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Home My WebLink AboutGMC Data Report No. 225 Apatite fission track data derived from cuttings of the following Alaskan arctic White Hills oil and gas wells: ARca Alaska Inc. Kavik No.1 (75' - 9,540'), and BP Exploration (Alaska) Inc. Kemik Unit No.1 (710' -10,000'). r~ GE~O.'¿Q I~t ~ ~( ~ 0 ~¡ALS Received 6 May 1994 Total of 14 pages in report Alaska Geologic Materials Center Data Report No. 225 GEOTRACK # 312 Alaska ~....-......._...-.... -- ----..........--.. -~.........--..--......... ....-- - - - - -... - - -....... -'-...-....... _.- ..........---.....-....-- Sample Sample Sample Stratipaphic Number Type .Depth SubdivisIon (ft) /<.eYf'li!<;-/ ~ _ "Vo~.-..-., , . aC312- 1 All samples Il1: cuttings 710-1500 Late CreUlcious · 2 2420..2800 :Early Cretadous - 2 3590-'fMJD J'urassic .. 4 4440 '72ò :Early Creæcious .. $ a55D..883D Triassic · 6 9000-~ Triassic ) 9. t)O¿) -Ill; 0(:)0 :; ~~ Ka viK -~/ q// ~~.~ ~w...rh,/!' - - . ~.... - - .. 7 75-.560 Late Crcœdous .. 8 1900- 2400 LateCrctac!ous .. 9 3080-3460 Early Cretacious -10 4Z60-4760 Triassic ·11 4700-$100 Triassic -12 5S60..6010 Mis sissipî an ·13 7200·;7100 !vt1ssissi pian ·14 8960-9540 ~fississipîan )J GMC Data Report No. 225 1/14 Table B.2: Length distribution summary data · samples from White Hills, Alaska (Geotrack Report #312) Sample Mean Standard Nwnber Number of Tracks in Length InterVals (µ.m.) nwnber track length deviation of tracks 1 2 3 4 S 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 (µm) (µIn) (N) C '" ftl ''''1-; I Kemik-l 71()..1'5()() ,. GC312-1 ;l.1f~¿)-~81)() - GC312-2 '3$f()..IfOt){)'- GC312-3 't'ftft)-tf7J.CJ' - GC312-4 <6~-5'048gJO'- GC312-S 900()'·..lq aJ()'_ GC312-6 eki-t/7$ Kavik-l 75"-5"6t/ I 0C312-7 10.51 ± 0.84 /9t7tJ-2ift?tJ GC312·8 11.16 ± 0.68 3/)8()-Pf¿O' GC312-9 12.23 ± 0.43 ¥2ttJ-'761/ GC312·10 11.86 ± 0.26 't7PtJ"S'IO() I GC312-11 10.06 ± 0.88 ~t?¿ð"'6/)1() I 0C312-12 No apatite 72tJ()· ?1'1l(J I GC312-13 7.63 ± 1.43 r¿>1¿tJ.... ?~'~' 0C312-14 6.89 ± 1.19 13.11 ± 0.82 2.17 10.90 12.08 ± 0.38 1.62 9.81 ± 2.12 3.00 No apatite No confined cracks 3.13 3.09 2.17 0.91 . 3.30 3.20 3.15 7 1 18 2 - 1 1 - 1 - 3 1 - - 1 .. - 124 5 23.. - 1 - 1 - - .. .. .. 4' . .. .. .. .. - .. - .. - .. - . - - - 14 21 2S 12 14 . 1 - 1 1 3 3 2 1 1 - - 11- 1... 1 . 