRM612 glass Rho D = 1.225E+06cm-2; ND = 2756 POOLED AGE = 92.1 :l: 10.3 Ma MEA~ AGE = 78.6 + 16.0 Ma RHOi 2.037E+06 1.389E+05 1.865E+06 2.778E+05 8.333E+05 1.852E+05 5.291E+05 1.972E+06 1.944E+06 9.259E+05 1.037E+06 7.407E+O4 2.222E+05 1.646E+05 1.778E+05 9.259E+05 1.389E+06 3.395E+05 1.852E+05 7.141E+05 F.T. AOE (Ma), . 193.5 + 59.9 160.0 + 1223 104.9 + 26.8 0.0_+ 0.0 189.2 + 92.1 91.9 + 63.5 64.5+ 30.1 111.6 + 22.8 46.1+ 29.4 0.0 + 0.0 35.9 + 27A 30.8 + 23.3 212.5 + 300.5 0.0 + 0.0 0.0 + 0.0 107.1 +_ 92.8 14.4 + 14.9 85.8 + 71.8 116.8+ 59.3 0.0 + 0.0 GMC Data Report No. 178 Page 10/35 LISBURNE TEST WELL #1 LENGTH DISTRIBUTIONS 89 POS M.L. = 10.67 S.D. = 4.22 =4 POS 0SA M.L. = 13.01 S.D. = 3.29 N=67 40 -89POS06A ~ Mt.. = 14.7.2 ~ S.D. = 0.96 ~ 30 N=13 10- 5 10 15 'n~c~ LSN(~TM GMC Data Report No. 178 Page 11/35 12 GRAIN-AGE DATA FROM HUSKY SEABEE TEST WELL #1 89 POS 07A APA'ITrE 13,220' - KINGAK SHALE - SEABEE #1 IRRADIATION LU059 SLIDE NUMBER 6 COUNTED BY: POS No. Ns Ni Na RATIO 'U (ppm) .. RHOs ' . ~ 0 7 24 0.000 3.S 0.000E+00 2 ~ 3~ 2~ O.O28 ~7.~4.~mE+04 3 3 27 20 0.111 16.01.667E+05 4 0 15 50 0.000 3.6 0.000E+00 5 3 8 15 0.375 6.3 2.222E+05 6 3 ~ 40 0.0'~ 34.~ 7 0 36 30 0.000 14.30.000E44}0 8 0 30 16 0.000 22.30.000E+00 9 I ~-9 36 0.034 9.6 3.0~+m ~0 0 21 20 0.000 ~Z~ 0.000~.+00 11 3 34 25 0.088 16.21.333E+05 ~2 0 18 27 0.000 7.9 0.000~+00 13 2 34 30 0.059 13.57.407E+04 14 2 28 24 0.071 13.99.259E+04 ~5 3 ~9 ~6 0.~03 ~.~ z083~.+05 16 1 21 18 0.048 13.96.173E+04 17 3 90 16 0.033 66.82.083E+05 18 16 195 24 0.082 96.57.407E+05 19 2 9 30 0.222 3.6 7.407E+04 :0 0 ~0 n0 0.000 5.9 0.000~+00 21 1 21 40 0.048 6.2 2.778E+04 :: 4 :~ 40 0ag0~.: ~3 ~ ~ ~S 0.09~ 8.7 7.407~+04 Z4 ~ ~ ~ 0.~03.3 a.~73~+04 25 0 13 40 0.000 3.9 0.000E+00 RHOi 3.24 IE+05 1.600E+06 1.500E+06 3.333E+05 5.926E+05 3.222E~ 1.333E+06 2.083E+06 8.951E+05 1.167E+06 1.511E+06 7.407E+05 1.259E+06 1.296E+06 2.014E+06 1.296E+06 6.250E+06 9.028E-ff~6 3.333E+05 5.556E+05 5.833E+05 5.833E+05 8.148E+05 3.086E+05 3.611E+05 F.T. AGE 0Via,) 0.0 ± 0.0 6.04- 6.1 24.0 4- 14.6 0.0 4- 0.0 80.5 ± 54.5 5.6 ± 3.3 0.0 ± 0.0 0.0 4- 0.0 7.4 ± 7.6 0.0 4- 0.0 19.0± 11.5 0.0 _. 0.0 12.7 + 9.2 15.4 + 11.3 22.3 ± 13.5 10.3 + 10.5 7.2 + 4.2 17.7 + 4.6 47.8 + 37.4 0.0 ± 0.0 10.3 ± 10.5 41.0 + 22.4 19.6 ± 20.5 43.1 + 47.2 0.0 4- 0.0 50 874 15.3 8.182E+04 Area of basic unit = .0000009 cm-2 Chi Squared = 38.529 with 24 degrees of freedom P(chi squared) = 3.1% Correlation Coefficient= 0.830 Variance of SQR(Ns) = 0.90 Variance of SQR(Ni) = 6.86 Ns/Ni = 0.057 ± 0.OO8 Mean Ratio = 0.057 :l: 0.010 Ages calculated ming a zero of 352.7 :!: 5 for SRM612 glass Rho D = 1.225E406cm-2; ND = 2756 POOLED AGE = 12.3 + 1.8 Ma MEAN AGE = 15.6 4- 3.9 Ma 1.430E+06 GMC Data Report No. 178 Page 12/35 89 POS 0SA APA'ITFE 12,020' - FT. M'I~. FM. - SEABF..E #1 IRRADXATION LU059 SLIDE NUMBER 7 COUN'rED BY: POS N~'. 'Ns Ni bin I 0 5 4 2 I 16 9 3 0 12 4 4 0 3 9 5 I 7 4 6 I 5 3 7 0 12 .... 9 8 0 15 6 9 0 6 6 10 0 3 4 11 0 4 4 12 0 6 8 13 0 2 4 14 0 3 2 15 0 21 12 16 0 I 4 17 0 5 6 18 2 27 . 18 19 2 25 6 20 0 6 12 21 I 45 15 22 0 15 8 23 I 68 16 24 1 5 6 25 0 4 10 10 321 ,RATIO U (l~ml)RHOs RHOi 0.000 14.9 0.000E+00 1.389E+06 0.062 21.1 1.235E+05 1.975E+06 0.000 35.6 0.000E+00 3.333E+06 0.000 4.0 0.000E+00 3.704E+05 0.143 20.8 2.778E+05 1.944E+06 0.200 19.8 3.704E+05 1.852E+06 0.000 15.8 0.000E+00 1.481E+06 0.000 29.7 0.000E+00 2.778E+06 0.000 11.9 0.000E+00 1.111E+06 0.000 8.9 0.000E+00 8.333E+05 0;000 11.9 0.000E+00 1.111E+06 0.000 8.9 0.000E+00 8.333E+05 0.000 5.9 0.000E+O0 5.556E+05 0.000 17.8 0.000E+00 1.667E406 0.000 20.8 0.000E+00 1.944E+06 0.000 3.0 0.000E+00 2.778E+05 0.000 9.9 0.000E+00 9.259E+05 0.074 17.8 1.235E+05 1.667E+06 0.080 49.5 3.704E+05 4.630E+06 0.000 5.9 0.000E4-00 5.556E+05 0.022 35.6 7.407E+04 3.333E+06 0.000 22.3 0.000E+00 2.083E+06 0.015 50.5 6.944E+04 4.722E44)6 0.200 9.9 1.852E+05 9.259E+05 0.000 4.8 0.000E400 4.444E+05 F.T. AGE (Ma) 0.0 ± 0.0 13.5 :l: 13.9 0.0 ± 0.0 0.0 ± 0.0 30.8 ± 32.9 43.1 5:47.2 0.0 5:0.0 0.0 5:0.0 0.05:0.0 0.0 5:0.0 0.0 5:0.0 0.0 5:0.0 0.0 + 0.0 .0.0 +_ 0.0 0.0 5:0.0 0.0 5:0.0 0.0 5:0.0 16.05:11.7 17.3 5:12.7 0.0 5:0.0 4.8 + 4.9 0.0 + 0.0 3.2 _ 3.2 43.1 5:47.2 0.0 ± 0.0 20.2 5.879E44M 1.887E+06 Area of basic unit = .