中国稀土矿床的矿床类型、时空分布和找矿方向
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本文为科技基础资源调查专项课题(编号2022FY101703)、中国地质科学院矿产资源研究所基本科研业务费项目(编号KK2206)和中国地质调查局项目“矿产资源国情调查与潜力动态评价”项目(编号DD20230040)”联合资助的成果


The deposit types, spatial and temporal distribution and prospecting direction of rare earth deposits in China
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    摘要:

    我国稀土矿床类型划分为3类:硬岩型、风化壳离子吸附型和砂矿。我国稀土矿由13个成矿区带组成,成矿高峰期为中元古代和新生代,前者以白云鄂博矿床为代表,后者以冕宁- 德昌成矿带中稀土矿床和南方6省的风化壳离子吸附型稀土矿为代表。我国目前可利用的稀土矿床类型为碳酸岩- 碱性岩型和风化壳离子吸附型,前者是轻稀土的主要来源,后者是重稀土的主要来源。碳酸岩- 碱性岩型稀土矿的控制因素包括克拉通边缘裂谷构造背景或同碰撞- 后碰撞的张性构造背景、区域性深断裂和碳酸岩岩浆及期后热液演化,风化壳离子吸附型稀土矿的控制因素为成矿母岩高分异富稀土花岗岩和外源性因素(剥露- 剥蚀之间的准平衡、低洼的平缓坡度、在亚热带气候条件下足够的降水量和有利的地下水条件)。本文介绍了碳酸岩- 碱性岩型稀土矿和风化壳离子吸附型稀土矿的普适性成矿模型。已知矿床的深边部是碳酸岩- 碱性岩型轻稀土矿找矿勘查重点地段,但也不应该忽视兴蒙成矿带和波孜果儿- 依兰里克成矿带中硬岩型重稀土矿的寻找。在我国赣南、粤北和滇南地区是寻找风化壳离子吸附型重稀土矿的关键区域。

    Abstract:

    Rare earth element (REE) deposits in China can be categorized into the hard rock- type, ion adsorption- type, and placer REE deposits. The REE deposits in China are composed of 12 metallogenic zones, and the peak periods of mineralization are mesoproterozoic and Cenozoic. The former is represented by Bayan Obo ore deposit, while the latter is represented by the REE deposits of the Mianing- Dechang metallogenic zone and ion adsorption- type REE deposits in six provinces of southern China. The available rare earth deposits in China are carbonatite and alkaline rock- related and ion adsorption type REE deposits. The former is the source of LREE and the latter is the source of HREE. The controlling factors of carbonatite and alkaline rock- related REE deposits include rifts or collision- post- collision tectonic settings along craton margins, regional deep faults, and the magmas and post- magma hydrothermal evolution. The controlling factors of ion adsorption- type REE deposits include parent rocks, favorable exogenetic factors including quasi- equilibrium between denudation and exhumation at regional scales, local geomorphology dominated by low- lying gentle slopes, adequate rainfall, and favorable groundwater conditions. In this paper, the general metallogenic models of carbonatite and alkaline rock- type and ion adsorption- type REE deposits are recommended. The prospecting of carbonate rock and alkaline rock- type REE deposits is concentrated in the depth and edges of known deposits, but the search for hard rock- type heavy rare earth deposit in Xingmeng and Boziguer- Yilanlik metallogenic belts should not be ignored. Southern Jiangxi Province, northern Guangdong Province and southern Yunnan Province are the key areas to search for ion adsorption- type HREE deposits.

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引用本文

余金杰,陈绍聪,陈小丹.2025.中国稀土矿床的矿床类型、时空分布和找矿方向[J].地质学报,99(8):2493-2512.
YU Jinjie, CHEN Shaocong, CHEN Xiaodan.2025. The deposit types, spatial and temporal distribution and prospecting direction of rare earth deposits in China[J]. Acta Geologica Sinica,99(8):2493-2512.

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  • 收稿日期:2023-01-12
  • 最后修改日期:2023-03-05
  • 录用日期:2023-03-11
  • 在线发布日期: 2025-08-29
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