Great Basin Shear Strain from Geodesy
Table of Contents
IDENTIFICATION_INFORMATION
Citation:
Citation_Information:
Originator: Kreemer, Corne
Originator: Blewitt, Geoff
Originator: Coolbaugh, Mark
Originator: Zehner, Richard
Publication_Date: 20050610
Title: Great Basin Shear Strain Rate from Geodesy
Edition:
Geospatial_Data_Presentation_Form: Map
Publication_Information:
Publication_Place: Reno, Nevada
Publisher: Great Basin Center for Geothermal Energy
Other_Citation_Details:
see http: http://geodesy.unr.edu/
for the Nevada Geodetic Laboratory. Also see
Kreemer, C., Blewitt, G., Hammond, W.C., and Coolbaugh,
M.F. (2004) A new strain rate model for the Great Basin and
its application to tectonic and geodynamic studies, Eos
Trans. AGU, v. 85(47), Fall Meet. Suppl.).
Online_Linkage: HTTP://www.unr.edu/Geothermal/
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publication_Place:
Publisher:
Online_Linkage:
Description:
Abstract:
This ESRI floating point GRID contains values of shear
strain rate calculated for the Great Basin using super-accurate
GPS (geodetic) locations from the BARGEN, USGS, and BARD network, as well
as other networks. The change in location of a GPS site over time
("geodetic velocity") are used as data input into a strain rate model which then
calculated strain on a 0.05 x 0.05 degree array over the Great Basin. A spline
interpolation technique was applied (Haines and Holt,
1993;Holt et al., 2000) in which model velocities are
fitted to observed GPS velocities, and those are then
interpolated to derive a continuous velocity gradient
tensor field, which implicitly defines the strain rate
tensor everywhere. These points were then interpolated onto
a surface using an inverse distance weighting method.
Purpose:
For geothermal exploration
Supplemental_Information:
Geodesy is but one way to measure the amount of crustal
strain in the Great Basin; other methods include fault slip
rate determination and offset measurements.
Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:
Ending_Date:
Currentness_Reference:
Status:
Progress: Complete
Maintenance_and_Update_Frequency: As needed
Spatial_Domain:
Bounding_Coordinates:
West_Bounding_Coordinate: -112.0938
East_Bounding_Coordinate: -78.1995
North_Bounding_Coordinate: 79.9983
South_Bounding_Coordinate: 73.3505
Keywords:
Theme:
Theme_Keyword_Thesaurus: None
Theme_Keyword: GPS
Theme_Keyword: Geodetic
Theme_Keyword: Strain
Theme_Keyword: Shear
Place:
Place_Keyword_Thesaurus: None
Place_Keyword: Arizona
Place_Keyword: California
Place_Keyword: Great Basin
Place_Keyword: Idaho
Place_Keyword: Nevada
Place_Keyword: North America
Place_Keyword: Oregon
Place_Keyword: Utah
Place_Keyword: Western United States
Place_Keyword: Wyoming
Access_Constraints:
Use_Constraints:
This spatial information was derived from a variety of
sources. Care was taken in the creation of these themes,
but they are provided "as is". The Great Basin Center for
Geothermal Energy, the University of Nevada, Reno or any of
the data providers cannot accept any responsibility for
errors, omissions, or positional accuracy in the digital
data or underlying records. There are no warranties,
expressed or implied, accompanying this data set.
Point_of_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Great Basin Center for Geothermal Energy
Contact_Person: Richard Zehner
Contact_Position: Research Scientist, Assistant GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: MS 172, University of Nevada Reno
City: Reno
State_or_Province: NV
Postal_Code: 89557
Country: USA
Contact_Voice_Telephone: 775-784-7055
Contact_Facsimile_Telephone: 775-327-5801
Contact_Electronic_Mail_Address: zehner@unr.edu
Hours_of_Service: M-F 8-5
Native_Data_Set_Environment:
ESRI Grid format
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DATA_QUALITY_INFORMATION
Attribute_Accuracy:
Attribute_Accuracy_Report:
Unknown and dependant on crustal models.
