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GMC Data Report No. 180
Basic data for Apatite Fission Track analysis of cuttings (413'-12,375') from the Atlantic Richfield Lower Cook Inlet Cost Well No.1. Received 3 February 1991 Total of 12 pages in report Alaska Geologic Materials Center Data Report No. 180 GMC Data Report No. 180 Page 1/12 Table 1: Sample details and apatite yields - samples from well COST 01, Lower Cook Inlet (GeOtrack Report #278) Sample Depth Sample Stra6graphic number (m) typc subdivision StratigraphiC Present Raw Washed Apatitc age temperature'~ weight weight yield.2 (Ma) ('C) (g) COST gI OC278.1 413-526 cuttings West Foreland 38-65 990 260 Very Good (]356-]7269 C~278-~2 671-76:2 cuttings West Foreland .54,9-65 1290 526 Excellent (2200-23009 GC278-3 945-1073 cuttings Kaguyak 65-83 1290 Not Processe~ ($100-$$209 GC275-4 1283.1584 cuings Kaguyak 65-83 1340 334 P. xcellent (4210.4540.) OC278-$ 1466-1530 cuttlags Kaguyak 65-83 780 Not Proec~ GC278-6 1585-1704 cuings HerendeeaLimcstonc 119-131 1440 Not Pr~essed OC278-? 1832-1951 cuttings l-Ia-~ Limestone 119-131 1560 327 Excellent (6010-6400') GC278-8 2133-2225 cuttings Nalmek 144-150 1170 474 Excellent ¢7000-?~009 GC278-9 2783-2911 cuuings NalmeX 150-156 1550 804 ~xcellcnt ~9150-9.550') C, C278-10 3066-$158 cuttings Naknek 156-163 900 469 Excellent (1O060.103609 ~?g. ll 3559.~450 cuings Naknek 1~6-163 1140 648 ~.c~ll~nt ~11020-11520') GC278.12 3621-$688 cuttings Naknek 156-163 850 413 Excellent (11880-12100') C, C278-13 3715-3772 cuttings Naknek 156-16:3 820 Not Processed (12190-12575') 't See A~peadix A for discassion of pr~cnt u:mpcxa=a,c data. · 2 ¥icM ~ on quantity of apatile suitable fo~ p~ge dg~-min~tion. Exeellcm: >20 grai,-tC Very Good: -20 grains; Go~l: 15-20 grains; Fait: 1~15 6rairts; Poor: 5-10 grains; Vcty Poor: ~ $~'a,',~. GMC Data Report No. 180 Page 2/12 GC278-1 APATITE IRRADIATION G 147 SLIDE NUMBER 1 COUNTED BY: GML No. Ns Ni Na RA~O U (ppm) RHOs RHOi F.T. AGE (Ma) 1 12 34 24 2 2 10 24 3 9 30 35 4 7 19 15 5 36 120 60 6 18 33 48 7 13 73 8O 8 14 51 50 9 4 26 36 10 3 20 20 11 4 22 70 12 8 23 3O 13 2 7 10 14 11 35 40 ~ 15 10 12 70 16 6 46 49 17 13 67 90 18 7 10 28 19 I 7 25 20 8 16 70 0.353 20.7 0.200 6,1 0.300 12.5 0.368 18,5 0.300 29.3 0.545 10.1 0.178 13.4 0.274 