Description, Field Test and Data Analysis of a Controlled-Source EM System (EM-60)

The three Sections describe the transmitter, the receiver, and data interpretations and indicate the advances made toward the Development of a large moment electromagnetic (EM) system employing a magnetic dipole source. A brief description is given of the EM-60 transmitter, its general design, and the consideration involved in the selection of a practical coil size and weight for routine field operations. A programmable, multichannel, multi-frequency, phase-sensitive receiver is described. A field test of the EM-60, the data analysis and interpretation procedures, and a comparison between the survey results and the results obtained using other Electrical techniques are presented. The Leach Hot Springs area in Grass Valley, Pershing County, Nevada, was chosen for the first field site at which the entire system would be tested. The field tests showed the system capable of obtaining Well-defined sounding curves (amplitude and phase of magnetic fields) from 1 kHz down to 0.1 Hz. (MHR). Library ID#=oitGHC_0327-01.

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Citation Date 1978-01-01T00:00:00

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Original ID 20EDBAFE338A412A8BE60B5F6822A1AF
Index Date 2016-03-17T21:57:39
Original Format ISO-USGIN
Original Version 1.2

Author

Name Morrison, H.F. , Goldstein, N.E. , Hoversten, M. , Oppliger, G. , Riveros, C.
Organization Earth Sciences Division, Lawrence Berkeley Laboratory, Berkeley, California (USA)
Email geoheat@oit.edu