Jared Peacock
Jared Peacock is a research geophysicist at the Geology, Minerals, Energy, and Geophysics Science Center in Menlo Park, CA. He received his Ph.D. from the University of Adelaide and B.S. and M.S. from the Colorado School of Mines, all in geophysics. Since joining the USGS In 2013, his expertise is in magnetotellurics, focusing on characterizing volcanic, geothermal, and mineral systems in 3D.
Professional Experience
2016 - Present, Research Geophysicist, U.S. Geological Survey, Menlo Park, CA
2013 - 2016, Mendenhall Post Doc, U.S. Geological Survey, Menlo Park, CA
Education and Certifications
Ph.D., Geophysics, University of Adelaide, 2012
M.S., Geophysics, Colorado School of Mines, 2007
B.S., Geophysics, Colorado School of Mines, 2005
Science and Products
Filter Total Items: 15
Magnetotelluric and gravity data from the Northwest Geysers, California Magnetotelluric and gravity data from the Northwest Geysers, California
This dataset consists of 42 magnetotelluric (MT) stations collected in 2017 in the Northwest Geysers, CA and 534 gravity stations collected in 2017 and 2019. The U.S. Geological Survey acquired these data as part of a project to image the heat source in the Northwest Geysers. Support was from the U.S. Geological Survey's Volcano Hazards Program.
Magnetotelluric Data from Gabbs Valley, Nevada, 2017 Magnetotelluric Data from Gabbs Valley, Nevada, 2017
This dataset consists of 24 magnetotelluric (MT) stations collected in 2017 in Gabbs Valley, Nevada. The U.S. Geological Survey acquired these data as part of Phase 2 of the Nevada Play Fairway Analysis Project led by the University of Nevada at Reno and funded by the Department of Energy (grant number DE-EE0006731) with support from the U.S. Geological Survey's Energy Program.
Magnetotelluric data from Mountain Pass, California, 2015 Magnetotelluric data from Mountain Pass, California, 2015
This dataset consists of 65 magnetotelluric (MT) stations collected in 2015 near Mountain Pass, California. The U.S. Geological Survey acquired these data to create a regional conductivity model near the Mountain Pass mine. This work is in support of characterizing mineral deposits.
Filter Total Items: 35
Structural properties of the Southern San Andreas fault zone in northern Coachella Valley from magnetotelluric imaging Structural properties of the Southern San Andreas fault zone in northern Coachella Valley from magnetotelluric imaging
The Southern San Andreas fault (SSAF) poses one of the largest seismic risks in California. Yet, there is much ambiguity regarding its deeper structural properties around Coachella Valley, in large part due to the relative paucity of everyday seismicity. Here, we image a multistranded section of the SSAF using a non-seismic method, namely magnetotelluric (MT) soundings, to help inform...
Authors
Pieter-Ewald Share-MacParland, Jared R. Peacock, Steve C. Constable, Frank L. Vernon, Shunguo Wang
MTH5: An archive and exchangeable data format for magnetotelluric time series data MTH5: An archive and exchangeable data format for magnetotelluric time series data
Magnetotellurics (MT) is a passive electromagnetic geophysical method that measures variations in subsurface electrical resistivity. MT data are collected in the time domain and processed in the frequency domain to produce estimates of a transfer function representing the Earth’s electrical structure. Unfortunately, the MT community lacks metadata and data standards for time series data...
Authors
Jared R. Peacock, Karl Kappler, Lindsey Heagy, Timothy Ronan, Anna Kelbert, Andrew Frassetto
Repeat magnetotelluric measurements to monitor The Geysers steam field in northern California Repeat magnetotelluric measurements to monitor The Geysers steam field in northern California
The Geysers in northern California is the world’s largest electricity generating steam field. To help understand changes in the steam reservoir, repeat magnetotelluric (MT) measurements are being collected once a year from 2021-2023. These data will be compared and modeled to provide 4-D images of changes within the reservoir. Joint inversion with passive seismic data will be done to...
