Arid
DOI10.1016/j.jsames.2016.03.004
Distribution of chemical elements in calc-alkaline igneous rocks, soils, sediments and tailings deposits in northern central Chile
Oyarzun, Jorge1; Oyarzun, Roberto2,3; Lillo, Javier3,4,5; Higueras, Pablo3,6; Maturana, Hugo1; Oyarzun, Ricardo1,7
通讯作者Oyarzun, Ricardo
来源期刊JOURNAL OF SOUTH AMERICAN EARTH SCIENCES
ISSN0895-9811
出版年2016
卷号69页码:25-42
英文摘要

This study follows the paths of 32 chemical elements in the arid to semi-arid realm of the western Andes, between 27 degrees and 33 degrees S, a region hosting important ore deposits and mining operations. The study encompasses igneous rocks, soils, river and stream sediments, and tailings deposits. The chemical elements have been grouped according to the Goldschmidt classification, and their concentrations in each compartment are confronted with their expected contents for different rock types based on geochemical affinities and the geologic and metallogenic setting. Also, the element behavior during rock weathering and fluvial transport is here interpreted in terms of the ionic potentials and solubility products. The results highlight the similarity between the chemical composition of the andesites and that of the average Continental Crust, except for the higher V and Mn contents of the former, and their depletion in Mg, Ni, and Cr. The geochemical behavior of the elements in the different compartments (rocks, soils, sediments and tailings) is highly consistent with the mobility expected from their ionic potentials, their sulfates and carbonates solubility products, and their affinities for Fe and Mn hydroxides. From an environmental perspective, the low solubility of Cu, Zn, and Pb due to climatic, chemical, and mineralogical factors reduces the pollution risks related to their high to extremely high contents in source materials (e.g., rocks, altered zones, tailings). Besides, the complex oxyanions of arsenic get bound by colloidal particles of Fe-hydroxides and oxyhydroxides (e.g., goethite), thus becoming incorporated to the fine sediment fraction in the stream sediments. (C) 2016 Elsevier Ltd. All rights reserved.


英文关键词Andean metallogeny Ore deposits Hydrothermal processes Elements mobility Metals pollution Arid basins
类型Article
语种英语
国家Chile ; Spain
收录类别SCI-E
WOS记录号WOS:000378430200003
WOS关键词PORPHYRY COPPER-DEPOSITS ; ELQUI RIVER-BASIN ; STREAM SEDIMENTS ; ATACAMA DESERT ; GOLD DEPOSITS ; HIGH ANDES ; GEOCHEMISTRY ; BELT ; PETROGENESIS ; DISTRICTS
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/2XILL650/194766
作者单位1.Univ La Serena, Fac Ingn, Dept Ingn Minas, Casilla 554, La Serena, Chile;
2.Univ Complutense Madrid, Fac Ciencias Geol, Dept Cristalog & Mineral, E-28040 Madrid, Spain;
3.Univ Castilla La Mancha, Inst Geol Aplicada IGeA, Almaden 13400, Ciudad Real, Spain;
4.Univ Rey Juan Carlos, Escuela Super Ciencias Expt & Tecnol, Tulipen S-N, Mostoles Madrid 28933, Spain;
5.IMDEA Agua, C Punto Net 4, Alcala De Henares 28805, Spain;
6.Univ Castilla La Mancha, Dept Ingn Geol & Minera Almaden, Almaden 13400, Spain;
7.CEAZA, Av Ratin Bitran 1305, La Serena, Chile
推荐引用方式
GB/T 7714
Oyarzun, Jorge,Oyarzun, Roberto,Lillo, Javier,et al. Distribution of chemical elements in calc-alkaline igneous rocks, soils, sediments and tailings deposits in northern central Chile[J],2016,69:25-42.
APA Oyarzun, Jorge,Oyarzun, Roberto,Lillo, Javier,Higueras, Pablo,Maturana, Hugo,&Oyarzun, Ricardo.(2016).Distribution of chemical elements in calc-alkaline igneous rocks, soils, sediments and tailings deposits in northern central Chile.JOURNAL OF SOUTH AMERICAN EARTH SCIENCES,69,25-42.
MLA Oyarzun, Jorge,et al."Distribution of chemical elements in calc-alkaline igneous rocks, soils, sediments and tailings deposits in northern central Chile".JOURNAL OF SOUTH AMERICAN EARTH SCIENCES 69(2016):25-42.
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