The URL can be used to link to this page

Home My WebLink AboutGMC Data Report No. 247 Potassium-argon whole rock age determinations of core samples from the following Copper River Basin oil and gas exploratory wells: Aledo Oil Co. Eureka No.2 (8,544.5' - 8,545.5'), Amoco Production Co. Ahtna Inc. No.1 (6,878' - 6,880'; 6,891' - 6,893'; and 7,885' - 7,887'), Amoco Production Co. Ahtna Inc. No. A-I (4,894.5' - 4,900.9'), and Mobil Oil Corp. Salmonberry Lake Unit No.1 (7,744' - 7,751'). Received 13 July 1995 Total of 6 pages in report Alaska Geologic Materials Center Data Report No. 247 " ~ GEOCHRON LABORATORIES . clvJaløn of KRUEG~ª~N~~~~~SE~,.INÇ~... ._...._ _ 711 CONCORD AveNUE .. CAMBFUOClE, MASSACHUSETTS 02138 .. u. S. Â TELEPHONE: (817) 878·3891 TELeFAX: (617) 661·0148 POTASSIUM-ARGON AGE DETERMINATION AEPORT OF ANAL VTICAL WORK Our Sample No. _ VourAeferenoe: L.etter of 5/10/95 Date Received: 5/'2/95 Oate Reported: 6/23/95 Sub~ltted By: S~p18 Description & L.ocallty: Sample fl 1 A ~I\ oeo A-\-\"TN A * t eJ)(t~ -: \ Co~l ~-1q ~ b 'ì> '1 't - 'lo to l'l\~O~ \" € MaterIal Analyzed: Whole rook, -80/+200 mesh. Treated with dilute HF and HN03- ~Ar/40K sa .009972 AGe:: 164 +/.. 5 M,Y. - - -, - - -- ... ...... .... ...... ... ...... ..... ... ... ...... -- ..... ..... - - - - - - - - - - - - - .... - - - - A!Q.~!'1_ A"alyses: ¡,o6Ar, "pm .006564 .006731 «¡·Arrrotal.oAr .524 .528 Ave. I,OIAr, ppm .006698 Potuslum Analyses: '/oK 0.556 0.570 Ave. % K 0.563 ~KtPpm 0.672 Constants Used: ï.,- 4.982 x 10:'''lyeår (Î.. + ).,') = 0.581 X 1 Q-tO/year 4OKlK:I:I 1.193 X 10· gIg 1 AGE- _.- Â~ + (Â. + Â.'j In ^'eTQ.,.+~'.) X ~'Ar + 1 ~ +Â') ~K Note: e'Ar refers to radiogenic .oAr. GMC Data Report No. 247 mons of years. 1/6 2/6 ·1 +Q. +^" ) fIj'Ar I n ''''/I · -' X - + 1 (À. + 'AI.) 40 K 1 AGE = ;., + (7., + 7.',) Constants Used: Àø ¡¡ 4,962 X 1 Q-1°/year (1. + ).,tJ = 0.581 x 10-1o/yesr 40KlK . 1 .193 x 1 0'" gIg Note: ItO·Ar rafers to radlogenlc~Ar. GMC Data Report No. 247 .. .,~. ;1"15 of years. 4OK, ppm 0.687 Ave. % K 0.576 .~o,as~lum Analyses: %K 0.583 0.568 Ave. 4O'Ar, ppm .005687 .473 .525 Argon Ana'yses~ l/I'Ar, ppm .00675Q .006623' 4(I'Ar/Total IIJAr -- - -- -.... - - ~ ~ --- - - - - - - - - - - --.....-- -...... - - - -...., -.- _......