14,9 0.154 10.6 0,150 14.6 0,182 4.6 0.348 11,2 0.286 10,2 0.314 12.8 0.833 2.5 0.130 13.7 0.194 10.9 0.700 5.2 0.143 4,1 0.500 3.3 7,945E+05 1.324E+05 4.086E+05 7,416E+05 9.534E+05 5.959E+05 2.582E+05 4.449E+05 1.766E+05 2.384E+05 9.080E+04 4.238E+05 3,178E+05 4.370E+05 2.270E+05 1,946E+05 2,295E+05 3,973E+05 6.356E+04 1,816E+05 2,251E+06 6,621E+05 1.362E+06 2,013E+06 3.178E+06 1.092E+06 1.450E+06 1,621E+06 1,148E+06 1.589E+06 4,994E+05 1,218E+06 1.112E+06 1,390E+06 2,724E+05 1.492E+06 1.183E+06 5.675E+05 4,449E+05 3.632E+05 89,6 ± 30.2 50.9 :t: 39.5 76,2 :t: 29.0 93.5 :i: z~l,4 76.2 ± 14.6 138.0 :t: 40.6 45.4 + 13.7 69.8 :!: 21.1 39.2 ± 21.1 38,2 ± 23.7 46,3 + 25.2 88.3 :t: 36.3 72,6 ± 58.3 79,9 :l: 27.7 209.6 + 89.9 33,3 ± 14.5 49,4 + 15.0 176.5 + 87.1 36.4 ± 38.9 126.6+ 54.9 188 661 11.1 3.418E+05 1,202E+06 Area of basle unit = 6.293E-07 cm-2 Chi Squared = 29,814 with 19 degrees of freedom P(chi squared) = 5.4 % Correlation Coefficient = 0.856 Variaace of SQR(Ns) -- 1,32 Variance of SQR(Ni) -- 4,62 Age Dispersion = 25,127 % (did not converge) Ns/Ni = 0,284 + 0,024 Mean Ratio = 0.323 + 0.043 Ages calculated using a zeta of 359.6 + 5 for SRM612 glass Rho D = 1.422E+O6cm-2; ND = 2237 POOLED AGE = 72.3 :t: 6.2 Ma ME,2~\' AGE = 82.0 + 11.0 Ma C£NTRALAGE = 73.9± 8.0Ma F~:OI'I GEOT,C:A~:~, It~TERN ' L GMC Data Report No. 180 I 1. *~. 199,3 Page 3 / 12 GC278-2 APATITE ~IAIION O147 SLIDE NUMBER 2 COUNTIiD 13 Y: GML No. Ns Ni Na RATIO U (ppm) RHOs RHOi F.T. AGE (Ma) 1 54 156 36 0.346 2 4 14 6O 0.286 3 23 77 70 0.299 4 41 49 25 0.837 5 5 22 6O 0227 6 2 6 28 0.333 7 6 26 90 0.231 8 4 17 35 0.235 9 25 81 36 0.309 10 21 76 30 0.276 11 18 56 50 0.321 12 8 19 36 0.421 13 1 32 36 0.031 14 11 39 36 0.282 15 6 28 25 0.214 16 37 136 60 0.272 17 25 113 21 0.221 18 18 71 24 0.254 19 7 34 40 0.206 20 11 23 50 0.478 63.4 2.384E+06 3.4 1.059E+05 '16.1 5.221E+05 28.7 2.606E+06 5.4 1,324E+05 3.1 1.135E+05 4.2 1.059E+05 7.1 1.816E+05 32.9 1.104E+06 37.1 1.112E+06 16.4 5.721E+05 7.7 '3.531E+05 13.0 4.4141~+04 15,9 4.855E+05 16.4 3,814E+05 33.2 9,799E+05 78.8 1,892E+06 43.3 1.1925+06 12.4 2.781E+05 ,6.7 3.496E+05 6.886E+06 87.9 :t: 14.1 3.708E+05 72.6 4- 41.2 1.748E+06 75.9 ± 18.1 3.115E+06 210.4 :t:44.9 5.827E+05 57.8 :k 28.7 3,405E+05 84.7 _-t-69.2 4.591E+05 .58.7 :t:26.6 7.718E+05 