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Home My WebLink AboutGMC Data Report No. 169Vitrinite reflectance data of cuttings (6000' - 14870') from t/%e Pan American Napatuk Creek No. i well. See GMC Data Report No. 5. Received 27 september. 1990 · Total of 17 pages in report · Alaska Geologic Materials Center Data Report No. 169 61 i 61 <C) C) J 0 t.~ · I 4-4 12- J 61 0 I fi- ','- fi" C:) d~ I I 'i' I I~ I I I 9 0 01 61 Mn: = ee~ I ,. 8/" :.5 D: ,3. 0 9 20- ,.: ~4,..:.,..=,..: 16- 12- 61 c~ 0 I I,,4 2 CI - 16- 1Z- i Z . . .:. · ~, '.~,. ., .,o .,. ' · ,,,o , ..~ · , ., '.'i' '' ., .~. ~,x 0 ¢o0o 0 I I~1 0 CZ. I 0- lt5- 0 I N 4 g 12' ¥ Z O. 0 0 1 6 1 : 0 n "' 20' 16' 12' ,, , 0 ·~a~,', ' ~ '.~..~ .'-. · · ~ , ,~ ":"" .'i'". , · . : · ,~.. .. .. ,., ,: · , , ., . ~ .~. '..? ,. · ~ . ,,.. :'. , . · ~ '.2 ... ,. ,, . ... '' ,, .. , '.~..' .. j' . ,. ... ~, · ' 7;. · -,' . . . ...'.. .. ,'.; · .. ...,. .... - .. ,~'.. ..( .. .~' .~.. .. .,;. · .. 5'1 .20- 16- 12- i I N I 20- 16' 12' . 61 I N 16- I I i i i --I i i I I c.Yr.-'', ,r'.,,c-'-', c.5 C',, c,,, c~ 43 ca, .~.,. q~. '2. '- ' ' --'' ~'' 'b' .'o. g 0 0 1 I',,,~ n: 61 20- 12- ~ g 0 0 1 6 1 1 I I ' I ,?, C',,, :.,,,,t:'._,,, ,,,-, ,t',,..., ,-, ,,';. ,,, .. 9 0 0 1 6 1 t',,,1 n: ~ 3 4~' '-'D C~ '~ !] - 18- 1 '2 - ! · o I IN I I I T I i United States Department of the Interior OEOLOOI~L SURVEY BOX 25046 M.S. ~ DENVER FEDERAL CENTER DENVER. COLORADO 80225 I 17 September, 1990 John Reeder P.O. Box 772116 Eagle River, AK 99577-2116 John: "" I am returning the prepared samples I borrowed from the state back in January. Enclosed, also, you will find data and histogram sheets for almost all the samples. Some samples did have organic material I deemed good enough to measure. For the most part, the samples were good and the results are evident, at least individually. Taken on a well-by-well basis several were difficult to make good sense out of from an organic petrology point of view. The shape of the histogram~,~s a good general indicator of consistency of the organics contained within and in the confidence I had while examining the samples. My technique was to. me.asuTe at .~e..?ast.5.O organic grains,:..while ~rying to .stay.~ithin a..narrow . range, This becomes difficult with increased vitrinite :reflectance, and the histogram spread ,increases. With adequate material and consistent rank (contamination from uphole carings can introduce diverse groups of organics).the. histogram will have some kind of a bell curve shape. Gaps in the histogram, relating to~-multiple ,populations':i'~f~-organics;-~are':8'.problem ~and 'dilute 'the strength of the mean value asa good measure of the thermal maturity. These gaps are more common at the higher ranks, (> 1.5~ reflectance), but occur at lower ranks when insufficient material exists or there is contamination in the sample. I admit to certain biases against samples prepared bypeople'other than myself, and these samples were made by several different companies. I feel I lose too much control over the processing of the cuttings and.do not'have the confidence in other people's dedication to the work. -._ I hope these data can be of some use to you. If I can help by providing' additional information, please let me know. Thank you for providing the samples,-'and for your assisstance while I was visiting. "" · GMC Data Report No. 169 -' Page 17/17. : · .. : . . .. . · '~" .... :" "" '~' ..... ...... ' .:! ~[ !":)i.:.'~ "' .... ~:;~ .:~.:~'.'": ' ';:;:_;-i.;~ ::~ :~.. "' · "' ' ' "':"' ::: ' :':":' [',.': .: .' ~i");::-,' ~:'- ~ ~i .' .... ........ . .."...', .... ; .... ..., ..... . .... ......:'.'',:.' ',,.. . ~ -...: )'-.. . : : ~ )'.: (