-- AGE = 160 +/- 5 M.V. .009739 ¥JIAr/4fJK_ A'tv\.fXJ) - A\-\. '\N/\ ~ \ ~o~E '4' \ ~ <¡~\ \ -q ó2 (- b ~9 '). -cï3 , to t'I\ Pð~.ItE- Whole rock, -80/+200 mesh. Treated w1th dilute HF and HN03. Material Analyzed: Sample' 2 Sample Description & l.ocallty: Submitted By: "I Date Received: 5/12/95 Date Reported: 6/23/95 Our Sample No. _ Your Aefefence: Letter of 5/10/95 , REPORT OF ANALYTICAL WORK " ....... POTASSIUM-ARGON AGE DETERMINATION GEOCHRON LABORATORIES . d~tlon of KRUEGER ENTERPRISES, INC. - . . 711 CONCORD AVENUE + OAMBRIDGE, MASSACHUSETTS Q2138 + U. S. Â TELEPHONE: (817) 871.seg1 TELEFAX: (817) 881-0141 GEOCHRON LABORATORIES aciYitiønof KRUEGER ENTERPRISES. ]NC. 711 OONOORD AVENue + CAMBRIDGE, MASSACHUSETTS 02138 + U. S, A TELEPHONE: (817) 878-3891 TELEFAX: (517) .1.01" POTASSIUM-ARGON AGE DETERMINATION REPORT OF ANALYTICAL WORK Our Sample No. _ Your Reference: Letter of' 5/'0/95 Date Received: 5/12/95 Date Reported: 6/27/95 S~~,ml~d 'By: Material Analyzed: A~CO A~\t·H\ ~ \ (:,o~~~;t ~o~,~o~¡::~e.. F ~\'f\ C'\\~~~ , ,<lßS-'bb ~ ('i<lb- ß'1 Whole rock, .80/+200 mesh. Treated with d,ilµte HF and HN03. samPI~ DescriptiOn & ,Locality: sample II 3 40· Ar/40K = .01006 AG,E = 165 +/... 4 M.Y. .........-_-...-...-_----~--------------_......_.-.-------- Aråon ~nalyses: 4lJ*Ar ,ppm 10486 7 .Oij790 : .875 ,885 Ave. 4TJ'Ar, ppm .04829 4O'ArITotalltOAr Potas~!um Anafyses: ." K ~.2'6 4.021 3.832 Ave. 0/. K Jt.025 .oK, ppm 4.802 Constants UsØd: Ào::l 4.962 x 1 0-1a/year .. (Â~ + ).1) . 0.581 x 10·1o/y¡ar 4OK/K . 1. 193 x 10·· gIg Note: ItO·Ar refers to radlogenlo .oAr. '.p.~, .;ns Of years. GMC Data Report No. 247 AGE. ' A, ... (Â. + Â.'.) ( '1 +(Ä.+Â1.) fIJ"Ar , n '''a X - + (Ä,. + ).'.) 40K - 3/6 GEOCHRON LABORATORIES acivtalonat KRU~GER ENTERPRISES~ INC. '111 CONOORO AVENue . CAM8AIOC,Ui. MASSACHUSETTS 02138 + U. S. A TELEPHONE: (817) 878.3801 TELEFAX: (817) 111·0148 POTASSIUM-ARGON AGE DETERMINATION REPORT QF ANAL VTlCAL WORK Our Sample No. _ Vour Aeferenoe: Letter of 5/10/95 Sub~ltted By: q¡¡tB Received: 5/12/95 Date Reported: 6/23/95 \. . , : . ,,. S~~I~ DeSCrlptlbn &! I:.ocàllt~; . S amp le /I II' AMot.c - Ä t-\ íNA A ~ { c...c~\PO~:tT e. f(tDtv\ c..h ¡(J~ \.\CZ~ 4~5/4~C\,S. S ('1~q1\ 1/ Material Analyzed: Whole rook, -80/+200 mesh. ~ß't~. \ / J..\~coA. "trelt~,q: wi,t.h, dilute HF an~ ,H~Q3. 'fO" Ar/t,O~ a . .01002'1; AGf ~ 165 +/-, .ij M.V, ~----~~~~-~-----------~~--~,~~-----~-- Arø9". Analyses': .·Ar:,'· ppm ..02051 . Ó2062 .755 .690 Ave. 4O'Ar, ppm .02057 ~'Arrrotaf #'oAr Po~lum Analyses: ' 'l.K , 1 .737 ,.. 703 Ave. % K 1.720 4OK, ppm 2~052 Constants Used: Ã..- 4.962 x 10·'D/year " (Ã, + ^-IJ = 0.581 x 10·to/year 40KlK . 1. 