气候变化领域集成服务门户(CCPortal): Non-double-couple earthquakes in 2017 swarm in Reykjanes Peninsula, SW Iceland: Sensitive indicator of volcano-tectonic movements at slow-spreading rift

CCPortal

DOI	10.1016/j.epsl.2021.116875
	Non-double-couple earthquakes in 2017 swarm in Reykjanes Peninsula, SW Iceland: Sensitive indicator of volcano-tectonic movements at slow-spreading rift
	Hrubcová P.; Doubravová J.; Vavryčuk V.
发表日期	2021
ISSN	0012821X
卷号	563
英文摘要	The analysis of the 2017 earthquake swarm along the obliquely divergent Reykjanes Peninsula plate boundary revealed the most frequent focal mechanisms corresponding to main activated fault, which relates to transform faulting of the North Atlantic Rift in Iceland. Detailed double-difference locations, focal mechanisms and non-double-couple (non-DC) volumetric components of seismic moment tensors indicate an activation of three fault segments suggesting continuous interactions between tectonic and magmatic processes. They are related to inflation/deflation of a vertical magmatic dike and comprise: (1) shearing at strike-slip transform fault with left lateral motion; (2) collapses at normal faulting with negative volumetric components due to magma/fluid escape, and (3) shear-tensile opening at oblique strike-slip faulting with positive volumetric components connected to flow of trapped over-pressurized fluids. The identification of three regimes of complex volcano-tectonic evolution in divergent plate movement proves an enormous capability of the non-DC volumetric components to map tectonic processes in such settings. © 2021 The Author(s)
关键词	earthquake swarm focal mechanisms moment tensor non-double-couple components Reykjanes Peninsula SW Iceland volcano-tectonic evolution
英文关键词	Fault slips; Hydraulic structures; Shear flow; Strike-slip faults; Tensors; Volcanoes; Divergents; Earthquake swarms; Focal mechanism; Icelands; Moment tensors; Non-double-couple component; Reykjane peninsula SW iceland; Tectonic process; Volcano-tectonic evolution; Volumetric components; Earthquakes; earthquake event; earthquake swarm; focal mechanism; moment tensor; plate boundary; plate motion; rifting; seismic moment; seismotectonics; strike-slip fault; tectonic evolution; tectonic setting; Iceland; Reykjanes Peninsula; Indicator indicator
语种	英语
来源期刊	Earth and Planetary Science Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/203138
作者单位	Institute of Geophysics, Czech Academy of Sciences, Prague, Czech Republic
推荐引用方式 GB/T 7714	Hrubcová P.,Doubravová J.,Vavryčuk V.. Non-double-couple earthquakes in 2017 swarm in Reykjanes Peninsula, SW Iceland: Sensitive indicator of volcano-tectonic movements at slow-spreading rift[J],2021,563.
APA	Hrubcová P.,Doubravová J.,&Vavryčuk V..(2021).Non-double-couple earthquakes in 2017 swarm in Reykjanes Peninsula, SW Iceland: Sensitive indicator of volcano-tectonic movements at slow-spreading rift.Earth and Planetary Science Letters,563.
MLA	Hrubcová P.,et al."Non-double-couple earthquakes in 2017 swarm in Reykjanes Peninsula, SW Iceland: Sensitive indicator of volcano-tectonic movements at slow-spreading rift".Earth and Planetary Science Letters 563(2021).