Min Chen

Qinghai University

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Co-Authors

Jiaqi Li

Peking University

Ziyi Xi

Michigan State University

J.D. Burger

Massachusetts Institute of Technology

Tong Zhou

Peking University

Fenglin Niu

Rice University

Samuel C.C. Ting

Massachusetts Institute of Technology

D.G. Fong

University of Maryland, College Park

D. Luckey

ETH Zurich

G. Herten

University of Freiburg

U. Becker

Wesleyan University

Cooperative Institutions

European Organization for Nuclear Research

153

Massachusetts Institute of Technology

145

RWTH Aachen University

129

Institute of High Energy Physics

110

National Institute for Subatomic Physics

103

University of Michigan–Ann Arbor

Radboud University Nijmegen

Deutsches Elektronen-Synchrotron DESY

California Institute of Technology

ETH Zurich

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Applications and discussions of Triangle zones in the North Longmen mountain,Micang mountain and Daba mountain

Inner Mongolia Petrochemical Industry (2008)

Min Chen

Triangle zone is a tectonic style in fold-thrust belt,study in its formation and development pattern,on the one hand,helps to explain the Kinematics of the fold-thrust forward foreland,on the other hand to provide practical examples for interpretation of seismic section,and contribute to the promotion of success ratio in oil and gas exploration.This paper introduce the triangle zone in the North Longmen mountain,Micang mountain and Daba mountain.We compare the surface sections,seismic sections with previous data,and analysis the possibility of the development of the triangle zone in each region.There is triangle zone in Kuangshanliang in the north of Longmen mountain and Michang mountain,but not in Daba Mountain.Longmen mountain and Daba mountain piedmont thrust zone are mainly thin-skinned structures,mainly thrust in jump connection by the Slip layer,Micang mountain are involved in the thick-skinned basement structure,which may be the reasons of the well development of the triangle zone structure.In addition,triangle zone structures formed in late Indo-Chinese epoch may also be damaged by the latter tectonic movements.

Basement

Mountain formation

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EARA2024: A New Radially Anisotropic Seismic Velocity Model for the Crust and Upper Mantle beneath East Asia and Northwestern Pacific Subduction Zones

Geophysical Journal International (2024)

Ziyi Xi Min Chen S. S. Wei Jiaqi Li Tong Zhou

SUMMARY We present a new 3-D radially anisotropic seismic velocity model EARA2024 of the crust and mantle beneath East Asia and the northwestern Pacific using adjoint full-waveform inversion tomography. We construct the EARA2024 model by iteratively minimizing the waveform similarity misfit between the synthetic and observed waveforms from 142 earthquakes recorded by about 2000 broad-band stations in East Asia. Compared to previous studies, this new model renders significantly improved images of the subducted oceanic plate in the upper mantle, mantle transition zone, and uppermost lower mantle along the Kuril, Japan, Izu-Bonin and Ryukyu Trenches. Complex slab deformation and break-offs are observed at different depths. Moreover, our model provides new insights into the origins of intraplate volcanoes in East Asia, including the Changbaishan, Datong-Fengzhen, Tengchong and Hainan volcanic fields.

Seismic anisotropy

Seismic Tomography

Pacific Plate

10.1093/gji/ggae302

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Citations (2)

Identification of two-phased late Paleoproterozoic magmatism in the Wuyishan Domain (SE China): Implications for the tectonic evolution of the Cathaysia Block

Precambrian Research (2021)

Aimei Zhang Liyan Ma Huichuan Liu Yongfeng Cai Min Chen

Supercontinent

Rodinia

Continental arc

10.1016/j.precamres.2021.106093

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Citations (11)

Publisher Correction: Lithospheric foundering and underthrusting imaged beneath Tibet

Nature Communications (2018)

Min Chen Fenglin Niu Jeroen Tromp A. Lenardic Cin‐Ty A. Lee

The original version of the Supplementary Information associated with this Article contained an error in Supplementary Figure 4 in which the colours on the maps rendered incorrectly. The HTML has been updated to include a corrected version of the Supplementary Information.

10.1038/s41467-018-05925-8

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Citations (2)

Mechanisms of deep earthquakes unraveled thanks to unsupervised machine learning

Jiaqi Li Gilbert Mao Thomas P. Ferrand B. X. Zhu Ziyi Xi

Although transformational faulting in the rim of the metastable olivine wedge is hypothesized as a triggering mechanism of deep-focus earthquakes, there is no direct evidence of such rim. Variations of the b value – slope of the Gutenberg-Richter distribution – have been used to decipher triggering and rupture mechanisms of deep earthquakes. However, detection limits prevent full understanding of these mechanisms. Using the Japan Meteorological Agency catalog, we estimate b values of deep earthquakes in the northwestern Pacific Plate, clustered in four regions with unsupervised machine learning. The b-value analysis of Honshu and Izu deep seismicity reveals a kink at magnitude 3.7–3.8, where the b value abruptly changes from 1.4–1.7 to 0.6–0.7. The anomalously high b values for small earthquakes highlight enhanced transformational faulting, likely catalyzed by deep hydrous defects coinciding with the unstable rim of the metastable olivine wedge, the thickness of which we estimate at ∼1 km.

Wedge (geometry)

Deep-focus earthquake

Metastability

10.5194/egusphere-egu23-9809

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Exciton effects on intervalence band transitions in excited Ge

Physical review. B, Solid state (1976)

D. L. Smith Min Chen T. C. McGill

At low temperature, electrons and holes produced by exciting Ge can form excitons. The optical-absorption spectrum which results from transitions between the heavy-hole band and the split-off valence band is significantly modified if the holes involved in the transition are bound in exciton states. We compute the exciton absorption spectrum and compare the result with that computed for free holes and with experiment. At low temperatures, the spectrum computed assuming the holes are bound in excitons is much broader than that computed for free holes and is in better agreement with experiment.

Biexciton

10.1103/physrevb.14.3504

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Citations (4)

Approach the Precision of the DEM Which was Created by the Methods of Quadric Surfaces Moving Fitting Interpolation and Voronoi Chart Interpolation

Surveying and mapping (2012)

Min Chen

DEM(Digital Elevation Model)is a mathematical or digital model of the terrain surface,the different treatment to the expression of the terrain surface may be called surface modeling.In the surface modeling,the surface interpolation is the key of the surface rebuild.In the article,on the one hand two kinds of frequently-used interpolation functions was introduced,on the other hand the author use routine method to judge the precision of the two kinds interpolation methods.

Interpolation

Elevation (ballistics)

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Initial model assessment for intermediate-period full-waveform inversion of the contiguous U.S. and surrounding regions

EarthArXiv (California Digital Library) (2020)

Tong Zhou Min Chen Ziyi Xi Jiaqi Li

Contiguous US is one of regions well instrumented with broadband seismic stations due to the deployment of the EarthScope Transportable Array. Previous studies have provided various 3D seismic wave speed models for the crust and upper mantle with improving resolution. However, discrepancies exist between these models due to the differences in both data sets and tomographic methods, which introduce the uncertainties of the imaged lithospheic structure beneath North America. A further model refinement using the best data coverage and advanced tomographic methods such as full-waveform inversion is expected to provide better seismological constraints. Initial models have significant impacts on the convergence of full-waveform inversions. However, how to select an optimal initial model is not well investigated. Here, we present a data-driven initial model selection procedure for the contiguous US and surrounding regions by examining waveform fitting and misfit functions between the observations and synthetics from candidate models. We use a benchmark data set of waveforms from 30 earthquakes recorded by 5,820 stations across the North America. The results suggest that the tested 3D models well capture long-period waveforms while have discrepancies in short-periods especially on tangential components, indicating that the smaller-scale heterogeneities and radial anisotropy in the crust and upper mantle are not well constrained yet. Based on the data fitting, a hybrid initial model combining S40RTS or S362ANI in the mantle and US.2016 for Vsv and CRUST1.0 for Vsh in the crust is optimal for future full-waveform inversions to achieve higher resolutions of the crust and upper mantle structure.

Benchmark (surveying)

10.31223/x5v599

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Citations (1)

Far-infrared transmission of YBa2Cu3O7−δ thin films with columnar defects

Physica C Superconductivity (1994)

Simon G. Kaplan Min Chen H. D. Drew M. Rajeswari R. Liu

10.1016/0921-4534(94)90310-7

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Citations (4)

Search for charged Higgs, scalar tau's and a test of technicolor models

Physics Letters B (1982)