Jarvis Creek coal report

Metadata also available as - [Parseable text] - [XML]

Frequently anticipated questions:

What does this data set describe?

Title: Jarvis Creek coal report
Abstract:
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>.
Supplemental_Information: 
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
  1. How should this data set be cited?

    Harun, N.T., and Hendricks, M.D., 2018, Jarvis Creek coal report: Preliminary Interpretive Report PIR 2018-2, Alaska Division of Geological & Geophysical Surveys, Fairbanks, Alaska, United States.

    Online Links:

    Other_Citation_Details: 11 p.

  2. What geographic area does the data set cover?

    West_Bounding_Coordinate: -145.787460
    East_Bounding_Coordinate: -145.747340
    North_Bounding_Coordinate: 63.683440
    South_Bounding_Coordinate: 63.621840

  3. What does it look like?

  4. Does the data set describe conditions during a particular time period?

    Calendar_Date: 2016
    Currentness_Reference: ground condition

  5. What is the general form of this data set?

    Geospatial_Data_Presentation_Form: report, tables

  6. How does the data set represent geographic features?

    1. How are geographic features stored in the data set?

      This is a point data set.

    2. What coordinate system is used to represent geographic features?

      Horizontal positions are specified in geographic coordinates, that is, latitude and longitude. Latitudes are given to the nearest 0.00001. Longitudes are given to the nearest 0.00001. Latitude and longitude values are specified in decimal degrees.

      The horizontal datum used is World Geodetic System of 1984.
      The ellipsoid used is WGS 84.
      The semi-major axis of the ellipsoid used is 6378137.
      The flattening of the ellipsoid used is 1/298.257223563000025.

  7. How does the data set describe geographic features?

    pir2018-2-jarvis-creek-coal-proximate-analysis.csv
    coal proximate analyses (Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and (2005 N. Center Avenue, Somerset, PA))

    sample_id
    identifier assigned by the person who collected the sample (Source: this report)

    string

    latitude
    latitude, WGS84 (Source: this report)

    double

    longitude
    longitude, WGS84 (Source: this report)

    double

    lab_id
    lab identifier (Source: this report)

    string

    collector
    geologist collecting data (Source: this report)

    string

    date
    date data collected (Source: this report)

    date

    analysis_date
    date data analyzed in lab (Source: this report)

    date

    moisture
    all moisture in the coal sample that can be removed by heating in a 107deg.C oven (Source: this report)

    double

    ash
    amount of noncombustible material in sample (Source: this report)

    double

    volatile_matter
    amount of gases (non-water) given off by combustion of sample (Source: this report)

    double

    fixed_carbon
    amount of residual nonvolatile carbon in sample after combustion (Source: this report)

    double

    pir2018-2-jarvis-creek-coal-rock-eval-ro-toc.csv
    Rock-Eval, vitrinite reflectance (Ro), and total organic carbon (TOC) (Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Weatherford Laboratories (Houston, Texas))

    sample_id
    identifier assigned by the person who collected the sample (Source: this report)

    string

    latitude
    latitude, WGS84 (Source: this report)

    double

    longitude
    longitude, WGS84 (Source: this report)

    double

    TOC
    total organic carbon (Source: this report)

    double

    S1
    the amount of free hydrocarbons in the sample (mg of hydrocarbon per gram of rock) (Source: 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) (Source: this report)

    double

    S3
     the amount of CO2  produced during pyrolysis of kerogen. (in milligrams CO2 per gram of rock) (Source: this report)

    double

    TmaxC
    the temperature during pyrolysis where maximum hydrocarbons are released (Source: this report)

    double

    Ro
    vitrinite reflectance (Source: this report)

    double

    HI
    hydrogen index (HI = [100 x S2]/TOC). HI is used to define the origin of organic matter (Source: this report)

    double

    OI
    oxygen index (OI = [100 x S3]/TOC) (Source: this report)

    double

    S2_S3
    S2/S3 (Source: this report)

    double

    S1_TOCX100
    (S1/TOC ) (Source: this report)

    double

    PI
    production index used to determine the maturity of the organic matter. (PI = S1/[S1 + S2]) (Source: this report)

    double

    pir2018-2-jarvis-creek-coal-ultimate-analysis.csv
    coal ultimate analyses, sulfur types, equilibrium moisture, BTU, and coal ranking (Source: Alaska Division of Geological & Geophysical Surveys (DGGS) and Alaska Volcano Observatory)

