气候变化领域集成服务门户(CCPortal): Emerged Coral Reefs Record Holocene Low-Angle Normal Fault Earthquakes

CCPortal

DOI	10.1029/2020GL089301
	Emerged Coral Reefs Record Holocene Low-Angle Normal Fault Earthquakes
	Biemiller J.; Taylor F.; Lavier L.; Yu T.-L.; Wallace L.; Shen C.-C.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:20
英文摘要	Low-angle normal faults (LANFs; dip <30°) accommodate kilometers of crustal extension, yet it remains unclear whether these faults can host large earthquakes or if they predominantly creep aseismically. Most active LANFs typically slip at rates of <3 mm/year. Here, we report U-Th ages from a series of distinct levels of formerly shallow-living corals killed by uplift-induced emergence of the footwall of one of the world's fastest-slipping LANFs, the Mai'iu fault in Papua New Guinea, which slips at rates of 8–12 mm/year. Coral ages and coastal morphology indicate punctuated episodic uplift events consistent with seismic slip on the Mai'iu fault. Maximum episodic uplift increments of 0.5–1.8 m imply earthquakes of Mw > 7. We present the first coral paleoseismological record of normal fault earthquakes, which constrain the timing and surface uplift patterns of multiple LANF seismic cycles and confirm that LANFs can slip in large (Mw > 7) earthquakes. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Binary alloys; Earthquakes; Morphology; Thorium alloys; Uranium alloys; Coastal morphology; Coral reef; Crustal extension; Holocenes; Large earthquakes; Normal faults; Papua New Guinea; Seismic slips; Fault slips; coastal morphology; coral reef; creep; earthquake magnitude; episodic event; footwall; Holocene; normal fault; uplift; uranium-lead dating; Papua New Guinea; Anthozoa
语种	英语
来源期刊	Geophysical Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/169543
作者单位	Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; High-Precision Mass Spectrometry and Environment Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei, Taiwan; GNS Science, Lower Hutt, New Zealand; National Industry and Engineering Research Center, National Academy of Marine Research, Kaohsiung, Taiwan; Research Center for Future Earth, National Taiwan University, Taipei, Taiwan
推荐引用方式 GB/T 7714	Biemiller J.,Taylor F.,Lavier L.,et al. Emerged Coral Reefs Record Holocene Low-Angle Normal Fault Earthquakes[J],2020,47(20).
APA	Biemiller J.,Taylor F.,Lavier L.,Yu T.-L.,Wallace L.,&Shen C.-C..(2020).Emerged Coral Reefs Record Holocene Low-Angle Normal Fault Earthquakes.Geophysical Research Letters,47(20).
MLA	Biemiller J.,et al."Emerged Coral Reefs Record Holocene Low-Angle Normal Fault Earthquakes".Geophysical Research Letters 47.20(2020).