Identification_Information: Citation: Citation_Information: Originator: LePain, D.L. Originator: Kirkham, Russell Publication_Date: 2015 Title: Rock-eval pyrolysis, vitrinite reflectance, and kerogen microscopy results from Miocene carbonaceous mudstones and coals in outcrop, McGrath Quadrangle, southwestern Alaska Geospatial_Data_Presentation_Form: report and digital data Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 2015-3 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 60 p., 1 sheet. Online_Linkage: http://dx.doi.org/10.14509/29406 Description: Abstract: The Cenozoic Holitna basin is a gravity-defined feature that sits astride the Denali-Farewell fault zone in southwestern Alaska. The basin corresponds to a gravity low in excess of -40 milligals (mGals). No outcrops exist within the footprint of the gravity low and no subsurface data are available; consequently, the stratigraphy and age of its fill are unknown. The Alaska Division of Geological & Geophysical Surveys (DGGS) investigated the shallow gas potential of the basin during the summers of 2000 and 2002 by studying Tertiary coal-bearing rocks exposed along the Denali-Farewell fault zone to the northeast of the basin in the southern McGrath Quadrangle as an outcrop analog to the subsurface stratigraphy of the basin. We visited exposures along Windy Fork Middle Fork River to collect samples for source-rock characterization, including Rock-Eval pyrolysis, vitrinite reflectance measurements, and visual kerogen analysis. Rock-Eval pyrolysis results from carbonaceous mudstone and coal samples along Windy Fork indicate the presence of Type II and Type III kerogen, which are expected to be excellent sources of oil and gas under favorable subsurface conditions. Available thermal maturity data for the samples indicate they are immature for oil and gas, but are in the late pre-oil phase of maturity. If a coal- and carbonaceous-mudstone-bearing succession similar to the rocks discussed in this report from the McGrath Quadrangle are present in the subsurface of the gravity-defined Holitna basin at favorable depths, they can be expected to have significant thermogenic oil and gas generative potential. Purpose: This dataset provides source-rock characterization results (Rock-Eval pyrolysis, vitrinite reflectance measurements, and visual kerogen analysis) from outcrop exposures along Windy Fork Middle Fork River. Supplemental_Information: >rock-eval-toc: Summary of mean vitrinite reflectance, total organic carbon (TOC), and Rock-Eval pyrolysis data Time_Period_of_Content: Time_Period_Information: Range_of_Dates/Times: Beginning_Date: 2002 Ending_Date: 2015 Currentness_Reference: ground condition Status: Progress: complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -154.1718 East_Bounding_Coordinate: -154.13548 North_Bounding_Coordinate: 62.4190 South_Bounding_Coordinate: 62.40706 Keywords: Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Category Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Theme_Keyword: Coal Theme_Keyword: Pyrolysis Theme_Keyword: Rock-Eval Pyrolysis Theme_Keyword: Vitrinite Theme_Keyword: Resources Theme_Keyword: Energy Place: Place_Keyword_Thesaurus: Alaska Division of Geological & Geophysical Surveys Place_Keyword: McGrath Quadrangle Temporal: Temporal_Keyword_Thesaurus: 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 Temporal_Keyword: Carboniferous Temporal_Keyword: Miocene Access_Constraints: 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). Use_Constraints: 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. Point_of_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Position: GIS Manager Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Electronic_Mail_Address: dggsgis@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Data_Set_Credit: The work summarized in this report was funded by the State of Alaska. We gratefully acknowledge Calista Corporation for their support of this work. We thank Rick Stanley for discussions regarding the petroleum source potential of coal and for reviewing a draft of this manuscript. Cross_Reference: Citation_Information: Originator: Burns, L.E. Originator: SIAL Geosciences, Inc. Originator: On-line Exploration Services, Inc. Publication_Date: 2008 Title: Linedata and gridded data for the aeromagnetic survey of the Holitna basin area, western Alaska: Parts of the Lime Hills and Sleetmute quadrangles Series_Information: Series_Name: Geophysical Report Issue_Identification: GPR 2008-4 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 DVD Online_Linkage: http://dx.doi.org/10.14509/16681 Cross_Reference: Citation_Information: Originator: DGGS Staff Originator: On-line Exploration Services, Inc. Originator: SIAL Geosciences, Inc. Publication_Date: 1998 Title: Total field magnetics and flight line paths of the Holitna Basin area, western Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-27 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 4 sheets, scale 1:125,000 Online_Linkage: http://dx.doi.org/10.14509/1853 Cross_Reference: Citation_Information: Originator: DGGS Staff Originator: On-line Exploration Services, Inc. Originator: SIAL Geosciences, Inc. Publication_Date: 1998 Title: Total field magnetics of the Holitna Basin area, western Alaska Series_Information: Series_Name: Report of Investigation Issue_Identification: RI 98-14 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 2 sheets, scale 1:125,000 Online_Linkage: http://dx.doi.org/10.14509/2589 Cross_Reference: Citation_Information: Originator: Edcon, Inc. Publication_Date: 