Generalized thermal maturity map of Alaska

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Metadata:

Identification_Information:
Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1997
Title: Generalized thermal maturity map of Alaska
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place: Anchorage, AK
Publisher: U.S. Geological Survey
Online_Linkage: http://agdc.usgs.gov/data/usgs/geology/
Larger_Work_Citation:
Citation_Information:
Originator: Johnsson, M.J. (ed.)
Originator: Howell, D.G. (ed.)
Publication_Date: 1996
Title: Thermal evolution of sedimentary basins in Alaska
Series_Information:
Series_Name: U.S. Geological Survey Bulletin
Issue_Identification: B-2142
Online_Linkage: http://pubs.er.usgs.gov/publication/b2142
Description:
Abstract:
This dataset consists of a polygon coverage and associated attribute data derived from the onshore portion of the 1996 "Generalized Thermal Maturity Map of Alaska" compiled by M.J. Johnsson and D.G. Howell, which was published as Plate 1 in US Geological Survey Bulletin 2142: "Thermal Evolution of Sedimentary Basins in Alaska". The published map summarizes vitrinite reflectance and conodont alteration index data (both measure the thermal maturity of rocks) into generalized units that can be shown cartographically at 1:2,500,000. This digital dataset includes the 8 map units indicated on the original map. (5 thermal maturity levels; 2 rock or sediment type; 1 "no data"). The data quality of the generalized information is retained, with an attribute value for "certainty" whose value choices are "questioned" or "certain". Additional data retained in a look-up table are the maximum and minimum vitrinite reflectance and conodont alteration index values assigned to each thermal maturity level. This coverage is not intended to be a complete representation of the printed map. It does NOT include the following features: locations of individual vitrinite or conodont sample data points (these data are available in: Johnsson and others, 1992, USGS Open File Report 409, 3 diskettes); faults; offshore maturity data (from dredge and well samples); cities, glaciers, wells; inset maps and subsurface contours for the Colville basin and Cook Inlet; the correlation chart, text or references printed on the map.
Purpose:
This coverage is intended to provide digital features (polygons) representing generalized thermal maturity units in Alaska for use in small-scale spatial analysis (statewide) with similar coverages such as geologic units,vegetation types, soils, etc. Johnsson, M.J., Pawlewica, M.J., Harris, A.G., and Valin, Z.C., 1992, Vitrinite reflectance and conodont color alteration index data from Alaska: Data to accompany the Thermal Maturity Map of Alaska: U.S. Geological Survey Open File Report 92-409, 3 Macintosh-formatted 3 1/2" high density (1.44 Mb) diskettes.
Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1997
Currentness_Reference: Publication date = 1996
Status:
Progress: Complete
Maintenance_and_Update_Frequency: None planned
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -176.0
East_Bounding_Coordinate: -130.0
North_Bounding_Coordinate: 72.0
South_Bounding_Coordinate: 51.0
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: Geology
Theme_Keyword: Thermal
Theme_Keyword: Maturity
Theme_Keyword: Temperature
Theme_Keyword: Vitrinite
Theme_Keyword: Conodont
Theme:
Theme_Keyword_Thesaurus: ISO 19115 Topic Category
Theme_Keyword: geoscientificInformation
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Alaska
Stratum:
Stratum_Keyword_Thesaurus: None
Stratum_Keyword: None
Temporal:
Temporal_Keyword_Thesaurus: None
Temporal_Keyword: None
Access_Constraints: none
Use_Constraints:
This coverage should not be copied or distributed without its associated metadata file. Intended use is at small scales (e.g. statewide, 1:2,500,000 etc.) only; enlargements of this data to scales greater than that at which they were originally compiled can lead to misinterpretation of data. The U.S. Geological Survey (Dept. of Interior) should be acknowledged as the data source in products derived from these data. Use of these data is not restricted; however, organizations, agencies, units of government or other users are responsible for its appropriate application.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization:
U.S. Geological Survey Alaska Section, Mineral Resource Surveys Program, Geologic Division
Contact_Position: GIS Support Staff
Contact_Address:
Address_Type: mailing and physical address
Address: 4200 University Dr.
City: Anchorage
State_or_Province: AK
Postal_Code: 99508-4667
Contact_Voice_Telephone: (907)-786-7495
Browse_Graphic:
Browse_Graphic_File_Name: http://agdc.usgs.gov/data/usgs/geology/images/maturity.gif
Browse_Graphic_File_Description:
Reduced-size image of the entire map extent, 712x563 pixels, 18k bytes.
