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Identification Information
Title: Mineral Occurrence data for the Eocene Green River Formation in the Piceance and Uinta Basins
Originator: Ronald C. Johnson, Justin E. Birdwell, Tracey J. Mercier, and Michael E. Brownfield
Publication Place: Denver, Colorado
Publisher: U.S. Geological Survey, Central Energy Resources Science Center
Publication Date: 2016
Landing Page or Download(.zip):
Landing Page or Download(.zip):
Abstract: This legacy database lists occurrences of minerals identified in the Green River Formation in the Uinta and Piceance Basins, Utah and Colorado using X-ray diffraction (XRD). The database was compiled from data collected by the U.S. Geological Survey (USGS) and former U.S. Bureau of Mines (USBM). The database includes 1200 samples from 14 cores in the Uinta Basin and 9443 samples from 30 cores in the Piceance Basin; within that dataset over 40 mineral phases are represented between the two basins. Quartz, dolomite, and feldspars are the most common minerals. For nearly a century, these two agencies conducted extensive research on the oil shale deposits of the Eocene Green River Formation, Utah, Colorado, and Wyoming. Beginning in the early 1950s, this research included XRD mineral identification analysis from core and cuttings samples taken to assess oil shale resources.
Supplemenatal Information: None
Purpose: These data were digitized for the following purposes: (1) to preserve legacy data on two important resource basins containing oil shale, petroleum (oil and tar sands), aluminum (dawsonite) and sodium bicarbonate (nahcolite) resources; (2) for research into the geochemical variations between and within the two basins to better understand the history of the Green River lacustrine system; (3) to assess co-occurrences of various minerals in order to better understand the geochemistry of the lake and oil shale resource; and (4) to compare with other XRD mineralogy datasets collected on the Piceance and Uinta basin oil shales.
Progress: Completed
Frequency: Not planned
Time Period of Content
Single Date
Date: unknown
Currentness: ground condition
West Bounding Longitude: -111.9
East Bounding Longitude: -106.5
North Bounding Latitude: 40.8
South Bounding Latitude: 38.1
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Point of Contact
Contact Position: Geochemist
Address Type: mailing and physical address
Address: W 6th Ave Kipling St 977
City: Lakewood
State: Colorado
Postal Code: 80225
Telephone: 303-236-1534
Fax: 303-236-3202
Browse Graphic
Browse Graphic URL:
Browse Graphic Caption: Browse Graphic
Browse Graphic Type: PNG
Access: None
Use: This mineralogy data represents mineral occurrences only and does not reflect concentrations or abundances. Any comments compiled with the occurrence information that indicates dominant mineral phases represent the interpretation of a geologist or peak height notations made by the XRD analyst.
Theme Keywords
Theme Reference: None
Theme Topics: Mineralogy, occurrence, lacustrine, saline minerals, oil shale
Theme Reference: EnergyResourceActivities
Place Keyword Thesaurus: None
Place Keyword: Green River Formation, colorado, Utah
Data Quality Information
Logical Consistency Report: No formal logical accuracy tests were conducted.
Completeness Report: Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details.
Processing Steps
Step 1 Process Description: All of the data presented here was collected during the 1970s and early 1980s, prior to the end of the oil shale boom. The great majority of the data is from samples collected from core. These samples include: (1) samples collected from a core that represented interesting or representative lithologies, or (2) ground samples collected for Fischer assay. The top depth of the assessed interval in which the sample was collected is included for each sample. This depth was included so that variations in mineralogy in relation to Fischer assay oil yields can be easily studied. If depth assay and depth actual are the same, the XRD analysis was most likely performed on a portion of the Fischer assay sample. The typical sampling interval was either < 2 feet (49% of samples) or between 5 and 10 feet (24% of samples). In a few cases, the interval between one sample and the next was between 50 and 100 feet (~3% of samples), excluding gaps where core was not collected. Analyses of rotary cuttings sample were included when upper or lower parts of the coreholes were rotary drilled, and XRD data was run on cuttings from these intervals. In some cases lists of XRD results did not include any sample descriptions, but a general description for the core was located. In those cases, the core descriptions were matched to the sample depths. In many cases a single core description covered the interval for several samples. In those cases, the same core description was repeated for all the samples listed in the spreadsheet in that interval. Data was compiled from hard copies of USGS and USBM reports and data sheets stored in the facilities of the USGS Central Energy Resources Science Center. Notations included on many of the data sheets digitized herein indicated that the data had been previously digitized. Unfortunately, data digitized by the USGS during the early 1980s and earlier was stored on media that are either degraded to a point that they are no longer readable or the necessary hardware or software to read the data is not available. The USBM was disbanded in 1996, and any data stored on their computers is not accessible. Thus, this database was constructed using paper copies of: (1) original XRD traces that included mineral identifications, (2) unpublished USBM core descriptions that included XRD mineral identifications, (3) hand written lists of sample depths and minerals identified. No revisions of mineral identifications were made. Some of the data sets included variations in peak heights. This information is not included here in part due to the number of traces with peaks that plotted off chart and therefore peak heights could not be accurately determined.
