气候变化领域集成服务门户(CCPortal): The susceptibility of Oklahoma’s basement to seismic reactivation

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DOI	10.1038/s41561-019-0440-5
	The susceptibility of Oklahoma’s basement to seismic reactivation
	Kolawole F.; Johnston C.S.; Morgan C.B.; Chang J.C.; Marfurt K.J.; Lockner D.A.; Reches Z.; Carpenter B.M.
发表日期	2019
ISSN	17520894
卷号	12 期号:10
英文摘要	Recent widespread seismicity in Oklahoma is attributed to the reactivation of pre-existing, critically stressed and seismically unstable faults due to decades of wastewater injection. However, the structure and properties of the reactivated faults remain concealed by the sedimentary cover. Here, we explore the major ingredients needed to induce earthquakes in Oklahoma by characterizing basement faults in the field, in seismic surveys and via rock-mechanics experiments. Outcrop and satellite mapping reveal widespread fault and fracture systems with trends that display a marked similarity to the trends of recent earthquake lineaments. Our three-dimensional seismic analyses show steeply dipping basement-rooted faults that penetrate the overlying sedimentary sequences, representing pathways for wastewater migration. Experimental stability analysis indicates that Oklahoma’s basement rocks become seismically unstable at conditions relevant to the dominant hypocentral depths of the recent earthquakes. These analyses demonstrate that the geometry, structure and mechanical stability of Oklahoma’s basement make it critically susceptible to seismic reactivation. © 2019, The Author(s), under exclusive licence to Springer Nature Limited.
语种	英语
scopus关键词	basement rock; earthquake event; earthquake hypocenter; induced seismicity; lineament; seismic migration; seismicity; stability analysis
来源期刊	Nature Geoscience
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/124592
作者单位	School of Geosciences, University of Oklahoma, Norman, OK, United States; Hawaiian Volcano Observatory, United States Geological Survey, Hawaii National Park, HI, United States; United States Geological Survey, Menlo Park, CA, United States; Chesapeake Energy Corporation, Oklahoma City, OK, United States
推荐引用方式 GB/T 7714	Kolawole F.,Johnston C.S.,Morgan C.B.,等. The susceptibility of Oklahoma’s basement to seismic reactivation[J],2019,12(10).
APA	Kolawole F..,Johnston C.S..,Morgan C.B..,Chang J.C..,Marfurt K.J..,...&Carpenter B.M..(2019).The susceptibility of Oklahoma’s basement to seismic reactivation.Nature Geoscience,12(10).
MLA	Kolawole F.,et al."The susceptibility of Oklahoma’s basement to seismic reactivation".Nature Geoscience 12.10(2019).