Logical_Consistency_Report:
Completeness_Report:
Positional_Accuracy:
Horizontal_Positional_Accuracy:
Horizontal_Positional_Accuracy_Report:
GPS locations are probably accurate to within a couple
of millimeters, and locally 0.5 millimeter.
Vertical_Positional_Accuracy:
Vertical_Positional_Accuracy_Report:
Lineage:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Edition:
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place:
Publisher:
Other_Citation_Details:
see
Kreemer, C., Blewitt, G., Hammond, W.C., and Coolbaugh,
M.F. (2004) A new strain rate model for the Great Basin and
its application to tectonic and geodynamic studies, Eos
Trans. AGU, v. 85(47), Fall Meet. Suppl.).
Online_Linkage:
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publication_Place:
Publisher:
Online_Linkage:
Source_Scale_Denominator:
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:
Ending_Date:
Source_Currentness_Reference:
Source_Citation_Abbreviation:
Source_Contribution:
Source_Information:
Source_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Edition:
Geospatial_Data_Presentation_Form: map
Publication_Information:
Publication_Place:
Publisher:
Other_Citation_Details:
see
Haines, A.J., and W.E. Holt (1993), A procedure for
obtaining the complete horizontal motions within zones of
distributed deformation from the inversion of strain rate
data, J. Geophys. Res., 98, 12057-12082.
Holt, W.E., B. Shen-Tu, J. Haines, and J. Jackson (2000),
On the determination of self-consistent strain rate fields
within zones of distributed deformation, in The History and
Dynamics of Global Plate Motions, edited by M. A. Richards,
R. G. Gordon and R. D. van der Hilst, pp. 113-141, AGU,
Washington, D.C. Kostrov,
V.V., Seismic moment and energy of earthquakes,
and seismic flow of rocks, Izv. Acad. Sci. USSR Phys. Solid
Earth, 1, Eng. Transl., 23-44, 1974.
Kreemer, C., Blewitt, G., Hammond, W.C., and Coolbaugh,
M.F. (2004) A new strain rate model for the Great Basin and
its application to tectonic and geodynamic studies, Eos
Trans. AGU, v. 85(47), Fall Meet. Suppl.).
Online_Linkage:
Larger_Work_Citation:
Citation_Information:
Originator:
Publication_Date:
Title:
Publication_Information:
Publication_Place:
Publisher:
Online_Linkage:
Source_Scale_Denominator:
Type_of_Source_Media:
Source_Time_Period_of_Content:
Time_Period_Information:
Range_of_Dates/Times:
Beginning_Date:
Ending_Date:
Source_Currentness_Reference:
Source_Citation_Abbreviation:
Source_Contribution:
Process_Step:
Process_Description:
1) Super-accurate GPS locations were determined from the BARGEN,
USGS, and BARD networks, as well as other networks.
2) Location differences over time were entered into a
crustal model which determines strain rates throughout the
Great Basin
3) Output from this model is a strain rate array on a 0.05 x 0.05
degree grid. A spline interpolation technique was applied
(Haines and Holt, 1993;Holt et al., 2000) in which model
velocities are fitted to observed GPS velocities, and those
are then interpolated to derive a continuous velocity
gradient tensor field, which implicitly defines the strain
rate tensor everywhere.