Step 1 Process Date: Unknown
Entity And Attribute Information
Overview: Column A: Contains information on the core from which the data was collected (core numbers following the notation in the USGS Oil Shale Assessment database). At the beginning of each core dataset in column A, the township/range/section information for the core is provided. Additional information can be found in the Oil Shale Assessment database and related reports using the core number (e.g., C0174 or U0053). Columns B and C: Two sample depths are given: (1) depth assay (column C), and depth actual (column D). Depth actual is the top of the actual sample interval. Depth assay is the top of the assayed Fischer assay interval in which the sample occurs. Fischer assay depths are from the Oil Shale Assessment database reports. The Fischer assay intervals are included in order to facilitate comparisons between mineral occurrences and Fischer assay analysis. Column D: This column provides the stratigraphic interval within the Green River oil shale based on the rich and lean zone stratigraphy of Cashion and Donnell (1972). These intervals are well correlated throughout the Piceance and Uinta basins. Columns E through AL (Piceance) and E through AS (Uinta): Mineral species or categories in the USGS and USBM mineralogy datasets. An “x” indicates that the mineral listed in Row 1 of the column was present in the sample collected from the depth indicated by the sample row (see above) based on interpretation of the XRD trace generated on that sample. Columns AM (Piceance) and AT (Uinta): Comments compiled from sample descriptions in data sheets or from general descriptions of the core. At the end of the list of samples for each dataset, the total number of samples (based on the total number of sample depths) is calculated, along with the total number of samples containing each mineral type or category and the percentage of the total number of samples in which that mineral occurred.
Detail Citation: None
Distribution Information
Resource Description: Downloadable Data
Distribution Liability: Although these data have been processed successfully on a computer system at the U.S. Geological Survey, no warranty expressed or implied is made regarding the display or utility of the data on any other system, or for general or scientific purposes, nor shall the act of distribution constitute any such warranty. The U.S. Geological survey shall not be held liable for improper or incorrect use of the data described and/or contained herein. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this information product, for the most part, is in the public domain, it also contains copyrighted materials as noted in the text. Permission to reproduce copyrighted items for other than personal use must be secured from the copyright owner. These data have been approved for release and publication by the Director of the USGS. Although this database has been subjected to rigorous review and is substantially complete, the USGS reserves the right to revise the data pursuant to further analysis and review. Furthermore, it is released on condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use.
Organization: USGS Information Services
Address Type: mailing address
Address: Box 25286 Denver Federal Center
City: Denver
State: Colorado
Postal Code: 80225
Telephone: 1-888-ASK-USGS
Fax: 303-202-4693
Metadata Reference Information
Metadata Creation Date: 20141008
Organization: U.S. Geological Survey, Central Energy Resources Science Center
Person: Christopher P. Anderson
Contact Position: GIS Analyst (contractor)
Address Type: mailing and physical address
Address: U.S. Geological Survey, Box 25046, MS 939, Denver Federal Center
City: Denver
State: Colorado
Postal Code: 80225
Telephone: 303-236-7773
Contact Instruction: For inquiries regarding this document, please include the metadata contact person's name, dataset name, and publication series and number.
Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: FGDC-STD-001-1998
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