| 周祖虎,曹卫刚,戴玉皇,杨啓俊,侯林洋,祁连素.黔西南莲花山背斜北东段萤石矿带控矿因素与找矿方向[J].贵州地质,2024,(3):270-277 |
| 黔西南莲花山背斜北东段萤石矿带控矿因素与找矿方向 |
| Ore-controlling Factors and Prospecting Direction of Fluorite Belt in Northeastern Lianhuashan Anticline，Southwestern Guizhou |
| 投稿时间：2024-01-11 |
| DOI： |
| 中文关键词: 萤石矿 控矿因素 找矿方向 莲花山背斜 黔西南 |
| 英文关键词:Fluorite deposits Ore-controlling factors Prospecting direction Lianhuashan anticline Southwestern Guizhou |
| 基金项目:2022年度贵州省新一轮找矿突破战略行动项目(贵州省普安县莲花山地区萤石矿调查评价)(黔自然资函〔2022〕623号) |
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| 中文摘要: |
| 黔西南莲花山背斜北东段萤石矿呈陡倾脉状、囊状产于北东向构造带中，属于有利构造、气液隐爆角砾岩体与有利岩性共同控制陡倾角矿体的浅成低温热液型矿床。地质填图、地球物理资料成果显示，北东向莲花山背斜及其配套的落水洞断裂、次级张性断裂共同构成了该区成矿热液通道和容矿空间。其中，北东向落水洞断裂为一级导矿构造，北东向张性构造(断层、节理、裂隙)既为二级导矿构造、又为容矿构造。深部含矿热液沿不同级别导矿断裂上涌至有利构造容矿空间，热液在构造转换过程中减压扩容环境发生隐爆，致密围岩破碎形成的角砾具有更大表面积的水-岩反应，致使的矿化作用更加充分，被上覆龙潭组泥质岩类屏蔽，成矿流体萃取灰岩中的钙质，在构造破碎带中充填交代成矿。背斜构造中的张性正断裂及其派生张性构造组合以及气液隐爆角砾岩体，是将来萤石矿勘查的主攻目标。深入研究成矿作用过程中多种控矿因素耦合关系，有利于拓展深部萤石矿产找矿勘探。 |
| 英文摘要: |
| The fluorite deposits in the north-eastern Lianhuashan anticline of southwest Guizhou are presented as vein-shaped and sac-shaped in the NE-trending structures，which belong to the epithermal deposit with steep dip controlled by favorable structures，gas-liquid cryptoexplosion breccia bodies and lithologiesThe results of geological mapping and geophysical data show that the NE-trending Lianhuashan anticline and the related Luoshuidong fault and secondary extensional faults are the mineralizing hydrothermal channels and ore-bearing space in this areaAmong them，the NE-trending Luoshuidong fault is the first-order ore-conducting structure，and the NE-trending extensional structures (fault，joint and fracture) are both the second-order ore-conducting structure and ore-bearing structureThe deep ore-bearing hydrothermal fluids upflowed to the favorable structural ore-bearing space along different orders of ore-conducting faults，then the breccia formed by the cracking of the dense wall rock had a larger surface area of water-rock reaction，resulting in more full mineralizationSubsequently，the ore-bearing hydrothermal fluids were shielded by the overlying fine clastic rocks of Longtan Formation，and the metasomatic mineralization happened in these structural fractures when the ore-forming fluids extracted calcium from limestoneThe normal faults，these derived extensional structures and gas-liquid cryptoexplosion breccia bodies in the anticline are the main objects of fluorite ore exploration in the futureIn-depth study of the coupling relationship of multiple ore-controlling factors in the mineralization is conducive to expand the exploration of deep fluorite resources |
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