Harun, N.T. Hendricks, M.D. 2018 report, tables Preliminary Interpretive Report PIR 2018-2 Fairbanks, Alaska, United States Alaska Division of Geological & Geophysical Surveys 11 p. http://doi.org/10.14509/30064 In July and August of 2016, the Alaska Division of Geological & Geophysical Surveys (DGGS) conducted a field study in the Jarvis Creek coal field to better characterize these coal deposits. The Jarvis Creek Coal field is located on the north side of the Alaska Range in the Mt. Hayes C-4 quadrangle. It represents the eastern-most coal field in the east-west trending Nenana Coal Province. Located approximately 10 miles southeast of Donnelly Dome, it is bounded on the west by the Delta River, on the east by Jarvis Creek and on the south by Ruby Creek. The field is three to six miles east of the Richardson Highway and is approximately 16 square miles in area. Coal-bearing outcrops of the lower, middle, and upper units were examined in three locations in the Jarvis Creek coalfield. These locations include: 1) north of Ruby Creek, 2) the end of Coal Mine Road near the old Ober Creek mine site, and 3) near Sargent Creek in the northern part of the field. All coal samples were collected as channel samples. Eighteen samples were collected from six stations. This Preliminary Interpretive Report presents results from coal quality (proximate and ultimate analysis), Rock-Eval, hydrous pyrolysis, vitrinite reflectance, and kerogen microscopy analyses. Users can access the complete report and digital data from the DGGS website: http://doi.org/10.14509/30064. This Preliminary Interpretive Report presents results from coal quality (proximate and ultimate analysis), Rock-Eval, hydrous pyrolysis, vitrinite reflectance, and kerogen microscopy analyses. >jarvis-creek-coal-proximate-analysis: coal proximate analyses >jarvis-creek-coal-rock-eval-ro-toc: Rock-Eval, vitrinite reflectance (Ro), and total organic carbon (TOC) >jarvis-creek-coal-ultimate-analysis: coal ultimate analyses, sulfur types, equilibrium moisture, BTU, and coal ranking 2016 ground condition complete None planned -145.787460 -145.747340 63.683440 63.621840 ISO 19115 Topic Category geoscientificInformation Alaska Division of Geological & Geophysical Surveys Analyses Analyses and Sampling Analytical Lab Results Analytical Results Coal Quality Energy Energy Resources Gas Gas Basins Gas Chemistry Geochemistry Geology Hydrocarbon Hydrocarbon Potential Kerogen Lignite Proximate Analyses Pyrolysis Resource Information Resources Rocks Sedimentary Rocks Shale Total Organic Carbon Ultimate Analyses Alaska Division of Geological & Geophysical Surveys Mount Hayes Quadrangle Ober Creek Ruby Creek Sargent Creek Alaska Division of Geological & Geophysical Surveys Jarvis Creek Coal Lignite Creek Formation Suntrana Formation Walker, J.D., Geissman, J.W., Bowring, S.A, and Babcock, L.E., comp., 2012, Geologic Time Scale v. 4.0: Geological Society of America Tertiary This report, map, and/or dataset is available directly from the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys (see contact information below). Any hard copies or published datasets utilizing these datasets shall clearly indicate their source. If the user has modified the data in any way, the user is obligated to describe the types of modifications the user has made. The user specifically agrees not to misrepresent these datasets, nor to imply that changes made by the user were approved by the State of Alaska, Department of Natural Resources, Division of Geological & Geophysical Surveys. The State of Alaska makes no express or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. Alaska Division of Geological & Geophysical Surveys Metadata Manager mailing and physical

