Improved Resolution GIS compatible Gravity and Aeromagnetic Data Sets for Great Basin Geothermal Exploration 

UNR Great Basin Center for Geothermal Energy

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Products available for download:

 

Data Disclaimer: It is fully the user’s responsibility to validate the accuracy and suitability of these data for a given application. The University of Nevada Reno, UCCSN, Great Basin Center for Geothermal Energy, Arthur Brant Laboratory for Exploration Geophysics, U. S. Department of Energy and other participating agencies, and their researchers and employees provide no warranty of any kind that the provided data and documentation products are free from error or complete. 

 

If you know what you are looking for you can go directly to the FTP site below

Link to FTP data download site.    Organized by directories
If your system cannot access this FTP site use the web alternative below.
Link to Web data download site.   Organized by directories

 

Link to   Data Documentation and Product Description page 

Links to Other directly compatible GIS data sources.

 

 

Figure 6.  Color Shaded Isostatic Residual Gravity Anomaly Reduced at 2.67 g/cc density.  Data area is 1160 km by 1200 km.

Data Source: New compilation with gridded 1000 m grid cells.

Full resolution image (300 m pixels)

 Lambert projection:

  Tif image file (~ 50 MB)   (right click and save target as)
  GB_GRV_ISO_RES_Lambert.tif

  World registration tifw file  (right click and save target as)
  GB_GRV_ISO_RES_Lambert.tifw

 

 

Figure 7.  Color Isostatic Residual Gravity Anomaly upward continued 10 km viewed on shaded topography.  Data area is 1160 km by 1200 km.

Data Source: New compilation gridded with 1000 m grid cells.

isostatic residual gravity smoothed by upward continuation 10 km.

Full resolution image (300 m pixels)

 Lambert projection:

  Tif image file (~ 50 MB)   (right click and save target as)
  GB_GRV_ISO_RES_upc10km_DEM_SR_LAM.tif

  World registration tifw file  (right click and save target as)
  GB_GRV_ISO_RES_upc10km_DEM_SR_LAM.tifw

 

Same as above with King USA faults

  Tif image file (~ 50 MB) 

  World registration tifw file

Figure 8.  Color Shaded Complete Bouguer Gravity Anomaly Reduced at 2.67 g/cc density.  Data area is 1160 km by 1200 km.

Data Source: New compilation with gridded 1000 m grid cells.

Full resolution image (300 m pixels)

 Lambert projection:

  Tif image file (~ 50 MB)   (right click and save target as)
  GB_GRV_CBA267_LAM_1km.tif

  World registration tifw file  (right click and save target as)
  GB_GRV_CBA267_LAM_1km.tifw

 

 

Figure 9.  Color Shaded Free Air Gravity Anomaly.

Data area is 1160 km by 1200 km.

Data Source: New compilation gridded with 1000 m grid cells.

Full resolution image (300 m pixels)

 Lambert projection:

  Tif image file (~ 50 MB)   (right click and save target as)
  GB_GRV_FreeAir_LAM_1km.tif

  World registration tifw file  (right click and save target as)
  GB_GRV_FreeAir_LAM_1km.tifw

 

Figure 1.   Digital Elevation Model color-shaded relief image showing Great Basin outline and county boundaries. Data area is 1160 km by 1200 km.

Data Source: GTOPO30 prepared at 600 m grid cell size.

 

Full resolution image (300 m pixels)

  Lambert projection:

  Tif image file (~ 48 MB)   (right click and save target as)
  GB_GTOPO30_Lambert.tif

  World registration tifw file  (right click and save target as)
  GB_GTOPO30_Lambert.tifw

 

 

Figure 2.  Shallow crustal residual gravity anomaly color-shaded-relief.

 

Data Source: New compilation with 1000 m grid cells.

Residual produced by removing 20 km upward continuation of isostatic residual anomaly from isostatic residual anomaly.

Full resolution image (300 m pixels)

  Lambert projection:

  Tif image file  (~ 48 MB)  (right click and save target as)
 
GB_GRV_ISO_RES_upc20km_rersid_Lambert.tif

  World registration tifw file  (right click and save target as)

   GB_GRV_ISO_RES_upc20km_rersid_Lambert.tifw

 

   Grid and contour files are also available.

 

 

Figure 3.  Sample detail of Residual gravity 1 milligal contours on 90m-resolution color shaded-relief DEM map area is 25 km by 25 km.

 

Line graphics:

Gravity station locations and shallow crustal residual gravity contours (1 mgal interval) suitable for plotting on 1:250,000 scale maps.

 Lambert projection:

  Contour ArcView Shape file group(~ 37 MB)  zipped
 
(right click and save target as)
 
GB_GRV_Residual_1mgal_contours_ln_shp.zip

  Station points ArcView Shape file group (~ 11 MB) zipped
  (right click and save target as)
 
GB_grv_stns_pt_shp.zip

 

 

Figure 4.  Shallow crustal residual gravity anomaly – grid displayed here as B&W intensity image.

 

Data Source: New compilation with 1000 m grid cells.

Residual produced by removing 20 km upward continuation of isostatic residual anomaly from isostatic residual anomaly.

Full resolution grid (1000 meter cells)

   Lambert projection:

  ArcView flt binary grid file (~ 5.3 MB)
   (right click and save target as)
    GB_grv_shallow_crust_resdual_Lambert.flt

  Associated hdr file (1 KB)
 
 (right click and save target as)
    GB_grv_shallow_crust_resdual_Lambert.hdr

  

Figure 5.  Magnetic total field intensity anomaly (IGRF corrected) reduced to 305 meters above ground.

 

Data source: USGS compiled aeromagnetic grid (1km cells) USGS, Kucks 2001.

 

Full resolution image (300 m pixels)

 Lambert projection:

  Tif image file (~ 48 MB)
 
(right click and save target as)
  GB_AMAG_USGS_1km_Lambert.tif

  World registration tifw file
  (right click and save target as)
  GB_AMAG_USGS_1km_Lambert.tifw

 

 

 

   

Below are a few other sources of geoscience layers that can be combined and viewed in ArcView-type programs without format conversions or re-projections.

 

The UNR Keck Earth Science data site offers projection and format compatible:

 

DDS-41 Great Basin Geoscience Database - shape files from the.

 http://keck.library.unr.edu/data/gbgeosci/gbgdb.htm .

 

Topographic base maps (DRGs) 1:250,000 and 1:100,000 scales - ArcView compatible Tiff format

            http://keck.library.unr.edu/data/drg/drgs.html .

 

The UNR Arthur Brant Laboratory is developing an integrated map server to deliver these data sets.

            http://able1.mines.unr.edu .

 

Great Basin Center for Geothermal – Data Resources

http://www.unr.edu/geothermal/evaluatingresources/dataresources.html