气候变化领域集成服务门户(CCPortal): Stable Rate of Slip Along the Karakax Section of the Altyn Tagh Fault from Observation of Interglacial and Postglacial Offset Morphology and Surface Dating

CCPortal

DOI	10.1029/2019JB018893
	Stable Rate of Slip Along the Karakax Section of the Altyn Tagh Fault from Observation of Interglacial and Postglacial Offset Morphology and Surface Dating
	Peltzer G.; Brown N.D.; Mériaux A.-S.; van der Woerd J.; Rhodes E.J.; Finkel R.C.; Ryerson F.J.; Hollingsworth J.
发表日期	2020
ISSN	21699313
卷号	125 期号:5
英文摘要	Digital elevation maps obtained using TanDEM-X and Pleiades data combined with newly obtained surface age estimates using cosmogenic radionuclide (CRN) and optically simulated luminescence (OSL) methods are used to quantify the slip rate along the western section of the Altyn Tagh Fault in southern Xinjiang. The reconstruction of the conical shape of massive alluvial fans inferred to be from the Eemian (115±7 ka) from CRN dating shows consistent left-lateral offsets of 300±20 m, yielding a slip rate of 2.6±0.3 mm/year. Successive episodes of incision have left cut terraces inset in wide canyons, 10–25 m below the fans' surface. The incision was followed by the deposition of a broad terrace of early Holocene age, which is reincised by modern stream channels. Near the village of Shanxili, a 200 m wide valley is partially dammed by a shutter ridge displaced by the fault. A fill terrace deposited upstream from the ridge has an OSL age of 8.8±0.6 ka. The 23±2 m offset of the riser incising the terrace indicates a minimum postdepositional movement on the fault, yielding a Holocene rate of 2.6±0.5 mm/year, consistent with the 115-ka average slip rate. Scarp degradation analysis using mass diffusion reveals a nonlinear relationship between fault displacement and degradation coefficient along the progressively exposed fault scarp, a pattern suggesting either seismic clustering or variable diffusion rate since the Eemian. Together with the Gozha Co-Longmu Co fault to the south, the Karakax section of the Altyn Tagh Fault contributes to the eastward movement of the western corner of Tibet. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	alluvial fan; Altyn Tagh Fault; cosmogenic radionuclide; geomorphology; optically simulated luminescence; tectonics
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187844
作者单位	Earth, Planetary and Space Sciences, University of California Los Angeles, Los Angeles, CA, United States; Jet Propulsion Laboratory, California Institute of Technology, Padena, CA, United States; Now at Department of Earth and Planetary Science, University of California and Berkeley Geochronology Center, Berkeley, CA, United States; School of Geography, Politics and Sociology, Newcastle University, Newcastle Upon Tyne, United Kingdom; Institut de Physique du Globe de Strasbourg, University of Strasbourg, Strasbourg, France; Department of Geography, University of Sheffield, Sheffield, United Kingdom; LLNL, Livermore, CA, United States; ISTerre, Université Grenoble-Alpes, France
推荐引用方式 GB/T 7714	Peltzer G.,Brown N.D.,Mériaux A.-S.,et al. Stable Rate of Slip Along the Karakax Section of the Altyn Tagh Fault from Observation of Interglacial and Postglacial Offset Morphology and Surface Dating[J],2020,125(5).
APA	Peltzer G..,Brown N.D..,Mériaux A.-S..,van der Woerd J..,Rhodes E.J..,...&Hollingsworth J..(2020).Stable Rate of Slip Along the Karakax Section of the Altyn Tagh Fault from Observation of Interglacial and Postglacial Offset Morphology and Surface Dating.Journal of Geophysical Research: Solid Earth,125(5).
MLA	Peltzer G.,et al."Stable Rate of Slip Along the Karakax Section of the Altyn Tagh Fault from Observation of Interglacial and Postglacial Offset Morphology and Surface Dating".Journal of Geophysical Research: Solid Earth 125.5(2020).