Ground-water hydrology and water quality of Irwin Basin at Fort Irwin National Training Center, California The resulting resistivity models confirm and add to the geologic framework, constrain the hydrostratigraphy and the depth to basement, and reveal the distribution of faults and folds within the basin. This report releases data associated with the airborne surveys, as well as resistivity cross-sections and depth slices derived from inversion of the airborne electromagnetic data. A resistivity stratigraphy was developed using ground-based time-domain electromagnetic soundings together with laboratory resistivity measurements on hand samples and borehole geophysical logs from nearby basins.

These data were collected to characterize the subsurface and provide information needed to understand and manage groundwater resources within Fort Irwin.

Geological Survey conducted airborne electromagnetic and magnetic surveys of Leach Lake Basin within the National Training Center, Fort Irwin, California. Buesch, David C.įrom December 2010 to January 2011, the U.S. Each chapter includes hydrogeologic applications of the data or model results.Īirborne electromagnetic data and processing within Leach Lake Basin, Fort Irwin, California: Chapter G in Geology and geophysics applied to groundwater hydrology at Fort Irwin, Californiaīedrosian, Paul A. Gravity and aeromagnetic maps cover areas ~4 to 5 times that of Fort Irwin. These data were used in conjunction with ground-based time-domain and airborne data and interpretations to provide a framework for the shallow lithologic units and structure.

Electromagnetic properties of resistivity were measured in the laboratory on hand and core samples, and compared to borehole geophysical resistivity data. A generalized surficial geologic map along with field and borehole investigations conducted during 2010â€“11 provide a lithostratigraphic and structural framework for the area during the Cenozoic. Geologic and geophysical investigations in the vicinity of Fort Irwin National Training Center, California, have been completed in support of groundwater investigations, and are presented in eight chapters of this report. Introduction to the geologic and geophysical studies of Fort Irwin, California: Chapter A in Geology and geophysics applied to groundwater hydrology at Fort Irwin, California

Fort Carson groundwater plume map