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Fairbanks AK 99709-3707 USA (907)451-5020 (907)451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays This work was made possible by the National Coal Resource Data System (NCRDS) program of the USGS as Y17 Studies of Petroleum Source Potential of Alaska Coal. The authors wish to thank Joe East (USGS) for his help. The authors gratefully acknowledge David LePain for help on all aspects of this project. This publication is PRELIMINARY in nature and meant to allow rapid release of field observations or initial interpretations of geology or analytical data. It has undergone limited peer review but does not necessarily conform to DGGS editorial standards. Interpretations or conclusions contained in this publication are subject to change. The procedures used to ensure analytical quality are discussed in the accompanying manuscript. Users will need to contact the originating laboratory for additional detail. not applicable This data release is complete. Sample locations were collected using hand-held GPS units. Uncertainty associated with the location coordinates is in the range of 1-10 meters. Bostick, N.H. Daws, T.A. 1994 null v. 21, p. 35-49 Amsterdam Organic Geochemistry null paper 1994 publication date Bostick, N.H. and Daws, T.A., 1994 Rock-Eval, vitrinite reflectance, and TOC Sample collection - In July and August of 2016, coal-bearing outcrops of the lower, middle, and upper units were examined in three locations in the Jarvis Creek coalfield. These locations include: 1) north of Ruby Creek, 2) the end of Coal Mine Road near the old Ober Creek mine site, and 3) near Sargent Creek in the northern part of the field. All coal samples were collected as channel samples. Eighteen samples were collected from six stations. 2016 Proximate and Ultimate analyses - Geochemical Testing (2005 N. Center Avenue, Somerset, PA) conducted Proximate and Ultimate analyses following the American Society for Testing and Materials standards for coal analyses (ASTM, 2002). 2017 Rock-Eval, vitrinite reflectance, and TOC - Weatherford Laboratories (Houston, Texas) analyzed samples for Rock-Eval and vitrinite reflectance (Ro) (table 3). Unfortunately, total organic carbon (TOC) was not measured on any of the samples. Bostick and Daws (1994) showed a close correlation between TOC and "dry basis" carbon from ultimate analysis in low-rank coals (less than 0.8% Ro max). The Jarvis Creek coals are low-rank, so "dry basis" carbon from ultimate analysis was used as a proxy for TOC Bostick, N.H. and Daws, T.A., 1994 2017 point 0.00001 0.00001 decimal degrees World Geodetic System of 1984 WGS 84 6378137 298.257223563000025 pir2018-2-jarvis-creek-coal-proximate-analysis.csv coal proximate analyses Alaska Division of Geological & Geophysical Surveys (DGGS) and (2005 N. Center Avenue, Somerset, PA) jarvis-creek-coal-proximate-analysis sample_id identifier assigned by the person who collected the sample this report string latitude latitude, WGS84 this report double longitude longitude, WGS84 this report double lab_id lab identifier this report string collector geologist collecting data this report string date date data collected this report date analysis_date date data analyzed in lab this report date moisture all moisture in the coal sample that can be removed by heating in a 107deg.C oven this report double ash amount of noncombustible material in sample this report double volatile_matter amount of gases (non-water) given off by combustion of sample this report double fixed_carbon amount of residual nonvolatile carbon in sample after combustion this report double pir2018-2-jarvis-creek-coal-rock-eval-ro-toc.csv Rock-Eval, vitrinite reflectance (Ro), and total organic carbon (TOC) Alaska Division of Geological & Geophysical Surveys (DGGS) and Weatherford Laboratories (Houston, Texas) jarvis-creek-coal-rock-eval-ro-toc sample_id identifier assigned by the person who collected the sample this report string latitude latitude, WGS84 this report double longitude longitude, WGS84 this report double TOC total organic carbon this report double S1 the amount of free hydrocarbons in the sample (mg of hydrocarbon per gram of rock) this report double S2 the amount of hydrocarbons that are produced through the thermal cracking process. An indicator of generation potential (mg of hydrocarbon per gram of rock) this report double S3  the amount of CO2  produced during pyrolysis of kerogen. (in milligrams CO2 per gram of rock) this report double TmaxC the temperature during pyrolysis where maximum hydrocarbons are released this report double Ro vitrinite reflectance this report double HI hydrogen index (HI = [100 x S2]/TOC). HI is used to define the origin of organic matter this report double OI oxygen index (OI = [100 x S3]/TOC) this report double S2_S3 S2/S3 this report double S1_TOCX100 (S1/TOC ) this report double PI production index used to determine the maturity of the organic matter. (PI = S1/[S1 + S2]) this report double pir2018-2-jarvis-creek-coal-ultimate-analysis.csv coal ultimate analyses, sulfur types, equilibrium moisture, BTU, and coal ranking Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory jarvis-creek-coal-ultimate-analysis sample_id identifier assigned by the person who collected the sample this report string latitude latitude, WGS84 this report double longitude longitude, WGS84 this report double hydrogen weight percent of hydrogen in the coal sample this report double carbon weight percent of carbon in the coal sample including in volatile matter this report double nitrogen weight percent of nitrogen in the coal sample this report double ultimate_sulfur measured weight percent of sulfur in coal this report double ultimate_oxygen total oxygen in weight percent as calculated as the remaining major elemental value from subtraction of the other major elements and ash this report double ultimate_ash amount of noncombustible material in sample this report double sulfate_sulfur weight percent of sulfate sulfur in the sample this report double pyritics_sulfur weight percent of pyritic sulfur in the sample this report double organic_sulfur weight percent of organic sulfur in the coal matrix as calculated by the difference in total sulfur minus elemental and inorganic sulfur this report double equilibrium_moisture calculated coal sample moisture level at equilibrium moisture conditions in accordance with ASTM method D1412 this report double BTU caloric value of coal is a measure of energy produced from the coal this report double coal_ranking coal rank differentiating the stages of coalification this report string Alaska Division of Geological & Geophysical Surveys Metadata Manager mailing and physical

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Fairbanks AK 99709-3707 USA (907)451-5020 (907)451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays PIR 2018-2 The State of Alaska makes no expressed or implied warranties (including warranties for merchantability and fitness) with respect to the character, functions, or capabilities of the electronic data or products or their appropriateness for any user's purposes. In no event will the State of Alaska be liable for any incidental, indirect, special, consequential, or other damages suffered by the user or any other person or entity whether from the use of the electronic services or products or any failure thereof or otherwise. In no event will the State of Alaska's liability to the Requestor or anyone else exceed the fee paid for the electronic service or product. DGGS publications are available as free online downloads or you may purchase paper hard-copies or digital files on CD/DVD or other digital storage media by mail, phone, fax, or email from the DGGS Fairbanks office. To purchase this or other printed reports and maps, contact DGGS by phone (907-451-5020), e-mail (dggspubs@alaska.gov), or fax (907-451-5050). Payment accepted: Cash, check, money order, VISA, or MasterCard. Turnaround time is 1-2 weeks unless special arrangements are made and an express fee is paid. Shipping charge will be the actual cost of postage and will be added to the total amount due. Contact us for the exact shipping amount. Contact DGGS for current pricing rock-eval-toc http://doi.org/10.14509/30064 Free download 20180914 Alaska Division of Geological & Geophysical Surveys Simone Montayne Metadata Manager mailing and physical

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Fairbanks AK 99709-3707 USA (907)451-5020 (907)451-5050 dggspubs@alaska.gov 8 am to 4:30 pm, Monday through Friday, except State holidays FGDC Content Standard for Digital Geospatial Metadata FGDC-STD-001-1998 If the user has modified the data in any way they are obligated to describe the types of modifications they have performed in the supporting metadata file. User specifically agrees not to imply that changes they made were approved by the Alaska Department of Natural Resources or Division of Geological & Geophysical Surveys. http://www.dggs.alaska.gov/metadata/dggs.ext dggs metadata extensions