| 老挝万象盆地钾盐矿床微量元素地球化学特征及矿床的成因 |
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| 引用本文： | 李善平,马海州,陈有顺,王生祖,李五福,王钦元.老挝万象盆地钾盐矿床微量元素地球化学特征及矿床的成因[J].中国区域地质,2010(5):760-770. |
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| 作者姓名： | 李善平 马海州 陈有顺 王生祖 李五福 王钦元 |
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| 作者单位： | [1]青海省地质矿产研究所,青海西宁810012 [2]青海省地质调查院,青海西宁810012 [3]中国科学院青海盐湖研究所,青海西宁810008 [4]青海省地震局,青海西宁810001 [5]青海省公路科研勘测设计院,青海西宁810007 |
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| 基金项目： | 云南中寮矿业开发投资有限公司《老挝万象钾盐矿床补充勘探》项目资助
致谢：本文是《万象通芒矿段钾盐矿床补充勘探地质总结报告》的一部分,参加野外工作的还有山发寿、高东林、唐启亮、程怀德、曾金波、徐黎明、王相明、王明祥、李海军和云南中寮矿业开发投资有限公司何勇、黄昆林、高松、闫广文等,在此一并表示感谢! |
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| 摘 要： | 老挝万象盆地钾镁盐矿主要富集在塔贡组下段膏盐中,主要由石盐岩、光卤石、钾石盐、含光卤石钾石盐及少量溢晶石等组成,属单层结构类型。钾镁盐矿中的微量元素Br、Rb和氯化物有直接的关系,是在万象盆地内找钾的直接标志,可在不同程度上反映原始盐溶液的浓缩发展过程。而Sr、B地球化学性质稳定,随卤水浓度的增高而富集在卤液中,可间接指示含钾的层位。证实了万象盆地的卤水来源于南部呵叻盆地,并有地表水体及深部卤水补给的可能性。研究万象盆地元素的地球化学特征,对丰富古代固体钾盐成矿理论、指导兰坪-思茅盆地蒸发岩研究及找钾工作具有重要的指示意义。
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| 关 键 词： | 万象盆地 钾盐矿床 元素地球化学 兰坪-思茅盆地 矿床成因 |
Geochemistry and genesis of trace elements from potash deposit in Vientiane basin, Laos |
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| LI Shan-ping,MA Hai-zhou,CHEN You-shun,WANG Sheng-zu,LI Wu-fu,WANG Qin-yuan.Geochemistry and genesis of trace elements from potash deposit in Vientiane basin, Laos[J].Regional Geology of China,2010(5):760-770. |
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| Authors: | LI Shan-ping MA Hai-zhou CHEN You-shun WANG Sheng-zu LI Wu-fu WANG Qin-yuan |
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| Institution: | 1. Qinghai Institute of Geology and Mineral Resources,Xining 810012, Qinghai, China; 2. Qinghai Institute of Geological Survey,Xining 810012, Qinghai, China; 3. Qinghai Institute of Salt Lakes of Chinese Academy of Sciences,Xining 810008, Qinghai, China; 4. Qinghai Seismological Bureau,Xining 810001, Qinghai, China; 5. Qinghai Highway Survey and Design Institute Research,Xining 810007, Qinghai, China ) |
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| Abstract: | Potassium and magnesium salt deposit mainly enriches in the lower gypsum rock salt segment of Tagong Formation in Vientiane basin, Laos. The deposit is mainly composed of salt rock, carnallite, potassium salt, carnallite bearing potassium and a small amount of spar etc, and it belongs to single-layer structure. Trace elements of potassium and magnesium salt deposit such as Br and Rb are directly related to chloride, and therefore work as sign of potassium deposit prospecting in the Vientiane basin. These elements can reflected the development process of the original concentration of salt solution in certain degree. Sr and B with stable geochemical nature concentrate in the brine solution with the increase of brine concentration, so they may be indicative for potassium layer. It is confirm that the Vientiane basin brine comes from the southern Khorat basin by the analysis of trace elements, and it＇s possible that there is also surface water from deep fracture brine supply. This conclusion can be quite helpful to enrich the ancient solid potassium salt mineralization theory and to guide the research of Lanping-Simao basin evaporite salt and other potash deposits prospecting. |
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| Keywords: | Vientiane basin potassium salt deposit element geochemistry Lanping-Simao basin genesis of deposit |
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