    sample_id
    identifier assigned by the person who collected the sample (Source: this report)

    string

    latitude
    latitude, WGS84 (Source: this report)

    double

    longitude
    longitude, WGS84 (Source: this report)

    double

    hydrogen
    weight percent of hydrogen in the coal sample (Source: this report)

    double

    carbon
    weight percent of carbon in the coal sample including in volatile matter (Source: this report)

    double

    nitrogen
    weight percent of nitrogen in the coal sample (Source: this report)

    double

    ultimate_sulfur
    measured weight percent of sulfur in coal (Source: 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 (Source: this report)

    double

    ultimate_ash
    amount of noncombustible material in sample (Source: this report)

    double

    sulfate_sulfur
    weight percent of sulfate sulfur in the sample (Source: this report)

    double

    pyritics_sulfur
    weight percent of pyritic sulfur in the sample (Source: 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 (Source: this report)

    double

    equilibrium_moisture
    calculated coal sample moisture level at equilibrium moisture conditions in accordance with ASTM method D1412 (Source: this report)

    double

    BTU
    caloric value of coal is a measure of energy produced from the coal (Source: this report)

    double

    coal_ranking
    coal rank differentiating the stages of coalification (Source: this report)

    string

Who produced the data set?

  1. Who are the originators of the data set? (may include formal authors, digital compilers, and editors)

  2. Who also contributed to the data set?

    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.

  3. To whom should users address questions about the data?

    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays

Why was the data set created?

This Preliminary Interpretive Report presents results from coal quality (proximate and ultimate analysis), Rock-Eval, hydrous pyrolysis, vitrinite reflectance, and kerogen microscopy analyses.

How was the data set created?

  1. From what previous works were the data drawn?

    Bostick, N.H. and Daws, T.A., 1994 (source 1 of 1)
    Bostick, N.H., and Daws, T.A., 1994, Relationships between data from Rock-Eval pyrolysis and proximate, ultimate, petrographic, and physical analyses of 142 diverse U.S. coal samples: null v. 21, p. 35-49, Organic Geochemistry, Amsterdam.

    Online Links:

    • null

    Type_of_Source_Media: paper
    Source_Contribution: Rock-Eval, vitrinite reflectance, and TOC

  2. How were the data generated, processed, and modified?

    Date: 2016 (process 1 of 3)
    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.

    Date: 2017 (process 2 of 3)
    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).

    Date: 2017 (process 3 of 3)
    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

    Data sources used in this process:

    • Bostick, N.H. and Daws, T.A., 1994

  3. What similar or related data should the user be aware of?

How reliable are the data; what problems remain in the data set?

  1. How well have the observations been checked?

    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.

  2. How accurate are the geographic locations?

    Sample locations were collected using hand-held GPS units. Uncertainty associated with the location coordinates is in the range of 1-10 meters.

  3. How accurate are the heights or depths?

  4. Where are the gaps in the data? What is missing?

    This data release is complete.

  5. How consistent are the relationships among the observations, including topology?

    not applicable

How can someone get a copy of the data set?

Are there legal restrictions on access or use of the data?

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.

  1. Who distributes the data set? (Distributor 1 of 1)

    Alaska Division of Geological & Geophysical Surveys
    Metadata Manager
    3354 College Road
    Fairbanks, AK 99709-3707
    USA

    (907)451-5020 (voice)
    (907)451-5050 (FAX)
    dggspubs@alaska.gov

    Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
  2. What's the catalog number I need to order this data set?

    PIR 2018-2

  3. What legal disclaimers am I supposed to read?

    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.

  4. How can I download or order the data?

Who wrote the metadata?

Dates:
Last modified: 14-Sep-2018
Metadata author:
Alaska Division of Geological & Geophysical Surveys
Attn: Simone Montayne
Metadata Manager
3354 College Road
Fairbanks, AK 99709-3707
USA

(907)451-5020 (voice)
(907)451-5050 (FAX)
dggspubs@alaska.gov

Hours_of_Service: 8 am to 4:30 pm, Monday through Friday, except State holidays
Metadata standard:
FGDC Content Standard for Digital Geospatial Metadata (FGDC-STD-001-1998)
Metadata extensions used:

Generated by mp version 2.9.21 on Fri Sep 14 13:43:53 2018