【引用本文】 聂潇, 王宗起, 陈雷, 等. 蚀变粗面岩中再平衡结构黑云母的电子探针分析[J]. 岩矿测试, 2019, 38(5): 566-575. doi: 10.15898/j.cnki.11-2131/td.201807100081
NIE Xiao , WANG Zong-Qi , CHEN Lei , et al. Electron Microprobe Analysis of Biotite with Reequilibration Texture in Altered Trachyte[J]. Rock and Mineral Analysis, 2019, 38(5): 566-575. doi: 10.15898/j.cnki.11-2131/td.201807100081

蚀变粗面岩中再平衡结构黑云母的电子探针分析

1. 中国地质科学院矿产资源研究所, 自然资源部成矿作用与资源评价重点实验室, 北京 100037;

2. 山西地矿海外工程建设有限公司, 山西 太原 030002

收稿日期: 2018-07-10  修回日期: 2019-03-05 

基金项目: 国家自然科学基金面上项目(41872092);中国地质调查局地质调查项目“境外大型矿产资源基地及资源潜力评价”(DD20190437)、“矿产资源国情调查数据集成与动态更新”(DD20190613)

作者简介: 聂潇,博士后,矿物学、岩石学、矿床学专业。E-mail:niexiao369@qq.com。。

Electron Microprobe Analysis of Biotite with Reequilibration Texture in Altered Trachyte

1. Key Laboratory of Metallogeny and Mineral Assessment, Ministry of Natural Resources;Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing 100037, China;

2. Shanxi Dikuang Overseas Engineering Construction Co. LTD, Taiyuan 030002, China

Received Date: 2018-07-10
Revised Date: 2019-03-05

摘要:黑云母的化学成分中蕴含着重要的成因信息,对具有交代结构的黑云母进行微区成分分析,能够精细反映交代蚀变过程中元素迁移情况,为解决矿床形成机制方面的科学问题提供矿物学证据。本文以北大巴山平利地区蚀变粗面岩中具有再平衡结构的黑云母斑晶为研究对象,进行电子探针面扫描和剖面成分分析。结果表明,斑晶内部为岩浆成因黑云母,边缘为"扩散-反应"过程所致的再平衡成因黑云母。斑晶边缘与内部相比,TiO2含量由平均5.78%降至2.22%,表明在交代蚀变过程中黑云母中Ti等高场强元素被淋滤出进入流体;而CaO含量由平均0.06%升至0.14%,F含量由平均0.60%升至0.80%,指示蚀变流体内富含Ca、F等组分。本研究揭示了粗面岩中铌矿床的形成与热液作用关系密切,成矿流体中Ca、F等组分在铌元素的迁移及富集过程中具有重要作用。

关键词: 黑云母, 电子探针, 再平衡结构, 铌矿床, 粗面岩

Electron Microprobe Analysis of Biotite with Reequilibration Texture in Altered Trachyte

KEY WORDS: biotite, electron microprobe analysis, reequilibration textures, Nb deposit, trachyte

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蚀变粗面岩中再平衡结构黑云母的电子探针分析

聂潇, 王宗起, 陈雷, 陈浦浦, 王刚