干旱区生态环境知识资源中心(Arid): Naturally elevated arsenic in the Altiplano-Puna, Chile and the link to recent (Mio-Pliocene to Quaternary) volcanic activity, high crustal thicknesses, and geological structures

Arid

DOI	10.1016/j.jsames.2020.102905
	Naturally elevated arsenic in the Altiplano-Puna, Chile and the link to recent (Mio-Pliocene to Quaternary) volcanic activity, high crustal thicknesses, and geological structures
	Tapia, J.; Schneider, B.; Inostroza, M.; Alvarez-Amado, F.; Luque, J. A.; Aguilera, F.; Parra, S.; Bravo, M.
通讯作者	Tapia, J (corresponding author), Univ Catolica Norte, Dept Ciencias Geol, Fac Ingn & Ciencias Geol, Antofagasta, Chile.
来源期刊	JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN	0895-9811
EISSN	1873-0647
出版年	2021
卷号	105
英文摘要	The compilation of water, sediment, rock, and condensed gas data of arsenic (As) in the Altiplano-Puna of Chile reveals a link between its natural enrichment and volcanic activity, high crustal thicknesses, and regional structures. Two zones were studied which encompass the Altiplano-Puna and western lowlands of Chile: the Northern Zone (including Los Pintados, Surire, and Huasco) and Southern Zone (including Pedernales, Grande, and Laguna Verde). A positive correlation was found between average As concentrations in saline and brackish water of salt flats and crustal thicknesses of the two studied zones with heightened values to the east (up to 25 mg.L-1 of dissolved As in water and a 64 km depth to the Mohorovicic discontinuity). Furthermore, in the studied Altiplano-Puna salt flats, surrounding Mio-Pliocene to Quaternary felsic and intermediate volcanic outcrops are abundant and As is well correlated with other dissolved components (e.g. Li and B). Sediments show extreme As values at punctual locations within the Altiplano-Puna, where the crust is thick, recent volcanic and hydrothermal activity is present, and regional faults are found. Volcanic rocks and condensed gas in the Altiplano-Puna are also enriched with As (up to 221 and 1234 mg.kg(-1) respectively). In this tectonic environment, it is hypothesized that volcanism represents an important source of As and the thick continental crust can provide a large reservoir of As that can be leached by rising thermal fluids. Regional scale fault systems also can allow for preferential upwelling and the heightened concentration of As in fractures. Hydrological processes at the surface transport dissolved As to lower elevation regions through groundwater in aquifers and surface water in perennial rivers, creeks, and gorges, diluting element concentrations where significant evapoconcentration is not present.
英文关键词	Arsenic Altiplano-Puna plateau Volcanic activity Hydrothermal fluids Amuyo ponds Salt flats
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000606797900002
WOS关键词	ATACAMA DESERT ; TRACE-ELEMENTS ; NORTHERN CHILE ; CENTRAL ANDES ; HYDROTHERMAL SYSTEMS ; TIBETAN PLATEAU ; DRINKING-WATER ; LATIN-AMERICA ; GROUNDWATER ; EVOLUTION
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/348044
作者单位	[Tapia, J.; Luque, J. A.; Aguilera, F.] Univ Catolica Norte, Dept Ciencias Geol, Fac Ingn & Ciencias Geol, Antofagasta, Chile; [Schneider, B.] Montgomery & Associates, Santiago, Chile; [Inostroza, M.] Univ Catolica Norte, Programa Doctorado Ciencias Menc Geol, Antofagasta, Chile; [Inostroza, M.; Aguilera, F.] Univ Catolica Norte, Nucleo Invest Riesgo Volcan Ckelar Volcanes, Antofagasta, Chile; [Alvarez-Amado, F.] Univ Concepcion, Dept Ciencias Tierra, Concepcion, Chile; [Parra, S.; Bravo, M.] Pontificia Univ Catolica Valparaiso, Inst Quim, Valparaiso, Chile
推荐引用方式 GB/T 7714	Tapia, J.,Schneider, B.,Inostroza, M.,et al. Naturally elevated arsenic in the Altiplano-Puna, Chile and the link to recent (Mio-Pliocene to Quaternary) volcanic activity, high crustal thicknesses, and geological structures[J],2021,105.
APA	Tapia, J..,Schneider, B..,Inostroza, M..,Alvarez-Amado, F..,Luque, J. A..,...&Bravo, M..(2021).Naturally elevated arsenic in the Altiplano-Puna, Chile and the link to recent (Mio-Pliocene to Quaternary) volcanic activity, high crustal thicknesses, and geological structures.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,105.
MLA	Tapia, J.,et al."Naturally elevated arsenic in the Altiplano-Puna, Chile and the link to recent (Mio-Pliocene to Quaternary) volcanic activity, high crustal thicknesses, and geological structures".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 105(2021).