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老挝万象海夏峰钾盐矿床水不溶矿物及其对沉积环境的约束

赵雪, 陈忠, 石国成, 唐启亮, 李雯霞, 张西营. 2023. 老挝万象海夏峰钾盐矿床水不溶矿物及其对沉积环境的约束[J]. 中国地质, 50(1): 170-180. doi: 10.12029/gc20200227001
引用本文: 赵雪, 陈忠, 石国成, 唐启亮, 李雯霞, 张西营. 2023. 老挝万象海夏峰钾盐矿床水不溶矿物及其对沉积环境的约束[J]. 中国地质, 50(1): 170-180. doi: 10.12029/gc20200227001
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

老挝万象海夏峰钾盐矿床水不溶矿物及其对沉积环境的约束

  • 基金项目:
    国家自然科学基金项目(41602086)资助
详细信息
    作者简介: 赵雪, 女, 1993年生, 硕士生, 矿物学、岩石学、矿床学专业; E-mail: 809304141@qq.com
    通讯作者: 张西营, 男, 1977年生, 研究员, 从事钾盐矿产研究工作; E-mail: xyzhchina@isl.ac.cn
  • 中图分类号: P612

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

  • 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
  • 研究目的

    老挝钾盐矿床是世界上重要的钾盐矿床之一,开展该矿床钾盐析出阶段沉积环境研究对于深入理解钾盐成矿作用具有重要意义。

    研究方法

    钾盐矿层中的水不溶矿物比可溶盐类矿物保存了更多的原始信息,是研究成矿卤水演化的重要载体。本文以老挝万象盆地海夏峰矿区ZK16钻孔为研究对象,利用镜下鉴定、XRD及SEM等方法对该钻孔钾盐矿层的水不溶矿物开展了系统研究。

    研究结果

    分析结果表明,水不溶物中的主要矿物为硬石膏、方硼石、水氯硼钙石、石英、白云石、菱镁矿、方解石、白云母等,其中以硬石膏、方硼石是主要的水不溶矿物。自生石英及碎屑白云母的存在及其分布特征指示了钾盐在沉积过程中不同程度地受到陆相水体的影响。

    结论

    综合研究揭示,研究区钾盐沉积可以分为波动沉积、浅水沉积、稳定沉积和改造作用等4个不同阶段。

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  • 图 1  研究区位置及其构造图(据郭远生等,2005)

    Figure 1. 

    图 2  方硼石形貌特征(体视镜,×50)

    Figure 2. 

    图 3  其他水不溶矿物的形貌特征(体视镜,×50)

    Figure 3. 

    图 4  ZK16方硼石颗粒形貌以及SEM-EDS分析结果(图片中黑框为分析区域)

    Figure 4. 

    图 5  ZK16孔主要水不溶矿物组成随深度变化关系

    Figure 5. 

    表 1  海夏峰矿区ZK16主要的矿物组分

    Table 1.  The main mineral components of ZK16 in Haixiafeng mining area

    下载: 导出CSV

    表 2  ZK16方硼石颗粒SEM-EDS元素分析结果

    Table 2.  SEM-EDS element analyzed results of ZK16 boron particles

    下载: 导出CSV
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出版历程
收稿日期:  2020-02-27
修回日期:  2020-08-01
刊出日期:  2023-02-25

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