滇西那俄铍矿床,伟晶岩型铍矿床,花岗伟晶岩,绿柱石,云母,钾长石,石榴子石,稀有金属矿床 ," /> 滇西那俄铍矿床,伟晶岩型铍矿床,花岗伟晶岩,绿柱石,云母,钾长石,石榴子石,稀有金属矿床 ,"/> Na’e beryllium deposit in western Yunnan Province,pegmatitic beryllium deposit,granite pegmatite,beryl,mica,K-feldspar,garnet,rare metal deposit ,"/> <p class="MsoNormal"> 滇西那俄花岗伟晶岩型铍矿床矿石矿物的元素组成特征及其成矿意义

吉林大学学报(地球科学版) ›› 2024, Vol. 54 ›› Issue (2): 479-497.doi: 10.13278/j.cnki.jjuese.20230126

• 地质与资源 • 上一篇    下一篇

滇西那俄花岗伟晶岩型铍矿床矿石矿物的元素组成特征及其成矿意义

明添学1,2,3，唐忠1,2,4，李蓉1,2,3，何小虎2,5，田素梅1，殷伟1，覃勇凯6，包丛法7，李良5，杨斯琦8，张子军6   

  1. 1.云南省地质调查院（云南省地质科学研究院），昆明650051

    2.自然资源部三江成矿作用及资源勘查利用重点实验室，昆明650051

    3.云南省三江成矿作用及资源勘查利用重点实验室，昆明650051

    4.昆明理工大学国土资源工程学院，昆明650093

    5.云南大学地球科学学院，昆明650500

    6.云南省核工业二○九地质大队，昆明650032

    7.云南省国土资源规划设计研究院，昆明650216

    8.昆明理工大学材料科学与工程学院，昆明650093

     

  • 出版日期:2024-03-26 发布日期:2024-04-09
  • 基金资助:

    中国地质调查局项目（DD20221695，DD20190379）；云南省地质勘查基金项目（D202101，D202305，Y202305）


Elemental Composition and Metallogenic Significance of  Ore Minerals in  Na’e Granite-Pegmatite Type Beryllium Deposit in Western Yunnan Province

Ming Tianxue1,2,3,Tang Zhong1,2,4, Li Rong1,2,3, He Xiaohu2,5,Tian Sumei1, Yin Wei1,Qin Yongkai6,Bao Congfa7, Li Liang5,Yang Siqi8，Zhang Zijun6

#br#   

  1. 1. Institute of Yunnan Geology Survey （Institute of Yunnan Geological Sciences）,Kunming 650051,China

    2. Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization,Ministry of Natural and Resources,

    Kunming 650051,China

    3. Yunnan Key Laboratory of Sanjiang Metallogeny and Resources Exploration and Utilization,Kunming 650051,China

    4. Faculty of Land Resource Engineering，Kunming University of Science and Technology，Kunming 650093, China

    5. College of Earth Science,Yunnan University,Kunming 650500,China

    6. Team 209 of Yunnan Nuclear Industry,Kunming 650032,China

    7. Yunnan Planning and Design Institute for Mineral and Land Resources, Kunming 650216, China

    8. School of Materials Science and Engineering，Kunming University of Science and Technology，Kunming 650093, China

     

  • Online:2024-03-26 Published:2024-04-09
  • Supported by:
    Supported by the Project of China Geological Survey (DD20221695,DD20190379) and the Foundation of Geological Exploration in Yunnan Province (D202101,D202305, Y202305)

