| 北大巴山平利—镇坪地区碱性火山作用及锌-萤石成矿作用研究 |
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| 引用本文：郭现轻,王宗起,闫臻.2017.北大巴山平利—镇坪地区碱性火山作用及锌-萤石成矿作用研究[J].地球学报,38(s1):21-24. |
| DOI：10.3975/cagsb.2017.s1.07 |
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| 基金项目:国家自然科学基金项目(编号: 41172178);中国地质科学院地质研究所基本科研业务费项目(编号: J1002); 中国地质调查局地质调查研究项目(编号: 1212011121091) |
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| 中文摘要:北大巴山南北两侧分别以城口—房县断裂和安康断裂为界, 是南秦岭构造带的重要组成部分。区内碱性火山作用十分发育, 除局部出露少量碳酸岩之外, 粗面岩、碱性玄武岩及相关火山碎屑岩岩石组合最为发育, 是铜、锌、萤石等矿床(点)的重要赋矿围岩。不同学者对这些碱性火山岩的演化过程、形成时代和形成构造环境仍存在争议, 已有研究缺乏对这些碱性火山岩空间分布变化对比综合研究, 严重影响了对区域演化的认识。同时其内赋存的锌-萤石矿床成矿时代及成矿物质来源缺乏研究, 制约了区域找矿突破。 |
| 中文关键词:碱性火山岩 OIB 大磨沟—闹阳坪 被动大陆边缘 北大巴山 |
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| Alkali Volcanism and Zinc-fluorite Mineralization of Pingli–Zhenping Area, North Daba Mountains |
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| Abstract:North Daba Mountains, which is an important part of the South Qinling belt, was confined by An’kang Fault in the north and Chengkou–Fangxian Fault in the south. Besides minor lamprophyre and carbonatite, alkali volcanic rocks, characterized by trachyte, alkali basalt and related volcanoclastic rocks, are widespread in North Daba Mountains. These alkali volcanic rocks are the main hosting rocks of copper, Zinc and Fluorite mineralization. Debates on the magmatic evolution, formation age and tectonic set-ting about the alkali volcanic rocks still exist due to lack of comparison and systematical research of dis-tribution of alkali volcanic rocks, which blocks the perspective of regional evolution. The lack of study on mineralization age and ore-forming material of zinc-fluorite deposit constrains the breakthrough of mineral deposit exploration. |
| keywords:alkali volcanic rocks OIB Damogou–Naoyangping passive continental margin north Daba Mountains |
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