Arid
DOI10.1016/j.apgeochem.2010.09.005
Hydrochemical characteristics and brine evolution paths of Lop Nor Basin, Xinjiang Province, Western China
Ma, Lichun1,2,3; Lowenstein, Tim K.1; Li, Baoguo3; Jiang, Pingan4; Liu, Chenglin2; Zhong, Junpin4; Sheng, Jiandong4; Qiu, Honglie5; Wu, Hongqi4
通讯作者Lowenstein, Tim K.
来源期刊APPLIED GEOCHEMISTRY
ISSN0883-2927
出版年2010
卷号25期号:11页码:1770-1782
英文摘要

This study was carried out in the Lop Nor basin, a large arid closed drainage basin in Western China. The objective was to contribute to the understanding of the hydrological and hydrochemical processes of the Lop Nor basin by analysis of the chemical composition of different water sources and associated mineralogical characteristics of the playa sediments. The dominant river inflow waters to the Lop Nor basin are of the Na-Mg-Ca-SO4-Cl-HCO3 type. Spring inflow is dominated by Na+ and Cl-. Present-day concentrated groundwater brines vary little in the study area and are consistently rich in Na+ and Cl- and poor in Ca2+ and HCO3-+ CO32-, but also contain a considerable amount of Mg2+ and SO42-. EQL/EVP (equilibrium/evaporation), a brine equilibrium model, simulated evaporation of inflow water and groundwater brines in an open system and showed good agreement between theoretically predicted and observed minerals in the Lop Nor basin. Brine chemical modeling cannot however explain the massive amounts of glauberite (Na2SO4 center dot CaSO4) and polyhalite (K2SO4 center dot MgSO4 center dot 2CaSO(4)center dot 2H(2)O) deposits found in a 230 m deep core ZK1200B from the Lop Nor basin. EQL/EVP simulations under a closed system allowed brine reactions with previously formed minerals and indicate that glauberite forms by back reaction between brine, gypsum and anhydrite and polyhalite forms by reaction between brine and glauberite. Diagenetic textures related to recrystallization and secondary replacement were commonly observed in core ZK1200B, indicating significant mineral-brine interaction during crystallization of glauberite and polyhalite. Mineral assemblages predicted from the evaporation of Tarim river water match closely with natural assemblages and abundances, which can explain the unusual glauberite deposits in the Lop Nor basin. It is suggested that the Tarim river inflow is the dominant source over the lake’s history. The distribution of minerals in the cored sediments documents the history of inflow water response to wet and dry periods in the Lop Nor basin. (C) 2010 Elsevier Ltd. All rights reserved.


类型Article
语种英语
国家USA ; Peoples R China
收录类别SCI-E
WOS记录号WOS:000284678600014
WOS关键词BRISTOL DRY LAKE ; SALT LAKE ; GROUNDWATER ; DESERT ; CALIFORNIA ; PLAYA ; EVAPORATION ; EVAPORITES ; RECHARGE ; ATACAMA
WOS类目Geochemistry & Geophysics
WOS研究方向Geochemistry & Geophysics
来源机构中国农业大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/163234
作者单位1.SUNY Binghamton, Dept Geol Sci, Binghamton, NY 13902 USA;
2.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China;
3.China Agr Univ, Coll Resources & Environm, Beijing 100193, Peoples R China;
4.Xinjiang Agr Univ, Coll Pratacultural & Environm Sci, Urumqi 830052, Peoples R China;
5.Calif State Univ Los Angeles, Coll Nat & Social Sci, Los Angeles, CA 90032 USA
推荐引用方式
GB/T 7714
Ma, Lichun,Lowenstein, Tim K.,Li, Baoguo,et al. Hydrochemical characteristics and brine evolution paths of Lop Nor Basin, Xinjiang Province, Western China[J]. 中国农业大学,2010,25(11):1770-1782.
APA Ma, Lichun.,Lowenstein, Tim K..,Li, Baoguo.,Jiang, Pingan.,Liu, Chenglin.,...&Wu, Hongqi.(2010).Hydrochemical characteristics and brine evolution paths of Lop Nor Basin, Xinjiang Province, Western China.APPLIED GEOCHEMISTRY,25(11),1770-1782.
MLA Ma, Lichun,et al."Hydrochemical characteristics and brine evolution paths of Lop Nor Basin, Xinjiang Province, Western China".APPLIED GEOCHEMISTRY 25.11(2010):1770-1782.
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