2001 Title: Edcon land gravity survey, Holitna Basin, southwest Alaska Series_Information: Series_Name: Geophysical Report Issue_Identification: GPR 2001-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 1 DVD Online_Linkage: http://dx.doi.org/10.14509/2725 Cross_Reference: Citation_Information: Originator: LePain, D.L. Originator: Blodgett, R.B. Originator: Clough, J.G. Originator: Ryherd, T.J. Originator: Smith, T.N. Publication_Date: 2000 Title: Generalized stratigraphy and petroleum potential of the Holitna region, southwest Alaska Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2000-1 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 34 p., 1 sheet, scale 1:250,000 Online_Linkage: http://dx.doi.org/10.14509/2665 Cross_Reference: Citation_Information: Originator: LePain, D.L. Originator: Blodgett, R.B. Originator: Clough, J.G. Publication_Date: 2003 Title: Sedimentology and hydrocarbon source rock potential of Miocene-Oligocene strata, McGrath Quadrangle: An outcrop analog for the Holitna Basin Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2002-5 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 75 p Online_Linkage: http://dx.doi.org/10.14509/2870 Cross_Reference: Citation_Information: Originator: SIAL Geosciences, Inc. Originator: On-line Exploration Services, Inc. Publication_Date: 1998 Title: Project report of the aeromagnetic survey for the Holitna Basin area, western Alaska Series_Information: Series_Name: Public Data File Issue_Identification: PDF 98-29 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 82 p., 2 sheets, scale 1:125,000 Online_Linkage: http://dx.doi.org/10.14509/1854 Cross_Reference: Citation_Information: Originator: Tyler, Roger Originator: Scott, A.R. Originator: Clough, J.G. Publication_Date: 2000 Title: Coalbed methane potential and exploration targets for rural Alaska communities Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2000-2 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 169 p Online_Linkage: http://dx.doi.org/10.14509/2733 Cross_Reference: Citation_Information: Originator: Zippi, P.A. Publication_Date: 2001 Title: Palynology of Tertiary Holitna outcrops, McGrath and Talkeetna quadrangles Series_Information: Series_Name: Preliminary Interpretive Report Issue_Identification: PIR 2001-4 Publication_Information: Publication_Place: Fairbanks, Alaska, United States Publisher: Alaska Division of Geological & Geophysical Surveys Other_Citation_Details: 22 p Online_Linkage: http://dx.doi.org/10.14509/2736 Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: This DGGS Report of Investigations is a final report of scientific research. It has received technical review by several scientists familiar with the subject matter. Uncertainties associated with the depiction or interpretation of various analytical values are discussed in the accompanying manuscript. Logical_Consistency_Report: not applicable Completeness_Report: This DGGS Report of Investigations is a final report of scientific research. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Samples 02DL054A-F were grab samples collected within a 5 meter radius of the reported location coordinates. Samples with the 02DL53 prefix were collected along a measured section. Location coordinates are provided for the base of the section. The numeric suffix of each of the sample numbers indicates the the distance, in meters, from the base of the section. Lineage: Process_Step: Process_Description: Fieldwork - We measured a stratigraphic section along the north end of the Windy Fork River exposure and collected an extensive suite of samples suitable for Rock-Eval pyrolysis from mudstones, carbonaceous mudstones, and coals (fig. 3, on sheet). Grab samples for Rock-Eval were also collected south of locality 02DL53, a short distance north of the mapped trace of the Farewell fault, at locality 02DL54. More information can be found in the accompanying report. Process_Date: 2002 Process_Step: Process_Description: Analysis - Samples were analyzed by Baseline-DGSI for mean vitrinite reflectance, total organic carbon (TOC), and Rock-Eval pyrolysis. Process_Date: 2002 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: point Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Geographic: Latitude_Resolution: 0.0001 Longitude_Resolution: 0.00001 Geographic_Coordinate_Units: decimal degrees Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.9786982 Entity_and_Attribute_Information: Detailed_Description: Entity_Type: Entity_Attribute_Layer_Name: rock-eval-toc Entity_Type_Label: ri2015-3-rock-eval-toc.csv Entity_Type_Definition: Summary of mean vitrinite reflectance, total organic carbon (TOC), and Rock-Eval pyrolysis data Entity_Type_Definition_Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Baseline-DGSI Attribute: Attribute_Label: LONGITUDE Attribute_Definition: Longitude, NAD27 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: -154.1718 Range_Domain_Maximum: -154.13548 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: LATITUDE Attribute_Definition: Latitude, NAD27 Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 62.40706 Range_Domain_Maximum: 62.419 Attribute_Units_of_Measure: decimal degrees Attribute: Attribute_Label: SAMPLE Attribute_Definition: Label assigned in the field to identify the sample. Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Generic example of a sample identifier: YYAA9999X or YYAA99-99; YY=last two digits of year, AA=geologist's initials (one to three characters), 9999=unique station number, X= optional alpha character which indicates that multiple samples were collected at a given location, -99= distance in meters from base of measured section. Attribute: Attribute_Label: FIELD_LITHOLOGY Attribute_Definition: Lithology assigned to the sample when it was collected in the field Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Possible values: carbonaceous claystone, carbonaceous claystone and siltstone, carbonaceous claystone or high-ash coal, coal, coal with carbonaceous claystone partings, coal with interbedded carbonaceous claystone splits, heterolithic - clayey siltstone and carbonaceous claystone, heterolithic - siltstone and carbonaceous claystone, heterolithic - siltstone, carbonaceous claystone, and coal, heterolithic - siltstone, carbonaceous claystone, coal, heterolithic - siltstone, carbonaceous claystone, coal stringers, no field assigned lithology, nodular siltstone, siltstone, siltstone and carbonaceous claystone, or siltstone with coal stringers; Attribute: Attribute_Label: TOC_BASED_LITHOLOGY Attribute_Definition: Revised lithology assignment, modifications incorporate the total organic carbon (TOC) values Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Possible values: carbonaceous claystone, coal, carbonaceous siltstone, carbonaceous siltstone/claystone, carbonaceous mudstone, or mudstone Attribute: Attribute_Label: MEAN_VR Attribute_Definition: Mean vitrinite reflectance Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.42 Range_Domain_Maximum: 0.59 Attribute_Units_of_Measure: %Ro Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: NULL or blanks indicate that the measurement was not applicable Enumerated_Domain_Value_Definition_Source: Baseline-DGSI Attribute: Attribute_Label: TOC_WT_PCT Attribute_Definition: Total organic carbon (TOC) Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 1.11 Range_Domain_Maximum: 74.35 Attribute_Units_of_Measure: weight% Attribute: Attribute_Label: S1 Attribute_Definition: Amount of hydrocarbons volatilized from the sample by heating to 300 degrees C and represents the hydrocarbons in the sample at the start of the procedure Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.03 Range_Domain_Maximum: 3.05 Attribute_Units_of_Measure: mg/g Attribute: Attribute_Label: S2 Attribute_Definition: Measure of the hydrocarbons generated by pyrolytic degradation of kerogen (cracking) by heating from 300 degrees C to 550 degrees C in 25 degrees C per minute increments. S2 represents the generative potential remaining in the sample. Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.49 Range_Domain_Maximum: 156.89 Attribute_Units_of_Measure: mg/g Attribute: Attribute_Label: S3 Attribute_Definition: Measure of the carbon dioxide generated during S2 heating up to 390 degrees C Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.51 Range_Domain_Maximum: 12.81 Attribute_Units_of_Measure: mg CO2/g rock Attribute: Attribute_Label: TMAX Attribute_Definition: Temperature of maximum S2 generation Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 406 Range_Domain_Maximum: 439 Attribute_Units_of_Measure: degrees C Attribute: Attribute_Label: HI Attribute_Definition: Hydrogen index (HI = S2/TOC) Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 44 Range_Domain_Maximum: 312 Attribute: Attribute_Label: OI Attribute_Definition: Oxygen index (OI = S3/TOC) Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 7 Range_Domain_Maximum: 82 Attribute: Attribute_Label: S1_TOC Attribute_Definition: Ratio (S1/TOC)x100 Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 2 Range_Domain_Maximum: 9 Attribute: Attribute_Label: PI Attribute_Definition: Production index Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.01 Range_Domain_Maximum: 0.11 Attribute: Attribute_Label: S2_S3 Attribute_Definition: Ratio (S2/S3) Attribute_Definition_Source: Baseline-DGSI Attribute_Domain_Values: Range_Domain: Range_Domain_Minimum: 0.5 Range_Domain_Maximum: 36.3 Attribute: Attribute_Label: NOTES Attribute_Definition: a brief sample or station description Attribute_Definition_Source: Alaska Division of Geological & Geophysical Surveys Attribute_Domain_Values: Unrepresentable_Domain: Characters 1 to 254 of a brief sample or station description. Attribute_Domain_Values: Enumerated_Domain: Enumerated_Domain_Value: NULL Enumerated_Domain_Value_Definition: We do not provide notes or additional descriptive information about the sample or station. Enumerated_Domain_Value_Definition_Source: Alaska Division of Geological & Geophysical Surveys Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: Alaska Division of Geological & Geophysical Surveys Contact_Address: Address_Type: mailing and physical Address: 3354 College Road City: Fairbanks State_or_Province: AK Postal_Code: 99709-3707 Country: USA Contact_Voice_Telephone: (907)451-5020 Contact_Facsimile_Telephone: (907)451-5050 Contact_Electronic_Mail_Address: dggspubs@alaska.gov Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays Contact_Instructions: Please view our website (http://www.dggs.alaska.gov) for the latest information on available data. Please contact us using the e-mail address provided above when possible. Resource_Description: RI 2015-3 Distribution_Liability: 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. Standard_Order_Process: Non-digital_Form: 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. 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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. Metadata_Extensions: Online_Linkage: http://www.dggs.alaska.gov/metadata/dggs.ext Profile_Name: dggs metadata extensions