干旱区生态环境知识资源中心(Arid): The characteristics, formation and exploration progress of the potash deposits on the Khorat Plateau, Thailand and Laos, Southeast Asia

Arid

DOI	10.31035/cg2020009
	The characteristics, formation and exploration progress of the potash deposits on the Khorat Plateau, Thailand and Laos, Southeast Asia
	Shen, Li-jian; Siritongkham, Nuchit
通讯作者	Shen, LJ
来源期刊	CHINA GEOLOGY
ISSN	2096-5192
出版年	2020
卷号	3 期号:1 页码:67-82
英文摘要	The giant potash deposit on the Khorat Plateau is one of the most promising targets for exploitation of potassium salts. So far, many researches and geologic survey have been conducted on the giant potash deposits. Hence, it is necessary to make an overall review on the potash deposits. The potash deposit on the Khorat Plateau was formed during the Middle to Late Cretaceous, during which seawater was enriched in Ca2+ and depleted in SO42- compared with those of modern seawater. In addition to seawater, continental water and hydrothermal fluids could have affected the evaporite basins. The seawater was probably derived from Tethys ocean, and the brine should have evaporated to some extent before entering into the basin systems based on the evidence of absence of carbonates and unproportionate sulphate compared with chloride salts. The paleo-climate during Middle to Late Cretaceous was characterized as high temperature and extremely arid environment, which is favourable for deposition of potassium-magnesium saline minerals. The major saline minerals are of anhydrite, halite, carnallite, sylvite and, tachyhydrite, with trace amounts of borates. The resources of the potash deposit on the Khorat Plateau could be approximately as much as 400x 10(9) t of carnallite and 7x 10(9) t of sylvite. The evaporite sequences have been deformed and altered by postdepositinal processes, including tectonic movements and chemical alteration. Salt domes were formed in the postdepositional processes. Based on the analyses of geophysical surveys and drilling projects, high-quality sylvinite ores are commonly found at the flanks of those salt domes due to incongruent dissolution of carnallite. The future potential prospecting areas for the high-quality sylvinite ores would be on the edges of the Khorat Plateau. (c) 2020 China Geology Editorial Office.
英文关键词	Potash deposit Cretaceous Formation model Seawater Post-depositional alteration Potential exploration target Mineral exploration engineering Thailand Laos Southeast Asia
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	ESCI
WOS记录号	WOS:000536045700007
WOS关键词	SAKHON NAKHON BASIN ; SIMAO BASIN ; EVAPORITES ; MARINE ; ORIGIN ; PALEOGEOGRAPHY ; STRATIGRAPHY ; ISOTOPES ; SYLVITE ; WARMTH
WOS类目	Geology
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/2XILL650/334380
作者单位	[Shen, Li-jian] Chinese Acad Geol Sci, Inst Mineral Resources, Minist Nat Resources, Key Lab Metallogeny & Mineral Assessment, Beijing 100037, Peoples R China; [Siritongkham, Nuchit] Minist Nat Resources & Environm, Dept Mineral Resources, Mineral Resources Div, 75-10 Rama VI Rd, Bangkok 10400, Thailand
推荐引用方式 GB/T 7714	Shen, Li-jian,Siritongkham, Nuchit. The characteristics, formation and exploration progress of the potash deposits on the Khorat Plateau, Thailand and Laos, Southeast Asia[J],2020,3(1):67-82.
APA	Shen, Li-jian,&Siritongkham, Nuchit.(2020).The characteristics, formation and exploration progress of the potash deposits on the Khorat Plateau, Thailand and Laos, Southeast Asia.CHINA GEOLOGY,3(1),67-82.
MLA	Shen, Li-jian,et al."The characteristics, formation and exploration progress of the potash deposits on the Khorat Plateau, Thailand and Laos, Southeast Asia".CHINA GEOLOGY 3.1(2020):67-82.