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Home My WebLink AboutGMC Data Report No. 273 Lithographic description of skeletonized core samples from 8 holes received at the GMC (1 box, holes Nl through N8) of the INEXCO Mining Company Nikolai Project, McCarthy, Alaska that consist of core samples of the Nikolai Greenstone and the basal Chitistone Limestone. ~~ GE~Ozo '~ ~ ~ / <;:r::) 0 $?¡ALS Received 5 September 1996 Total of 4 pages in report Alaska Geologic Materials Center Data Report No. 273 ..... .\\~ j/ " .1Y~ ..'. 30 ~~,pt·~, 1972 .- . '" h .Þ14 'INEXCO Mr. ~Tim Murphy:, Enclosed are èeveral r~presentative,samples of the core from tæ Nikolai Pro,1ect, McCarthy, Alaska., These samples' ine lu~e 'the Nikolai GreenstoJ;le (2) ,basal bed;/Ghi t istone ~Jimestod:é'¡ (1), and the fau'l't;'; Zone' (2) found 'near' the'cont~ct . ' L . .~...", " '. \ of the:Çhitistone JLimestone )~nd the Nikolai 'Greenstone in . ' hole N7, The rest ,of' the s~.m'Oles are representative of thema',i6r r?,9k tYDes found a:"hove theb~sal bed of the ,~.. . Chitist6'ne Limestone. ,They were,. selected because they showed evidénce of faulting~ mineralization, graphite like , . c'arbon ma.terial, or mineralized mudstone or sandstone. .'While these ,ropks do represent a large portion of the core they are not a complete samp.ling. Also encroosed 1's a 'brief discriptiort of rock type, its position in relation to the Chitistone-Nikolai contact,. 'and what I believe the sample,s re~r~sent. I hope these sa~ples will be helpful to yo~. ~ ~' Sincerely, B~ ¡.4~ Ba.rry Hoffmann," r~ . GMC Data Report No,. 273 INEXCO MINING COMPANY 1009 MENDENHALL APARTMENTS JUNEAU, ALASKA 99801 (907),586-1383 A WHOLLY OWNED SUBSIDIARY OF INEXCO OIL COMPANY OFFICES: CALGARY, CASPER, DENVER, HOUSTON, JUNEAU, ":'IDLAND, NEW ORLEANS, OKLAHOMA CiTY, NEW YORK" , -, ,.. ..~ ',' , , . 'I i . . / . I'" :'~:' . 'I,t' , Page 1/4 page 1 Nl, 940': ~O' above the contact of the Chitistone-Nîkolai. A dark gray limestone with large pyrite crystals. This is part of the basal bed of the Chitistone Limestone. Nl, 994': 10' below the Nikolai-Chitistone contact. An altered basalt with calcite and epidote veinlets and ammudual fillings. N3, 425': 440' above the Chitistone-Ni.kolai contact. Large white crystals of caleite found in a fracture zone.. This zone was 10' long in the drill core. N3,8855': 440' above the Chitistone-Nikolai contact. Blue gray mudstone with 2-10~~; pyrite 8nd a small amount of chalcopyrite. N3,483': ._0' above t~ Chitlstone-Nikolai contact. A fractured fine grained dolomite with crystals of calcite filling the space between dolomite fragments. Black carbon material and pyrite is found along fractures and crystal faces. N3, ,36': 440' above the Chitistone-Nikolai contact. A fault zone with dolomite fragments" cla.y ga,uge and large cald te crystals. Vugs and unfilled fraetureø are cÓ,mmon. N2, 889': 220' above the Chitistone-Nikolai contaet. :EPine grained dolomite with small fractured areas. ftI:e angular fragments are dolomite and the matrix is small calcite crystals. N3,793': 440' above the Chitistone-Nikolai contact. A fine grained limestone and a blue gray mudstone. Pyrite is concehtra.ted a,t the limèstone-mu4stone contact. The limestone shows irregular bedding. N2,832': 230' above the Chitistone-Nikolai rontact. Dolomite with black carbon material and pyrite alon~ fractures. N5,'445': ~530' above the Chitistone-Nikolai contact. A fractured dolomite with black carbon material and calcite making up the filling between th e fragments. N6, 858': greater than 160' above the Chitistone-Nikolai contact. ~ypieal dolomite with black carbon material and pyrite. Copper staining (chalcopyrite and bornite) is found on some surfaces. N4, 200': 650' above the Chitistone-Nikolai contact. A fbactured dolomite with caleite filling. Relagar and pyrite are found on facture surfaces. N7, 828': $' above the Chitistone-Nikolai contact. A fractured altered basalt with l~ pyrite. This is part of the intense fault zone found at the base of the l'imestone. N7,840': 3' below the Nikolai-Chitistone contact. A basalt with calcite fJilling ammuduals. GMC Data Report No. 273 Page 2/4 page 2 N4, 406': ..