~ cra-2 Chi Squared= 18.340with 24 degrees of freedom P(chi squared) = 78.6 % Correlation Coefficient = 0.512 Variance of SQRCNs) = 0.29 Variance of SQRCNi) = 2.98 Ns/Ni = 0.031 + 0.010 Mean Ratio = 0.031 5:0.010 Ages ealc-~t_~ using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.225E+06cm-2; ND = 2756 POOLED AGE = 6.7 ± 2.2 Ma MEAN AGE = 6.9_+ 2.7 Ma 13 GMC Data Report No. 178 Page 13/35 14 89 POS 09A APA'ITrE 10,875' - laT. MTN. FM. - SEABEE #1 IRRADIATION LU059 SLIDE NUMBER 8 COUNTED BY: POS No. Ns Ni, Na ,, RATIO U,,(ppm) RHOs I 3 17 20 0.176 10.1 1.667E+05 2 10 41 16 0.244 30.4 6.944E+05 3 0 4 6 0.000 7.9 0.000E+00 4 0 5 16 0.000 3.7 0.000E+00 5 3 12 9 0.250 15.8 3.704E+05 6 0 7 9 0.000 9.2 0.000E+00 7 0 12 24 0.000 5.9 0.000E+00 8 0 3 6 0.000 5.9 0.000E+00 9 1 I 32 1.000 0.4 3.472E+04 10 0 9 9 0.000 11.9 0.000E+00 11 1 14 15 0.071 11.1 7.407E+04 12 0 3 12 0.000 3.0 0.000E+00 13 0 4 28 0.000 1.7 0.000E+00 14 1 10 16 0.100 7.4 6.944E+04 15 8 50 32 0.160 18.6 2.778E+05 16 0 23 20 0.000 13.7 0.000E+00 17 0 4 12 0.000 4.0 0.000E+00 18 0 5 6 0.000 9.9 0.000E+00 19 1 4 . t6 0.250 3.0 6.944E+04 20 1 6 4 0.167 17.8 2.778E+05 .. 21 1 34 9 0.029 44.9 1.235E+05 22 0 8 16 0.000 5.9 0.000E+00 23 0 9 12 0.000 8.9 0.000E+00 24 0 1 4 0.000 3.0 0.000E+00 25 0 5 15 0.000 4.0 0.000E+00 RHOi 9.444E+05 2.847E+06 7.407E~ 3.472E.~5 1.481E+06 8.642E+05 5.556E+05 5.556E+05 3.472E+04 1.1lIE+06 1.037E+06 2.778E+05 1.587E+05 6.944E+05 1.736E+06 1.278E+06 3.704E+05 9.259E+05 2.778E+05 4.198E+06 5.556E+05 8.333E+05 2.778E+05 3.704E+05 38.0 :l: 23.8 52.5 :!: 18.5 0.0 4- 0.0 0.0 :l: 0.0 53.8 ± 34.7 0.0 + 0.0 0.0 _+ 0.0 0.0 + 0.0 212.5 + 300.5 0.0 ± 0.0 15.4 ± 16.0 0.0 + 0.0 0.0 + 0.0 21.6 + 22.6 34.5 + 13.2 0.0_+ 0.0 0.0 + 0.0 0.0 + 0.0 53.8 :!: 60.1 35.9 + 38.8 6.4 + 6.4 0.0 + 0.0 0.0 + 0.0 0.0 _+ 0.0 0.0 _+ 0.0 30 291 9.5 9.158E+04 Area of basic unit = .0000009 cra-2 Chi Sqtmral = 27.613 with 24 degrees of fmeAom P(chi squared) = 27.7 % Correlation Coe~cient = 0.809 Variance of SQR(Ns) -- 0.85 Variance of SQR(Ni) = 2.46 Ns/Ni = 0.103 ± 0.020 Mean Ratio = 0.086 _+ 0.023 Ages calculated using a zeta of 352.7 + 5 for SRM612 glass Rho D = 1.225E406cm-2; ND = 2756 POOLED AGE = 22.2 :!: 4.3 Ma MEANAGE = 21.1+ 9.0Ma 8.883E+05 GMC Data Report No. 178 Page 14/35 89 POS 10A APATITE 10,065' - Fr. MTN. FM. - SEABEE #1 IRRADIATION LU059 SLIDE NUMBER 9 COUNTED BY: POS No. Ns Ni Na I 3 44 6 2 8 40 12 3 4 26 6 4 0 8 9 5 18 93 15 6 2 9 4 7 0 2 16 8 5 18 14 9 7 29 9 10 I 7 15 11 0 3 12 12 5 57 12 13 2 27 9 14 I 12 9 15 I 23 9 16 I 7 8 17 0 3 12 18 1 3 30 19 2 73 15 20 0 24 28 21 23 187 20 22 6 52 12 23 0 1 16 24 5 29 9 25 1 6 16 26 5 34 6 101 817 RATIO U (ppm) 0.068 87.1 0.200 39.6 0.154 51.5 0.000 10.6 0.194 73.7 0.222 26.7 0.000 1.5 0.278 15.3 0.241 38.3 0.143 5.5 0.000 3.0 O.088 56.4 0.074 35.6 0.083 15.8 0.043 30.4 0.143 10.4 0.000 3.0 0.333 1.2 0.027 57.8 0.000 10.2 0.123 111.1 0.115 513 0.000 0.7 0.172 38.3 0.167 4.5 0.147 67.3 29.5 RHOs 5.556E+05 7.407E+05 7.407E+05 0.000E+00 1.333E+06 5.556E+05 0,000E+00 3.968E+05 8.642E+05 7.407E404 0.000E+00 4.630E+05 2.469E+05 1.235E+05 1.235E+05 1.389E+05 8.148E+06 3.704E+06 4.815E+06 9.877E+05 6.889E+06 2.500E+06 1.389E+05 1.429E+06 3.580E+06 5.185E+05 2.778E+05 5.278E+06 3.333E+06 1.481E+06 2.840E+06 ' 9.722E~5 F.T. AOE (Ma) 14.7 :!: 8.8 43.1 :l: 16.7 33.1 + 17.8 0.0 ± 0.0 41.7 ± 10.8 47.8 ± 37.4 0.0 ± 0.0 59.7 ± 30.2 51.9 ± 21.9 30.8 ± 32.9 0.0 ± 0.0 18.9 _+ 8.8 16.0± 11.7 18.0 + 18.7 9.4 + 9.6 30.8 + 32.9 0.000E+00 3.704E+04 1A81E+05 0.000E+00 1.278E+06 5.556E+05 0.000E+00 6.173E+05 6.944E+04 9.259E+05 3.411E+05 2.778E+05 1.111E+05 5.407E+06 9.524E+05 1.039E+07 4.815E+06 6.944E+04 3.580E+06 4.167E+05 6.296E+06 2.759E+06 0.0 _+ 0.0 71.6± 82.7 5.9+ 4.2 0.0 ± 0.0 · 26.5 ± 5.9 24.9 ± 10.7 0.0_+ 0.0 37.1 _+ 18.0 35.9 ± 38.8 31.7 ± 15.2 Area of basic unit = .0000009 cm-2 chi Squared = 26.028 with 25 degrees of freedom P(chi squared) = 40.6 % Correlation Coefficient = 0.894 Variance of SQR(Ns) = 1.59 Variance of SQR(Ni) = 8.62 Ns/Ni = 0.124 + 0.013 Mean Ratio = 0.123 + 0.016 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.225E+06cm-2; ND = 2756 POOLED AGE = 26.6 + 2.9 Ma MEAN AGE = 25.0 4- 4.0 Ma GMC Data Report No. 178 Page 15/35 16 89 POS I IA APATITE 6,545' - TOROK FM. - SEABEE #1 IRRADIATION LU059 SLIDE NIJMBER 10 COUNTED BY: POS ii iii I l~o. m ~i .la.. ~o u On, m} . to-dos 1 2 5 4 0.400 14.9 5.556E4~5 2 2 7 4 0.~ ~.8 5.5~5 4 3 18 ~ 0.167 8.9 1.3~E~5 6 2 8 21 0.~0 4.5 1.058E~5 7 2 9 4 0.222 ~.7 5.5~5 8 0 3 6 0.