Sedimentary Conditions of Evaporites in the Late Jurassic Xiali Formation, Qiangtang Basin: Evidence from Geochemistry Records

doi:10.1111/1755-6724.13069

	Sedimentary Conditions of Evaporites in the Late Jurassic Xiali Formation, Qiangtang Basin: Evidence from Geochemistry Records
	Song, CH (Song, Chunhui)1,2; Zeng, YY (Zeng, Yongyao)1,2,5; Yan, MD (Yan, Maodu)3,4; Fang, XM (Fang, Xiaomin)3,4; Feng, Y (Feng, Ying)1,2; Pan, JQ (Pan, Jiaqiu)1,2; Liu, XF (Liu, Xifang)6,7; Meng, QQ (Meng, Qingquan)1,2; Hu, CH (Hu, Chunhua)1,2; Zhong, SR (Zhong, Sirui)1,2
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2017
卷号	91 期号:1 页码:156-174
关键词	QINGHAI-TIBET PLATEAU STRONTIUM-ISOTOPE STRATIGRAPHY SOURCE-ROCK KITCHENS MARINE SOURCE ROCKS DINOFLAGELLATE CYSTS SEAWATER CHEMISTRY SECULAR VARIATION BELEMNITE ROSTRA FLUID INCLUSIONS OXYGEN-ISOTOPE
DOI	10.1111/1755-6724.13069
文献子类	Article
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.
学科主题	地质学
WOS研究方向	Geology
语种	英语
WOS记录号	WOS:000395768100011
内容类型	期刊论文
源URL	[http://ir.itpcas.ac.cn/handle/131C11/8340]
专题	青藏高原研究所_图书馆
通讯作者	Song, CH
作者单位	1.Lanzhou Univ, Sch Earth Sci, Lanzhou 730000, Peoples R China. 2.Lanzhou Univ, Key Lab Western Chinas Mineral Resources Gansu Pr, Lanzhou 730000, Peoples R China. 3.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China. 4.Chinese Acad Sci, Key Lab Continental Collis & Plateau Uplift, Inst Tibetan Plateau Res, Beijing 100101, Peoples R China. 5.Lanzhou Resources & Environm Voc Tech Coll, Lanzhou, Peoples R China. 6.Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China. 7.Minist Land & Resources, Key Lab Saline Lake Resources & Environm, Beijing 100037, Peoples R China.
推荐引用方式 GB/T 7714	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):156-174.
APA	Song, CH .,Zeng, YY .,Yan, MD .,Fang, XM .,Feng, Y .,...&Song, CH.(2017).Sedimentary Conditions of Evaporites in the Late Jurassic Xiali Formation, Qiangtang Basin: Evidence from Geochemistry Records.ACTA GEOLOGICA SINICA-ENGLISH EDITION,91(1),156-174.
MLA	Song, CH ,et al."Sedimentary Conditions of Evaporites in the Late Jurassic Xiali Formation, Qiangtang Basin: Evidence from Geochemistry Records".ACTA GEOLOGICA SINICA-ENGLISH EDITION 91.1(2017):156-174.