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| Shallow Response to the Deep REE Mineralization in the Maoniuping Giant REE Deposit in the Eastern Tibet Plateau |
| XU De-ru1,2, JIAO Qian-qian3*, CHEN Gen-wen2*, YANG Jian-xing2, SHAN Qiang2, WANG Fei-rong4, ZHOU Hong-wu4 |
1. State Key Laboratory for Nuclear Resources and Environment, East China University of Technology,Nanchang 330013, China;
2. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences,Guangzhou 510640, China;
3. College of Land and Resource Engineering, Kunming University of Science and Technology,Kunming 650093, China;
4. Coalfield Geological Survey Institute of Jiangxi Province,Nanchang 330013, China |
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Abstract The Maoniuping REE deposit, located in the Mianning-Dechang REE metallogenic belt in the eastern Tibetan Plateau, is ranked the third one of carbonatite-type REE deposits in the world. However, the REE resources in the shallow level are rapidly decreased because of mining in many years. Therefore, it is urgently needed to carry out the exploration of REE resources in the depth and periphery of the deposit in order to ensure the REE resource security supply. Based on the data integration of the detailed geological survey, the mineral components and geochemical characteristics of surface far-field alteration minerals, and geophysical characteristics for geological bodies in the depth, a three-dimensional geological model forthe deposit has been constructed to explore the shollow response of the REE mineralization in the deep part of the deposit. The results suggest that the strike-slip faults near the major deep faults, the alkaline intrusion and carbonatite complex with high REE concentration, the wall rock alteration of fenitization and carbonation, the calcite enriched in trace elements of Ba, Na and Sr, and the linear distributed low resistivity anomalies shown by the CSAMT survey could be the shallow indications for the REE mineralization in the deep part of the deposit. There is relatively good prospecting potential for the REE resource in the deep part of the deposit with depths vary from 500 m to 1000 m.
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Received: 08 March 2022
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