globalchange  > 气候变化与战略
DOI: 10.1016/j.epsl.2021.117000
论文题名:
Mica kink-band geometry as an indicator of coseismic dynamic loading
作者: Anderson E.K.; Song W.J.; Johnson S.E.; Cruz-Uribe A.M.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2021
卷: 567
语种: 英语
中文关键词: dynamic loading ; earthquake source ; frictional-to-viscous transition ; kink band ; mica ; paleoseismicity
英文关键词: Dynamic loads ; Earthquakes ; Friction ; Mica ; Optical data processing ; Dynamic loadings ; Earthquake source ; Energy partitioning ; Frictional-to-viscous transition ; Kink bands ; Mica ; Micro-structural ; Paleoseismicity ; Shear zone ; Source region ; Deformation ; coseismic process ; dynamic analysis ; exhumation ; geometry ; kink band ; mica ; paleoseismicity ; seismic source ; shear zone ; Indicator indicator
英文摘要: Recognizing that exhumed shear zones had a seismogenic history is an important prerequisite for microstructural studies of energy partitioning in the earthquake source region. Using optical measurements of kinked micas along the Sandhill Corner shear zone, a seismogenic fault/shear zone exhumed from the base of the frictional-to-viscous transition, we demonstrate that their geometric properties are statistically different from kinks in micas that underwent regional deformation and metamorphism. Kink-band asymmetries and the angles of external rotation are larger in rocks from the Sandhill Corner shear zone, whereas kink-band widths are smaller. Our data show remarkable similarities to kink bands from dynamic deformation experiments, meteorite impacts, and nuclear explosion sites, suggesting a dynamic origin for their formation. Our results suggest that mica kink bands may be a useful indicator of dynamic loading and paleoseismicity in the rock record. © 2021 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/165397
Appears in Collections:气候变化与战略

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作者单位: School of Earth and Climate Sciences, University of Maine, Orono, ME 04469, United States

Recommended Citation:
Anderson E.K.,Song W.J.,Johnson S.E.,et al. Mica kink-band geometry as an indicator of coseismic dynamic loading[J]. Earth and Planetary Science Letters,2021-01-01,567
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