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: 25
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 that inte
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
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 Mescal Range.
Authors
Kevin Denton, David A. Ponce, Jared R. Peacock, David M. Miller
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 lava fiel
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 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 processing, analysi
Authors
Alison Kirkby, Fei Zhang, Jared R. Peacock, Rakib Hassan, Jingming Duan
Geophysical Characterization of the heat source in the Northwest Geysers, California
The Geysers, in northern California, is the largest energy producing geothermal field in the world. Looking to expand capacity, the operator Calpine Corporation developed an anomalously hot (~400 °C at 2.5 km depth) part of the field in the northwest Geysers, including testing of an enhanced geothermal systems (EGS). Though the area is anomalously hot, geophysical methods have failed to adequately
Authors
Jared R. Peacock, Margaret T. Mangan, Mark Walters, Craig Hartline, Jonathan M.G. Glen, Tait E. Earney, William D. Schermerhorn
Discovery of a blind geothermal system in Southern Gabbs Valley, western Nevada, through application of the play fairway analysis at multiple scales
The Great Basin region is capable of generating much greater amounts of geothermal energy than currently produced. Most geothermal resources in this region are blind, and thus favorable characteristics for geothermal activity must be synthesized and methodologies developed to discover new commercial-grade systems. The geothermal play fairway concept involves integration of multiple parameters indi
Authors
James Faulds, Jason W. Craig, Nicholas H. Hinz, Mark F. Coolbaugh, Jonathan M. Glen, Tait E. Earney, William D. Schermerhorn, Jared R. Peacock, Stephen B. Deoreo, Drew L. Siler
Crustal inheritance and a top-down control on arc magmatism at Mount St Helens
In a subduction zone, the volcanic arc marks the location where magma, generated via flux melting in the mantle wedge, migrates through the crust and erupts. While the location of deep magma broadly defines the arc position, here we argue that crustal structures, identified in geophysical data from the Washington Cascades magmatic arc, are equally important in controlling magma ascent and defining
Authors
Paul A. Bedrosian, Jared R. Peacock, Esteban Bowles-Martinez, Adam Schultz, Graham Hill
Conductivity response to intraplate deformation: Evidence for metamorphic devolatilization and crustal‐scale fluid focusing
We present two‐dimensional electrical resistivity models of two 40 km magnetotelluric (MT) profiles across the Frome Embayment to the east of the northern Flinders Ranges, South Australia. The lower crust shows low resistivity of 10 Ω m at around 30 km depth. The middle crust is dominated by resistive (>1000 Ω m) basement rocks underlying the Flinders Ranges. Adjacent to the ranges, conductive low
Authors
Stephan Thiel, Paul Soeffky, Lars Krieger, Klaus Regenauer-Lieb, Jared R. Peacock, Graham Heinson
Three-dimensional electrical resistivity model of the hydrothermal system in Long Valley Caldera, California, from magnetotellurics
Though shallow flow of hydrothermal fluids in Long Valley Caldera, California, has been well studied, neither the hydrothermal source reservoir nor heat source has been well characterized. Here a grid of magnetotelluric data were collected around the Long Valley volcanic system and modeled in 3-D. The preferred electrical resistivity model suggests that the source reservoir is a narrow east-west e
Authors
Jared R. Peacock, Margaret T. Mangan, Darcy McPhee, Phil E. Wannamaker
Magnetotelluric investigation of the Vestfold Hills and Rauer Group, East Antarctica
The Vestfold Hills and Rauer Group in East Antarctica have contrasting Archean to Neoproterozoic geological histories and are believed to be juxtaposed along a suture zone that now lies beneath the Sørsdal Glacier. Exact location and age of this suture zone are unknown, as is its relationship to regional deformation associated with the amalgamation of East Gondwana. To image the suture zone, magne
Authors
Jared R. Peacock, Katherine Selway
Probabilistic 3-D time-lapse inversion of magnetotelluric data: Application to an enhanced geothermal system
Surface-based monitoring of mass transfer caused by injections and extractions in deep boreholes is crucial to maximize oil, gas and geothermal production. Inductive electromagnetic methods, such as magnetotellurics, are appealing for these applications due to their large penetration depths and sensitivity to changes in fluid conductivity and fracture connectivity. In this work, we propose a 3-D M
Authors
Marina Rosas-Carbajal, Nicolas Linde, Jared R. Peacock, F. I. Zyserman, Thomas Kalscheuer, Stephan Thiel
Imaging the magmatic system of Mono Basin, California with magnetotellurics in three--dimensions
A three–dimensional (3D) electrical resistivity model of Mono Basin in eastern California unveils a complex subsurface filled with zones of partial melt, fluid–filled fracture networks, cold plutons, and regional faults. In 2013, 62 broadband magnetotelluric (MT) stations were collected in an array around southeastern Mono Basin from which a 3D electrical resistivity model was created with a resol
Authors
Jared R. Peacock, Margaret T. Mangan, Darcy McPhee, David A. Ponce
Science and Products
Filter Total Items: 25
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 that inte
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
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 Mescal Range.
