气候变化领域集成服务门户(CCPortal): Potential aeolian deposition of intra-crater layering: A case study of Henry crater, Mars

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DOI	10.1130/B35230.1
	Potential aeolian deposition of intra-crater layering: A case study of Henry crater, Mars
	Day M.D.; Catling D.C.
发表日期	2020
ISSN	167606
起始页码	608
结束页码	616
卷号	132 期号:2021-03-04
英文摘要	Layered deposits occur on Mars in a wide variety of settings and morphologies, including inside craters as large mounds. Many origins have been proposed for these intracrater layered deposits, but recent work has suggested the possibility of deposition by ancient aeolian dunes. Distinguishing dune deposits requires identifying cross-strata which may not be resolvable even with the highest spatial resolution imaging of Mars. In this work, we employ an alternative method and attempt to eliminate the possibility of aeolian deposition by comparing martian layer geometries to the angles and thicknesses of aeolian sets on Earth. Layering in Henry crater falls within the expected bounds for aeolian strata, and if ancient dunes deposited these layers, then the sets record the passage of dunes with 10-100 m spacing that were generally migrating toward the center of the crater. The Henry crater mound comprises ~8000 km3 of sediment, and if all layers reflect dune deposition, we estimate mound deposition would then take at least ~0.5 m.y. As a whole, ~20,000 km3 of sediment are preserved in intra-crater layered deposits in Arabia Terra. Results from this case study of Henry crater suggest that at least some of this volume may be from aeolian dunes, in which case intra-crater layered mounds may host an untapped record of very ancient martian aeolian activity. © 2019 Geological Society of America.
语种	英语
来源期刊	Bulletin of the Geological Society of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/184814
作者单位	Department of Earth, Planetary, and Space Sciences, University of California Los Angeles, 595 Charles Young Drive E, Los Angeles, CA 90095, United States; Department of Earth and Space Sciences, University of Washington, 4000 15th Avenue NE, Johnson Hall Rm-070, Box 351310, Seattle, WA 98195, United States
推荐引用方式 GB/T 7714	Day M.D.,Catling D.C.. Potential aeolian deposition of intra-crater layering: A case study of Henry crater, Mars[J],2020,132(2021-03-04).
APA	Day M.D.,&Catling D.C..(2020).Potential aeolian deposition of intra-crater layering: A case study of Henry crater, Mars.Bulletin of the Geological Society of America,132(2021-03-04).
MLA	Day M.D.,et al."Potential aeolian deposition of intra-crater layering: A case study of Henry crater, Mars".Bulletin of the Geological Society of America 132.2021-03-04(2020).