4) Points from this array were interpolated onto a surface
using an inverse distance weighting method (Neighbors = 25,
Powers = 1, cell size = 1 km)
5) This surface was clipped to the area of the Great Basin
using the shapefile gboutline.shp (http: HTTP://www.unr.edu/datalist.html
Source_Used_Citation_Abbreviation:
Process_Date:
Source_Produced_Citation_Abbreviation:
Process_Contact:
Contact_Information:
Contact_Person_Primary:
Contact_Organization: Corne Kreemer
Contact_Person: Nevada Seismological Laboratory (Nevada Bureau of Mines and Geology)
Contact_Position: Research Assistant Professor
Contact_Address:
Address_Type: mailing and physical address
Address: Nevada Bureau of Mines and Geology, MS 178, University of
Nevada, Reno
City: Reno
State_or_Province: NV
Postal_Code: 89557
Country: USA
Contact_Voice_Telephone: 775-784-6691 x154
Contact_Facsimile_Telephone: 775-784-1709
Contact_Electronic_Mail_Address: kreemer@unr.edu
Hours_of_Service: 9-6 M-F
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SPATIAL_DATA_ORGANIZATION_INFORMATION
Direct_Spatial_Reference_Method: Raster
Raster_Object_Information:
Raster_Object_Type: Grid Cell
Row_Count: 1035
Column_Count: 1000
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SPATIAL_REFERENCE_INFORMATION
Horizontal_Coordinate_System_Definition:
Planar:
Map_Projection:
Map_Projection_Name: Lambert Conformal Conic
Lambert_Conformal_Conic:
Standard_Parallel: 33.000000
Standard_Parallel: 45.000000
Longitude_of_Central_Meridian: -117.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 0.000000
False_Northing: 0.000000
Standard_Parallel: 33.000000
Standard_Parallel: 45.000000
Longitude_of_Central_Meridian: -117.000000
Latitude_of_Projection_Origin: 0.000000
False_Easting: 0.000000
False_Northing: 0.000000
Planar_Coordinate_Information:
Planar_Coordinate_Encoding_Method: Row and column
Coordinate_Representation:
Abscissa_Resolution:
Ordinate_Resolution:
Planar_Distance_Units: Meters
Geodetic_Model:
Horizontal_Datum_Name: North American Datum of 1927
Ellipsoid_Name: Clarke 1866
Semi-major_Axis: 6378206.4000000
Denominator_of_Flattening_Ratio: 294.98
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ENTITY_AND_ATTRIBUTE_INFORMATION
Overview_Description:
Entity_and_Attribute_Overview:
Values in the value field of this GRID are shear strain rate,
measured in nanometers per year.
Entity_and_Attribute_Detail_Citation:
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DISTRIBUTION_INFORMATION
Distributor:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Great Basin Center for Geothermal Energy
Contact_Person: Richard Zehner
Contact_Position: Research Scientist, Assistant GIS Specialist
Contact_Address:
Address_Type: mailing and physical address
Address: MS 172, University of Nevada Reno
City: Reno
State_or_Province: NV
Postal_Code: 89557
Country: USA
Contact_Voice_Telephone: 775-784-7055
Contact_Facsimile_Telephone: 775-327-5801
Contact_Electronic_Mail_Address: zehner@unr.edu
Hours_of_Service: M-F 8-5
Resource_Description:
Distribution_Liability:
This spatial information was derived from a variety of
sources. Care was taken in the creation of these themes,
but they are provided "as is". The Great Basin Center for
Geothermal Energy, the University of Nevada, Reno or any of
the data providers cannot accept any responsibility for
errors, omissions, or positional accuracy in the digital
data or underlying records. There are no warranties,
Top
METADATA_REFERENCE_INFORMATION
Metadata_Date: 20050610
Metadata_Review_Date:
Metadata_Contact:
Contact_Information:
Contact_Organization_Primary:
Contact_Organization: Great Basin Center for Geothermal Energy
Contact_Person: Richard Zehner
Contact_Position: Research Scientist, Assistant GIS Specialist
Contact_Address:
Address_Type: Mailing and physical address
Address: MS 172, University of Nevada Reno
City: Reno
State_or_Province: NV
Postal_Code: 89557
Country: USA
Contact_Voice_Telephone: 775-784-7055
Contact_Facsimile_Telephone: 775-327-5801
Contact_Electronic_Mail_Address: zehner@unr.edu
Hours_of_Service: M-F 8-5
Metadata_Standard_Name: FGDC CSDGM
Metadata_Standard_Version: FGDC-STD-001-1998
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