Authors
Jared R. Peacock, David Alumbaugh, Michael Albert Mitchell, Craig Hartline
Bottom-up and top-down control on hydrothermal resources in the Great Basin: An example from Gabbs Valley, Nevada Bottom-up and top-down control on hydrothermal resources in the Great Basin: An example from Gabbs Valley, Nevada
The Great Basin in the western United States hosts various hydrothermal systems, including both active geothermal systems and ancient systems preserved as mineral deposits. New magnetotelluric and structural geologic data were collected in the Gabbs Valley area of western Nevada to demonstrate the advantage of imaging the full crustal column below known hydrothermal systems. Three...
Authors
Jared R. Peacock, Drew L. Siler
Three-dimensional electrical resistivity characterization of Mountain Pass, California and surrounding region Three-dimensional electrical resistivity characterization of Mountain Pass, California and surrounding region
The Sulphide Queen carbonatite deposit at Mountain Pass in southeast California is a world class rare earth element (REE) resource. This study images electrical resistivity structure of the REE deposit and surrounding area to characterize resources under cover. An east-west elongated grid (35 × 15 km) of 65 wideband magnetotelluric stations spanning from eastern Shadow Valley to eastern...
Authors
Jared R. Peacock, Kevin Denton, David A. Ponce
Multi-geophysical parameter classification of the Montserrat geothermal system Multi-geophysical parameter classification of the Montserrat geothermal system
Multi-geophysical parameter classification can help to reduce the uncertainties of interpretations that often rely on one geophysical technique. Integrating these varying datasets requires a more robust classification approach rather than traditional qualitative methods. In this study, we applied the Fuzzy c-means (FCM) method to quantitatively classify similarities in a high resolution...
Authors
Racine A. Basant, Graham A. Ryan, Jared R. Peacock, Antonio G. Camacho, Oshaine O. Blake, Stefanie Hautmann, Bridget Y. Lynne
Geophysical characterization of the Northwest Geysers geothermal field, California Geophysical characterization of the Northwest Geysers geothermal field, California
The Clear Lake Volcanic Field in northern California is the youngest and northern-most part of a long-lived volcanic system that has produced recent (~10 ka) eruptions. Adjacent to the Clear Lake Volcanic Field is the worlds largest energy producing geothermal field, The Geysers. The hottest part of The Geysers geothermal field is in the northwest where temperatures reach ~400 C at 3 km...
Authors
Jared R. Peacock, Tait E. Earney, Margret T. Mangan, William D. Schermerhorn, Jonathan M.G. Glen, Mark Walters, Craig Hartline
Temporal magnetotellurics reveals mechanics of the 2012 Mount Tongariro, NZ eruption Temporal magnetotellurics reveals mechanics of the 2012 Mount Tongariro, NZ eruption
Monitoring dynamics of volcanic eruptions with geophysics is challenging. In August and November 2012, two small eruptions from Mount Tongariro provided a unique opportunity to image subsurface changes caused by the eruptions. A detailed magnetotelluric survey of the Tongariro volcanic complex completed prior to the eruption (2008–2010) provides the preeruption structure of the magmatic...
Authors
Graham J. Hill, Hugh M. Bibby, Jared R. Peacock, Erin L. Wallin, Yasuo Ogawa, Luca Caricchi, Harry Keys, Stewart L. Bennie, Yann Avram
Play fairway analysis in geothermal exploration: The Snake River plain volcanic province Play fairway analysis in geothermal exploration: The Snake River plain volcanic province
The Snake River volcanic province (SRP) has long been considered a target for geothermal development. It overlies a thermal anomaly that extends deep into the mantle and represents one of the highest heat flow provinces in North America, but systematic exploration been hindered by lack of a conceptual model. Play Fairway Analysis (PFA) is a methodology adapted from the petroleum industry...
