气候变化领域集成服务门户(CCPortal): Radiocarbon Dating of Silica Sinter and Postglacial Hydrothermal Activity in the El Tatio Geyser Field

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DOI	10.1029/2020GL087908
	Radiocarbon Dating of Silica Sinter and Postglacial Hydrothermal Activity in the El Tatio Geyser Field
	Munoz-Saez C.; Manga M.; Hurwitz S.; Slagter S.; Churchill D.M.; Reich M.; Damby D.; Morata D.
发表日期	2020
ISSN	0094-8276
卷号	47 期号:11
英文摘要	The El Tatio geothermal field in the Chilean Altiplano contains hydrothermal silica sinter deposits overlaying glacial and volcanic units, providing an opportunity to constrain the timing of deglaciation and volcanic activity in an area with sparse absolute chronologies. We obtained 51 new radiocarbon ages and δ13C values on the organic material trapped in these sinter deposits. Based on the δ13C values, we exclude 29 samples for possible contamination with bacterial mats that incorporate old carbon. We infer that hydrothermal activity initiated ~27 ka ago and has been nearly continuous ever since. The ages of the oldest sinter deposits coincide with ages of moraines that stabilized after the most recent deglaciation. Whereas late Pleistocene sinters are broadly distributed in the field, Holocene deposits are found around active hydrothermal features. Although recent volcanism is absent in the vicinity of El Tatio, persistent hydrothermal discharge implies a long-lived magmatic heat source. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Deposits; Geothermal fields; Silica; Volcanoes; Holocene deposits; Hydrothermal activity; Hydrothermal discharge; Late Pleistocene; Organic materials; Radiocarbon age; Radiocarbon dating; Volcanic activities; Sintering; deglaciation; explosive volcanism; geyser; hydrothermal activity; hydrothermal system; Pleistocene; Postglacial; radiocarbon dating; silica; sinter; volcanism; Altiplano; Antofagasta; Chile; El Tatio; Bacteria (microorganisms)
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/170272
作者单位	Department of Geology and Andean Geothermal Center of Excellence (CEGA), FCFM, Universidad de Chile, Santiago, Chile; Millennium Nucleus for Metal Tracing Along Subduction, FCFM, Universidad de Chile, Santiago, Chile; Department of Earth and Planetary Science, University of California, Berkeley, CA, United States; U.S. Geological Survey, Moffett Field, CA, United States; Department of Geology and Geophysics, Yale University, New Haven, CT, United States
推荐引用方式 GB/T 7714	Munoz-Saez C.,Manga M.,Hurwitz S.,et al. Radiocarbon Dating of Silica Sinter and Postglacial Hydrothermal Activity in the El Tatio Geyser Field[J],2020,47(11).
APA	Munoz-Saez C..,Manga M..,Hurwitz S..,Slagter S..,Churchill D.M..,...&Morata D..(2020).Radiocarbon Dating of Silica Sinter and Postglacial Hydrothermal Activity in the El Tatio Geyser Field.Geophysical Research Letters,47(11).
MLA	Munoz-Saez C.,et al."Radiocarbon Dating of Silica Sinter and Postglacial Hydrothermal Activity in the El Tatio Geyser Field".Geophysical Research Letters 47.11(2020).