59.9 ± 33.3 3.575E+06 78,4 4- 18.1 4.026E+06 70.3 :t:17.4 1.780E+06 81,7 4- 22.2 8.387E~05 106,8 + 45A 1.412E-1-06 8.04' 8.1 1.7ZlE+06 71.7 :k 24.5 1.780E+06 54.6 + 24.6 3.602E+06 69.2 :k 12.9 8.551E+06 56.3 4- 12.5 4.701E-I-06 64.5 :!:17.1 1.351E+06 52.4 :!:21.8 7.310E+05 121.1 :t: 44.5 327 10'75 18.6 6.128E+05 2.014E+06 Ar~a of basic unit = 6,293E-07 cm-2 Chi Squ~red = 40.950 with 19 degrees of fr~m P(chi square, d) -- 0.2 % Correlation Coefficient = 0.869 Variance of SQR(Ns) = 3.05 Variance of SQR(Ni) = 7.57 Age Dispersion = 32.026 % Ns/NJ = 0,304 :l: 0.019 Mcan Ratio = 0.304 ~: 0.034 Ages calculated using a zeta of 359,6 :t: 5 for SRM612 glass Rho D = 1.422E+06cm-2; N~ = 2237 POOLED AGE = 77.3 ± 5.3 Ma MEAN AGE = 77.3 ± 9.0 Ma CENTRAL.AGE = 75.5 + 8.0 Ma GMC Data Report No. 180 Page 4/12 C<2278-4 APATITE IRRADIATION (3147 SLIDE NUMBER 3 COUNTED BY: OML No. Ns Ni Na RATIO 1 6 26 49 0.231 2 4 13 36 0.308 3 65 170 56 0.382 4 13 53 25 0.245 5 12 74 80 0.162 6 14 79 70 0.177 7 16 54 90 0.296 8 11 7 45 1.571 9 40 175 100 0.229 10 15 36 35 0.417 11 21 80 50 0.262 12 5 16 50 0.312 13 la 29 70 0.483 14 17 45 60 0.378 15 31 152 28 0.20~ 16 7 16 56 0.438 17 2 5 50 0.400 18 73 169 72 0.432 19 19 77 80 0.247 20 15 41 45 0.366 U RH0s (ppm) F.T. AGE (Ma) 7.8 1.946E+05 5.3 1.7665+05 44.4 1.844E+06 31.0 8.263E+05 13~5 2.384E+05 16.5 3.178E+05 8.8 2.825E+05 2.3 3.884E+05 25.6 6.356E+05 15.1 6.810E+05 23.4 6.674E+05 4.7 1.589E+05 6.1 3.178E+05 11.0 4.5025+05 79.5 1.759E+06 4.2 1.986E+05 1.5 6.356E+04 34.4 1.611E+06 14.1 3.774E+05 13.3 5.297E+05 8.432E+05 58.7 5.738E+05 78.2 4.824E+06 97.0 3.369E+06 62.4 1.470E+06 al.3 1.793E+06 45.1 9.534E+05 75.3 2.472E+05 389.7 2.781E+06 58.2 1.634E+06 105.7 2.542E+06 66.8 5.085E+05 79.4 6.583E+05 122.3 1.192E+06 95.9 8.626E+06 51.9 4.540E+05 110.9 1.589E+05 101.5 3.730E+06 109.5 1.529E+06 62.8 1.448E+06 92.9 + 26.6 ± 44.7 -t- 14.4 :k 19.4 ± 12.9 :[: 13.1 ± 21.5 ± 188.7 + 10.3 ± 32.6 + 16.5 + 40.7 ± 39.9 :k 27.4 + 10.3 ± 50.3 -l- 84.9 + 15.6 ± 16.2 ± 28.1 1317 16.8 5.542E+05 1.825E+06 Area of basic unit = 6.293E-07 cra-2 Chi Squared = 44.563 with 19 degrees of freedom P(chi squared) -- 0.1% Correlation Coefficient = 0.888 Variance of SQR(Ns) = 3.39 Variance of SQR(Ni) = 12.05 Age Dispersion = 26.327 % Ns/Ni = 0.304 ± 0.017 Mean