Authors
John W. Shervais, Jonathan M.G. Glen, Drew L. Siler, Lee Liberty, Dennis Nielson, Sabodh Garg, Patrick Dobson, Erika Gasperikova, Eric Sonnenthal, Dennis Newell, James E. Evans, Jacob DeAngelo, Jared R. Peacock, Tait E. Earney, William D. Schermerhorn, Ghanashyam Neupane
Geophysical characterization of a Proterozoic REE terrane at Mountain Pass, eastern Mojave Desert, California Geophysical characterization of a Proterozoic REE terrane at Mountain Pass, eastern Mojave Desert, California
Mountain Pass, California (USA), located in the eastern Mojave Desert, hosts one of the world’s richest rare earth element (REE) deposits. The REE-rich terrane occurs in a 2.5-km-wide, northwest-trending belt of Mesoproterozoic (1.4 Ga) stocks and dikes, which intrude a larger Paleoproterozoic (1.7 Ga) metamorphic block that extends ∼10 km southward from Clark Mountain to the eastern...
Authors
Kevin Denton, David A. Ponce, Jared R. Peacock, David M. Miller
Crustal magmatism and anisotropy beneath the Arabian Shield - A cautionary tale Crustal magmatism and anisotropy beneath the Arabian Shield - A cautionary tale
Volcanism in Saudi Arabia includes a historic eruption close to the holy city of Al Madinah. As part of a volcanic hazard assessment of this area, magnetotelluric (MT) data were collected to investigate the structural setting, the distribution of melt within the crust, and the mantle source of volcanism. Interpretation of a new 3‐D resistivity model includes a shallow graben beneath thin...
Authors
Paul A. Bedrosian, Jared R. Peacock, Maher K. Al-Dhahry, Adel Shareef, D. W. Feucht, Hani M. Zahran
The MTPy software package for magnetotelluric data analysis and visualisation The MTPy software package for magnetotelluric data analysis and visualisation
The magnetotelluric (MT) method is increasingly being applied to a wide variety of geoscience problems. However, the software available for MT data analysis and interpretation is still very limited in comparison to many of the more mature geophysical methods such as the gravity, magnetic or seismic reflection methods. MTPy is an open source Python package to assist with MT data...
Authors
Alison Kirkby, Fei Zhang, Jared R. Peacock, Rakib Hassan, Jingming Duan
Science and Products
Filter Total Items: 15
Magnetotelluric and gravity data from the Northwest Geysers, California Magnetotelluric and gravity data from the Northwest Geysers, California
This dataset consists of 42 magnetotelluric (MT) stations collected in 2017 in the Northwest Geysers, CA and 534 gravity stations collected in 2017 and 2019. The U.S. Geological Survey acquired these data as part of a project to image the heat source in the Northwest Geysers. Support was from the U.S. Geological Survey's Volcano Hazards Program.
Magnetotelluric Data from Gabbs Valley, Nevada, 2017 Magnetotelluric Data from Gabbs Valley, Nevada, 2017
This dataset consists of 24 magnetotelluric (MT) stations collected in 2017 in Gabbs Valley, Nevada. The U.S. Geological Survey acquired these data as part of Phase 2 of the Nevada Play Fairway Analysis Project led by the University of Nevada at Reno and funded by the Department of Energy (grant number DE-EE0006731) with support from the U.S. Geological Survey's Energy Program.
Magnetotelluric data from Mountain Pass, California, 2015 Magnetotelluric data from Mountain Pass, California, 2015
This dataset consists of 65 magnetotelluric (MT) stations collected in 2015 near Mountain Pass, California. The U.S. Geological Survey acquired these data to create a regional conductivity model near the Mountain Pass mine. This work is in support of characterizing mineral deposits.