Browse_Graphic_File_Type: GIF
Data_Set_Credit: D. C. Pray, J. M. Schmidt
Native_Data_Set_Environment: SunOS, 5.5.1, sun4u UNIX, ARC/INFO version 7.1.2
Data_Quality_Information:
Attribute_Accuracy:
Attribute_Accuracy_Report:
The completeness and quality of the generalized maturity data in the digital coverage is that of the published 1996 map, which itself summarized data released in 1992 and collected prior to that date (mainly since 1980). No recent data have been added. The geographic accuracy of the published map has been slightly degraded by the rubber-sheet operation.
Completeness_Report:
The following map features are not included in the digital representation: Offshore data, faults, glaciers,subsurface contours, cities, wells, inset maps, correlation chart, text and references.
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator: U.S. Geological Survey
Publication_Date: 1996
Title: Generalized Thermal Maturity Map of Alaska
Series_Information:
Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map
Issue_Identification: I-2494
Publication_Information:
Publication_Place: Washington, D.C.
Publisher: U.S. Government Printing Office
Source_Scale_Denominator: 2500000
Type_of_Source_Media: Paper map
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1996
Source_Currentness_Reference: publication date
Source_Information:
Source_Citation:
Citation_Information:
Originator: Johnsson, M.J.
Originator: Pawlewica, M.J.
Originator: Harris, A.G.
Originator: Valin, Z.C.
Publication_Date: 1992
Title:
Vitrinite reflectance and conodont color alteration index data from Alaska: Data to accompany the Thermal Maturity Map of Alaska
Series_Information:
Series_Name: U.S. Geological Survey Open File Report
Issue_Identification: 92-409
Source_Scale_Denominator: 2500000
Type_of_Source_Media: floppy disk
Source_Time_Period_of_Content:
Time_Period_Information:
Single_Date/Time:
Calendar_Date: 1992
Source_Currentness_Reference: publication date
Process_Step:
Process_Description:
The linework was digitized in 1997 from a paper copy of the 1996 map at the U.S. Geological Survey's Alaska Section (Geologic Division) facilities in Anchorge, AK. The original Transverse Mercator projection of the map (Central Meridian: 100*W; Scale factor: 0.926; Reference ellipsoid:(6371204m, 63712004m)) was converted to an Albersequal-area coverage in ARC/INFO (version 7.1.2). The resulting coverage did not align exactly with an Albers equal-area coverage of the Alaskan coastline, so a rubber-sheeting operation was performed using points along the coastline and major rivers to match an Albers equal area projection. Map unit (polygon) locations and attributes were checked by the person responsible for the digitizing, and spot-checked by one reviewer reviewer, by comparing a printed copy of the coverage to the published map.
Process_Date: 1997
Spatial_Data_Organization_Information:
Direct_Spatial_Reference_Method: Vector
Point_and_Vector_Object_Information:
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: Point
Point_and_Vector_Object_Count: 1575
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: String
Point_and_Vector_Object_Count: 3453
SDTS_Terms_Description:
SDTS_Point_and_Vector_Object_Type: GT-polygon composed of chains
Point_and_Vector_Object_Count: 1576
Spatial_Reference_Information:
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Albers Conical Equal Area
Albers_Conical_Equal_Area:
Standard_Parallel: 55
Standard_Parallel: 65
Longitude_of_Central_Meridian: -154
Latitude_of_Projection_Origin: 50
False_Easting: 0.00000
False_Northing: 0.00000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:
Abscissa_Resolution: 1.0
Ordinate_Resolution: 1.0
Planar_Distance_Units: meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4
Denominator_of_Flattening_Ratio: 294.98
Entity_and_Attribute_Information:
Detailed_Description:
Entity_Type:
Entity_Type_Label: MATURITY.PAT
Entity_Type_Definition: Attribute table of Maturity
Attribute:
Attribute_Label: MATURITY
Attribute_Definition: Thermal-maturity units
Attribute_Definition_Source: Generalized Thermal Maturity Map of Alaska, 1996.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: U
Enumerated_Domain_Value_Definition: Undermature
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: M1
Enumerated_Domain_Value_Definition: Mature I
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: M2
Enumerated_Domain_Value_Definition: Mature II
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: O
Enumerated_Domain_Value_Definition: Overmature
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: S
Enumerated_Domain_Value_Definition: Supermature
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ig-M
Enumerated_Domain_Value_Definition: Igneous-Metamorphic
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Qs
Enumerated_Domain_Value_Definition: Quaternary sediments (unconsolidated)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: ND
Enumerated_Domain_Value_Definition: No data
Attribute:
Attribute_Label: CERTAINTY
Attribute_Definition: Confidence of thermal-maturity unit
Attribute_Definition_Source: Generalized Thermal Maturity Map of Alaska, 1996.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: C
Enumerated_Domain_Value_Definition: Certain
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Q
Enumerated_Domain_Value_Definition: Questioned
Detailed_Description:
Entity_Type:
Entity_Type_Label: MATURITY.DAT
Entity_Type_Definition:
Explanation of thermal-maturity units in terms of vitrinite reflectance and conodont alteration index values used to define them.