Ratio -- 0.377 ± 0.066 Ages calculated using a zeta of 339.6 _+ 5 for SRM612 glass Rho D = 1.422E+06cm-2; ND = 2237 POOLED AGE = 77.2 + 4.8 Ma MEAN AGE = 95.7 ± 17.0 Ma CENTRAL AGE = 78.6 ± 7.3 Mz~. FROI1 G E 0 T F..,~£ ~. INTERN'L GMC Data Report No. 180 Page 5/12 GC278-7 APATYrE IRRADIATION O 147 SLIDE NUMB[IR 4 COUNTED BY: ONIL .., No. Ns Ni Na RATIO U RHOs (ppm) RHOi F.T. AOE I 4, 11 50 2 1 5 24 3 37 107 24 4 4 11 32 5 5 4 10 6 2 15 80 7 14" 27 80 8 18 37 20 9 I0 18 60 10 '10 13 70 11 5 13 60 12 0 7 25 13 3 15 50 14 22 63 45 15 29 64 40 16 5 4 20 17 2 6 24 18 1 6 32 19 14. 20 40 20 4 15 48 0.364 0.200 0.346 0.364 1.250 0.133 0,519 0.486 0_556 0.769 0.385 0.200 0.349 0.453 1.250 0.333 0.167 0.700 0.267 3.2 1.271E+05 3.0 6.621E+04 65.3 2.450E+06 5.0 1.986E+05 5.9 7.945E+05 2.7 3.973E+04 4.9 "2.781E+05 27.1 1.430E+06 4.4 2.648E+05 2.7 2.270E+05 3.2 1.324E+05 '4.1 0.000E+00 4.4 9.534E+04 20.5 7.769E+05 23,4 1.1..52E+06 2.9 3.973E+05 3.7 1,324E+05 2.7 4.9661!+04 7.3 5,562E+05 4.6 1.324E+05 3.496E+05 3.311E+05 7.085E+06 5.462E+05 6.356E+05 2.980E+05 5.363E+05 2.940E+06 4.767E+05 92.3 + 53.9 50.9 :l: 55.8 87.8 ± 16.9 92.3 + 53.9 311.9 :k 209.4 34.0 ± 25.6 131.2 ~: 43.3 123.2 :k 35.5 140.5 ± 55.5 2.951E+05 193.7 :k 81.6 3.443E+05 97.6 :t: 51.4 4.449E+05 0.0 :t: 0.0 4.767E+05 50.9:1: 32.2 2.225E+06 88.7 ± 22.1 2.542E+06 114.8 :l:25.9 3.178E+05 311.9 ::!: 209.4 3.973E+05 84.7 ::l:69.2 2.980E+05 42.5 ::l:45.9 7.945E+05 176.5 :l:61.7 4.966E+05 67.8 ::l:38.2 8.784E+05 190 461 8.1 3.620E+05 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 22.3i0with 19 degr~s of freedom P(chi squared) = 26.9 % Corm~on Coefficient = 0.950 Variance of SQR(Ns) = 2.47 V~i~ce of SQR(Ni) = 5.02 Age Dispersion --- 2.653 go (did not converge) Ns/Ni = 0.412 + 0.036 Mean Ratio = 0.454 + 0.074 Ages calculated using a zeta of 359.6 4- 5 for SRM612 glass Rho D -- 1.422E+O6cm-2; ND = 2237 POOLED AGE = 104.5 + 9.4 Ma bLEAN AGE = 115.2't' 18.gMa CENTRAL AGE = 104.6± 9.4 Ma GMC Data Report No. 180 Page 6/12 GC278-8 APATITE IRRADIATION G147 SLIDE NUMBER 5 COIJ1WFED BY: GML No. Ns Ni Na RA~O U (ppm) RHOs RHOi F.T. AGE (Ma) 1 6 6 50 2 66 166 40 3 35 68 100 4 6 11 40 5 5 4 32 6 46 74 40 7 2 2 40 8 22 46 40 9 1 8 60 10 7 12 80 11 99 203 40 12 45 71 50 13 16 37 36 14 6 6 60 15 3 7 50 16 0 2 20 17 4 5 