Crust structure beneath Jilin Province and Liaoning Province in China based on seismic ambient noise tomography

Pang, Guanghua; Feng, Jikun; Lin, Jun

doi:10.1016/j.jvolgeores.2016.08.007

Cited by 6 publications

(2 citation statements)

References 24 publications

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“…The presence of this midcrustal hot melting zone is supported by (1) a low-velocity zone in the same region (Fig. 2E; Pang et al, 2016), (2) an ∼100 kg/m 3 density decrease at 20-30 km below the JMVF (Suo et al, 2015), and (3) the occurrence of seismicity confined to the upper 12 km of the crust (Fig. 2D).…”

Section: Discussionmentioning

confidence: 79%

Translithospheric magma plumbing system of intraplate volcanoes as revealed by electrical resistivity imaging

Weng

et al. 2021

Geology

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The magma plumbing systems of volcanoes in subduction and divergent tectonic settings are relatively well known, whereas those of intraplate volcanoes remain elusive; robust geophysical information on the magma pathways and storage zones is lacking. We inverted magnetotelluric data to image the magma plumbing system of an intraplate monogenetic volcanic field located above the stagnant Pacific slab in northeast China. We identified a complex, vertically aligned, low-resistivity anomaly system extending from the asthenosphere to the surface consisting of reservoirs with finger- to lens-like geometries. We show that magma forms as CO2-rich melts in a 150-km-deep asthenospheric plume crossing the whole lithosphere as hydrated melt, inducing underplating at 50 km depth, evolving in crustal reservoirs, and erupting along dikes. Intraplate volcanoes are characterized by low degrees of melting and low magma supply rates. Their plumbing systems have a geometry not so different from that of volcanoes in subduction settings.

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Section: Discussionmentioning

confidence: 79%

Translithospheric magma plumbing system of intraplate volcanoes as revealed by electrical resistivity imaging

Weng

et al. 2021

Geology

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“…Some tomographic studies have been carried out to investigate seismic structures of active volcanoes in NE China (X. Fan et al., 2020; Pang et al., 2016). However, due to the relatively low resolution of these models, the fine‐scale mantle structure beneath the LVF has not yet been resolved.…”

Section: Introductionmentioning

confidence: 99%

Three‐Dimensional Electrical Structure and Magma System of the Monogenetic Longgang Volcanic Field, Northeast China, Inferred From Broadband Magnetotelluric Data

Zhao

Zhan

et al. 2022

JGR Solid Earth

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The Longgang volcanic field (LVF) is one of the largest intraplate monogenetic volcanic regions in China, and eruption lasted from the early Pleistocene to the Holocene. Previous research shows that the LVF is not only experiencing rapid surface uplift but also significant seismic activity. The magmatic system under the LVF poses a hazard of potential eruption. The three‐dimensional electrical resistivity model developed by magnetotelluric data shows that the upper crust of the LVF and the surrounding areas hosts a high‐resistivity body composed of volcanic rocks produced by massive eruptions during past volcanic episodes. There are two main high‐conductivity structures below the depth of 10 km in the southwest and northeast of the LVF. The two structures merge in the lower crust and extend to the mantle. We interpret these high‐conductivity structures to be magmatic channels (the resistivity of C1 is 20–50 and C2 is 5–20 Ωm). Magmatic channel upwelling along the C1 may have caused the eruption of the Jinlongdingzi volcano 1,700 years ago. The C2 magmatic channel in the northeast of the LVF is larger and lower resistivity than C1. The modern surface uplift and seismicity in the LVF is a result of upwelling and intrusion along C2 magmatic channel. The Hunjiang fault passing through the LVF may also influence the upwelling of material along the C2 magmatic channel, posing a hazard of future eruption in the LVF. The high‐conductivity structures in the LVF pass through the Moho and extend to the upper mantle and are connected from the top to bottom. Combined with geochemical data, we speculate that the magmatic system in the LVF may directly come from the upper mantle and the magma has experienced rapid ascent with limited crustal internal evolution.

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Three-dimensional S-wave velocity model of the Bohemian Massif from Bayesian ambient noise tomography

2017

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Crust structure beneath Jilin Province and Liaoning Province in China based on seismic ambient noise tomography

Cited by 6 publications

References 24 publications

Translithospheric magma plumbing system of intraplate volcanoes as revealed by electrical resistivity imaging

Translithospheric magma plumbing system of intraplate volcanoes as revealed by electrical resistivity imaging

Three‐Dimensional Electrical Structure and Magma System of the Monogenetic Longgang Volcanic Field, Northeast China, Inferred From Broadband Magnetotelluric Data

Three-dimensional S-wave velocity model of the Bohemian Massif from Bayesian ambient noise tomography

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