| ZHU Li,YANG Yong-qiong,GU Han-nian,WEN Han-jie,DU Sheng-jiang,LUO Chong-guang.Mineralogical Characteristics of Two Clay-type Lithium Resources in Yuxi, China, and Nevada, the United States of America[J].Rock and Mineral Analysis,2021,(4):532-541 |
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| Mineralogical Characteristics of Two Clay-type Lithium Resources in Yuxi, China, and Nevada, the United States of America |
| Received:August 13, 2020 Revised:December 15, 2020 |
| DOI：10.15898/j.cnki.11-2131/td.202008130112 |
| Key words: clay-type lithium resource mineralogical characteristics X-ray fluorescence spectrometry inductively coupled plasma-mass spectrometry X-ray powder diffraction |
| Author Name | Affiliation | E-mail | | ZHU Li | College of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China | | | YANG Yong-qiong | College of Geography and Environmental Science, Guizhou Normal University, Guiyang 550025, China | yyongqiong@163.com | | GU Han-nian | Key Laboratory of High-temperature and High-pressure Study of the Earth's Interior, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China | guhannian@vip.gyig.ac.cn | | WEN Han-jie | State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China
College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China | | | DU Sheng-jiang | State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang 330013, China | | | LUO Chong-guang | State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081, China | |
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| Abstract: |
BACKGROUND: Sufficient mineralogical research on clay-type lithium resources is an important prerequisite for lithium extraction and leaching. Numerous clay-type lithium resources have been discovered in both Yuxi City of Yunnan Province in China and the state of Nevada in the USA; however, existing research on their mineralogical characteristics is relatively insufficient.
OBJECTIVES: To explore the main chemical composition, phase composition, microscopic morphology, Li occurrence and other characteristics of clay-type lithium resource samples from Yuxi and Nevada and to provide theoretical support for the extraction and leaching of clay-type lithium resources in these two areas.
METHODS: X-ray fluorescence spectroscopy, inductively coupled plasma emission spectroscopy, inductively coupled plasma mass spectrometry, powder crystal X-ray diffraction analysis, and scanning electron microscopy were used to analyze the mineral and chemical differences in the clay-type lithium resources between the two samples (YM-1 and YM-2) collected from Yuxi City, Yunnan Province, and the two samples (Ame-1 and Ame-2) from Nevada, USA.
RESULTS: The lithium contents of YM-1 and YM-2 and Ame-1 and Ame-2 were higher than 1000μg/g, which exhibited a certain development and utilization value. However, the clay-type lithium resource samples from the two investigated regions showed large differences in chemical composition, mineral composition, microscopic morphology, and lithium occurrences. (1) YM-1 and YM-2 had similar SiO2 and Al2O3 content, with the total amount of silicon and aluminum oxides exceeding 80%, whereas Ame-1 contained 60.39% SiO2 and Ame-2 comprised 42.30% CaO. (2) YM-1 and YM-2 were composed of kaolinite and montmorillonite, whereas Ame-1 and Ame-2 were composed of quartz, nontronite, stevensite, or calcite. (3) YM-1 and YM-2 were stacked in a layered structure with flat surfaces and had round edges and a relatively uniform size, whereas Ame-1 and Ame-2 were mainly represented by massive mineral aggregates of different sizes. (4) Montmorillonite in YM-1 and YM-2 served as the lithium source, whereas lithium in Ame-1 and Ame-2 originated from smectite minerals or illite.
CONCLUSIONS: This study elucidated the mineralogical characteristics of clay-type lithium resources in Yuxi (Yunnan, China) and Nevada (USA). It provides a scientific basis for future development and utilization of the clay-type lithium resources in these two regions. |
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