McGee Mountain Geoprobe Study, Humboldt County, Nevada
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Geoprobes were developed by the environmental industry to collect water, gas and soil samples from contaminated sites at shallow depths (10-40 meters), with a minimum of environmental disturbance. A modified Geoprobe was used to collect bottom hole temperatures, and attempt to collect geothermal water samples, at the McGee Mountain geothermal property in Humboldt County, Nevada. A total of 23 holes were probed in five days for a cumulative total of 857.5 ft. at 21 sites at the project area. The probed holes ranged in depth from a maximum of 75ft to a minimum of 10ft and averaged 37.3ft. The average temperature of the 23 holes was 18.9 degrees C, corrected(from an average of 23.8 degrees C, uncorrected) with a range of 42.0 degrees C (site MMTG#19) for a maximum and 12.0 degrees C, corrected (site MMTG#1b). Since the water table was not encountered in any hole, no down-hole water samples were collected. However, water sampling was conducted at nearby springs and wells. PDF file, 15 MB file size.
McGee Mountain Geoprobe Survey, Humboldt County, Nevada
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This shapefile contains location and attribute data for a Geoprobe temperature survey conducted by Geothermal Technical Partners, Inc. during 2010. The purpose of direct push technology (DPT) probe activity at the McGee Mtn. Project, Nevada was to 1) determine bottom hole temperatures using nominal 1.5 inch probe tooling to place resistance temperature detectors (RTD) and 2) take water samples, if possible, to characterize the geothermometry of the system. A total of 23 holes were probed in five days for a cumulative total of 857.5 ft. at 21 sites at McGee Mountain. The probed holes ranged in depth from a maximum of 75 ft to a minimum of 10 ft and averaged 37.3 ft. The average temperature of the 23 holes was 18.9 degrees C, with a range of 12.0 degrees C at site MMTG#1b to 42.0 degrees C at site MMTG#19. . No water was encountered in any of the probed holes, with the exception of MMTG#10, and no water was collected for sampling. Zip file containing Arcview shapefile in UTM11 NAD83 projection. 5 kb file size.
McGee Mountain Shallow (2m) Temperature Survey, Humboldt County, Nevada 2009
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This shapefile contains location and attribute data for a shallow (2 meter) temperature survey conducted by Geothermal Technical Partners, Inc. during late 2008 and early 2009. Temperatures at 2m depth were measured at 192 separate points as outlined by Coolbaugh et al., 2007. The purpose of the survey was to try and detect a shallow thermal anomaly associated with the McGee Mountain geothermal area as discovered by Phillips Petroleum and Earth Power Resources in the late 1970s. Drilling identified ~120 degree C temperatures at ~100m depth. This 2-meter survey delineated what was interpreted as a steam-heated fault zone centered along a range front fault in the vicinity of the drilled holes and fumaroles. Coolbaugh, M.F., Sladek, C., Faulds, J.E., Zehner, R.E., and Oppliger, G.L., 2007, Use of rapid temperature measurements at a 2-meter depth to augment deeper temperature gradient drilling: Proceedings, 32nd Workshop on Geothermal Reservoir Engineering, Stanford University, Stanford, CA, Jan. 22-24, 2007, p. 109-116. Zehner, R., Tullar, K., and Rutledge, E., 2012, Effectiveness of 2-Meter and geoprobe shallow temperature surveys in early stage geothermal exploration: Geothermal Resources Council Transactions, v. 36, in press.