~ 5.9 0.~E~ 9.. 1 4 6 0.250 7.9 1.85~5 10 2 7 6 0.~6 13.9 3.7~E~5 11 4 16 6 0.250 31.7 7.4~5 12 2 ~ 9 0.~1 29.0 2.~9E~5 13 0 9 8 0.~ 13.4 0.~E~ 14 2 2 8 1.~ 3.0 2.778E~5 15 3 17 6 0.176 33.7 5.55~5 16 1 14 12 0.071 13.9 9.~9E~ 17 3 30 12 0.1~ 29.7 2.778E~5 18 11 42 6 0.262 83.2 2.03~ 19 0 3 9 0.~ 4.0 0.~E~ 20 0 5 6 0.~ 9.9 0.~E~ 21 1 5 6 0.~ 9.9 1.85~5 22 1 6 12 0.167 5.9 9.259E~ 23 5 38 18 0.132 ~.1 3.~~5 24 0 7 8 0.~ 10.4 0.~E~ 25 0 6 8 0.~ 8.9 0.~E~ 50 ~7 15.7 2.5~E~5 Area of basic unit = .0000009 cm-2 Chi Squared = 23.327 with 24 degrees of freedom P(chi squared) = 50.1% Correlation C. oefficient = 0.808 Variance of SQR(Ns) = 0.68 Variance of SQR(Ni) = 2.10 Ns/Ni = 0.174 + 0.027 Mean Ratio = 0.174 :i: 0.027 Ages cal¢olnt_~_ ttghlg a zeta of 352.7 :l: 5 for SRM612 glass Rho D = 1.225E+06cm-2; ND = 2756 POOLED AGE = 37~ + $.8 Ma MEAN AGE = 57.1 :l: 17.9 Ma RH0i F.T. AGE ~) 1.389E+06 85.8 :t: 71.8 1.944E+06 61.4 :l: 49.3 8.333E+05 71.6 + 82.7 8.333E+o5 35.9 + 2~.4 2.778E+05 418.2 + 512.3 2.500E+06 47.8 + 37.4 5.55~+05 0.0 · 0.0 7.407E+05 53.8 ± 60.1 1.296E+06 61.4 _+ 49.3 2.963E+06 53.8 + 30.1 2.71~+06 19.6 +_ 14.5 1.2~0~.+06 0.0 + 0.0 2.778E+05 212.5 _+ 212.5 3.148E+06 38.0 _+ 23.8 1.29~+06 15.4 + 16.0 2.778E+06 21.6 _+ 13.1 7.778E+06 56.3 _+ 19.1 3.704E+05 0.0 :t: 0.0 9.259~-+05 0.0 ± 0.0 9.~9~+05 43.1 _+ 47.2 5.55~+05 35.9 + 38.8 2.346E-+06 28.4 + 13.5 9.722E+05 0.0 :!:: 0.0 8.333E+05 0.0 d:: 0.0 1.470E+06 GMC Data Report No. 178 Page 16/35 89 POS 12A APATI~ 5,397' - TOROK FM. - SEABEE #1 IRRADIATION LU059 SLIDE NUIV~ER 11 COUNTED BY: POS No. Ns Ni Na RATIO U(ppm) RHOs RHOi F.T. AGE 0~ta) I 2 17 9 2 2 19 9 3 5 42 30 4 3 6 6 5 3 5 20 6 5 13 20 7 9 55 16 8 18 44 15 9 0 5 15 10 4 24 4 11 1 8 18 12 0 3 8 13 1 7 18 14 6 28 12 15 2 13 27 16 2 7 12 17 4 10 20 18 2 5 9 19 2 4 4 20 3 8 8 21 9 40 9 22 0 5 8 23 2 5 6 24 3 5 6 _25 3 13 9 91 391 0.118 22.4 2.469E+05 0.105 25.1 2.469E+05 0.119 16.6 1.852E+05 0.500 11.9 5.556E+05 0.600 3.0 1.66'/E+05 0.385 7.7 2.778E+05 0.164 40.8 6.250E+05 0.409 34,9 1.333E+06 0.000 4.0 0.000E+00 0.167 71.3 1.111E+0~ 0.125 5.3 6.173E+04 0.000 4,5 0.000E+00 0.143 4.6 6.173E+04 0.214 27.7 5,556E+05 0.154 5.7 8.230E+04 0.286 6.9 1.852E+05 0.400 5.9 2.222E+05 0.400 6.6 2.469E+05 0.500 11.9 5.556E+05 0.375 11.9 4.167E+05 0.225 52,8 1.1lIE+06 0.000 7.4 0.000E+00 0.4(X} 9,9 3.704E+05 0.600 9,9 5.556E+05 0.231 17.2 3.704E+05 14,6 3.180E+05 Area ofbnsic unit = .~ cm-2 2.099E+06 2.346E~ 1.556E+06 1.1lIE+06 2.778E+05 7.222E+05 3.819E+06 3.259E+06 3.704E+05 6.667E+06 4.938E+05 4.167E+05 4.321E+05 2.593E+06 5.350E+05 6.481E+05 5.556E+05 6.173E+05 I.IllE+06 1.111E+06 4.938E+06 6.944E+05 · 9.259E+05 9.259E+05 25.4 4- 19.0 22.7 4- 16.9 25.7 4- 12.2 107.1 + 75.8 128.3 ± 93.8 82.6 4- 43.5 35.3 4- 12.7 87.8 4- 24.6 0.0 _+ 0.0 35.9 _+ 19.4 26.9 _+ 28.6 0.0 ± 0.0 30.8 ± 32.9 445.1__. 20.8 '33.1 ± 25.2 61.4 + 49.3 85.8 4- 50.8 85.8 + 71.8 107.1 + 92.8 80.5 _+ 54.5 48.4 + 17.9 0.0 + 0.0 85.8 4- 71.8 128.3 + 93.8 49.74- 31.8 Chi Squared = 22.503 with 24 degrees of freedom P(chi squared) = 54.9 % Correlation Coefficient = 0.790 Variance of SQR(Ns) = 0.89 Variance of SQR(r~i) = 2.78 Ns/Ni = 0.233 + 0.027 Mean Ratio = 0.233 4- 0.029 Ages calculated using a zeta of 352.7 + 5 for SRM612 glass Rho D = 1.225E+06an-2; ND = 2756 POOLED AGE = S0.1 4- $.9 Ma MEAN AGE = 56.9 + 7.9 Ma 17 GMC Data Report No. 178 Page 17/35 18 89 POS 13A APATrrE 3,000' - NANUSHUK OP. - SEABEE #I IRRADIATION LU059 SLIDE NUMBER 12 COUNTED BY: POS No. Ns I 24 2 6 3 29 4 8 5 10 6 2 7 94 8 1 9 15 10 26 11 4 12 11 13 8 14 7 15 9 16 62 17 29 18 97 19 22 20 8 21 131 22 5 23 7 24 100 25 7 · ,, 722 Ni Na" RATIO U (l~vm} Ri-lOs 56 15 0.429 44.4 1.778E+06 17 24 0.353 s.4 ZWSE+05 72 IS 0.403 47.5 1.790~-+0~ 14 2.5 0.571 6.7 3.556E+05 23 20 0.435 13.7 5.556E+05 2 42 1.000 0.6 5.29m+04 221 36 0.425 72.9 2.901E+06 7 9' 0.143 9.2 1.235E+05 39 5o 0.3s5 9.3 3.333~.+05 64 12 0.40~ 63.4 2.407E+0~ 11 90 0.364 L5 4.93SE+04 21 28 0.524 S.9 4.365E+05 10 20 0.S00 5.9 4.~.~E+05 17 42 0.412 4.8 1.85ZE+05 27 40 0.333 8.0 2.500E+05 183 36 0.339 60.4 1.914E+06 60 24 0.483 29.7 1.343E+06 199 20 0.487 118.25.389E+06 26 28 0.846 11.0 8.730E+05 20 12 0.400 19.8 7.407E+05 157 25 0.834 74.6 5.822E+06 17 32 0.294 6.3 1.736E+05 15 9 0.467 19.8 8.64ZE+05 197 16 0.508 146.36.944E+06 24 40 0.292 7.1 1.944E+05 1499 ....... 