Accession Number : ADA112199

Title :   MX Siting Investigation, Gravity Survey - Spring Valley, Nevada.

Descriptive Note : Final rept.

Corporate Author : ERTEC WESTERN INC LONG BEACH CA

PDF Url : ADA112199

Report Date : 20 May 1981

Pagination or Media Count : 59

Abstract : Gravity data indicate that the northern part of the Spring Valley study area is occupied by a subsided fault block. The block tilts downward toward the Snake Range on the east. This feature is probably the southern end of a major basin. The southern part of the study area is shallow, with a maximum depth to bedrock of about 1000 feet. The calculated bedrock depths are necessarily approxiamte because the complex and imperfectly known density distribution has been represented by a simple two-density model. Also, the residual gravity anomaly is necessarily based on an interpreted regional field. An average density contrast of -0.50 g/cu cm between the alluvium and bedrock was used to calculate the thickness of the valley-fill material. Future studies that acquire better density data or measure actual depths to bedrock in deep parts of the valley can be used to refine the gravity interpretation. (Author)

Descriptors :   *Valleys, *Gravity, Nevada, Surveys, Gravimetry, Mapping, Contours, Geology

Subject Categories : Geodesy
      Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE