Magnetic evidence of seismic fluid processes along the East Yibug Chaka Fault, Tibet

Liu，Dongliang1,2,3; Ferré，Eric C.3; Li，Haibing1,2; Chou，Yu Min4; Wang，Huan1,2; Horng，Chorng Shern5; Sun，Zhiming6; Pan，Jiawei1,2; Chevalier，Marie Luce1,2; Zheng，Yong1,2; Ge，Chenglong1; Liu，Fucai1

2022-09-05

10.1016/j.tecto.2022.229500

TECTONOPHYSICS   Impact Factor & Quartile

0040-1951

1879-3266

Magnetic mineral assemblages record physical and chemical changes that occur during and after seismic events with large slips. For example, previous studies have reported that siderite, a common phase in carbonate rocks and a cement in noncarbonate rocks, breaks down to neoformed magnetite due to seismic friction or fluid related to earthquakes and high-velocity activities. Seismic magnetic mineral transformation of siderite to hematite, while also possible, is less common. Here, we present new rock magnetism and X-ray diffraction data to assess the magnetic mineral assemblage and mineral reactions along the East Yibug Chaka Fault, Tibetan Plateau. These data from well-exposed outcrops document the presence of siderite, magnetite and hematite. We show that abundant magnetite is neoformed during historic seismic fluid processes due to the breakdown of siderite at ~300–400 °C and that hematite forms from magnetite and siderite through subsequent interaction with interseismic fluids and/or Earth surface weathering.

East Yibug Chaka Fault Fault rock magnetism Seismic fluid processes Tibet X-ray diffraction

EI ; SCI

English

Others

China Scholarship Council[201809110053];Ministry of Science and Technology[2019QZKK0901];Ministry of Science and Technology[2021FY100104];National Natural Science Foundation of China[2021FY100104];National Natural Science Foundation of China[41830217];National Natural Science Foundation of China[41872212];National Natural Science Foundation of China[41941016];China Geological Survey[DD20221630];National Natural Science Foundation of China[DD20221630];

Geochemistry & Geophysics

Geochemistry & Geophysics

WOS:000893932900003

ELSEVIER

20223112453186

Earthquakes ; Hematite ; Magnetism ; Magnetite ; Rocks ; Weathering

Minerals:482.2 ; Seismology:484 ; Magnetism: Basic Concepts and Phenomena:701.2

GEOSCIENCES

2-s2.0-85134875282

Scopus

1.Key Laboratory of Deep-Earth Dynamics of Ministry Natural Resources,Institute of Geology,Chinese Academy of Geological Sciences,Beijing,100037,China
2.Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou),Guangzhou,511458,China
3.School of Geosciences,University of Louisiana at Lafayette,Lafayette,70504,United States
4.Department of Ocean Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.Institute of Earth Sciences,Academia Sinica,Taipei,128, Sec. 2, Academia Road, Nankang,115,Taiwan
6.Key Laboratory of Paleomagnetism of Chinese Academy of Geological Sciences,Institute of Geomechanics,Chinese Academy of Geological Sciences,Beijing,100081,China

Liu，Dongliang,Ferré，Eric C.,Li，Haibing,et al. Magnetic evidence of seismic fluid processes along the East Yibug Chaka Fault, Tibet[J]. TECTONOPHYSICS,2022,838.

Liu，Dongliang.,Ferré，Eric C..,Li，Haibing.,Chou，Yu Min.,Wang，Huan.,...&Liu，Fucai.(2022).Magnetic evidence of seismic fluid processes along the East Yibug Chaka Fault, Tibet.TECTONOPHYSICS,838.

Liu，Dongliang,et al."Magnetic evidence of seismic fluid processes along the East Yibug Chaka Fault, Tibet".TECTONOPHYSICS 838(2022).