1 742 3 - -I 1126446- .. - - - -1- 632-- 1 - 1 - - 1 - 1 522 - 1 - .. - .. . S 7 -1-1- -1- 2- - 121 - - 1 - 2 - .. - - - Track length measurements by P. O'Sullivan. GMC Data Report No. 225 - 2/14 GC312-1 APATITE IRRADIATION G184 SLIDE NUMBER 1 COUNrED BY: POS No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 4 29 70 0.138 6.8 9.080E+04 6.583E+05 30.8 ± 16.4 2 18 103 100 0.175 16.9 2.860E+05 1.637E+06 39.0 ± 10.0 3 0 2 30 0.000 1.1 O.OOOE+OO 1.059E+05 O.O± 0.0 4 1 . 1 42 1.000 0.4 3.783E+04 3.783E+04 219.8 ± 310.9 5 3 20 40 0.150 8.2 1.192E+05 7.945E+05 33.5 ± 20.7 6 0 9 42 0.000 3.5 O.OOOE+OO 3.405E+05 0.0 ± 0.0 7 3 9 30 0.333 4.9 1.589E+05 4.767E+05 74.1 ± 49.4 8 2 10 56 0.200 2.9 5.675E+04 2.838E+05 44.6 ± 34.5 9 2 14 63 0.143 3.6 5.045E+04 3.531E+05 31.9 ± 24.1 10 9 36 100 0.250 5.9 1.430E+05 5.721E+05 55.7 ± 20.8 11 0 2 70 0.000 0.5 O.OOOE+OO 4.540E+04 0.0 ± 0.0 12 1 13 100 0.077 2.1 1.589E+04 2.066E+05 11.2 ± 17.8 13 9 20 80 0.450 4.1 1.788E+05 3.973E+05 99.9 ± 40.2 14 0 3 36 0.000 1.4 O.OOOE+OO 1.324E+05 O.Ot 0.0 15·,. 8 62 30 0.129 33.9 4.238E+05 3..284E+06 28.8± 10.g 16 0 4 100 0.000 0.7 O.OOOE+OO 6.356E+04 0.0 ± 0.0 17 0 1 60 0.000 0.3 O.OOOE+OO 2. 648E+04 O.O± 0.0 18 2 4 80 0.500 0.8 3.973E+04 7.945E+04 110.9 ± 96.0 19 0 1 20 0.000 0.8 O.OOOE+OO . 7.945E+04 0.0 ± 0.0 20 0 6 100 0.000 1.0 O.OOOE+OO 9.534E+04 O.O± 0.0 62 349 4.6 7.888E+04 4.440E+05 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 17.798 with 19 degrees of freedom P(chi squared) = 53.6 % COITelation Coefficient = 0.926 Variance of SQR(Ns) = 1.65 Variance of SQR(Ni) = 5.89 Age Dispersion = 4.256 % (did not converge) Ns/Ni = 0.178 ± 0.024 Mean Ratio = 0.177 ± 0.055 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 39.6 ± 5.6 Ma CENTRAL AGE = 39.6 ± 5.6 Ma GMC Data Report No. 225 3/14 GC312-3 APATITE IRRADIATION 0184 SLIDE NUMBER 3 . COUNTED BY: POS No. Ns Ni Na RA TIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 2 10 30 0.200 5.5 1.059E+05 5.297E+05 44.6 ± 34.5 2 0 16 16 0.000 16.4 O.OOOE+OO 1.589E+06 O.O± 0.0 3 0 24 32 0.000 12.3 O.OOOE+OO 1. 192E+06 0.0 ±O.O 4 23 52 28 0.442 30.5 1.305E+06 2.951E+06 98.2 ± 24.7 5 1 8 35 0.125 3.8 4. 540E+04 3.632E+05 27.9 ± 29.6 6 5 43 28 0.116 25.2 2.838E+05 2.440E+06 26.0 ± 12.3 7 0 74 20 0.000 60.7 O.OOOE+OO 5.880E+06 O.O± 0.0 8 30 155 35 0.194 72.7 1.362E+06 7.037E+06 43.1 ± 8.7 61 382 28.0 4.327E+05 2.710E+06 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 37.764 with 7 degrees of freedom P(chisquared) = 0.0 % Correlation Coefficient = 0.777 Variance of SQR(Ns) = 4.74 Variance of SQR(Ni) = 10.44 Age Dispersion = 96.566 % Ns/Ni = 0.160 ± 0.022 Mean Ratio = 0.135 ± 0.053 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 35.6 ± 5.0 Ma CENTRAL AGE = 27.9 ± 11.1 Ma GMC Data Report No. 225 4/14 GC312-2 APATITE IRRADIATION G184 SLIDE NUMBER 2 COUNTED BY: POS No. Ns Ni Na RATIO U (ppm) 1 2 3 1 16 7 24 8 173 43 224 0.125 5.3 0.092 40.6 0.163 16.8 25 70 42 RHOs 6.356E+04 3.632E+05 2.648E+05 RHOi F.T. AGE (Ma) 5.085E+05 27.9 ± 29.6 3.927E+06 20.6 ± 5.4 1. 627E+06 36.3 ± 14.8 26.8 2.784E+05 2.598E+06 Area of basic unit = 6.293E..07 cm-2 Chi Squared = 1.407 with 2 degrees of freedom P(chi squared) = 49.5 % COlTelation Coefficient = 0.979 Variance of S QR(Ns) = 2.26 Variance of SQR(Ni) = 27.33 Age Dispersion = 0.013 % (did not converge) Ns/Ni = 0.107 ± 0.023 Mean Ratio = 0.127 ± 0.020 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 23.9 ± 5.2 Ma CENTRAL AGE = 23.9 ± 5.2 Ma GMC Data Report No. 225 5/14 OC312-4 APATITE IRRADIATION 0184 SLIDE NUMBER 4 COUNTED BY: POS No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 2 37 32 0.054 19.0 9.932E+04 1.837E+06 12.1 ± 8.8 2 0 4 20 0.000 3.3 O.OOOE+OO 3.178E+05 O.O± 0.0 3 0 9 20 0.000 7.4 O.OOOE+OO 7.151E+05 O.O± 0.0 4 2 14 18 0.143 12.8 1.766E+05 1.236E+06 31.9 ± 24.1 5 5 41 54 0.122 12.5 1.471E+05 1.207E+06 27.2 ± 12.9 6 1 38 35 0.026 17.8 4.54OE+04 1.725E+06 5.9± 6.0 7 0 5 9 0.000 9.1 O.OOOE+OO 8.828E+05 0.0 ± 0.0 8 0 12 20 0.000 9.8 O.OOOE+OO 9.534E+05 0.0 ± 0.0 10 160 12.6 7. 640E+04 1.222E+06 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 6.023 with 7 degrees of freedom P(chi squared) == 53.7 % . COITelation Coefficient = 0.746 Variance of SQR(Ns) = 0.77 Variance of SQR(Ni) = 3.30 Age Dispersion = 14.386 % (did not converge) Ns/Ni = 0.062 ± 0.020 Mean Ratio = 0.043 ± 0.021 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 14.0 ± 4.6 Ma CENTRAL AGE = 13.9 ± 4.6 Ma GMC Data Report No. 225 6/14 GC312-6 APATITE IRRADIATION G184 SLIDE NUMBER 6 COUNTED BY: POS No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 0 3 63 0.000 0.8 O.OOOE+OO 7.567E+04 O.O± 0.0 2 0 9 100 0.000 1.5 O.OOOE+OO 1.430E+05 O.O± 0.0 3 0 25 25 0.000 16.4 O.OOOE+OO 1.589E+06 O.O± 0.0 4 0 6 30 0.000 3.3 O.OOOE+OO 3. 