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题名: Sedimentary Conditions of Evaporites in the Late Jurassic Xiali Formation, Qiangtang Basin: Evidence from Geochemistry Records
作者: Song, CH; Zeng, YY; Yan, MD; Fang, XM; Feng, Y; Pan, JQ; Liu, XF; Meng, QQ; Hu, CH; Zhong, SR
收录类别: SCIE
出版日期: 2017-02
刊名: ACTA GEOLOGICA SINICA-ENGLISH EDITION
卷号: 91, 期号:1-1, 页码:156-174
期刊主办单位: 中国地质学会
出版者: WILEY
出版地: HOBOKEN
英文摘要: The Qiangtang Basin (QB), located in the central Tibetan Plateau, is a Jurassic marine basin and one of the most important prospective salt resource belts in China. In recent decades, many outcrops of gypsiferous bed have been found in the Jurassic marine strata in the basin. Salt springs with abnormally high sodium (Na+) contents had been identified in the Late Jurassic Xiali Formation (Fm.) in the basin in the last years. However, to date, no potash or halite deposits have been identified in the QB. Gypsum outcrops and salt springs are very important signs in the investigation of halite and potash deposits. Therefore, the Xiali Fm. is a potentially valuable layer to evaluate for the possible presence of halite and potash deposits in the basin. However, few studies have explored the formation conditions of evaporites in the unit. Here, we present detailed geochemical records from the Yanshiping section related to the study of the formation conditions of evaporites in the Xiali Fm. of the QB. Climate proxies based on the obviously increased anion concentrations of SO42- and Cl- and the significant correlation coefficients of Ca2+-SO42- (R = 0.985) and Na+-Cl- (R = 0.8974) reveal that the upper member of the Xiali Fm. (the upper Xiali Fm.) formed under an arid climate and evolved into the sulfate phase or early chloride phase. Provenance proxies based on the obviously increased K+ and Na+ ion concentrations and the significant correlation coefficient of Na+-Cl- (R = 0.8974) suggest that the upper Xiali Fm. featured optimal provenance conditions for the possible formation of halite deposits. The regression and the semi-closed tidal flat environment in the upper Xiali Fm. were favorable for the formation of potash and halite deposits. The low Mg2+ /Ca2+ values (mean value = 1.82) and significant Na+-Cl- correlation coefficient (R = 0.8974) also suggest that the upper Xiali Fm. is the layer most likely to contain potential halite deposits. In addition, the macroscopic correlations of tectonism, provenance, paleoclimate, saliferous strata and sedimentary environment between the QB and the adjoining Amu Darya Basin in Central Asia reveal that the two basins shared similar geologic settings that were favorable for the formation of evaporites during the Late Jurassic. Therefore, the upper Xiali Fm. is a valuable layer to explore for halite deposit and may be potentially valuable in the future exploration for potash deposits in the QB.
关键词: Evaporites ; geochemistry ; Late Jurassic ; Xiali Formation ; Qiangtang Basin
作者部门: [Song, Chunhui ; Zeng, Yongyao ; Feng, Ying ; Pan, Jiaqiu ; Meng, Qingquan ; Hu, Chunhua ; Zhong, Sirui] Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China ; [Song, Chunhui ; Zeng, Yongyao ; Feng, Ying ; Pan, Jiaqiu ; Meng, Qingquan ; Hu, Chunhua ; Zhong, Sirui] Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Peoples R China ; [Yan, Maodu ; Fang, Xiaomin] Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China ; [Yan, Maodu ; Fang, Xiaomin] Chinese Acad Sci, Key Lab Continental Collis & Plateau Uplift, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China ; [Zeng, Yongyao] Lanzhou Resources & Environm Voc Tech Coll, Lanzhou, Peoples R China ; [Liu, Xifang] Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China ; [Liu, Xifang] Minist Land & Resources, Key Lab Saline Lake Resources & Environm, Beijing 100037, Peoples R China
通讯作者: Song, CH (reprint author), Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China. ; Song, CH (reprint author), Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Peoples R China.
学科分类: Geology
文章类型: Article
所属项目编号: National Basic Research Program of China [2011CB403003, 2013CB956403] ; "Strategic Priority Research Program" of the Chinese Academy of Sciences [XDB03020402] ; National Natural Science Foundation of China [41272128] ; College Research Program of Gansu Province [2016A-123]
所属项目名称: 国家自然科学基金项目 ; 国家重点基础研究发展计划以及国家重大科学研究计划(973计划) ; 甘肃省教育厅资助项目
项目资助者: NSFC ; MOST ; GSED
语种: 英语
DOI: 10.1111/1755-6724.13069
ISSN号: 1000-9515
WOS记录号: WOS:000395768100011
IR记录号: WOS:000395768100011
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内容类型: 期刊论文
URI标识: http://ir.lzu.edu.cn/handle/262010/189144
Appears in Collections:地质科学与矿产资源学院_期刊论文

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Recommended Citation:
Song, CH,Zeng, YY,Yan, MD,et al. Sedimentary Conditions of Evaporites in the Late Jurassic Xiali Formation, Qiangtang Basin: Evidence from Geochemistry Records[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2017,91(1-1):156-174.
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