Magnetotelluric Investigations of the Kīlauea Volcano, Hawaii

Hoversten, G. Michael; Newman, Gregory A.; Gasperikova, Erika; Kauahikaua, James P.

doi:10.1029/2022jb024418

Cited by 4 publications

(1 citation statement)

References 88 publications

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“…The MT method has been successfully applied for imaging electrical structure in volcanic areas (Hoversten et al., 2022; Ingham et al., 2009; Ogawa et al., 2014; Patro, 2017; Samrock et al., 2018). MT surveys can be helpful to image the pathways of magmatic fluids such as faults and crustal weak zones and locate the magmatic bodies and zones of hydrothermal alteration (Heinson et al., 2006; Sheard et al., 2005; Smith, 2014).…”

Section: Introductionmentioning

confidence: 99%

Electrical Resistivity Imaging of the Northeast Carpathian Volcanic Arc With 3‐D Magnetotellurics Reveals Shallow Hydrothermal System

Neukirch,

Minakov,

Smirnov

et al. 2024

JGR Solid Earth

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The Carpathian belt is one of Europe's major metallogenic provinces, where magmatic ore mineralization is associated with the past subduction environment. The upper crust is mapped for the first time in the Northeast Carpathian Volcanic Arc using magnetotelluric data inversion. The obtained 3‐D electrical resistivity model is interpreted in conjunction with geological information and magnetic anomaly data. The model illustrates the deep magmatic plumbing system including kilometer‐scale plutonic bodies at a depth of 2–7 km. The model implies that the transport of magma and fluids in the uppermost crust was controlled by pre‐existing faults and décollement horizons. Present ore mineralization, mined since historical times, can be attributed to an electrically conductive conduit that is mapped from the surface to a depth of about 30 km. It is suggested that this conduit connected a shallow magmatic chamber to a deep source region in the southeast during late Miocene time. An observed northwest deflection of the deep magmatic conduit at a depth of more than 10 km may explain the spatial gap in the distribution of the Miocene volcanic activity along the Eastern Carpathians.

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Section: Introductionmentioning

confidence: 99%

Electrical Resistivity Imaging of the Northeast Carpathian Volcanic Arc With 3‐D Magnetotellurics Reveals Shallow Hydrothermal System

Neukirch,

Minakov,

Smirnov

et al. 2024

JGR Solid Earth

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Magnetotellurics unveils a hidden caldera complex beneath the Cappadocia Volcanic Province, Central Anatolia, Türkiye

Hacıoğlu,

Başokur,

Meqbel

et al. 2023

Journal of Volcanology and Geothermal Research

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Three-dimensional anisotropic inversion and electrostratigraphic imaging of marine magnetotelluric data to understand the control of crustal deformations by pre-existing lithospheric structures in the Mexican Ridges Fold belt, Southwestern Gulf of Mexico

Meju

Saleh

Karpiah

et al. 2023

Geophysical Journal International

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Summary Three-dimensional (3D) imaging of the lithosphere in the Mexican Ridges fold belt is important for understanding how the crustal deformations in this basin relate to deep tectonic processes and structures inherited from extinct Jurassic seafloor spreading. Here, we use broadband (0.0001–0.4642 Hz) marine magnetotelluric data from the basin to reconstruct the 3D anisotropic resistivities of the lithosphere and their spatial gradients. The resistivity gradients maxima enabled independent definition of important geological boundaries (seen on collocated seismic reflection data) and estimation of crustal thickness. We found anomalous layered zones of low resistivity and high electrical anisotropy at 5-8 km depth (coinciding with the regional detachment zone in Eocene shales in 3D seismic data) and in the upper mantle which we interpret as indicating intense deformation and/or recent magmatic influence. We also found a banded crystalline basement structure across the fossil spreading centre comprising WSW-ENE trending, 6-10 km wide, electrically resistive sub-vertical sheets with conductive and anisotropic borders, which merge into a basal resistive stock-like body at 15-20 km depth. These are cut or bounded by later NNW trending major faults. These WSW and NNW structural trends correlate with the previously interpreted transform and normal faults that formed during the Late Jurassic opening of the Gulf of Mexico only if rotated clockwise by 25–30 degrees. Surprisingly, the rugged thrust-related seabed is offset at the projected positions of the steep resistive-conductive basement sheets (which also have spatially coincident high magnetic intensity and seismicity) enabling us to infer they represent magmatic intrusions facilitated by pre-existing faults. Their conductive borders spatially coincide with possibly fluid-filled vertical fracture-sets in the overlying sediments seen in seismic data which we interpret as hydrothermal fluid pathways. We infer that a magmatic body recently intruded our study area, its ascent controlled by pre-existing basement structures, and influenced the deformation of the Neogene sequences and the seafloor topography.

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Magnetotelluric Investigations of the Kīlauea Volcano, Hawaii

Cited by 4 publications

References 88 publications

Electrical Resistivity Imaging of the Northeast Carpathian Volcanic Arc With 3‐D Magnetotellurics Reveals Shallow Hydrothermal System

Electrical Resistivity Imaging of the Northeast Carpathian Volcanic Arc With 3‐D Magnetotellurics Reveals Shallow Hydrothermal System

Magnetotellurics unveils a hidden caldera complex beneath the Cappadocia Volcanic Province, Central Anatolia, Türkiye

Three-dimensional anisotropic inversion and electrostratigraphic imaging of marine magnetotelluric data to understand the control of crustal deformations by pre-existing lithospheric structures in the Mexican Ridges Fold belt, Southwestern Gulf of Mexico

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