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摘要：

滇西那俄铍矿床是近年评价的小型稀有金属矿床，矿体主要为石榴子石钠长石化花岗伟晶岩脉，赋存于二长花岗岩中。矿体长100~1 150 m，厚度0.43~3.70 m，w(BeO)为0.007%~1.790%，w(Ta2O5)为0.003 2%~0.053 3%，w(Rb2O)为0.041%~0.317%。有用组分以铍矿为主，共伴生钽、铷矿；少数矿石以钽矿为主，共伴生铍、铷矿。矿石矿物以绿柱石、铌钽铁矿、白云母、钾长石为主，区内最明显的找矿标志是含绿柱石伟晶岩，其次是含石榴子石钠长石化伟晶岩。电子探针分析显示：绿柱石属于无碱绿柱石-低碱绿柱石，分子式为Be2.8928~2.9481Al1.9766~2.0225Si6O18；云母中w(Li2O)为0.500 1%~2.427 9%，w(Rb2O)为0.730 3%~2.304 2%，属白云母—多硅白云母—富锂多硅白云母；钾长石中含有较高的w(Rb2O)，为0.486 1%~1.033 4%，分子式为K0.8932~0.9713 \[Al1.0013~1.0151 Si2.9809~2.9990O8\]；石榴子石能谱谱系以发育Mn、Fe双峰为特征，以锰铝榴石(Spe)和铁铝榴石(Alm)为主，锰铝榴石体积分数达67.02%~69.07%，属岩浆成因锰铝榴石。本区Be元素主要赋存于绿柱石中，Rb元素赋存于钾长石和白云母中，Li元素赋存于白云母—多硅白云母—富锂多硅白云母中。白云母和绿柱石成分显示那俄地区花岗质岩浆初始Li并不富集，在伟晶岩演化晚期岩浆中高度富集F-Li流体活动是该地区稀有金属异常富集的重要因素。

关键词: 滇西那俄铍矿床')">

滇西那俄铍矿床, 伟晶岩型铍矿床, 花岗伟晶岩, 绿柱石, 云母, 钾长石, 石榴子石, 稀有金属矿床

Abstract:

Na’e small pegmatitic beryllium deposit has recently been proved in the western Yunnan Province. The ore bodies are found in garnet and albitite granite pegmatite dikes within monzonitic granite. These ore bodies range from 100-1 150 m in length, 0.43-3.70 m in thickness ,and contain BeO, Ta2O5, Rb2O in concentrations of 0.007%-1.790%, 0.003 2%-0.053 3% and 0.041%-0.317%, respectively. The mainly major useful element in the ore is beryllium, associated with tantalum and rubidium. Some few ore mainly contains tantalum, and associated with beryllium and rubidium. The ore minerals include beryl, niobium tantalite, muscovite and K-feldspar. The beryl-bearing pegmatite is a siginificant prospecting indicator in the area, followed by garnet bearing albionite pegmatite. EPMA results show that beryl falls into the alkali-free beryl to low alkali beryl. The molecular formula for beryl is Be2.8928-2.9481Al1.9766-2.0225Si6O18. Muscovite contains w(Li2O) 0.500 1%-2.427 9% and w(Rb2O) 0.730 3%-2.304 2%, belonging to muscovite-polysilica muscovite-Li-rich muscovite. K-feldspar has a high w(Rb2O) content of 0.486 1%-1.033 4%, with a molecular formula of K0.8932-0.9713 \[Al1.0013-1.0151 Si2.9809-2.9990O8\]. Energy spectrum of garnet is characterized by the development of Mn and Fe bipeaks, mainly spessartine (Spe) and almandine (Alm), with spessartine accounting for 67.02%-69.07%, indicating a magmatic origin of spessartine. Beryllium is mainly occurred in beryl, rubidium in K-feldspar and muscovite, and lithium in muscovite-polysilica muscovite-Li-rich muscovite. The composition of muscovite and berylite shows that lithium was not initially enriched in granitic magmas in the Na’e  area, but the late pegmatite evolution involving highly enriched F-Li fluid activity in magmas played an important factor in the abnormal enrichment of rare metals in this area.

Key words: Na’e beryllium deposit in western Yunnan Province')">

Na’e beryllium deposit in western Yunnan Province, pegmatitic beryllium deposit, granite pegmatite, beryl, mica, K-feldspar, garnet, rare metal deposit

中图分类号: 

  • P597
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