地学前缘 ›› 2023, Vol. 30 ›› Issue (5): 205-215.DOI: 10.13745/j.esf.sf.2023.5.19

• 伟晶岩含矿性识别标志 • 上一篇    下一篇

新疆镜儿泉伟晶岩型锂矿岩矿光谱特征分析

王珊珊2,3,4,5(), 周可法1,5,*(), 白泳2,3,4,5, 鲁雪晨2,3,4, 蒋果2,3,4,5   

  1. 1.中国科学院 空间应用工程与技术中心, 北京 100094
    2.中国科学院 新疆生态与地理研究所 荒漠与绿洲生态国家重点实验室/干旱区生态安全与可持续发展重点实验室, 新疆 乌鲁木齐 830011
    3.中国科学院 新疆矿产资源研究中心, 新疆 乌鲁木齐 830011
    4.中国科学院 新疆生态与地理研究所 新疆矿产资源与数字地质重点实验室, 新疆 乌鲁木齐 830011
    5.中国科学院大学, 北京 100076
  • 收稿日期:2022-12-10 修回日期:2022-12-31 出版日期:2023-09-25 发布日期:2023-10-20
  • 通讯作者: 周可法
  • 作者简介:王珊珊(1982—),女,博士,副研究员,主要从事遥感信息提取和遥感地质方向的研究工作。E-mail: wangshanshan@ms.xjb.ac.cn
  • 基金资助:
    中国科学院重点领域部署项目(ZDRW-ZS-2020-4-2);中国科学院“西部青年学者”项目(2021-XBQNXZ-011);新疆维吾尔自治区自然科学基金杰出青年资助项目(2022D01E095);国家科学技术部第三次新疆综合科学考察项目(2022xjkk1306-2)

Spectral reflectance study of the Jing’erquan pegmatite lithium deposit, Xinjiang

WANG Shanshan2,3,4,5(), ZHOU Kefa1,5,*(), BAI Yong2,3,4,5, LU Xuechen2,3,4, JIANG Guo2,3,4,5   

  1. 1. Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, Beijing 100094, China
    2. State Key Laboratory of Desert and Oasis Ecology/Key Laboratory of Ecological Safety and Sustainable Development in Arid Lands, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, ürümqi 830011, China
    3. Xinjiang Research Centre for Mineral Resources, Chinese Academy of Sciences, ürümqi 830011, China
    4. Xinjiang Key Laboratory of Mineral Resources and Digital Geology, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, ürümqi 830011, China
    5. University of Chinese Academy of Sciences, Beijing 100076, China
  • Received:2022-12-10 Revised:2022-12-31 Online:2023-09-25 Published:2023-10-20
  • Contact: ZHOU Kefa

摘要:

伟晶岩型锂矿分布广且资源量大,是我国当前主要工业应用类型。新疆镜儿泉锂矿是东天山造山带最大的伟晶岩矿床,具有巨大的稀有金属找矿潜力。本文以镜儿泉锂矿为例,利用便携式地物光谱仪采集光谱反射率数据,对典型岩石及矿物样品进行波谱测试与分析,揭示花岗岩、含矿伟晶岩、不含矿伟晶岩、锂辉石和锂云母等岩石矿物的光谱特征,分析典型手标本及其镜下显微特征,并对国内典型矿床岩矿光谱开展对比分析研究。结果表明:1 913 nm波谱可以作为含矿伟晶岩、不含矿伟晶岩、花岗岩和白云母、锂云母和锂辉石光谱特征的区分特征关键波段,是含矿和不含矿的一个光谱指示波段。通过对比分析新疆阿尔金地区、西昆仑大红柳滩地区和四川甲基卡地区的伟晶岩型锂矿光谱特征,其光谱特征大致相同,吸收位置有1~4 nm的差异。本研究为今后开展伟晶岩型锂矿的遥感调查评价奠定了理论基础。

关键词: 伟晶岩型锂矿, 光谱分析, 光谱吸收参数, 锂辉石, 镜儿泉锂矿

Abstract:

The widely distributed pegmatite lithium deposits are the main source of lithium for industrial applications in China. The Jing’erquan lithium deposit, Xinjiang, is the largest pegmatite lithium deposit in the eastern Tianshan orogenic belt of Central Asia with great rare-metal resource potential. In this study, spectral reflectance extending from 400 to 2500 nm are obtained for rock and mineral specimens from the Jing’erquan lithium deposit, using ASD portable field spectrometer. The spectral reflectance characteristics of granite, mineral-bearing pegmatites, simple pegmatites, muscovite, spodumene, lematolite, etc., are analyzed. The study show that the 1913 nm spectral band can be used as a key band to identify lithium-bearing pegmatites. Based on the spectral characteristics of rocks and minerals, lithium deposits are compared between Jing’erquan, eastern Tianshan, and western Altun and Dahongliutan, western Kunlun, Xinjiang, and Jiajika, Sichuan, which show that the characteristic absorption wavelengths for lithium-bearing pegmatites in the four deposits differ by 1-4 nm. This study provides a theoretical basis for remote sensing mapping and geological prospecting of pegmatite lithium deposits in general.

Key words: pegmatite lithium deposits, spectral analysis, spectral absorption parameters, spodumene, Jing’erquan lithium deposit

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