Filter Total Items: 35
Structural properties of the Southern San Andreas fault zone in northern Coachella Valley from magnetotelluric imaging Structural properties of the Southern San Andreas fault zone in northern Coachella Valley from magnetotelluric imaging
The Southern San Andreas fault (SSAF) poses one of the largest seismic risks in California. Yet, there is much ambiguity regarding its deeper structural properties around Coachella Valley, in large part due to the relative paucity of everyday seismicity. Here, we image a multistranded section of the SSAF using a non-seismic method, namely magnetotelluric (MT) soundings, to help inform...
Authors
Pieter-Ewald Share-MacParland, Jared R. Peacock, Steve C. Constable, Frank L. Vernon, Shunguo Wang
MTH5: An archive and exchangeable data format for magnetotelluric time series data MTH5: An archive and exchangeable data format for magnetotelluric time series data
Magnetotellurics (MT) is a passive electromagnetic geophysical method that measures variations in subsurface electrical resistivity. MT data are collected in the time domain and processed in the frequency domain to produce estimates of a transfer function representing the Earth’s electrical structure. Unfortunately, the MT community lacks metadata and data standards for time series data...
Authors
Jared R. Peacock, Karl Kappler, Lindsey Heagy, Timothy Ronan, Anna Kelbert, Andrew Frassetto
Repeat magnetotelluric measurements to monitor The Geysers steam field in northern California Repeat magnetotelluric measurements to monitor The Geysers steam field in northern California
The Geysers in northern California is the world’s largest electricity generating steam field. To help understand changes in the steam reservoir, repeat magnetotelluric (MT) measurements are being collected once a year from 2021-2023. These data will be compared and modeled to provide 4-D images of changes within the reservoir. Joint inversion with passive seismic data will be done to...
Authors
Jared R. Peacock, David Alumbaugh, Michael Albert Mitchell, Craig Hartline
Bottom-up and top-down control on hydrothermal resources in the Great Basin: An example from Gabbs Valley, Nevada Bottom-up and top-down control on hydrothermal resources in the Great Basin: An example from Gabbs Valley, Nevada
The Great Basin in the western United States hosts various hydrothermal systems, including both active geothermal systems and ancient systems preserved as mineral deposits. New magnetotelluric and structural geologic data were collected in the Gabbs Valley area of western Nevada to demonstrate the advantage of imaging the full crustal column below known hydrothermal systems. Three...
Authors
Jared R. Peacock, Drew L. Siler
Three-dimensional electrical resistivity characterization of Mountain Pass, California and surrounding region Three-dimensional electrical resistivity characterization of Mountain Pass, California and surrounding region
The Sulphide Queen carbonatite deposit at Mountain Pass in southeast California is a world class rare earth element (REE) resource. This study images electrical resistivity structure of the REE deposit and surrounding area to characterize resources under cover. An east-west elongated grid (35 × 15 km) of 65 wideband magnetotelluric stations spanning from eastern Shadow Valley to eastern...
Authors
Jared R. Peacock, Kevin Denton, David A. Ponce
Multi-geophysical parameter classification of the Montserrat geothermal system Multi-geophysical parameter classification of the Montserrat geothermal system
Multi-geophysical parameter classification can help to reduce the uncertainties of interpretations that often rely on one geophysical technique. Integrating these varying datasets requires a more robust classification approach rather than traditional qualitative methods. In this study, we applied the Fuzzy c-means (FCM) method to quantitatively classify similarities in a high resolution...
Authors
Racine A. Basant, Graham A. Ryan, Jared R. Peacock, Antonio G. Camacho, Oshaine O. Blake, Stefanie Hautmann, Bridget Y. Lynne
Geophysical characterization of the Northwest Geysers geothermal field, California Geophysical characterization of the Northwest Geysers geothermal field, California
The Clear Lake Volcanic Field in northern California is the youngest and northern-most part of a long-lived volcanic system that has produced recent (~10 ka) eruptions. Adjacent to the Clear Lake Volcanic Field is the worlds largest energy producing geothermal field, The Geysers. The hottest part of The Geysers geothermal field is in the northwest where temperatures reach ~400 C at 3 km...