193 x 10-4 gIg AGe = 1 , In' - ~~Q.,~~.J x I¡4·Ar + 1 ^, 1- (À. 1- ÄI.) , (À. + ).IJ 40K - ',: ;~~øenlo 4tJAr. GMCData Report 1':1°.247. . ::,';".;j 0' years. 4/6 . ) ~ GEOCHRON LABORATORIES ..vi_of KRUEGER ENTERPRISES, INC. . - - 711 CONCORD AVENUE + OAMBArDCII, M.'NA~HUSI!TTS 021:sa ... U . 8 . A , TELEPHONE: {117} 87W1sn TEL&FAX: (1'7) 111.0141 POTASSIUM-ARGON ÀGE DETERMINATION REPORT OF ANALYTICAL WORK O~r Sample No. _ Your Refefence: Letter ot 5/10/95 Date Received: 5/12/95 Date Reported: 6/28/95 SfJb,"~d By: $.,npl~ Oescrfptlon & LocalitY: Sample i1 5 ALEto -~uR~KA~;¡ è..o~E'4\ c.otl\~o~\e. 1S~l\. -S- '~'S4 S.o ($-. ,«s~ s.s I Material Analyzed: Whole rock, -80/.200 mesh. Treatod, w1thd11ute HF and H~03. .. Ar/«JK a .009495 AGE. 156 +/- ,9 M.V, ------------------------..-..-.........--~~---_...........- Argon Analyses: ",. Ar, ppm ,".001013 .001026 :'1 , .271 .2'5 Ave. ·'Ar, ppm .001019 wArlTatal 4GAr Potaillum Analyses: ~K 0.088 0.092 Ave, % K 0.090 -K, ppm 0.107 Oonstants Usèd: ~. 4.982 x 10·1°lyear (1, + Â.';J · 0.581 x 1o-,o/year 40KlK - 1.193 x 1004 gIg AGE. 1 In ~+(Ä,,+ÂI.) x wAr + 1 )., + CA. + À'.) CA. + ÄI J 40K - GMC: Data Report Nö.247:',·· '.~; 'v!Ar. , - . ", .: .' ;,..,..';Jâ of years. 5/6 6/6 ,,:,~,-~.: ,"-Ar ref~~s,to radlogønlceAr. GMC 6~ta·R.&pört. No~"247' '::'-~,ion8 of years. ~ ~ +Ä') lG'Ar In ftløT\"'. · X - + 1 0.. + À':J 40K , AGE.. ^- + ().. ... ')..'J Constànts Used:' ~. 4.9B2',·X1:O·10/year ().. +..).'J - O,S~, x 10'10/year ..oKlK . 1. 193 x 10" gig ; -K. ppm 3.988 Ave. % K ", 3.343 p'~~IUm 'AnalYI.I: %K ,3.373 3.313 ' ------~~,~~~~~~,~._---~~----~~~-~~------ . i . .! .' r " :.' I , ' ,'.. : ¡ ,~ "', .. '; \ ' " ;' ,', ',~' ¡ "; : . ' Atgon Anal~es: .- ,. ; -.. ~, , ":·'··~Âr~ppm :.o'ArlTotal ~Ar Ave. 4O·Ar. ppm : .03997.872 .014021 ~Q40~4 ~889 ,AG~:.!: : ,1~!6 +/~: ,4: M.Y. ~01008!' .. Þ.r/tA,K/ .' " $.~e\ø D8SCr1pt~'; "L.oCIIJ~~ l' S~~p l~i 6 . ~~itL ~ AWô~ e:.E:R. ~ '< kA.\<.E. 'tt ( 'CO\lE ~~ , C:O~f'O~ ,.... 17~L.l ,0 s ( MawnalAnæyzed: Whole rook, -80/+200 mesh. " I .T~e~~~~;,".::~,,~,:i~,':,d,1fute HF a~~ ~~P3.! , ' , I . ' I : ~1' I , . I' ' , , .." , , I . ..... i I ;: ,:¡ "!.. J I, ',. i '¡ , , , I, i; : S'~Jb~~tte~' By: Date Aecelved: 5/ 1 2/95 Date Reported: 6/23/95 Our Sample No. _ Your Reference: Letter of 5/10/95 REPORT OF ANALYTICAL WORK 'OTASSIUM-ARGON AGE DETERMINATION ',' . ..... 'r~ ( <><)) .~~/ GEOCHRON LABORATORIES Idvt"af .. KRUEGER ENTERPRISES, INC. __ 711 CONCORD AVENUE . CAMBRIDGE, ~VP^CHU8E1i8 02138 + U. S. A TliLEPWON&: (It 7) 87W8&1 TELEPAX: (017) .'.01"