Geophysical Investigation of the Raton Basin.
AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH
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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
- Geology, Geochemistry and Mineralogy