178E+05 O.O± 0.0 5 0 9 20 0.000 7.4 O.OOOE+OO 7.151E+05 O.O± 0.0 6 0 10 64 0.000 2.6 O.OOOE+OO 2.483E+05 o.o± 0.0 7 0 28 36 0.000 12.8 O.OOOE+OO 1.236E+06 0.0 ± 0.0 8 1 22 25 0.045 14.4 6.356E+04 1.398E+06 10.2 ± 10.4 9 0 4 15 0.000 4.4 O.OOOE+OO 4.238E+05 O.O± 0.0 10 0 1 27 0.000 0.6 O.OOOE+OO 5.885E+04 0.0 ± 0.0 11 0 14 28 0.000 8.2 O.OOOE+OO 7.945E+05 0.0 ± 0.0 1 131 5.0 3.670E+03 4.808E+05 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 4.775 with 10 degrees of freedom P(chi squared) = 90.6 % Correlation Coefficient = 0.362 Variance of SQR(Ns) = 0.09 Variance of SQR(Ni) = 1.92 Age Dispersion = 10.896 % (did not converge) Ns/Ni = 0.008 ± 0.008 Mean Ratio = 0.004 ± 0.004 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 1.7 ±. 1. 7 Ma CENTRAL AGE = 1.7 ± 1. 7 Ma GMC Data Report No. 225 7/14 No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 0 18 100 0.000 3.0 0.000£+00 2.860E+05 0.0 ± 0.0 2 6 18 50 0.333 5.9 1.907E+05 5.721E+05 74.1 ± 35.0 3 1 1 49 1.000 0.3 3..243E+04 . 3.243E+04 219.8 ± 310.9 4 0 3 36 0.000 1.4 O.OOOE+OO 1.324E+05 0.0 ± 0.0 5· 4 20 40 0.200 8.2 1.589E+05 7.945£+05 44.6 ± 24.4 6 3 12 64 0.250 3.1 7.449E+04 2.980E+05 55.7 ± 36.0 7 0 3 32 0.000 1.5 O.OOOE+OO 1.490E+05 0.0 ± 0.0 8 7 37 30 0.189 20.2 3.708E+05 1.960E+06 42.2 ± 17.4 9 6 18 60 0.333 4.9 1.589E+05 4.767E+05 74.1 ± 35.0 10 0 5 48 0.000 1.7 O.OOOE+OO 1.655E+05 0.0 ± 0.0 11 2 11 36 0.182 5.0 8.828E+04 4.855E+05 40.5 ± 31.2 12 0 4 25 0.000 2.6 O.OOOE+OO 2.542E+05 0.0 ± 0.0 13 0 8 36 0.000 3.6 O.OOOE+OO 3.531E+05 0.0 ± 0.0 14 2 7 28 . 0.2.86 4.1 1. 135E+05 3.973E+05 63.6 ±. 51.0 15 4 16 40 0.250 6.6 1.589E+05 6.356E+05 55.7± 31.2 16 0 10 49 0.000 3.4 O.OOOE+OO 3.243E+05 0.0 ± 0.0 17 0 7 36 0.000 3.2 O.OOOE+OO 3.090E+05 0.0 ± 0.0 18 38 115 25 0.330 75.5 2.415E+06 7.310E+06 73.5± 13.9 19 2 5 35 0.400 2.3 9.080E+04 2.270E+05 88.8 ± 74.4 20 2 36 49 0.056 12.1 6.486E+04 1. 167E+06 12.4 ± 9.0 77 354 6.7 1.410E+05 6.481E+05 Area of basic unit = 6.293E-07 cm..2 Chi Squared = 25.833 with 19 degrees of freedom P(chi squared) = 13.5 % Correlation Coefficient = 0.953 Variance of SQR(Ns) = 2.26 Variance of SQR(Ni) = 4.61 Age Dispersion = 43.316 % Ns/Ni = 0.218 ± 0.027 Mean Ratio = 0.190 ± 0.053 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 48.5 ± 6.2 Ma CENTRAL AGE = 40.7 ± 7.7 Ma GMC Data Report No. 225 8/14 GC312-7 APATITE IRRADIATIONG184 SLIDE NUMBER 7 COUNTED BY: POS ,- GC312-8 APATITE IRRADIATIONG184 SLIDE NUMBER 8 COUNTED BY: POS No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 5 28 - 30 0.179 15.3 2.648E+05 1.483E+06 39.8 ± 19.4 2 0 4 28 0.000 2.3 O.OOOE+OO 2.270E+05 0.0 ± 0.0 3 4 28 40 0.143 11.5 1.589E+05 1.112E+06 31.9 ± 17.1 4 1 4 49 0.250 1.3 3.243E+04 1.297E+05 55.7 ± 62.3 5 0 1 25 0.000 0.7 O.OOOE+OO 6.356E+04 O.O± 0.0 6 1 10 80 0.100 2.1 1.986E+04 1.986E+05 22.3 ± 23.4 7 1 1 64 1.000 0.3 2.483E+04 2.483E+04 219.8 ± 310.9 8 2 10 30 0.200 5.5 1.059E+05 5.297E+05 44.6 ± 34.5 9 24 227 36 0.1 06 103.5 1.059E+06 1.oo2E+07 23.6± 5.1 10 1 12 40 0.083 . 