罗璐, 周总瑛, 朱霞, 等. 西藏南部地热型锂资源特征与分布规律[J]. 矿产综合利用, 2024, 45(4): 35-42. DOI: 10.3969/j.issn.1000-6532.2024.04.005
    引用本文: 罗璐, 周总瑛, 朱霞, 等. 西藏南部地热型锂资源特征与分布规律[J]. 矿产综合利用, 2024, 45(4): 35-42. DOI: 10.3969/j.issn.1000-6532.2024.04.005
    LUO Lu, ZHOU Zongying, ZHU Xia, et al. Characteristics and distribution of geothermal-type lithium resources in southern xizang[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(4): 35-42. DOI: 10.3969/j.issn.1000-6532.2024.04.005
    Citation: LUO Lu, ZHOU Zongying, ZHU Xia, et al. Characteristics and distribution of geothermal-type lithium resources in southern xizang[J]. Multipurpose Utilization of Mineral Resources, 2024, 45(4): 35-42. DOI: 10.3969/j.issn.1000-6532.2024.04.005

    西藏南部地热型锂资源特征与分布规律

    Characteristics and Distribution of Geothermal-type Lithium Resources in Southern Xizang

    • 摘要: 这是一篇矿业工程领域的论文。西藏南部是我国高温地热带的主要分布区之一,拥有丰富的地热资源。地热水化学分析测试结果显示,西藏南部高温地热带地热水中的锂含量最高可达34.51 mg/L,地热锂的相对丰度明显优于北美西部高原的克莱顿谷和南美安第斯高原的乌尤尼等世界典型的高原型盐湖卤水锂的相对丰度的盐湖卤水,镁锂比大部分小于3,有利于卤水提锂。西藏南部高温地热带地热水中锂含量较高的区域均分布在雅鲁藏布江缝合带及其以南地区,与富锂岩石的分布范围一致,同时雅鲁藏布江缝合带及其以南地区地热水的Cl-Na型地热水比北部的更多,南部地热水的TDS更高,循环路径更长。根据地热水的氢氧稳定同位素和周围富锂盐湖卤水中锂的物源推断了地热水锂的物源主要有两种,分别是地热水对富锂岩石的溶滤作用和岩浆分异过程中形成的富锂岩浆热液。

       

      Abstract: This is an article in the field of mining engineering. The Southern Xizang is one of the main distribution areas of high temperature geothermal zones in China with rich geothermal resources. The chemical analysis and test results of the geothermal water show that the lithium content in the geothermal water of the high temperature geothermal zone in Southern Xizang can reach 34.51 mg/L, and the relative abundance of geothermal lithium is obviously better than that of the world's typical plateau Salt Lake brines, such as Clayton Valley in the Western Plateau of North America and Uyuni in the Andes Plateau of South America. The lithium magnesium ratio is mostly less than 3, which is conducive to lithium extraction from brine. The areas with high lithium content in the geothermal water of the high temperature geothermal zones in Southern Xizang are all distributed in the the Yarlung Zangbo River suture zone and the areas to the south, consistent with the distribution range of lithium rich rocks. At the same time, the Yarlung Zangbo River suture zone and its south area have more Cl-Na geothermal water than the north, and the south has higher TDS and longer circulation path. Based on the stable isotopic composition of hydrogen and oxygen in geothermal water and the provenance of lithium in the surrounding lithium-rich Salt Lake brine, it is inferred that the main sources of lithium in the geothermal water are leaching of lithium-rich rocks by geothermal water and lithium-rich magmatic hydrothermal solutions formed during magmatic differentiation.

       

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