63 18 5 5 80 19 5 4 40 20 19 22 28 1.000 1.8 0.398 60.8 0.515 10.0 0.545 4.0 1.250 1.8 0.622 27.1 1.000 0.7 0.478 16.8 0.125 2.0 0.583 2.2 0.488 74.3 0.634 20.8 0.432 15.0 1.000 1.5 0.429 2.0 0.000 1.5 0.800 1.2 1.000 0.9 1.250 1.5 0.864 11.5 1.907E+05 2.622E+06 5.562E+05 2.384E+05 2.483E+05 1.827E+06 7.945E+04 8.740E+05 2.648E+04 1.390E+05 3.933E+06 1.430t!+06 7.063E+05 1.589E+05 9.534E+04 0.O00E+00 1.00OE+05 9.9321~+04 1.986E+05 1.078E+06 1.907E+05 250.7 ::l: 144.9 6.595E+06 100.9 + 14.9 1.081E+06 130.3 :t:27.3 4.370E+05 138.0 :t:70.1 1.986E+05 311.9 4. 209.4 2.940E+06 157.0 :t: 29.7 7.945E+04 250.7 + 250.8 1.827E+06 121.1 ::l: 31.5 2.119E+05 31.9 4. 33.8 2.384E+05 147.4 ::l: 70.2 8.065B+06 123.5 :t:15.5 2.25611+06 160.0::t:30.8 1.633E*06 109.6 :l:32.9 1.589E+05 250.7 4. 144.9 2.225E+05 108.6 + 75.0 1.589E+05 0.0 4. 0.0 1.261E+05 201.3 :k 135.2 9,932£+04 250.7 :t:158,7 1.589E+05 311.9 4- 209.4 1.249E+06 217.1 :t: 68.2 398 759 11.2 6.395E+05 1,220E+06 Area of basic unit = 6.293E-07 em-2 Chi Squared = 20.373 with 19 degrees of freedom P(chi squared) = 37.2 % Correlation Coefficient - 0.982 Variance of SQR(Ns) = 6.78 Variance of SQR(Ni) = 14.46 Age Dispersion = 8.475 % (did not converge) Ns/Ni = 0.524 4. 0.032 Mean Ratio = 0.671 ± 0.076 Ages calculated using a zeta of 359.6 ± 5 for SRM612 glass Rho D = 1.422E+06cm-2; ND - 2237 POOLED AGE = 132.7 :t: 8.9 Ma MEAN AGE = 169.2 +_ 19.7 Ma CENTRAL AGE = 135.1 :t: 9.9 GMC Data Report No. 180 Page 7/12 GC278-9 APATITE IRRADIATION O 147 SLIDE NUMBER 6 COUNTED BY: OML No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (M~) 1 10 19 35 0.526 2 6 20 24 0.3OO 3 5 19 42 0.263 4 28. 46 36 0.609 5 7 20 8 0.350 6 12 19 36 0.632 7 6 5 49 1.200 8 25 60 18 0.417 ., 9 13 49 28 0.265 10 80 147 70 0.544 11 12 31 12 0387 12 49 ' 86 40 0.570 13 19 67 30 0.Z84 14 6 16 32 0375 15 53 109 20 '0.486 16 7 13 35 0.538 17 37 87 60 0.425 18 3 9 49 0.333 19 64 76 24 0.842 20 74 87 16 0.851 7.9 4.540E+05 12.2 3.973E+05 6.6 1.892E+05 18.7 1.236E+06 36.6 1.390E+06 7.7 5.297E+05 1.5 1.946E+05 48.8 2.207E+06 25.6 7.378E+05 30.7 .. 1.816E+06 37.8 1.589E+06 31.5 1.947E+06 32.7 1.006E+06 7.3 2.980E+05 79.8 4.21.1E+06 5.4 3.178E+05 21.2 9.799E+05 2.7 9.729E+04 46.4 4.238E-,-06 79.6 7.349E+06 8,626E+05 133.2 ::l: 52.1 1.32AE+06 76,2 :l: 35.5 7.189E+05 66.9.