Role of Serpentinized Mantle Wedge in Affecting Megathrust Seismogenic Behavior in the Area of the 2010 M = 8.8 Maule Earthquake
Role of Serpentinized Mantle Wedge in Affecting Megathrust Seismogenic Behavior in the Area of the 2010 M = 8.8 Maule Earthquake
复制标题
蛇纹石化地幔楔对 2010 年 M=8.8 马乌莱地震地区巨型逆冲断层孕震行为的影响
DOI:
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发表时间:
2020
影响因子:
5.2
通讯作者:
D. Lange
中科院分区:
文献类型:
--
作者:
Kelin Wang;Taizi Huang;F. Tilmann;S. Peacock;D. Lange
What controls subduction megathrust seismogenesis downdip of the mantle wedge corner (MWC)? We propose that, in the region of the 2010 Mw = 8.8 Maule, Chile, earthquake, serpentine minerals derived from the base of the hydrated mantle wedge exert a dominant control. Based on modeling, we predict that the megathrust fault zone near the MWC contains abundant lizardite/chrysotile‐rich serpentinite that transforms to antigorite‐rich serpentinite at greater depths. From the MWC at 32–40 km depth to at least 55 km, the predominantly velocity‐strengthening megathrust accommodated dynamic propagation of the 2010 rupture but with small slip and negative stress drop. The downdip distribution of interplate aftershocks exhibits a gap around the MWC that can be explained by the velocity‐strengthening behavior of lizardite/chrysotile. Interspersed velocity‐weakening and dynamic weakening antigorite‐rich patches farther downdip may be responsible for increased abundance of aftershocks and possibly for some of the high‐frequency energy radiation during the 2010 rupture.
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影响因子:
5.8
作者:
Brantut, Nicolas;Passelegue, Francois X.;Schubnel, Alexandre
通讯作者:
Schubnel, Alexandre
影响因子:
2.8
作者:
M. Palo;F. Tilmann;F. Krüger;Lutz Ehlert;D. Lange
通讯作者:
M. Palo;F. Tilmann;F. Krüger;Lutz Ehlert;D. Lange
影响因子:
18.3
作者:
Lorito, S.;Romano, F.;Piatanesi, A.
通讯作者:
Piatanesi, A.
影响因子:
3.9
作者:
Lin, Yu-nung Nina;Sladen, Anthony;Socquet, Anne
通讯作者:
Socquet, Anne
影响因子:
2.8
作者:
Drew, Julian;White, Robert S.;Tarasewicz, Jon
通讯作者:
Tarasewicz, Jon