Authors
Jared R. Peacock, Tait E. Earney, Margret T. Mangan, William D. Schermerhorn, Jonathan M.G. Glen, Mark Walters, Craig Hartline
Temporal magnetotellurics reveals mechanics of the 2012 Mount Tongariro, NZ eruption Temporal magnetotellurics reveals mechanics of the 2012 Mount Tongariro, NZ eruption
Monitoring dynamics of volcanic eruptions with geophysics is challenging. In August and November 2012, two small eruptions from Mount Tongariro provided a unique opportunity to image subsurface changes caused by the eruptions. A detailed magnetotelluric survey of the Tongariro volcanic complex completed prior to the eruption (2008–2010) provides the preeruption structure of the magmatic...
Authors
Graham J. Hill, Hugh M. Bibby, Jared R. Peacock, Erin L. Wallin, Yasuo Ogawa, Luca Caricchi, Harry Keys, Stewart L. Bennie, Yann Avram
Play fairway analysis in geothermal exploration: The Snake River plain volcanic province Play fairway analysis in geothermal exploration: The Snake River plain volcanic province
The Snake River volcanic province (SRP) has long been considered a target for geothermal development. It overlies a thermal anomaly that extends deep into the mantle and represents one of the highest heat flow provinces in North America, but systematic exploration been hindered by lack of a conceptual model. Play Fairway Analysis (PFA) is a methodology adapted from the petroleum industry...
Authors
John W. Shervais, Jonathan M.G. Glen, Drew L. Siler, Lee Liberty, Dennis Nielson, Sabodh Garg, Patrick Dobson, Erika Gasperikova, Eric Sonnenthal, Dennis Newell, James E. Evans, Jacob DeAngelo, Jared R. Peacock, Tait E. Earney, William D. Schermerhorn, Ghanashyam Neupane
Geophysical characterization of a Proterozoic REE terrane at Mountain Pass, eastern Mojave Desert, California Geophysical characterization of a Proterozoic REE terrane at Mountain Pass, eastern Mojave Desert, California
Mountain Pass, California (USA), located in the eastern Mojave Desert, hosts one of the world’s richest rare earth element (REE) deposits. The REE-rich terrane occurs in a 2.5-km-wide, northwest-trending belt of Mesoproterozoic (1.4 Ga) stocks and dikes, which intrude a larger Paleoproterozoic (1.7 Ga) metamorphic block that extends ∼10 km southward from Clark Mountain to the eastern...
Authors
Kevin Denton, David A. Ponce, Jared R. Peacock, David M. Miller
Crustal magmatism and anisotropy beneath the Arabian Shield - A cautionary tale Crustal magmatism and anisotropy beneath the Arabian Shield - A cautionary tale
Volcanism in Saudi Arabia includes a historic eruption close to the holy city of Al Madinah. As part of a volcanic hazard assessment of this area, magnetotelluric (MT) data were collected to investigate the structural setting, the distribution of melt within the crust, and the mantle source of volcanism. Interpretation of a new 3‐D resistivity model includes a shallow graben beneath thin...
Authors
Paul A. Bedrosian, Jared R. Peacock, Maher K. Al-Dhahry, Adel Shareef, D. W. Feucht, Hani M. Zahran
The MTPy software package for magnetotelluric data analysis and visualisation The MTPy software package for magnetotelluric data analysis and visualisation
The magnetotelluric (MT) method is increasingly being applied to a wide variety of geoscience problems. However, the software available for MT data analysis and interpretation is still very limited in comparison to many of the more mature geophysical methods such as the gravity, magnetic or seismic reflection methods. MTPy is an open source Python package to assist with MT data...
Authors
Alison Kirkby, Fei Zhang, Jared R. Peacock, Rakib Hassan, Jingming Duan