+ 33,7 2.030E+06 153.8 + 37.1 3.973E+06 88.9 :t: 39.1 8.387E+05 159,5 :l:58,9 1.621E+05 299.7 + 181.6 5.297E+06 2.781E+06 3.337E+06 4.105E+06 3AI6E+06 3.549E+06 7.945E+05 g.660E+06 5.902E+05 2.304E+06 2.919E+05 5,032E+06 8.641E+06 105.7 :l: 25.3 67.5 + 21.1 137.7 ± 19.4 98.2 :l: 33.5 144.0 :t: 26.0 72.1 :t: 18.8 95.2:t: 45.6 123.1 + 20.9 136.2 + 64.0 107.8 + 21.3 84.7 + 56.5 211,8 :t: 36.3 213.9 ± 34.3 516 985 21.7 1.235E+06 2.357E+06 Area of basic unit -- 6.293E-07 cm-2 Chi Squared = 39.479 with 19 degrees of freedom P(ehi squared) = 0.4 % Correlation Coefficient = 0.912 Variance of SQR(Ns) = 5.43 Variance of SQR(Ni) = 7.81 Age Dispersion = 25.925 % Ns/Ni = 0.524 :l: 0.028 Mean Ratio = 0.510± 0.053 Ages calculated using a zeta of 359.6 + 5 for SRM612 glass Rho D = 1.422E+00em-2; ND = 2237 POOLED AGE = 132.6 :t: 7.9 Ma I~IEAN AGE = 129.1 :I: 13.7 3Ia CENTRAL AGE = 125.4:1:11.3 GMC Data Report No. 180 Page 8/12 CK2278-10 APATITE IRRADIATION G147 SLJDE NUMBER 7 CO~D BY: GML No. Ns Ni Na RATIO U RHOs (ppm) F.T. AGE (Ma) 1 6 19 20 0.316 2 3 7 24 0.429 3 1 5 16 0.2OO 4 1 3 15 0.333 5 1 3 24 O.333 6 3 5 12 0.600 7 2 5 12 0.400 8 9 19 30 0.474 9 13 20 30 0.650 10 2 4 30 0.500 11 2 2 9 1.000 12 10 22 12 0.455 13 I 1 12 1.000 14 13 52 42 0.250 15 1 2 9 0.500 16 9 15 8 0.600 17 0 3 14 0.000 18 21 62 20 0.339 19 30 95 70 0.316 20 2 15 64 0.133 13.9 4.767E*05 4.3 1.986E+05 4.6 9.932E+04 2.9 1.059E+05 1.8 6.621E+04 6.1 3.973E+05 6.1 2.648E+05 9.3 4.767E+05 9.8 6.886E+05 2.0 1.059E+05 3.3 3.531E+05 26.8 1.324E+06 1.2 1.324E+05 18.1 4.919E-I-05 3.3 1.766E+05 27.4 1.788E+06 3.1 0.0005+00 45.4 1.669E+06 19.9 6.810E+05 3.4 4.966E+04 1.510E+06 80.2 :l:37.6 4.635E+05 108.6 fl: 75.0 · ~.966E+05 50.9 fl:55.8 3.178E+05 84.7 + 97.8 1.986E+05 8~,.7 + 97.8 6.621E+05 151.6 + 110.8 6.621E+05 101.5 :k84.9 1.006E+06 120.0 fl: 48.6 1.059E+06 164.1 + 58.6 2.119E+05 126.6 fl: 109.7 3.531E+05 250.7 fl: 250.8 2.913E+06 115.2 fl: 44.0 1.32AE+05 250.7 fl: 354.6 1.967E+06 63.6 :[: 19.8 3.531E+05 126.6 :t: 155.1 2.980E+06 151.6 + 6~.0 3.405E+05 0.0 4- 0.0 4.926E+06 86.0 :lc21.8 2.15715+06 80.2 4- 16.9 3.724E+05 34.0 + 25.6 130 359 11.1 4.367E+05 1.206B~6 Area of basic unit = 6.293E-07 cra-2 Chi Squared = 12.837 with 19 degrees of freedom P(chi squared) - 84.7 % Correlation Coefficient -- 0.959 Variance of SQR(Ns) = 1.98 Variance of SQR(Nt) = 5.69 Age Dispersion = 0.927 % (did not converge) Ns/NJ = 0.362 fl: 0.037 Mean Ratio = 0.441-:t: 0.056 Ages calculated using a ~m of 359.6 +_ 5 for SRM612 glass I~o D = 1.422E+O6cm-2; ND = 2237 POOLED AGE = 91.9 :k 9.7 Ma MEAN AGE = 111.9 -t- 14.4 Ma CENTRAL AGE = 91.9 :t: 9.7 Ma 'i ~.~ u ~.1 GEGTKAC~, INTE~N'L GMC Data Report No. 180 6:56 Page g'.lb 9/12 C, C278-11 APA'ITI~ IRRADIATION O147 SLIDE NUMBER 8 COUNTED BY: OML No. Ns Ni Na RATIO U (ppm) RHOs' F.T. AGE (Ma) 1 27 73 2 43 89 3 .... 0 5 4 2 10 5 3 4 6 4 17 7 13 31 8 8 44 9 0 7 10 19 56 11 4 14 12 7 58 13 4 8 14 6 18 15 17 34 16 2 11 17 0 2 18 0 4 19 4 3 20 74 125 18 0.370 59.4 28 0.483 46.5 56 0.000 1.3 40 0.200 3.7 35 0.750 1.7 64 0.235 3.9 40 0.419 11.3 40 0.182 16.1 40 0.000 2.6 30 0.339 27.3 50 0.286 4.1 30 0.121 28.3 49 0.500 2.4 32 0.333 8.2 16 0.500 31.1 35 0.182 4.6 24 0.000 1.2 16 0.000 3.7 35 1.333 1.3 32 0.592 57.2 2.384E+06 2.440E+06 0.000E+00 7.945E+04 1.362E+05 9.932E+04 5.164E+05 3~178E+05 O.O00E+O0 1.(K)6E+06 1.271E+05 3.70815.,+05 1.297E+05 2.980E+05 1.688E+06 9.080E+04 0.000E+00 0.000E.,4~O 1.816E+05 3.675E+06 6.445E+06 5.051E+06 1.419EW05 3.973E+05 1.816E+05 4.221E+05 1.232E+06 1.748E+06 2.781E+05 2.966E+06 4.449E+05 3.072E+06 2.594E+05 8'938E+05 3.377E+06 4.994E+05 1.324E+05 3.973E+05 1.362E+05 6.207E+06 93.9 ± 21.3 122.4 ± 22.9 0.0 ± 0.0 50.9 ± 39.5 188.9 ± 144.4 59.9 ± 33.3 106.3 -l- 35.2 46.3± 17.8 0.0 :t: 0.0 86.2 ± 23.0 72.6 ± 41.2 30.8 ± 12.3 I26,6 + 77.6 84.7 :t: 40.0 126.6 ± 37:7 46.3 -1- 35.6 0.0 ::l: 0.0 0.0 ::i: 0.0 332.2 :t: 253.8 149.6 ± 22.3 237 613 12.6 5.304E+05 1.372E+06 Area of basic unit -- 6.293F.,-07 cm-2 Chi Squared = 38.473 with 19"'degrees of freedom P(ehi squared) = 0.5 % Correlation Coefficient -- 0.931 Variance of SQR(Ns) = 5.10 Variance of SQR(Ni) = 8.15 Age Dispersion = 35.067 % Ns/Ni = 0.387 ± 0.030 Mean Ratio = 0.341 ± 0.071 Ages calculated using a zeta of 359.6 ± 5 forSRM612 glass Raho D = 1.422E+06cm-2; ND = 2237 POOLED AGE = 98.1 ± 7.9 Ma MEAN AGE = 86.7 ± 18.0 Ma CEb~RAL AGE ,. 