25.0 " '1.i25E+06 Area of basic unit = .0000009 cm-2 Chi Squared = 42.706 with 24 dcgree~ of freedom ?(chi squared) = 1.~ % Correlation Coefficient = 0.934 Vnriance of SQR(Ns) = 8.73 Variance of SQR(Ni) = 16.20 Ns/Ni = 0.482 + 0.022 Mean Ratio = 0.466 + 0.033 Ages calc,bt_~ using a zeta of 352.7 4. 5 for SRM612 glass Rho D = 1.225E~-2; ND = 2756 POOLED AGE = 103.2 :l: 5.3 Ma MEAN AGE = 102.3 + 8.8 Ma F.T. AGE O~a) 91.9 + 22.5 75.8 4- 36.0 86.44- 19.1 122.3 + 54.3 93.2 + 35.4 212.5 + 212.5 91.2+ 11.4 30.8 ± 32.9 82.6 ± 25.2 87.2 +_ 20.4 78.1 ± 45.6 112.2 ± 41.8 170.5 ± 81.0 88.3 ± 39.7 71.6+ 27.6 72.8 + 10.8 103.6± 23.6 I04A ± 13.2 180.2± 52.4 85.8 + 36.0 177.8 + 21.5 63.2+ 32.2 100.0 _+ 45.8 108.7 +_ 13.6 62.7 _+ 27.0 GMC Data Report No. 178 Page 18/35 POS o?A' M.L. = 9.63 S.D. = 1.44 N= 15 GMC Data Report No. 178 SEABEE TEST WELL #1 LENGTH DISTRIBUTIONS rS9~S0SA ]M.L. = 10.14 [.S.D. = 1.13 -N--7 __ t 89 POS 09A M.L. =9.68 I,II ........... , 89 POS llA M.L. = 12.72 $.D. = 1.89 N=31 f89 POS 12A M.L. = 11.51 S.D. = 2.61 N= 53 F89 POS 13A !M.L = 12.14 20- o 10. 5 10 15 I TRACK LENGTH (gm) 19 20 GRAIN-AGE DATA FROM EXXON ALASKA STATE C-1 89 POS 14A APATITE 13,600' - THOMPSON SS. - ALASKA STATE C-I IRRADIATION LU059 SLIDE NUMBER 13 COUNTED BY: POS No. ,.Ns' ,Ni INn ' ,RATIO U (t~m) RHOs 1 0 5 8 0.000 7.4 0.000E+00 2 0 4 4 0.000 11.9 0.000E+00 3 0 12 12 0.000 11.9 0.000E+00 4 I 7 10 0.143 8.3 1.111E+05 5 0 4 6 0.000 7.9 0.000E+00 6 0 3 4 0.000 8.9 0.000E+00 7 2 14 18 0.143 9.2 1.235E+05 8 0 7 9 0.000 9.2 0.000E+00 9 0 3 4 0.000 8.9 0.000E+00 I0 0 4 6 0.000 7.9 0.000E+00 11 1 6 6 0.167 11.9 1.852E+05 12 0 7 12 0.000 6.9 0.000E+00 13 1 11 8 0.091 16.3 1.389E+05 14 0 9 12 0.000 8.9 0.000E+00 RHOi 6.944E+05 I.IIIE+06 1.111E+06 7.778E+05 7.407E+05 8.333E+05 8.642E+05 8.642E+05 8.333E+05 7.407E+05 I.IIIE+06 6.481E+05 1.528E+06 8.333E+05 F,.T AaE (Ma) 0.0 ± 0.0 0.0 ± 0.0 0.0 ± 0.0 30.8 ± 32.9 0.0 ± 0.0 0.0 + 0.0 30.8 + 23.3 0.0 ± 0.0 0.0 ± 0.0 0.0 ± 0.0 35.9 + 38.8 0.0 + 0.0 19.6 + 20.5 0.0 ± 0.0 5 96 9.6 4.669E+04 Area of basic unit = .0000009 cm-2 Chi Squared = 7.516 with 13 degrees of freedom P(chi squared) = 87.4 % Correlation Coefficient = 0.618 Variance of SQR(Ns) = 0.28 Variance of SQRLT~Ii) = 0.42 Ns/Ni = 0.052 + 0.024 Mean Ratio = 0.052 ± 0.024 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.225E+06cm-2; ND = 2756 POOLED AGE = 11.2 ± 5.2 Ma MEAN AGE = 8.4± 3.8 Ma 8.964E+05 GMC Data Report No. 178 Page 20/35 89 POS ISA APAT[TE 13,000'- THOMPSON SS. ALASKA STATE C-I IRRADIATION LU059 SLIDE NUMBER 14 COUNTED BY: POS I I 11 10 2 2 3 16 3 0 3 30 4 I 5 15 5 7 45 49 6 11 20 30 7 10 51 12 8 0 5 ' ' ..... 35 9 32 118 40 10 I 7 20 11 0 15 35 12 3 5 10 13 3 19 35 14 I 3 20 15 I 3 24 16 0 3 25 17 6 19 28 18 5 25 18 19 I 9 12 20 9 32 16 21 6 10 12 22 2 27 30 23 0 3 12 24 0 4 · 15 25 4 13 21 26 38 122 24 'RATIO 0.091 13.1 0.667 2.2 0.000 1.2 0.200 4.0 0.156 10.9 . 0.550 7.9 0.196 50.5 0.0(X} 1.7 0.271 35.1 0.143 4.2 0.000 5.1 0.600 5.9 0.158 6A 0.333 1.8 0.333 1.5 0.000 1.4 0.316 8.1 0.200 16.5 0.111 8.9 0.281 23.8 0.600 9.9 0.074 10.7. 0.000 3.0 0.000 3.2 0.308 7.4 · 0.311 60.4 I.IIIE+05 1.389E+05 0.000E+00 7.407E44M 1.587E+05 4.074E+05 9.259E+05 0.000E+00 8.889E+05 5.556E+04 0.000E+00 3.333E+05 9.524E+04 5.556E+04 4.630E+04 0.000E+00 2.381E+05 3.086E+05 9.259E+04 6.250E+05 5.556E+05 7.407E+04 0.000E+00 0.000E+00 2.116E+05 1.759E+06 RHOi 1.222E44~ 2.083E+05 1.111E+05 3.704E+05 1.020E+06 7.40'/E+05 4.722E+06 1.587E+05 3.278E+06 3.889E+05 4.76ZE+05 5.556E+05 6.032E+05 1.667E+05 1.389E+05 1.333E+05 7.540E+05 1.543E+06 8.333E+05 2.222E+06 9.259E+05 1.000E+06 2.778E+05 ' 2.963E+05 6.878E+05 5.648E+06 F.T. AGE 0da) 19.6 :!: 20.5 142.4 4- 130.1 0.0 ± 0.0 43.1 4- 47.2 33.5 4- 13.6 117.74- 44.3 42.2 4- 14.6 0.0 + 0.0 58.34- 11.7 30.8 ± 32.9 0.0 ± 0.0 128.3 + 93.8 34.0 + 21.2 71.6 _+ 82.7 71.6+ 82.7 0.0 +_ 0.0 67:9 + 31.8 43.1 _+ 21.1 24.0 ± 25.3 60.5 +_ 22.9 128.3 + 66.3 I6.0+_ 11.7 0.0 ± 0.0 0.0 ± 0.0- 66.1 _+ 37.8 66.9 ± 12.5 144 580 11.6 2.694E+05 1.085E+06 Area of basic unit = .0000009 cra-2 Chi Squared = 28.762 with 25 degrees offre~om P(chi squared) = 27A % Correlation Coefficient = 0.961 Variance of SQR(Ns) = 2.59 Variance of SQR(Ni) = 6.72 Ns/Hi = 0.248 + 0.023 Mean Ratio = 0.241 ± 0.026 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.225E~m-2; ND = 2756 POOLED AGE = 53.4 _+ 5.1 Ma MEAN AGE = 48.8 ± 8.6 Ma GMC Data Report No. 178 Page 21/35 i 22 89 POS 16A APATITE 11,450' - CANNING FM. - ALASKA STATE C-I IRRADIATION LU060 SLIDE I~ER 1 COUI~D BY: POS ,No.,, Ns Ni Na I 2 i2 2 7 89 42 3 1 2 9 4 34 107 18 5 4 9 25 6 I 13 6 7 2 1 12 8 I 6 30 9 3 8 14 10 I 2 9 11 4 34 24 12 2 6 12 13 4 10 24 14 13 34 42 15 2 3 28 16 2 6 25 17 0 4 28 18 0 17 16 19 2 13 20- 20 2 5 12 21 3 13 50 22 31 42 48 23 4 7 16 24 7 61 40 25 6 138 513 i ,i, PA'nO U(pom) P.I-IOs .... 