Accession Number : ADA116738

Title :   Geophysical Investigation of the Raton Basin.

Descriptive Note : Master's thesis,


Personal Author(s) : Cheney,Richard Stephen

PDF Url : ADA116738

Report Date : May 1982

Pagination or Media Count : 90

Abstract : This thesis correlates gravity, magnetic, and seismic data for the Raton Basin of Colorado and New Mexico. The gravity data suggest that the study area, and the region around it, is in isostatic equilibrium. The free air anomaly in the southern portion of the study area suggests lack of local compensation due to Quaternary volcanic rock. The volcanic rock thickness, calculated from the free air gravity data, is 180 m. The gravity data indicated a crustal thickness of about 45 km, and the crust thinned from west to east. A basement relief map was constructed from the Bouguer gravity data. Computer techniques were developed to calculate the depth to the basement surface and to plot a contour map of that surface. The Raton Basin magnetic map defined the same surface found on the basement relief map since the overlying sedimentary rocks have no magnetism; therefore, any magnetism present is caused by the basement rock. A seismic survey near Capulin Mountain detected a high level of microseismicity that may be caused by adjustment along faults or dormant volcanic activity. (Author)

Descriptors :   *Basins(Geographic), Colorado, New Mexico, Structural geology, Gravity anomalies, Geomagnetism, Seismic waves, Microseisms, Earth crust, Theses

Subject Categories : Geomagnetism
      Geology, Geochemistry and Mineralogy

Distribution Statement : APPROVED FOR PUBLIC RELEASE