86.4 -J: 11.3 _xla GMC Data Report No. 180 Page 10/12 GC278-12 APA'ITFE IRRADIATION GC278:G 147 SLIDE NUMBb2R 9 COUNTED BY: GML No. Ns Ni Na RATIO U (ppm) RHOs RHOi F.T. AGE (Ma) 1 2 2 16 1.000 2 0 3 15 0.000 3 0 7 36 0.000 4 2 2 30 1.000 5 3 4 25 0.750 6 0 4 32 0.000 7 7 9 70 0.778 8 3 6 20 0.500 9 5 6 48 0.833 10 I 1 40 1.000 11 3 3 30 1.000 12 4 9 60 0.444 13 8 22 70 0.364 14 2 2 18 1.000 15 2 5 45 0.400 16 6 8 80 0.750 17 2 13 36 0.154 18 2 6 60 0.333 19 12 31 100 0.387 20 4 5 48 0.800 1.8 1.986E+05 2.9 0.000E+00 2.8 0.O00E+O0 1.0 1.059E+05 2.3 1.907E+05 1.8 0.000g+00 1.9 1.589E+05 4.4 2.384E+05 1.8 1.655E+05 0.4 3.973E+04 1.5 1.589E+05 2.2 1.0591D+05 4.6 1.816t/+05 1.6 1.766E+05 1.6 7.06315+04 1.5 1.192E+05 5.3 8.828E+04 1.5 5.297E+04 4.5 1.907t/4-05 1.5 1.324[/+05 1.986E+05 250.7 :!: 250.8 3.178E+05 0.0 :t: 0.0 3.090E+05 0,0 :t: 0.0 1.059E+05 250.7 :t: 250.8 2.542E+05 188.9-1-144.4 1.986E+05 0.0 :t: 0.0 2.043E+05 195.8 -t- 98.8 4.767E+05 126.6 :t: 89.6 1.986E+05 209.6 ± 127.0 3.9735+04 250.7 :t: 354.6 1.589E+05 250.7 :t: 204.8 2.384E+05 112.6 :t: 67.7 4.9945+05 92.3 -e 38.2 1.766E+05 250.7 + 250.8 1.766E+05 101.5 + 84.9 1.589E+05 188.9 + 102.2 5.7385+05 39.2 ± 29.8 1.589E+05 84.7 ± 69.2 4.926E+05 98.2 5: 33.5 1.655E+05 201.3 ± 135.2 68 148 2.5 1.229E+05 2.676E+05 Area of basic unit = 6.293E-07 cm-2 Chi Squared -- 16.753 with 19 degrees of freedom P(chi squared) = 60.7 % Correlation Coefficient - 0,821 Variance of SQR(Ns) -- 0.83 Variance of SQR(Ni) = 1.25 Age Dispersion = 1.439 % (did not converge) Ns/Ni = 0.459 ± 0,067 Mean Ratio = 0.575 + 0.081 Ages calculated using a zeta of 359.6 ± 5 for SRM612 glass R.ho D = 1.422E+06cm-2; ND = 2237 POOLED AGE = 116.4 ± 17.3 Ma MEAN AGE = 145.3 ± 20.8 CENTRAL AGE = 116,4 + 17.3 Ma GMC Data Report No. 180 0C278-1 40 so ~0 10 ~ 10 16 Tf~GK LB%I(tTH (mlorone) GC278-2 4O SO 2O 10 QC278- 2 L.. I S 1.0 t6 20 TRACK LI~JOTH (microns) GC278.4 N ~0 GC278-7 40 30 Page 11/12 10 0C~78o 7 -- S ~ 10 15 20 TRACK LENGTH (microns) GC278-8 40- 3O 20 10 0C:278 ~ 8 $ 10 1S 20 TRACK LENOTH (miCrons) GC278-9 · , - . il 16 20 s 1o 15 20 TRAOK LENOTH (mlorone) TRAC~ LENGTH (mlorofls) Figure 3: Distributions of confined track lengths in samples frown well Cost #1, Lower Cook Inlet. FROM GEOTRACK INTERN'L 11. 9.1990 6:51 P. 11 GMC Data Report No. 180 Page 12/12 GC278-10 E t0 15 20 TRACK LB~IQTH (rolo;one) GC278-11 40 ~0 2O 10 ~ $ 10 15 2:0 TRACK LEHQI'H QC271- 11 OC275-12 40 - 2O 10 QC2?E-12 S 10 1S 20 TRACK LENQTH (ml~t onl) Figure 3' Continued.
