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2022 Vol. 49, No. 6
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LAI Yang, GONG Daxing, QIN Jianhua, TIAN Enyuan, HUI Bo, XU Lu, GAO Zedong. 2022. Sedimentary rare earth in the eastern Yunnan and western Guizhou: A new genetic type and potential of development and utilization[J]. Geology in China, 49(6): 1823-1833. doi: 10.12029/gc20220609
Citation: LAI Yang, GONG Daxing, QIN Jianhua, TIAN Enyuan, HUI Bo, XU Lu, GAO Zedong. 2022. Sedimentary rare earth in the eastern Yunnan and western Guizhou: A new genetic type and potential of development and utilization[J]. Geology in China, 49(6): 1823-1833. doi: 10.12029/gc20220609
shu

Sedimentary rare earth in the eastern Yunnan and western Guizhou: A new genetic type and potential of development and utilization

  • 1.

    Institute of Multipurpose Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Chengdu 610041, Sichuan, China

  • 2.

    Technology Innovation Center of Rare Earth Resources Development and Utilization, China Geological Survey, Chengdu 610041, Sichuan, China

  • 3.

    Mineral Processing Plant of Jinchuan Group Co., Ltd., Jinchang 737100, Gansu, China

    • Fund Project: Supported by the project of China Geological Survey "Comprehensive Geological Survey of Rare Earth Resource Bases in the Adjacent Areas of Yunnan and Guizhou" (No.DD20211236)
More Information
  • Author Bio: LAI Yang, male, born in 1987, master, engineer, engaged in mineralogy, regional geological and mineral survey and research; E-mail: 772459504@qq.com
  • Corresponding author: GONG Daxing, male, born in 1986, Ph.D., senior engineer, engaged in sedimentology, regional geology and mineral resources survey and research work; E-mail: 113652192@qq.com 
Received Date:  18 October 2020
Revised Date:  14 March 2021
Publish Date:  25 December 2022
    Abstract

  • This paper is the result of mineral exploration engineering.

    Objective

    Rare earth is not only important natural non-renewable resources, but also a key strategic resource. Based on the field geological survey and indoor comprehensive study of sedimentary rare earth resources in the eastern Yunnan and western Guizhou area, this paper reveals the advantages and development and utilization potential of the rare earth resources, which not only enriches the industrial types of the global rare earth resources, but also supports the national strategic reserve of key rare earth resources.

     Methods

    Based on the research on the characteristics of ore-bearing strata, typical ore characteristics, the partition characteristics of rare earth elements and the potential of rare earth resources, this paper discusses the genetic types of the rare earth resources, the occurrence state of rare earth elements and the potential of development and utilization.

     Results

    The ore-bearing stratum is identified as Xuanwei Formation of Upper Permian (P3x); the lithology of rare-earth rich ore is gray- white aluminite claystone and silty claystone; the origin of rare earth ore belongs to sedimentary type; in Weining County Heishitou—Mazha—Zhejue area, the thickness of ore body varies from 2m to 18m, the ore body extension is relatively continuous, the content of rare earth oxide (TREO) is up to 1.6%, the weighted average grade of ore body block (TREO) is 0.18% to 0.46%, and the inferred resource is over 300, 000 tons; the proportion of "Critical rare earth elements (CREE)" in the rare earth resources is up to 22.6% (∑CREO), which is higher than most of the rare earth deposits under development and utilization at domestic and overseas. In addition, the new selective leaching technology is used in the dressing and metallurgy test, and the results indicate that the recovery of rare earth can reach more than 90%. This new type of rare earth mine is expected to realize large-scale industrial utilization.

     Conclusions

    The sedimentary rare earth resource has the advantages of large ore thickness, high ore grade, large resource potential, low mining cost, high proportion of critical rare earth elements (CREO) in ore, and good development and utilization prospect.
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