Citation: | LIANG Bin, FU Xiaofang, LI Shihong, TANG Yi, PAN Meng, HAO Xuefeng. 2022. Distribution and occurrence of Cs and other rare elements in contact metamorphic rocks of X03 supergiant deposit in Jiajika, Sichuan and its comprehensive utilization suggestion[J]. Geology in China, 49(4): 1214-1223. doi: 10.12029/gc20220412 |
This paper is the result of mineral exploration engineering.
The Jiajika rare metal mining area is the largest granite pegmatite-type rare metal deposit in China. The recently discovered Vein X03 is an supergiant rare metal deposit dominated by lithium. The tourmaline and cordierite contact metamorphic zones have been developed in the surrounding rocks of Vein X03, and mineralization of rare metals such as Li, Rb, and Cs occurs in the altered rocks. Cs is one of the important rare metal elements, and it is imperative to find more available cesium resources.
In this research, the content of rare elements in the contact metamorphic rock samples in drilled cores, such as tourmaline cornerstone and cordierite schist, was analyzed. The monomineral microanalysis of tourmaline, cordierite, biotite and white mica was conducted using LA-ICP-MS.
High contents of Li, Rb, and Cs in the contact metamorphic rocks were observed, and the average values were 0.296%, 0.067%, and 0.052%, respectively. The contents of these elements reach the boundary grade or the lowest industrial grade for comprehensive utilization, and its characteristics are very similar to those of altered rock cesium mica deposits. Cs element mainly occurs in biotite in the form of isomorphism, which is the main reason for the enrichment of Cs in the contact metamorphic rocks.
In the further exploration of Vein X03, the rare metal resources, especially Cs resources, in the contact metamorphic rocks should be evaluated and comprehensively utilized.
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Simplified geological map of Jiajika rare metal deposit
Geological map(a) and profile(b, c)of X03 vein in Jiajika(after Fu Xiaofang et al., 2019)
Scatter plots of Li, Cs and Rb contents in altered rock
Rare metal content varies with depth from ZK701