4.9 3.973E+04 4.767E+05 18.6 ± 19.4 11 4 35 50 0.114 11.5 1.271 E+05 1.112E+06 25.5 ± 13.5 12 0 16 80 o.boo 3.3 O.OOOE+OO 3. 178E+05 O.O± 0.0 13 1 11 25 0.091 7.2 6.356E+04 6.992E+05 20.3 ± 21.2 14 1 6 42 0.167 2.3 3.783E+04 2.270E+05 37.2 ± 40,Z 15 8 28 42 0.286 10.9 3.027Ë+OS 1.059E+06 63.6 ± 25.5 16 1 35 32 0.029 18.0 4.966E+04 1.738E+06 6.4± 6.5 17 0 7 12 0.000 9.6 O.OOOE+OO 9.270E+05 0.0 ±o.o 18 7 46 80 0.152 9.4 1. 390E+05 9. 137E+05 33.9 ± 13.8 19 3 7 18 0.429 6.4 2. 648E+05 6. 180E+05 95.1± 65.7 20 1 94 100 0.011 15.4 1.589E+04 1.494E+06 2.4± 2.4 65 610 11.1 1. 144E+05 1.073E+06 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 31.846 with 19 degrees of freedom P(chi squared) = 3.3 % COITelation Coefficient = 0.880 Variance of SQR(Ns) = 1.39 Variance of SQR(Ni) = 10.74 Age Dispersion = 45.200 % Ns/Ni = 0.107 ± 0.014 Mean Ratio = 0.167 ± 0.050 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 23.8 ± 3.2 Ma CENTRAL AGE = 26.1 ± 5.0 Ma GMC Data Report No. 225 9/14 GC312-9 APATITE . IRRADIATION G184 SLIDE NUMBER 9 COUNTED BY: POS No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 0 45 80 0.000 9.2 O. OOOE +00 8.938E+05 0.0 ± 0.0 2 14 228 90 0.061 41.6 2.472E+05 4.026E+06 13.7± 3.8 3 14 221 27 0.063 134.4 8.240E+05 1.301E+07 14.2 ± 3.9 4 18 243 18 0.074 221.6 1.589E+06 2. 145E+07 16.5 ± 4.1 5 13 97 40 0.134 39.8 5. 164E+05 3.853E+06 29.9± 8.9 6 0 21 64 0.000 5.4 O.OOOE+OO 5.214E+Q5 0.0 ± 0.0 7 6 69 12 0.087 94.4 7.945E+05 9. 137E+06 19.4 ± 8.3 8 0 7 36 0.000 3.2 O.OOOE+OO 3.090E+05 0.0 ± 0.0 9 9 180 60 0.050 49.2 2.384E+05 4.767E+06 1L2± 3.8 10 8 39 30 0.205 21.3 4.238E+05 2.066E+06 45.7 ± 17.8 11 0 66 50 0.000 21.7 O.OOOE+OO 2.098E+06 0.0 ± 0.0 12 2 14 25 0.143 9.2 1.271E+05 8.899E+05 31.9 ± 24.1 13 7 44 42 0.159 17.2 2.648E+05 1.665E+06 35.5 ± 14.5 . 14 5 65 60 0.077 17.8 1.324E+05 1.721E+06 17.2 ± 8.0 15 0 5 16 0.000 . 