0.,~X)0 S.0 1.85:m+05 0.079 25.3 1.852E-,~5 O.5OO 2.7 1.235E+05 0.318 71.0 2.099E+06 0.~~. 4.3 1.778E+05 0.077 25.9 1.852E+05 2.000 1.0 1.852E+05 0.167 2.4 3.704E+04 0.375 6.8 2.381E+05 0.500 2.7 1.235E+05 0.118 16.9 1.852E+05 0.333 6.0 1.852E+05 0.400 5.0 1.852E+05 0.382 9.7 3.439E+05 0.667 1.3 7.936E+04 0.333 2.9 8.889E+04 0.000 1.7 0.000E+00 0.000 12.7 0.000E+00 0.154 7.8 1.1lIE+05 0.400 5.0 1.852E+05 0.231 3.1 6.667E+04 0.738 10.5 7.176'E+05 0.571 5.2 2.778E+05 0.115 18.2 1.944E+05 0.375 12.7 ,4.~E ,.+05 10.6 2.657E+05 RHOi 4.630E+05 2.354E+06 2.469E+05 6.605E+06 4.000E+05 2.407E+06 9.259E+04 2.222E+05 6.349E+05 2.469E+05 1.574E+06 5.556E+05 4.630E+05 8.995E+05 1.190E+05 2.667E+05 1.587E+05 1.181E+06 7.22ZE+05 4.630E+05 2.889E+05 9.722E+05 4.861E+05 1.694E+06 1.185E+06 9.879E+05 Area of basic unit = .~ em-2 Chi Squared = 57.627 with 24 degrees of freedom P(chi squared) = 0.0% Correlation Coefficient = 0.722 Variance of SQR(Ns) = 1.89 Variance of SQR(Ni) = 6.11 Ns/Ni = 0.269 + 0.026 Mean Ratio = 0.281 5:0.046 Ages calc.l~_~ using a zeta of 352.7 5:5 for SRM612 glass Rho D = 1.218E+06em-2; ND = 2741 POOLED AGE = 57.5 5:5.7 Ma MEAN AGE = 82.6 5:16.7 Ma ^09 0v ) 85.4 5:71.4 16.9 5:6.6 106.5 + 130.5 67.9 + 13.5 94.8 4- 57.0 16.5 5:17.1 415.9 5:509.4 35.7 5:38.6 80.0 5:54.2 106.5 5:130.5 25.2 5:13.3 71.2+ 58.2 85.4 5:50.5 81.6 5:26.7 141.6 _+ 129.3 71.2 + 58.2 0.0 5:0.0 0.0 5:0.0 33.0 5:25.0 85.4 5:71.4 49.4 5:31.6 156.6 5:37.3 121.6 5:76.3 24.6 + 9.8 80.0 5:38.4 GMC Data Report No. 178 Page 22/35 23 89 POS 17A APATITE 9,100' - CANNINO FI~ - ALASKA STATE C-I IRRADIATION LUO60 SLIDE NUMBER 2 COUNTED BY: POS ~o. r~s Ni ' Na ~A'r[o U(pp~) ~-IOs I 6 15 15 0.~ IZ0 4.~E~5 2 4 8 16 0.~ 6.0 2.~8E~5 3 3 14 10 0.214 16.73.333E~5 4 2 12 12 0.167 12.01.85~5 ~ 0 ~ 18 0.~ 3.3 0.~E~ ~ 3 ~ ~ 0.7~0 8.0 ~.~~ 7 8 ~ ~ 0.~ 10.03.7~E~ 8 8 ~ 21 0.125 ~.4 4.233E~5 9 3 7 15 0.429 10 4 2 la 2.~ 1.5 2.778E~5 11 4 9 12 0.~ 9.0 3.7~E~5 12 4 7 15 0.571 5.6 2.~3E~5 13 7 82 ~ 0.085 49.03.889E~5 14 67 m 70 0.303 3Z7 ~.~3~ 15 15 21 18 0.714 13.99.259E~5 16 17 ~ 35 0.386 15.05.39~5 17 10 15 18 0.~710.06.173E~5 lS ~ S S 0.~ 7.~ ~.77SS~5 19 52 69 ~ 0.7~~.6 1.~E~ 20 7 71 30 0.~9~.3 2.593E~5 RHOi I.IIIE+06 5.556E+05 1.556E+06 I.II1E+06 3.086E~5 7.407E+05 9.259E+05 3.386E+06 5.185E+05 1.389E+05 8.333E+05 5.185F,+05 4.556F,+06 3.508E+06 1.296E+O6 1.397E+06 9.259E+05 6.944E+05 1.917E+06 2.630E+06 F.T. AGE 0Via) 85.4 4- 41.3 106.5 4- 65.3 45.9 4- 29,2 35.7 4- 27.3 0.0 4- 0.0 159.1 4- 121.6 85.4 + 35.8 26.8+ 10.1 91.4 + 63.1 415.9 4- 360.3 94.8 + 57~0 121.6 4. 76.3 18.3 + 7.2 64.8 + 9.2 151.6 + 51.4 82.5 + 23.6 141.6+ 57~9 85.4 4. 71.4 159.9 4. 29.6 21.1 4. 8.4 226 695 19.8 5.993E+05 1.843E+O6 Area of basic unit = .0000009 cra-2 Chi Squared = 74.470 with 19 degrees of freedom P(chi squm~ = o.o % Correlation Coefficient = 0.830 Variance of SQR(Ns) = 3.65 Variance ofSQR(Ni) = 11.15 Ns/Ni = 0.325 + 0.025 Mean Ratio = 0.362 4. 0.059 Ages calculate~ using a zeta of 352.7 + 5 for SRM612 glass RhoD= 1.218E+06cm-2; ND = 2741 POOLED AGE = 69.5 4- 5.6 Ma MEAN AGE = 100.3 4- 20.4 Ma GMC Data Report No. 178 Page 23/35 24 89 POS 19A APATITE 2,200' - SAGAVANIRKTOK FM. - .~tSKA STATE C-I IRRADIATION LU060 SLIDE NUMBER 4 COUNTED BY: POS . ' art6 , I 113 287 70 0.394 49.0 1.794E+06 2 14 41 9 0.341 54.4 1.728E+06 3 0 6 36 0.000 2.0 0.000E+00 4 I 2 9 0.500 2.7 1.235E+05 5 I1 19 4 0.579 56.8 3.056E+06 6 0 9 9 0.000 12.0 0.000E+00 7 0 4 4 0.000 12.0 0.000E+00 8 0 I 16 0.000 0.7 O.O00E+O0 9 4 4 4 1.000 12.0 1.111E+06 10 46 62 30 0.742 24.7 1.704E+06 11 I 1 9 1.000 1.3 1.235E+05 12 0 4 49 0.000 1.0 0.000E+00 RHoi 4.556E~ 5.062E+06 1.852E+05 2.469E+05 5.278E+06 I.II1E+06 I.IIIE+06 6.944E+04 1.111E+06 2.296E+06 1.235E+05 9.070E+04 F.T. (Ma) 84.0 ± 9.5 72.9 ± 22.6 0.0 ± 0.0 106.5 ± 130.5 123.2 ± 46.8 0.0 + 0.0 0.0 ± 0.0 0.0 + 0.0 211.3 ± 149.5 157.4+ 30.9 211.3 + 298.9 0.0 ± 0.0 190 440 21.1 8.478E+05 Area of basic unit = .