Entity_Type_Definition_Source: U.S. Geological Survey Bulletin 2142
Attribute:
Attribute_Label: MATURITY
Attribute_Definition: Thermal-maturity units
Attribute_Definition_Source: Generalized Thermal Maturity Map of Alaska, 1996.
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: U
Enumerated_Domain_Value_Definition: Undermature
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: M1
Enumerated_Domain_Value_Definition: Mature I
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: M2
Enumerated_Domain_Value_Definition: Mature II
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: O
Enumerated_Domain_Value_Definition: Overmature
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: S
Enumerated_Domain_Value_Definition: Supermature
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Ig-M
Enumerated_Domain_Value_Definition: Igneous-Metamorphic
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: Qs
Enumerated_Domain_Value_Definition: Quaternary sediments (unconsolidated)
Attribute_Domain_Values:
Enumerated_Domain:
Enumerated_Domain_Value: ND
Enumerated_Domain_Value_Definition: No data
Attribute:
Attribute_Label: RO-MIN
Attribute_Definition:
Minimum vitrinite reflectance value occurring in a thermal maturity unit.
Attribute_Definition_Source: U.S. Geological Survey Bulletin 2142
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 5.01
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: RO-MAX
Attribute_Definition:
Maximum vitrinite reflectance value occurring in a thermal maturity unit.
Attribute_Definition_Source: U.S. Geological Survey Bulletin 2142
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.01
Range_Domain_Maximum: 8
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: CAI-MIN
Attribute_Definition:
Minimum conodont alteration index value occurring in a thermal maturity unit.
Attribute_Definition_Source: U.S. Geological Survey Bulletin 2142
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0
Range_Domain_Maximum: 5
Attribute_Measurement_Resolution: 0.01
Attribute:
Attribute_Label: CAI-MAX
Attribute_Definition:
Maximum conodont alteration index value occurring in a thermal maturity unit.
Attribute_Definition_Source: U.S. Geological Survey Bulletin 2142
Attribute_Domain_Values:
Range_Domain:
Range_Domain_Minimum: 0.1
Range_Domain_Maximum: 8
Attribute_Measurement_Resolution: 0.01
Distribution_Information:
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Alaska Geographic Data Committee
Contact_Address:
Address_Type: mailing and physical
Address: 4230 University Drive
City: Anchorage
State_or_Province: AK
Postal_Code: 99508-4664
Contact_Electronic_Mail_Address: agdcweb@usgs.gov
Distribution_Liability:
Although these data have been processed successfully on a computer system at the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the Geological Survey regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty. The U.S. Dept. of Interior, nor any of its agencies are liable for misuse of the data, nor for any damage, transmission of viruses or computer contamination caused through transmission of these data sets.
Standard_Order_Process:
Digital_Form:
Digital_Transfer_Information:
Format_Name: ArcInfo interchange
Format_Version_Number: 7.x
Format_Information_Content: Polygon data with attributes
File_Decompression_Technique: gzip -d
Digital_Transfer_Option:
Online_Option:
Computer_Contact_Information:
Network_Address:
Fees: none
Metadata_Reference_Information:
Metadata_Date: 20160614
Metadata_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Person: Peter N Schweitzer
Contact_Organization: U.S. Geological Survey, ER
Contact_Position: Geologist
Contact_Address:
Address_Type: mailing address
Address:
Mail Stop 954
12201 Sunrise Valley Drive
City: Reston
State_or_Province: VA
Postal_Code: 20192
Country: USA
Contact_Voice_Telephone: 703-648-6533
Contact_Facsimile_Telephone: 703-648-6252
Contact_Electronic_Mail_Address: pschweitzer@usgs.gov
Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata
Metadata_Standard_Version: FGDC-STD-001-1998

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