5.1 O.OOOE+OO 4.966E+05 0.0 ± 0.0 16 7 91 50 0.077 29.9 2.225E+05 2.892E+06 17.2 ± 6.8 103 1435 33.7 2.338E+05 3.258E+06 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 29.799 with 15 degrees of freedom P( chi squared) = 1.3 % Coxrelation Coefficient = 0.866 Variance of SQR(Ns) = 2.45 Variance of SQR(Ni) = 19.00 Age Dispersion = 38.059 % (did not converge) Ns/Ni = 0.072 ± 0.007 Mean Ratio = 0.071 ± 0.016 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 16.0 ± 1.7 Ma CENTRAL AGE = 16.5 ± 2.6 Ma GMC Data Report No. 225 10/14 GC312-10 APATITE IRRADIATION G184 SLIDE NUMBER 10 COUNTED BY: POS No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 2 56 16 0.036 57.5 1.986E+05 5.562E+06 8.0 ± 5.7 2 85 264 70 0.322 61.9 1.930E+06 5.993E+06 71.6 ± 9.1 3 1 3 16 0.333 3.1 9.932E+04 2.980E+05 74.1 ± 85.6 4 1 57 35 0.018 26.7 4.54OE+04 2.588E+06 3.9 ± 4.0 5 3 11 48 0.273 3.8 9.932E+04 3. 642E+05 60.7 ± 39.6 6 9 47 48 0.191 16.1 2.980E+05 1.556E+06 42.7 ± .15.6 7 5 75 9 0.067 136.8 8.828E+05 1. 324E+07 14.9 ± 6.9 8 3 32 24 0.094 21.9 1.986E+05 2.119E+06 20.9 ± 12.6 9 4 32 28 0.125 18.8 2.270E+05 1.816E+06 27.9 ± 14.8 10 1 42 21 0.024 32.8 7.567E+04 3. 178E+06 5.3 ± 5.4 114 619 32'.3 5.751E+05 3. 123E+06 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 48.996 with 9 degrees of freedom P(chi squared) = 0.0 % Correlation Coefficient = 0.960 Variance of SQR(Ns) = 6.09 Variance of SQR(Ni) = 14.89 Age Dispersion = 73.538 % Ns/Ni = 0.184 ± 0.019 Mean Ratio = 0.148 ± 0.039 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 41.1 ± 4.3 Ma CENTRAL AGE = 27.3 ± 7.8 Ma GMC Data Report No. 225 11/14 GC312-11 APATITE IRRADIATION 0184 SLIDE NUMBER 11 COUNTED BY: POS No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (JYIa) 1 0 225 100 0.000 36.9 O.OOOE+OO 3.575E+06 O.O± 0.0 2 3 12 16 0.250 12.3 2.980E+05 1. 192E+06 55.7 ± 36.0 3 28 28 80 1.000 5.7 5.562E+05 5.562E+05 219.8 ± 59.0 4 0 9 40 0.000 3.7 O.OOOE+OO 3.575E+05 O.O± 0.0 5 7 42 100 0.167 6.9 1.112E+05 6.674E+05 37.2 ± 15.2 6 0 74 64 0.000 19.0 O.OOOE+OO 1. 837E+06 0.0 ± 0.0 7 0 174 70 0.000 40.8 O.OOOE+OO 3.950E+06 O.O± 0.0 8 0 17 16 0.000 . 17.4 O.OOOE+OO 1. 688E+06 0.0 ± 0.0 9 2 18 36 0.111 8.2 8.828E+04 7.945E+05 24.8 ± 18.5 10 3 16 49 0.188 5.4 9.729E+04 5.189E+05 41.8 ± 26.3 11 11 149 70 0.074 34.9 2.497E+05 3.382E+06 16.5 ± 5.2 54 764 19.6 1.339E+05 1. 894E+06 .. . Area of basic unit;: 6.29jE-&icin-2' Chi Squared = 218.389 with 10 degrees of freedom P(chi squared) = 0.0% Correlation Coefficient = -0.141 Variance of SQR(Ns) = 3.03 Variance of SQR(Ni) = 18.80 Age Dispersion = %146.401 % NslNi = 0.071 ± 0.010 Mean Ratio = 0.163 ± 0.088 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 15.8 ± 2.3 Ma CENTRAL AGE = 26.7 ± 12.6 Má GMC Data Report No. 225 12/14 OC312..13 APATITE IRRADIATION 0184 SLIDE NUMBER 12 COUNTED BY: POS No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 0 15 60 0.000 4.1 O.OOOE+OO 3.973E+05 0.0 ± 0.0 2 0 14 25 0.000 9.2 O.OOOE+OO . 