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2023 Vol. 50, No. 1
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ZHAO Xue, CHEN Zhong, SHI Guocheng, TANG Qiliang, LI Wenxia, ZHANG Xiying. 2023. Insoluble minerals of potash deposits in Haixiafeng mining area of Vientiane, Laos: Constraints on their sedimentary environment[J]. Geology in China, 50(1): 170-180. doi: 10.12029/gc20200227001
Citation: ZHAO Xue, CHEN Zhong, SHI Guocheng, TANG Qiliang, LI Wenxia, ZHANG Xiying. 2023. Insoluble minerals of potash deposits in Haixiafeng mining area of Vientiane, Laos: Constraints on their sedimentary environment[J]. Geology in China, 50(1): 170-180. doi: 10.12029/gc20200227001
shu

Insoluble minerals of potash deposits in Haixiafeng mining area of Vientiane, Laos: Constraints on their sedimentary environment

  • 1.

    Faculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, Yunnan, China

  • 2.

    Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, Qinghai, China

  • 3.

    Qinghai Nuclear Geology, Xining 810008, Qinghai, China

    • Fund Project: Supported by the project of National Natural Science Foundation of China (No.41602086)
More Information
  • Author Bio: ZHAO Xue, female, born in 1993, master candidate, majors in mineralogy, petrology and mineral deposit geology; E-mail: 809304141@qq.com
  • Corresponding author: ZHANG Xiying, male, born in 1977, senior researcher, engaged in studies on potash deposits; E-mail: xyzhchina@isl.ac.cn
Received Date:  27 February 2020
Revised Date:  01 August 2020
Publish Date:  25 February 2023
    Abstract

  • This paper is the result of mineral exploration engineering.

     Objective

    The potash deposit in Laos is one of the most important potash deposits in the world. To carry out studies of the sedimentary environment during the precipitation of potassium minerals is very significant for a deep understanding of the mineralization of potash deposits here.

     Methods

    The insoluble minerals in the potash seams, which can retain more original information than soluble salts, is an important carrier for studying the evolution of ore- forming brine. Systematic studies on insoluble minerals in borehole ZK16 from the Haixiafeng mining area of the Vientiane Basin of Laos were conducted through microscopic identification, XRD, and SEM.

     Results

    Analysis results show that the insoluble materials mainly include anhydrite, boracite, hilgardite, quartz, dolomite, magnesite, calcite, and muscovite, in which anhydrite and boracite are dominant minerals. The existence and distribution characteristics of authigenic quartz and clastic muscovite reveal that continental waters have affected potash deposits to different degrees during deposition.

     Conclusions

    Comprehensive studies show that the process of potassium salt deposition in the study area can be divided into four distinct stages: fluctuation deposition stage, shallow water deposition stage, stable deposition stage, and reworking stage.
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