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论文题目: K-feldspar composition as an exploration tool for pegmatite-type rare metal deposits in Altay, NW China
全部作者: Tang, Yong; Wang, Hong; Zhang, Hui; Lv, Zheng-Hang
第一作者: Tang, Yong
联系作者: ZHANG Hui
刊物名称: JOURNAL OF GEOCHEMICAL EXPLORATION
发表年度: 2018
卷:
期: 185
页码: 130-138
摘要:
Trace elements of potassium feldspar (Kfs) from pegmatite veins in the Keketuohai pegmatite district were determined in situ by LA-ICP-MS. As the K/Rb ratio decreases, the contents of compatible Ba and Sr decrease, while the contents of incompatible Li, Cs and Ga increase. The K/Rb ratios and above mentioned trace element contents of Kfs from the Be-Nb-Ta mineralized pegmatite veins match those of Kfs from barren pegmatite veins. In contrast, the mineralized pegmatites are characterized by having K-feldspars with high phosphorus contents, mostly above 0.1 wt% P2O5, which is the boundary separating mineralized pegmatites and barren pegmatites. The high P2O5 content in Kfs indicates high concentration of this element in the melt from which these pegmatites crystallized. The P2O5 content in K-feldspar can be used as an exploration tool for LCT type Be-Nb-Ta deposit.
论文链接: https://www.sciencedirect.com/science/article/pii/S0375674217302510?via%3Dihub