Origin of the late Cretaceous potash-bearing evaporites in the Vientiane Basin of Laos: delta B-11 evidence from borates

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	Origin of the late Cretaceous potash-bearing evaporites in the Vientiane Basin of Laos: delta B-11 evidence from borates
	Zhang, Xiying1,2 ; Ma, Haizhou1 ; Ma, Yunqi1 ; Tang, Qiliang1 ; Yuan, Xiaolong1
	2013-01-30
发表期刊	JOURNAL OF ASIAN EARTH SCIENCES
卷号	62 页码:812-818
关键词	Vientiane Basin Of Laos Potash-bearing Evaporites Borates Delta B-11 Values
摘要	The evaporites on the Khorat Plateau comprise one of the largest potash deposits in the world, and their origin has long been a controversial problem. Based on boron isotope measurements from borate as a good indicator to distinguish marine and nonmarine evaporites, the borates of potash layers were identified and the results were used to indicate the source of evaporites in the study area as representative of the whole Khorat Plateau. The results show that the main borates include boracite and hilgardite. The boracites occur as crystals and ooids with minor amounts of hilgardite aggregates. The range of delta B-11 values is from +21.30%0 to +32.94%0 (averaging +29.74%0) and falls in the range of marine borates. The delta B-11 values in the potash layer are seemingly variable because of the influence of fluvial influx when salts were precipitating. Although the composition of seawater has possibly been modified, the evidence from boron isotopic composition implies that the evaporites in the study area or in the whole Khorat Plateau are marine deposits. (C) 2012 Elsevier Ltd. All rights reserved.
语种	英语
引用统计
文献类型	期刊论文
条目标识符	http://ir.isl.ac.cn/handle/363002/4427
专题	青海盐湖研究所知识仓储盐湖地质与环境实验室
作者单位	1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China 2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Xiying,Ma, Haizhou,Ma, Yunqi,et al. Origin of the late Cretaceous potash-bearing evaporites in the Vientiane Basin of Laos: delta B-11 evidence from borates[J]. JOURNAL OF ASIAN EARTH SCIENCES,2013,62:812-818.
APA	Zhang, Xiying,Ma, Haizhou,Ma, Yunqi,Tang, Qiliang,&Yuan, Xiaolong.(2013).Origin of the late Cretaceous potash-bearing evaporites in the Vientiane Basin of Laos: delta B-11 evidence from borates.JOURNAL OF ASIAN EARTH SCIENCES,62,812-818.
MLA	Zhang, Xiying,et al."Origin of the late Cretaceous potash-bearing evaporites in the Vientiane Basin of Laos: delta B-11 evidence from borates".JOURNAL OF ASIAN EARTH SCIENCES 62(2013):812-818.