~ cm-2 Chi Squared = 22.047 with 11 degrees of fxeedom P(chi squared) = 2.4 % Correlation Coefficient-- 0.980 Variance ofSQR(Ns) = 11.13 Variance of SQR(Ni) = 20.73 Ns/Ni = 0A32 ± 0.037 Mean Ratio = 0.401 ± 0.080 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.218E+06cm-2; ND = 2741 POOLED AGE = 92.1 + 8.3 Ma MEAN AGE = 81.0 ± 24.1 Ma 1.963E+06 GMC Data Report No. 178 Page 24/35 ALASKA 89 POS ISA M.L. = 8.79 S.D. = 2.64 .N=26 STATE C.I 89 POS 17A M.L. = 12.27 S.D. = 2.93 N=21 LENGTH DISTRIBUTIONS i89 POS 16A M.L. = 9.93 S.D. = 1.81 N=41 '89 POS 19A M.L. = 12.14 $.D. = 2.63 ,,. N=31 10 15 TI~CK ~6~H Cum) 25 GMC Data Report No. 178 Page 25/35 26 GRAIN-AGE DATA FROM B.P. PRUDHOE BAY UNIT J-I 89 POS 20A APA'ITTE 11,420' - KEKiICTUK CONG. - PRUDHOE BAY UNIT J-I IR~IATION LU060 SLIDE NUIVIBER 5 COUI~D BY: POS No. N.s ~i m RATIO U(om) P~, Os, 1 26 67 36 0.388 ~.2 8.~~5 2 ~ 2 9 0.~ Z7 1.23~ 3 0 9 12 0.~ 9.0 0.~E~ 4 ~ ~ ~ 0.76717.9 1.278E~ 5 0 7 15 0.~ 5.6 0.~E~ 6 9 11 8 0.81816.4 l.~E~ 7 2 12 10 0.16714.3 2.~~5 8 7 10 ~ 0.7~ 5.0 3.~1E~5 9 I 8 21 0.~ n.6 ~0 0 2 ~ 0.~ O.7 0.~~ 11 4 6 ~ 0.~7 3.6 2.2~E~5 RHOi 2.068E+06 2.469E+05 8.333E+05 1.667E+06 5.185E+05 1.528E44)6 1.333E+06 4.630E+O5 4.233E+05 6.173E+04 3.333E+05 l=.'r. AO~ 82.8:1:19.2 106.5 :!: 130.5 0.0 + 0.0 162.6 + 45.2 0.0 + 0.0 173.4 + 78.0 35.7 + 27.3 148.6 + 73.3 26.8 + 28.4 0.0 + 0.0 141.6 + 91.5 73 164 9.3 3.844E+05 Area of basic unit = .~ cm-2 Chi Squared = 18.895 with 10 degrees of freedom P(chi squared) = 4.2% .- Correlation Coefficient = 0.893 Variance of SQR(Ns) = 3.31 Variance of SQR(Ni) = 3.71 Ns/Ni = 0.445 + 0.063 Mean Ratio = 0.388 + 0.094 Ages calculated using a zeta of 352.7 + 5 for SRM612 glass Rho D = 1.218E+0dcm-2; ND = 2741 POOLED AGE = 94.9 + 13.5 Ma MEAN AGE = 80.2 + 21.3 Ma 8.636E+05 GMC Data Report No. 178 Page 26/35 27 .'.o 89 POS 22A APATITE 9,100' - IVlSttAK FM. - PRUDHOE BAY UNIT ~-1 IRRADIATION ~ SLIDE NUMBER 7 COUNTED BY: POS No.. r~s Ni m ~,T~O U(ppm) P~HOs 1 7 ~2 6 0.SS3 ~S 2 3 12 12 0.~ IZ0 2.~8E~ 3 0 10 9 0.~ 13.3 0.~E~ ~ ~ ~ ~ o.~3 ll.0 ~ ~ 2 S 9 0.~0 10.6 ~9E~5 6 6 llV 16 0.0~i 8V.4 4.~6~ S ~ ~3 l~ 0.0VV 10.4 V.~~ ~ 12 V~ ~ 0.~2 ~V.2 6.~~ ~0 3 ~ ~ 0.~ 22.~ ll 0 13 ~ 0.~ V.S 0.~E~ l: 0 S 12 0.~ ~.0 0.~~ 13 3 ~ 12 0.~ 14.~ 2.VVSS~ 14 3 9 1~ 0.333 7.2 2.222E~5 16 o s 6 o.~ l~.~ o.~E~ 17 8 21 20 0.381 12.5 4.~E~5 ~8 0 l~ 16 0.~ iL2 19 3 39 ~ 0.077 19.4 1.3~E~ 20 2 9 ~ 0.222 5.4 1.111E~5 21 3 20 9 0.1~0 ~.6 3.~E~5 22 ~l ~ ~ o.v~ 23,0 1.62~ 23 ~ 3~ 2~ 0.~3~ 2L1 2.~~ ~ S ~ ~ 0.SS~ n.0 ~.SV~ 2~ 3 11 18 0.273 7.3 1.8~2E~5 ~Rl-lOi 2.222E+06 1.111E+06 1.2.35E+06 1.022E+06 9.877E+05 8.125E+06 6.667E+05 9.630E+05 4.389E+06 2.130E+06 7.222E~5 4.630E+05 1.389E+06 6.667E+05 5.000E+05 1.451E+06 1.167E+06 1.042E+06 1,806E+06 5.000E+05 2.469E+06 2.143E+06 1.958E+06 1.1lIE+06 6.790E+05 F.T. AGE O~.a) 124.1 ± 59.1 53.5 ± 34.5 0.0 ± 0.0 9.3 ± 9.5 53.5 ± 42.3 11.0± 4.6 23.8± 25.1 16.5 ± 17.1 32.5± I0.1 14.0 ± 8.3 0.0 ± 0.0 0.0 ± 0.0 42.8± 27.1 71.2± 47.5 23.8__. 25.-1 0.0 ± 0.0 81.3 ± 33.8 0.0 ± 0.0. 16.5 ± 9.9 47.6 ± 37.2 32.1 ± 19.9 161.1 ± 33.6 29.0 ± 13.8 188.2 4- 91.5 58.3 ± 38.0 116 603 18.0 3.214E+05 Area of basic unit-- .0000009 cra-2 Chi Squared -- 106.127 with 24 degrees of free~m P(chi squared) = 0.0 % Correlation Coefficieat = 0.412 Variance of SQR(Ns) = 1.92 Variance of SQR(Ni) = 4.49 Ns/Ni = 0.192 _+ 0.020 Mean Ratio = 0.180 ± 0.038 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.218E+06cm-2; ND = 2741 POOLED AGE = 41.2 ± 4.3 Ma MEAN AGE -- 43.8 ± 10.1 Ma 1.671E406 GMC Data Report No. 178 page 27/35 28 89 POS 23A APATITE 8,520' - SHUBLIK FIVL - PRUDHOE BAY UNIT $-1 IRRADIATION LtRY~ SLIDE NUMBER 8 COUNTED BY: POS ,.No. Ns Ni I '7 ' 12 2 0 7 3 I 6 4 I1 14 Na RA~'IO' U,(ppm) RH ,Os, ,, ~2'' 0.583 12.0 6.481E+05 20 0.000 4.2 O.O00E-H)O 10 0.167 7.2 1.111E+05 24 0.786 7.0 5.093E+05 RHoi 1.1lIE+06 3.889E+05 6.667E+05 6.481E+05 F.T. AGE 0Via) 124.1 + 59.1 0.0 + 0.0 35.7 4- 38.6 166.6 + 67.2 19 39 7.1 3.199E+05 Area of basic unit = .0000009 cra-2 Chi Squared = 6.073 with 3 degrees of freedom P(chi squared) = 10.8 % Correlation Coefficient = 0.977 Variance of SQR(Ns) = 2.29 Variance of SQR(Ni) = 0.39 Ns/Ni = 0.487 4- 0.136 Mean Ratio = 0.422 _+ 0.159 Ages calculated using a zeta of 352.7 4- 5 for SRM612 glass Rho D = 1.218E+06cm-2; ND = 2741 POOLED AGE = 103.8 4- 29.1 Ma MEAN AGE = 81.9 + 38.8 Ma 6.566E+05 GMC