Magnetotelluric survey to characterize the Sunnyside porphyry copper system in the Patagonia Mountains, Arizona

Rodriguez, Brian D.; Sampson, Jay A.

doi:10.3133/ofr20101171

Open-File Report

2010

DOI: 10.3133/ofr20101171

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Magnetotelluric survey to characterize the Sunnyside porphyry copper system in the Patagonia Mountains, Arizona

Brian D. Rodriguez¹,

Jay A. Sampson²

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Cited by 2 publications

References 15 publications

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Groundwater exploration in a granite aquifer using the telluric electric frequency selection method (TEFSM) in Eswatini, Southern Africa

Gomo,

Ngobe

2024

Sustain. Water Resour. Manag.

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Recent technology development has enabled the use of electric potential difference (EPD) in the telluric electric frequency selection method (TEFSM) geophysical approach for groundwater exploration. As a new approach, there is a need to build knowledge and experience in the application of the TEFSM geophysical approach in groundwater exploration in different hydrogeological settings. Hard rock granite aquifers are one of those aquifers where the TEFSM geophysical approach to exploring groundwater is yet to be investigated. In this study, a geophysical survey to identify four drilling sites for community boreholes was first conducted using the TEFSM approach. Vertical electrical profiles (VEP) of EPD up to 120 m per station were analyzed and interpreted to identify the depths of potential aquifers prior to drilling. The EPD VEP was then corroborated with borehole lithology data collected from the drilling to provide hydrogeophysical meaning to the data. The results show that groundwater occurs in the weathered granite layers. However, the water strikes appear to occur at the contact plane between the overlying weathered granite and the underlying fresh amphibolite. This suggests that the groundwater is stored in the weathered granite while the contact plane at fresh amphibolite is a preferential flow path. The granite aquifer at the study site is characterized by the EPD ranging from 0.018 to 0.068 mV. However, not all geological materials in this EPD range had water, some were just a reflection of weathering. The TEFSM geophysical approach was able to delineate layers of weathered granite aquifers and impermeable amphibolite based on low and high EPD contrasts, respectively. The findings assist in improving the practical understanding of the application of TEFSM to delineate aquifers and site boreholes in granite aquifers.

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Groundwater exploration in a granite aquifer using the telluric electric frequency selection method (TEFSM) in Eswatini, Southern Africa

Gomo,

Ngobe

2024

Sustain. Water Resour. Manag.

View full text Add to dashboard Cite

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Application of Audio-Magnetotelluric Method for Exploration the Concealed Ore-Bodies in Yuele Lead-Zinc Ore Feild, Daguan County, NE Yunnan Province, China

Lap¹,

Xue²,

Wei³

et al. 2014

GEP

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The results of recent mineral exploration in the Yuele lead-zinc mining area of Daguan County, northeastern Yunnan province, showed that there are much early Paleozoic strata under thick late Paleozoic strata in northeastern Yunnan province, where developed some hidden salt structures (SSs), often with lead-zinc polymetallic mineralization varying degrees along the tension torsional fault (belts) or fracture (joint). The ore-bodies belong to the epigenetic hydrothermal filling vein-type deposit, and the prospecting potential is great. In this area, the superficial mineralization information displayed clear, but the deep mineralization is unknown, so the exploration work is restricted. The audio-megnetotelluric (AMT) surveying is an advantageous method to characterize the size, resistivity and skin depth of the polarizable mineral deposit concealed beneath thick overburden. This paper presents the surveying results using AMT method to evaluate the concealed lead-zinc mineralization in Yuele lead-zinc ore field, Daguancounty, NE Yunnan province, China. After comparing the interpretation result of AMT surveying data with the geological data and the drilling data, it is found that there is some distinct difference in resistivity and polarizable between ore-bodies hosted strata, upper strata and gypsum strata. The results show that AMT method is helpful to identify lead-zinc mineralization under this geological condition.

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Magnetotelluric survey to characterize the Sunnyside porphyry copper system in the Patagonia Mountains, Arizona

Cited by 2 publications

References 15 publications

Groundwater exploration in a granite aquifer using the telluric electric frequency selection method (TEFSM) in Eswatini, Southern Africa

Groundwater exploration in a granite aquifer using the telluric electric frequency selection method (TEFSM) in Eswatini, Southern Africa

Application of Audio-Magnetotelluric Method for Exploration the Concealed Ore-Bodies in Yuele Lead-Zinc Ore Feild, Daguan County, NE Yunnan Province, China

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