| 老挝万象平原钾盐矿床 |
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| 引用本文： | 朱延浙.老挝万象平原钾盐矿床[J].地质与资源,2008,17(1):45-49. |
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| 作者姓名： | 朱延浙 |
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| 作者单位： | 云南省地质矿产勘查开发局, 云南 昆明 650011 |
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| 基金项目： | 国家发展和改革委员会资助项目 |
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| 摘 要： | 经区域地质、区域重力、钻探、岩相古地理及矿床开采技术条件的调查与研究，老挝万象平原钾盐矿具如下特征：含盐地层为古近系塔贡组（E1tg），由膏盐岩与陆源细碎屑岩组成3个明显的沉积旋回，总体为一向北扬起的复式向斜构造；主矿体呈似层状产于塔贡组下段膏盐岩亚段（E1tg1-1）中，埋深78.80~528.30 m（平均272.57 m），厚4.28~237.88 m（平均50.24 m），单工程氯化钾的品位9.70%~30.76%（质量分数，平均15.63%），顶底板均以石盐岩为直接围岩；矿石类型以光卤石矿石为主，钾石盐较少；矿床属碎屑岩系中的钾盐矿床，为海源陆生.
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| 关 键 词： | 老挝 万象平原 钾盐矿床 含盐地层 矿石类型 矿床成因 |
| 文章编号： | 1671-1947(2008)01-0045-05 |
| 收稿时间： | 2007-09-18 |
| 修稿时间： | 2007年9月18日 |
THE POTASH DEPOSITS IN VIENTIANE PLAIN, LAOS |
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| ZHU Yan-zhe.THE POTASH DEPOSITS IN VIENTIANE PLAIN, LAOS[J].Geology and Resources,2008,17(1):45-49. |
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| Authors: | ZHU Yan-zhe |
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| Institution: | Yunnan Bureau of Geology and Mineral Resources Exploration and Development, Kunming 650011, China |
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| Abstract: | Based on investigation and research on the regional geology, gravity, drilling,lithofacies and paleogeography, as well as the mining technology, the characteristics of the potash deposits in Lao Vientiane plain are known as follows: 1) The salt-bearing Paleogene Tagong formation (E1tg) includes three apparent sedimentary cycles, which are composed of salt rock and terrigenous microclastic rock. The strata form a north-rising anticlinorium. 2) The main orebody occurs in the lower sub-member of Tagong formation (E1tg1-1) as bed, with thickness of 4.28 to 237.88 m (averagely 50.24 m), buried in 78.80 to 528.30 m (averagely 272.57 m) deep. The grade of KCl in single drill hole ranges from 9.70% to 30.76% (averagely 15.63%). The direct wallrock is salt rock. 3) The ore is mainly carnallite, with minor sylvite. 4) The deposits belong to ocean-sourced terrestrial potash deposit in clastic rock series. |
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| Keywords: | Laos Vientiane plain potash deposit salt-bearing strata ore type deposit genesis |
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