Authors
Kevin Denton, David A. Ponce, Jared R. Peacock, David M. Miller
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 lava fiel
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 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 processing, analysi
Authors
Alison Kirkby, Fei Zhang, Jared R. Peacock, Rakib Hassan, Jingming Duan
Geophysical Characterization of the heat source in the Northwest Geysers, California
The Geysers, in northern California, is the largest energy producing geothermal field in the world. Looking to expand capacity, the operator Calpine Corporation developed an anomalously hot (~400 °C at 2.5 km depth) part of the field in the northwest Geysers, including testing of an enhanced geothermal systems (EGS). Though the area is anomalously hot, geophysical methods have failed to adequately
Authors
Jared R. Peacock, Margaret T. Mangan, Mark Walters, Craig Hartline, Jonathan M.G. Glen, Tait E. Earney, William D. Schermerhorn
Discovery of a blind geothermal system in Southern Gabbs Valley, western Nevada, through application of the play fairway analysis at multiple scales
The Great Basin region is capable of generating much greater amounts of geothermal energy than currently produced. Most geothermal resources in this region are blind, and thus favorable characteristics for geothermal activity must be synthesized and methodologies developed to discover new commercial-grade systems. The geothermal play fairway concept involves integration of multiple parameters indi
Authors
James Faulds, Jason W. Craig, Nicholas H. Hinz, Mark F. Coolbaugh, Jonathan M. Glen, Tait E. Earney, William D. Schermerhorn, Jared R. Peacock, Stephen B. Deoreo, Drew L. Siler
Crustal inheritance and a top-down control on arc magmatism at Mount St Helens
In a subduction zone, the volcanic arc marks the location where magma, generated via flux melting in the mantle wedge, migrates through the crust and erupts. While the location of deep magma broadly defines the arc position, here we argue that crustal structures, identified in geophysical data from the Washington Cascades magmatic arc, are equally important in controlling magma ascent and defining
Authors
Paul A. Bedrosian, Jared R. Peacock, Esteban Bowles-Martinez, Adam Schultz, Graham Hill
Conductivity response to intraplate deformation: Evidence for metamorphic devolatilization and crustal‐scale fluid focusing
We present two‐dimensional electrical resistivity models of two 40 km magnetotelluric (MT) profiles across the Frome Embayment to the east of the northern Flinders Ranges, South Australia. The lower crust shows low resistivity of 10 Ω m at around 30 km depth. The middle crust is dominated by resistive (>1000 Ω m) basement rocks underlying the Flinders Ranges. Adjacent to the ranges, conductive low
Authors
Stephan Thiel, Paul Soeffky, Lars Krieger, Klaus Regenauer-Lieb, Jared R. Peacock, Graham Heinson
Three-dimensional electrical resistivity model of the hydrothermal system in Long Valley Caldera, California, from magnetotellurics
Though shallow flow of hydrothermal fluids in Long Valley Caldera, California, has been well studied, neither the hydrothermal source reservoir nor heat source has been well characterized. Here a grid of magnetotelluric data were collected around the Long Valley volcanic system and modeled in 3-D. The preferred electrical resistivity model suggests that the source reservoir is a narrow east-west e
Authors
Jared R. Peacock, Margaret T. Mangan, Darcy McPhee, Phil E. Wannamaker
Magnetotelluric investigation of the Vestfold Hills and Rauer Group, East Antarctica
The Vestfold Hills and Rauer Group in East Antarctica have contrasting Archean to Neoproterozoic geological histories and are believed to be juxtaposed along a suture zone that now lies beneath the Sørsdal Glacier. Exact location and age of this suture zone are unknown, as is its relationship to regional deformation associated with the amalgamation of East Gondwana. To image the suture zone, magne
Authors
Jared R. Peacock, Katherine Selway
Probabilistic 3-D time-lapse inversion of magnetotelluric data: Application to an enhanced geothermal system
Surface-based monitoring of mass transfer caused by injections and extractions in deep boreholes is crucial to maximize oil, gas and geothermal production. Inductive electromagnetic methods, such as magnetotellurics, are appealing for these applications due to their large penetration depths and sensitivity to changes in fluid conductivity and fracture connectivity. In this work, we propose a 3-D M
Authors
Marina Rosas-Carbajal, Nicolas Linde, Jared R. Peacock, F. I. Zyserman, Thomas Kalscheuer, Stephan Thiel
Imaging the magmatic system of Mono Basin, California with magnetotellurics in three--dimensions
A three–dimensional (3D) electrical resistivity model of Mono Basin in eastern California unveils a complex subsurface filled with zones of partial melt, fluid–filled fracture networks, cold plutons, and regional faults. In 2013, 62 broadband magnetotelluric (MT) stations were collected in an array around southeastern Mono Basin from which a 3D electrical resistivity model was created with a resol
Authors
Jared R. Peacock, Margaret T. Mangan, Darcy McPhee, David A. Ponce