8.899E+05 O.O± 0.0 3 0 47 25 0.000 30.9 O.OOOE+OO 2.987E+06 0.0 ± 0.0 4 0 153 50 0.000 50.2 O.OOOE+OO 4.863E+06 O.O± 0.0 5 0 11 40 0.000 4.5 O.OOOE+OO 4.370E+05 O.O± 0.0 6 0 12 16 0.000 12.3 O.OOOE+OO 1. 192E+06 O.O± 0.0 7 14 59 40 0.237 24.2 5.562E+05 2. 344E+06 52.8 ± 15.8 8 3 161 100 0.019 26.4 4.767E+04 2.558E+06 4.2 ± 2.4 9 4 57 90 0.070 10.4 7.063E+04 1.006E+06 15.7 ± 8.1 21 529 19.5 7.482E+04 1.885E+06 Area of basic unit = 6.293E-07 cm-2 êhiSquared::j:· 59~914 with ·8 degrees of freedom P(chisquared) = 0.0 % COlTeladon Coefficient = 0.138 Variance of SQR(Ns) = 1.85 Variance of SQR(Ni) = 13.53 Age Dispersion = % 172.161 % Ns/Ni = 0.040 ± 0.009 Mean Ratio = 0.036 ± 0.026 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 8.9 ± 2.0 Ma CENTRAL AGE = 8.3 ± 5.4 Ma GMC Data Report No. 225 13/14 14/14 GMC Data Report No. 225 No. Ns Ni Na RATIO U RHOs RHOi F.T. AGE (ppm) (Ma) 1 2 22 35 0.091 10.3 9.080E+04 9.988E+05 20.3 ± 15.0 2 12 120 36 0.100 54.7 5.297E+05 5.297E+06 22.3 ± 6.8 3 0 9 20 0.000 7.4 O.OOOE+OO 7.151E+05 0.0 ± 0.0 4 0 19 49 0.000 6.4 O.OOOE+OO 6. 162E+05 0.0 ± 0.0 5 15 321 70 0.047 75.3 3.405E+05 7.287E+06 lOA ± 2.8 6 2 34 16 0.059 34.9 1.986E+05 3.377E+06 13.1 ± 9.6 7 2 29 42 0.069 11.3 7.567E+04 1.097E+06 15.4 ± 11.3 8 0 15 36 0.000 6.8 O.OOOE+OO 6.621E+05 0.0 ± 0.0 9 1 42 70 0.024 9.8 2.270E+04 9.534E+05 5.3 ± 5.4 10 0 25 20 0.000 20.5 O.oooE+OO 1.986E+06 0.0 ± 0.0 11 3 56 30 0.054 30.6 1.589E+05 2.966E+06 12.0± 7.1 12 6 107 30 0.056 58.6 3. 178E+05 5.668E+06 12.5 ± 5.3 13 2 29 30 0.069 15.9 1.059E+05 1.536E+06 15.4 ± 11.3 14 0 19 48 0.000 6.5 O.OOOE+OO 6.290E+05 0.0 ± 0.0 15 8 68 60 0.118 18.6 2.119E+05 1.801E+06 26.3 ± 9.& 16 1 70 56 0.014 20.5 2.838E+04 1.986E+06 3.2 ± 3.2 17 0 67 30 0.000 36.7 O.OOOE+OO 3.549E+06 0.0 ± 0.0 54 1052 25.5 1.266E+05 2.466E+06 Area of basic unit = 6.293E-07 cm-2 Chi Squared = 21.758 with 16 degrees of freedom P(chi squared) = 15.1 % COlTelation Coefficient = 0.864 Variance of SQR(Ns) = 1.59 Variance of SQR(Ni) = 12.93 Age Dispersion = 42.501 % Ns/Ni = 0.051 ± 0.007 Mean Ratio = 0.041 ± 0.010 Ages calculated using a zeta of 352.7 ± 5 for SRM612 glass Rho D = 1.268E+06cm-2; ND = 1995 POOLED AGE = 11.5 ± 1.6 Ma CENTRAL AGE = 11.0± 2.1 Ma GC312-14 APATITE IRRADIATION 0184 SLIDE NUMBER 13 COUNTED BY: POS