| 云南中基性火山岩风化壳离子吸附稀土成矿作用分析——以腾冲龙井山安山岩风化壳型稀土矿床为例 |
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| 关键词:intermediate-basic volcanic rock ion adsorption type rare earth mine mineralization Longjingshan, Tengchong Yunnan |
| 基金项目:中国地质调查局地质调查项目“滇西地区三稀等重要矿产地质调查”(编号: DD20179604) |
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| Mineralization of Ion-adsorption Type Rare Earth in Intermediate-basic Volcanic Rocks: A Case Study of Rare Earth Deposits from Longjingshan, Tengchong, Yunnan Province |
| In recent years, many ion-adsorbed-type rare earth (IATRE) ore deposits have been found in Yunnan. Tengchong–Longchuan and Lincang–Menghai have become the most studied and prospected areas for IATRE ore deposits. In this study, a Quaternary intermediate-basic volcanic formation was found in the Longjinghsan area within the southern Tengchong Volcanic Rock Belt. The average abundance of rare earth elements in the formation is 532×10–6. Systematic investigation and sampling of the volcanic formation have shown that the pyroxene andesites in Longjingshan, Tengchong, belong to an IATRE ore deposit rich in light rare earth elements, which formed from young volcanic rocks. The orebody has an average thickness of 9.15 m, and an average grade (total rare earth element oxides, TREEO) of 0.11%, which varies from the average grade. The thickness of the orebodies is positively correlated with the thickness of the weathering shelf of the volcanic rocks. The discovery of an IATRE ore deposit in the Tengchong area adds to the types of rare earth ore deposits in Yunnan. The geological setting and geochemical characteristics of the young intermediate-basic volcanic rare earth ore deposit illustrates that rare earth deposits are related to intermediate-basic volcanic rock. |
| ZENG Zhao-jin,ZHU Xiang-ping,ZHANG Bin,GAO Ru-dong.2021.Mineralization of Ion-adsorption Type Rare Earth in Intermediate-basic Volcanic Rocks: A Case Study of Rare Earth Deposits from Longjingshan, Tengchong, Yunnan Province[J].Acta Geoscientica Sinica,42(6):936-944. |
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