Data Report No. 178 Page 28/35 89 POS 24A APATITE 6,290' - COLVlLLE GP. - PRUDHOE BAY UNIT J-I IRRADIATION LU060 SLIDE NUMBER 9 COUNTED BY: POS No. Ns Ni bin I 2 3 24 2 32 43 40 3 18 29 24 4 20 21 20 5 30 29 20 6 8 6 27 7 4 3 20 8 13 22 20 9 18 16 40 10 2 5 12 11 140 196 30 12 4 3 28 13 I 2 18 14 43 72 28 15 1 3 30 16 2 2 20 17 7 7 20 18 14 20 32 19 127 208 30 20 31 46 12 21 5 3 16 22 12 39 16 23 21 60 32 24 36 81 32 25 84 175 48 RATIO U {ppm) 0.667 1.5 0.744 12.8 0.621 14.4 0.952 12.5 1.034 17.3 1.333 2.7 1.333 1.8 0.591 13.1 1.125 4.8 0.400 5.0 0.714 78.1 1.333 1.3 0.500 1.3 0.597 30.7 0.333 1.2 1.000 1.2 1.000 4.2 0.700 7.5 0.611 82.9 0.674 45.8 1.667 2.2 0.308 29.1 0.350 22.4 0.444 30.2 0.48O 43.6 RHOs 9.~9E-~)4 8.889E+05 8333E+05 1.1lIE+06 1.667E+06 3.292E+05 2.222E+05 7.222E+05 5.000E+05 1.85ZE+05 5.185E+06 1.587E+05 6.173E44)4 1.706E+06 3.704E+04 1.111E+05 3.889E+05 4.861E+05 4.704E+06 2.870E+06 3.472E+05 8.333E+05 7.292E+05 1.250E+06 1.944E+06 RHOi F.T. AGE OVla) 1.389E+05 1.194E+06 1.343E+06 1.167E+06 1.611E+06 2.469E+05 1.667E+05 4.~E+05 4.630E+05 7.259E+06 1.190E+05 1.235E+05 2.857E+06 1.1lIE+05 1.111E+05 3.889E+05 6.944E+05 7~704E+06 "4.259E+06 2.083E+05 2.708E+06 2.083E+06 2.812E+06 4.051E+06 141.6 4- 1293 157.9 :t: 37.1 132.0 4- 39.7 201.4 ± 63.1 218.5 + 57.1 280.2 4- 151.5 280.2 4- 214.1 125.74- 44.1 237.24- 81.7 85.4 4- 71.4 151.6 _ 17.2 280.2 4- 214.1 106.5 4- 130.5 127.0 _+ 24.7 71.2 _4- 82;2 211.3 + 211.4 211.3 4- 113.1 148.6 4. 51.9 129.8 + 14.9 143.2 + 33.4 348.4 _+ 254.6 65.8 + 21.8 74.7 _+ 19.0 94.84. 19.1 102.3+ 13.8 675 1094 20.5 1.174E+06 1.902E+06 Area of basic unit = .~ cm-2 Chi Squared -- 35.887 with 24 degrees of freedom P(chi squared) = 5.6~ Correlation Coefficient= 0.972 Variance of SQR(Ns) = 8.75 Variance of SQR(Ni) = 15.74 Ns/NJ = 0.617 t 0.030 Mean Ratio = 0.635 4- 0.046 Ages calculated using a zeta of 352.7 4- 5 for SRM612 glass RhoD= 1.218E+06cm-2; ND = 2741 POOLED AGE = 131.2 4- 7.1 Ma MEAN AGE = 165.5 4- 16.0 Ma GMC Data Report No. 178 Page 29/35 3O 89 POS 2~A APA'ITrE 3,500' - COLVII i.i~. GP. - PRUDHOE BAY UNIT J-I IRRADIATION LU060 SLIDE ~JMBER 10 COUNTED BY: POS ,No.' Ns Ni' ,Na 1 8 27 20 2 5 11 24 3 19 60 15 4 70 184 16 5 102 140 40 6 6 10 50 7 11 34 18 8 2 13 16 9 17 23 20 10 44 120 18 11 8 18 25 12 50 154 25 13 8 24 32 14 25 35 18 15 5 18 24 16 25 61 40 17 2 4 16 18 11 27 24 19 27 86 56 20 32 47 10 21 8 16 12 22 5 10 9 23 10 22 20 24 18 43 24 25 5 11 30 523 1198 P. ATIO' U mos 0.296 16.1 4.444E+05 0.455 5.5 2.315E+05 0.317 47.8 1.407E+06 0.380 137.4 4.861E+06 0.729 41.8 2.833E+06 0.600 2.4 1.333E+05 0.324 22.6 6.790E+05 0.154 9.7 1.389E+05 0.739 13.7 9.444E+05 0.367 79.7 2.716E+06 0.444 8.6 3.556E+05 0.325 73.6 2.222E+06 0.333 9.0 2.778E+05 0.714 23.2 1.543E+06 0.278 9.0 2.315E+05 0.410 18.2 6.944E+05 0.500 3.0 1.389E+05 0.407 13.4 5.093E+05 0.314 18.4 5.357E+05 0.681 56.2 3.556E+06 0.500 15.9 7.407E+05 0.500 13.3 6.173E+05 0.455 13.1 5.556E+05 0.419 21.4 8.333E+05 0.455 4.4 1.852E+05 '23.8 '' 9.653E4~05 RHOi 1.500E+06 5.093E4-05 4.~.~.E4436 1.278E+07 3.889E+06 2.222E.~5 2.099E+06 9.028E+05 1.278E+06 7.407E+06 8.000E+05 6.844E+06 8.333E+05 2.160E+06 8.333E+05 1.694E+06 2.778E+05 1.250E+06 1.706E+06 5.222E+06 1.481E+06 1.991E+06 4.074E+05 '2.211E~' Area of basic unit = .0000009 cm-2 Chi Squared = 40.782 with 24 degrees of freedom P(chi squared) = 1.8 % Correlation Coefficient = 0.897 Variance of SQR(Ns) = 4.76 Variance ofSqR(Ni) = 10.09 Ns/Ni = 0.437 + 0.023 Mean Ratio = 0.432 5:0.033 Ages calc.la!ed using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.218E406cm-2; bid = 2741 POOLED AGE = 93.1 5: 5A Ma MEAN AGE = 94.6 5: 6.8 Ma 63.3 5:25.5 96.9 :l: 52.3 67.7 5:17.9 81.2+ 11.6 154.65:20.5 127.6+ 66.0 69.1_+ 24.0 33.0 :!: 25.0 156.8 ± 50.3 78.3_+ 13.9 94.8 + 40.3 69.4-+ 11.4 71.2 -+ 29.1 151.6 + 39.9 59.4 _+ 30.1 87.4 _+ 20.9 106.5 _+ 92.3 86.9 _+ 31.2 67.1 _+ 14.9 144.6 _+ 33.3 106.5 ± 46.2 106.5 ± 58.4 96.9 _+ 37.0 89.3 _+ 25.2 96.9 ± 52.3 GMC Data Report No. 178 Page 30/35 . 31 PRUDHOE BAY UNIT J-I LENGTH DISTRIBUTIONS POS 20,21A M.L. = 11.83 $.D. = 2.51 I=2 POS 22A M.L. = 10.29 S.D. = 2.37 N=43 POS 24A M.L. = 11.87 $.D. = 1.69 N= 103 40 -[ 89 POS 25A M.L. = 12.83 30 $.D. = 1.85 N= 104 10 I1~ ............... 