干旱区生态环境知识资源中心(Arid): Deep weathering in the semi-arid Coastal Cordillera, Chile

Arid

DOI	10.1038/s41598-021-90267-7
	Deep weathering in the semi-arid Coastal Cordillera, Chile
	Krone, Laura, V; Hampl, Ferdinand J.; Schwerdhelm, Christopher; Bryce, Casey; Ganzert, Lars; Kitte, Axel; Uebernickel, Kirstin; Dielforder, Armin; Aldaz, Santiago; Oses-Pedraza, Romulo; Perez, Jeffrey Paulo H.; Sanchez-Alfaro, Pablo; Wagner, Dirk; Weckmann, Ute; von Blanckenburg, Friedhelm
通讯作者	Krone, LV (corresponding author), GFZ German Res Ctr Geosci, Potsdam, Germany.
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2021
卷号	11 期号:1
英文摘要	The weathering front is the boundary beneath Earth's surface where pristine rock is converted into weathered rock. It is the base of the critical zone, in which the lithosphere, biosphere, and atmosphere interact. Typically, this front is located no more than 20 m deep in granitoid rock in humid climate zones. Its depth and the degree of rock weathering are commonly linked to oxygen transport and fluid flow. By drilling into fractured igneous rock in the semi-arid climate zone of the Coastal Cordillera in Chile we found multiple weathering fronts of which the deepest is 76 m beneath the surface. Rock is weathered to varying degrees, contains core stones, and strongly altered zones featuring intensive iron oxidation and high porosity. Geophysical borehole measurements and chemical weathering indicators reveal more intense weathering where fracturing is extensive, and porosity is higher than in bedrock. Only the top 10 m feature a continuous weathering gradient towards the surface. We suggest that tectonic preconditioning by fracturing provided transport pathways for oxygen to greater depths, inducing porosity by oxidation. Porosity was preserved throughout the weathering process, as secondary minerals were barely formed due to the low fluid flow.
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000667448600009
WOS关键词	REGOLITH PRODUCTION ; ATACAMA-DESERT ; NORTHERN CHILE ; CRITICAL ZONE ; FAULT ZONE ; EROSION ; OXIDATION ; RATES ; STATE ; POROSITY
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/351734
作者单位	[Krone, Laura, V; Ganzert, Lars; Kitte, Axel; Dielforder, Armin; Aldaz, Santiago; Perez, Jeffrey Paulo H.; Wagner, Dirk; Weckmann, Ute; von Blanckenburg, Friedhelm] GFZ German Res Ctr Geosci, Potsdam, Germany; [Hampl, Ferdinand J.] Tech Univ Berlin, Dept Appl Geochem, Berlin, Germany; [Schwerdhelm, Christopher; Bryce, Casey; Uebernickel, Kirstin] Eberhard Karls Univ Tubingen, Dept Geosci, Tubingen, Germany; [Bryce, Casey] Univ Bristol, Dept Earth Sci, Bristol, Avon, England; [Oses-Pedraza, Romulo] Univ Atacama, CRIDESAT, Copiapo, Chile; [Sanchez-Alfaro, Pablo] Univ Austral Chile, Inst Ciencias Tierra, Valdivia, Chile; [Wagner, Dirk] Univ Potsdam, Inst Geosci, Potsdam, Germany; [von Blanckenburg, Friedhelm] Free Univ Berlin, Inst Geol Sci, Berlin, Germany; [Dielforder, Armin] Leibniz Univ Hannover, Inst Geol, Hannover, Germany
推荐引用方式 GB/T 7714	Krone, Laura, V,Hampl, Ferdinand J.,Schwerdhelm, Christopher,et al. Deep weathering in the semi-arid Coastal Cordillera, Chile[J],2021,11(1).
APA	Krone, Laura, V.,Hampl, Ferdinand J..,Schwerdhelm, Christopher.,Bryce, Casey.,Ganzert, Lars.,...&von Blanckenburg, Friedhelm.(2021).Deep weathering in the semi-arid Coastal Cordillera, Chile.SCIENTIFIC REPORTS,11(1).
MLA	Krone, Laura, V,et al."Deep weathering in the semi-arid Coastal Cordillera, Chile".SCIENTIFIC REPORTS 11.1(2021).