-v64 0 , above the Chitistone-Nikolai contact. ,A fine to , eoarse grained chert and limestone-dolomite sandstone from the dolomite portion of N4. Minor pyrite is present. N7, 836':$~ above the Chltistone-Nikolai contact. Part of the intense breccia zone at the base of N7. Fragments of tœ basal bed of fue Chitistone timestone and Nikolai Greenstone are in a matrix of grou.nd limestone and greenstone. 10% or more pyrite can be present. N6, 897': greater than 130' above the œfu~è!~~n8e-Nikolai contact. Dolomite with black carbon material. and calcite. N6, 833': grea.,ter than 150' above the Chitistone-Nikolai contact. A fine graIned dolomite with black graphite like carbon material. N8, 223': 1\..1400' above the Ghitistone-Nikolai contact. Fractured dolomite with calcite and black carbon matrix. 1'14,304': 680' above the Chitistone-Nikolai contact. Bedded fine grained sandstone and shale from the limestone portion of N4. 5% pyrite is found in the sandstone. N8, 235': 380' above the Chitistone-Nikolai contact.Fractured dolomite with calcite matrix. Pyrite is present as is evidence of alteration a~ mineralization. N4, 572': '660' above the Chitistone-Nikolai contact. Black limestone and chert ,from the ammonite zone of the Chitistone Limestone. N4, 20~': v650' above fue Chitistone-Nikolai contact. Fractured dolomite with ealcite similar to N4, 200 except pyrite is common. GMC Data Report No. 273 Page 3/4 CRC CORE TRANSMITTAL File Number: 1345 patron ID: 871 Req. By: MILTON WILTSE Company: ALASKA GEOLOGICAL SURVE,Y Ship ~Q: DR. JOHN REEDER, CURATOR ~ ALASKA GEOLOGIC MATERIALS CTR. ~ DIV. GEOL.' & GEOPHYS. SURVEYS STATE DEPT. NARURAL RESOURCES 18205 FISH HATCHERY. ROAD EAGLE RIVER, AK 99577-2805 ~:;~~~xt Special Comments: Code: I Date Requested: 03-jul-1996 Date Needed: 15-aug-1996 Date Due: N/A Destination: SHIPPING Other Services Requested: N/A Charges: N/A City: Phone: +--------+----------+------------+---~-------------------+-----+-------+-------+ lAce * I County 1 Operator I Lease IBoxeslTop IBottom 1 +========+==========+============+=======================+=====+=======+=======+ IB00941 KODIAK SHE SUN OIL CO. IKSSD *3 1 1490.01 5330.01 , I B00942 KODIAK SHE SUN OIL CO. I KSSD '2 1 1500.0110460.01 A!n,~ .:$/..,ø-t"J C01816 KENAI, AK· ASHLAND PETR I WEST CHANNEL *1-03 7 9235.0 I 9273.01"- ._...~._,-_..._,_m·~).IC02378 MCCARTHY INEXCO INIKOLAI PROJECT 1 200.01 994.0,~~ ¡{},,>~5~IR48370 KENAI,1\K ASHLAND EXPLIWEST CHANNEL 1-03 6 3013.01 9540.01- IR48484 KENAI, AK TENNECO OIL ISTATE *36465-1 13 2550.0113960.0I'~ 1 RS 7008 OFF SHORE, UNKNOWN IE. C . 100 5 .&l-O-~--e-+-:l'6"(}-4'"6·~~0l""'.1JD IRS7012 OFFSHORE, ARCO ICOST #1 4 1500.01 5150.01 ( IR57013 KODIAK SHE ARCO IKODIAK STRAT. TEST *2 2 1290.01 4307.01? IR57022 UNKNOWN, A COLORADO OILIYAKUTAT *2 (X-5896) 4 50.0111750.01- IRS7023 UNKNOWN, A COLORADO OILIYAKUTAT *1 1 110.01 9315.0r- IRS7028 OFFSHORE, SUN OIL CO. ICOST *2-B (E C-100) 2 9430.0113454.01? +--------+----------+------------+-----------------------+-----+-------+-------+/ +------------------+ ITotal Boxes: 471 +------------------+ Received by: \l~ Á~ ~. !?,O~j)~.:J Curator's Signature: ~, '~A!.~:~Á- / Please return a signed copy of this transmittal to: Date: ,,-- '5" ./ 9 " ." /~-'t ""',? ~~~'- " ;1'/' ..- . ,yZ¿,,,,, . " (..) .. "/ Date: Bureau of Economic Geology Core Research Center J.J. Pickle Research Campus 10100 Burnet Road Bldg *131 Austin, Texas 78758-4497 (512) 471-0402 ATTN: James Donnelly ~:-,¿/::~~¿ 4~ .<'~ " GMC Data Report No. 273 Page 4/4