5 10 15 TRACK LENGTH (j~m) I GMC Data Report No. 178 Page 31/35 32 GRAIN-AGE DATA FROM B.P. KEMIK 02 89 POS 26A APATITE 8,000' - ECHOOKA FM. - KEMIK #2 IRRADIATION LU060 SLIDE NUMBER 11 COUNTED BY: POS .No. Ns 'Ni I I 14 2 I 6 3 2 26 4 I 25 5 1 27 Na R,A, TIO" I~l (ppm) RHOs RHOi 12 0.071 13.9 9.259E+04 1.296E+06 8 0.167 9.0 1.389E+05 8.333E+05 9 0.077 34.5 2.469E+05 3.210E+06 30 0.040 10.0 3.704E+04 9.259E+05 6 0.037 53.8 1.852E+05 5.000E+06 F.T. AGE' ~1, ) 15.3 + 15.9 35.7 4- 38.6 16.5 4- 12.1 8.6 4- 8.8 8.0+ 8.1 6 98 18.0 1.026E+05 1.675E+06 Area of basic unit = .0000009 cm-2 Chi Squared = 1.479 with 4 degrees of freedom P(chisqmred) = 83.0 % Correlation Coefficient = 0.387 Variance of SQR(Ns) = 0.03 Variance of SQR(Ni) = 1.42 Ns/Ni = 0.061 + 0.026 Mean Ratio = 0.061 + 0.026 Ages calculated using a zeta of 352.7 4- 5 for SRM612 glass Rho D = l~218E+06cm-2; ND = 2741 POOLED AGE = 13.1 4- 5.5 Ma MEAN AGE = 16.8 4- 5.1 Ma GMC Data Report No. 178 Page 32/35 89 POS 27A APATITE 7,000' - WISHAK FM. - KEMIK #2 IRRADIATION LU060 SLIDE I~ER 12 COUNTED BY: POS No. Ns NJ. .1~ .....RATIO U (oum) RHOs I I 3 8 0.333 4.5 1.389E+05 2 2 23 4 0.087 68.7 5.556E+05 3 2 15 9 0.133 19.9 2.469E+05 4 I 12 3 0.083 47.8 3.704E+05 5 0 12 6 0.000 23.9 0.000E+00 6 I 14 4 0.071 41.8 2.778E+05 7 0 7 9 0.000 9.3 0.000E+00 8 I 10 1.2 0.100 10,0 9.259E+04 9 0 12 8 0.000 17.9 0.000E+00 10 I 12 6 0.083 23.9 1.852E+05 11 0 3 10 0.000 3.6 0.000E+00 12 I 11 6 0.091 21.9 1.852E+05 13 I 21 6 0.048 41.8 1.852E+05 14 2 20 4 0.100 59.8 5.556E+05 15 I 15 12 0.067 14.9 9.259E+04 16 2 17 9 0.118 22,6 2.469E+05 .RHOi 4.167E+05 6.389E+06 1.852E+06 4.~d~.E+06 2.222E+06 3.889E+06 8.642E+05 9.259E+05 2.222E+06 3.333E+05 2.037E+06 3.889E+06 5.556E+06 1.389E+06 2.099E4-06 F.T. AOE 0Via) 71.2 5:82.2 18.6 5:13.8 28.6 5:21.5 17.9 5:18.6 0.0 5:0.0 15.3 + 15.9 0.0 + 0.0 21.4 _+ 22.5 0.0_+ 0.0 17.9 + 18.6 0.0 5:0.0 19.5 + 20.4 10.2 + 10.5 21.4 + 15.9 14.3 + 14.8 25.2 + 18.9 16 207 21.3 1.533E+05 Area of basic unit-- .0000009 cra-2 Chi Squared --- 5.891 with 15 degrees of freedom P(chi squared) = 98.2 % Correlation Coefficient = 0.654 Variance of SQR(Ns) = 0.29 Variance of SQR(Ni) = 0.78 Ns/Ni = 0.077 5:0.020 Mean Ratio = 0.077 5:0.020 Ages calculated using a zeta of 352.7 + 5 for SRM612 glass Rho D = 1.218E+O6cm-2; ND = 2741 POOLED AGE = 16.6 5: 4.3 Ma MEAN AGE = 17.6 5:4.3 Ma 1.983E+06 33 GMC Data Report No. 178 Page 33/35 34 89 POS 28A APATITE 6,100' - SHUBLIK FM. - KEMIK ~2 IRRADIATION LU060 SLIDE NUMBER 13 COUNTED BY: POS No. Ns Ni Ns I 3 7 24 2 2 9 24 3 0 6 16 4 0 6 9 5 I 3 16 6 I 5 8 7 0 5 18 8 I 3 9 9 0 6 16 10 1 7 ' 16 11 0 5 15 12 1 9 20 13 0 6 12 14 1 4 9 15 1 8 21 16 0 9 20 17 0 4 14 18 0 7 12 19 2 9 20 20 O 10 24 21 1 3 18 22 0 10 20 23 1 6 16 24 1 9 15 25 I 13 27 18 169 RATIO u (ppm,) 0.429 3.5 0.222 4.5 0.000 4.5 0.000 8.0 0.333 2.2 0.200 7.5 0.000 3.3 O.333 4.O 0.000 4.5 0.143 5.2 0.000 4.O 0.111 5.4 0.000 6.0 0.250 5.3 0.125 4.6 0.000 5A 0.000 3A 0.000 7.0 0.222 5.4 0.000 5.0 0.333 2.0 0.000 6.0 0.167 4.5 0.111 7.2 0.077 5.8 4.8 RHOs 1.389E+05 9.259E+04 0.000E+00 0.000E+00 6.944E+04 1.389E+05 0.000E+00 1.235E+05 0.000E+00 6.944E+04 0.000E+00 5.556E+04 0.000E+00 1.235E+05 5.291E+04 0.000E+00 0.000E+00 0.000E+00 1.111E+05 0.000E+00 6.173E+04 0.000E+00 6.944E+04 7.407E+04 4.115E+04 4.773E+04 Area of basic unit = .000(X}09 em-2 Chi Squared = 19.102 with 24 degrees of freedom P(chi squared) = 74.7 % Correlation Coefficient = 0.110 Variance of SQR(Ns) = 0.35 Variance of SQR(Ni) = 0.25 Ns/Ni = 0.106 + 0.026 Mean Ratio = 0.106 ± 0.026 Age~ calculated using a zeta of 352.7 + 5 for SRM612 glass Rho D = 1.218E+06em-2; bid = 2741 POOLED AGE = 22.8 4- 5.7 Ma MEAN AGE = 26.2 4- 5.8 Ma RHOi 3.241E+05 4.167E+05 4.167E+05 7.407E+05 2.083E+05 6.944E+05 3.086E+05 3.704E+05 4.167E+05 4.861E+05 3.704E+05 5.000E+05 5.556E+05 4.938E+05 4.233E+05 5.000E+05 3.175E+05 6.481E+05 5.000E+05 4.630E+05 1.85217+05 5.556E+05 4.167E+05 6.667E+05 5.350E+05 4.482E+05 F.T. AGE (Ma) 9lA 4- 63.1 47.6 + 37.2 0.0 4- 0.0 0.0 + 0.0 71.2 + 82.2 42.8 ± 46.9 0.0 ± 0.0 71.24- 82.2 0.0 5:0.0 30.6 ± 32.7 0.0 + 0.0 23.8 ± 25.1 0.0 ± 0.0 53.5 ± 59.8 26.8 ± 28.4 0.0 + 0.0 0.0 + 0.0 0.0 ± 0.0 47.6 ± 37.2 0.0 + 0.0 71.24- 82.2 0.0 + 0.0 35.7 4- 38.6 23.84- 25.1 16.54- 17.1 GMC Data Report No. 178 Page 34/35 KEMIK ~r2 89 POS 26A M.L. = 7.89 N--I LENGTH DISTRIBUTIONS 89 POS 27A M.L = 7.73 S.D. = 3.448 N=2 35 89 POS 28A M.L. = 12.04 S.D. = 2.86 =N = 21 5 10 15 TRACK t.~GTH (pm) GMC Data Report No. 178 Page 35/35
