| 南秦岭汉阴北部金矿田控矿要素研究及找矿方向建议 |
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| 引用本文： | 高雅宁,杨兴科,杨龙伟,韩珂.南秦岭汉阴北部金矿田控矿要素研究及找矿方向建议[J].地质力学学报,2016,22(2):245-255. |
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| 作者姓名： | 高雅宁 杨兴科 杨龙伟 韩珂 |
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| 作者单位： | 长安大学地球科学与资源学院, 西安 710054;长安大学地球科学与资源学院, 西安 710054;长安大学西部矿产资源与地质工程教育部重点实验室, 西安 710054;长安大学地球科学与资源学院, 西安 710054;长安大学地球科学与资源学院, 西安 710054 |
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| 基金项目： | 中国地质调查局地质调查项目"陕西石泉—旬阳金矿整装勘查区关键基础地质研究"（12120114014201）; 陕西省自然科学基金项目（2016JM4001） |
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| 摘 要： | 选取南秦岭汉阴北部金矿田内黄龙、长沟和金斗坡典型矿区为研究区,通过野外大比例尺构造-岩相填图、剖面实测、综合编图等工作,结合前人研究成果,查明了金矿田的控矿要素,并指出了有利的找矿勘探方向。综合研究表明,汉阴北部金矿田的矿化严格受控于志留系梅子垭组的不同岩性段;脆-韧性剪切带控制了矿床的空间分布,次级断层控制矿体产出的具体部位;S_2面理对金矿化有显著的制约作用;促使石榴子石和黑云母变斑晶发育的热变质作用能够引起原始岩层中金元素发生活化,且热变质作用的晚期为退变质期,退变质期的适宜温度有利于金元素富集成矿。矿田内的金矿勘探应重点选在脆-韧性剪切带内,尤其针对不同岩性的接触面、次级断层面附近、石榴子石与黑云母变斑晶密集发育区周缘等区域,矿体追索方向应依照S_2面理的空间优势展布方向。
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| 关 键 词： | 南秦岭 金矿田 S2 面理 控矿要素 找矿方向 |
| 收稿时间： | 2015/10/12 0:00:00 |
STUDY ON ORE-CONTROLLING FACTORS AND MINE EXPLORATION PROPOSAL OF THE GOLD ORE FIELD IN NORTH HANYIN, SOUTH QINLING |
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| GAO Ya-ning,YANG Xing-ke,YANG Long-wei and HAN Ke.STUDY ON ORE-CONTROLLING FACTORS AND MINE EXPLORATION PROPOSAL OF THE GOLD ORE FIELD IN NORTH HANYIN, SOUTH QINLING[J].Journal of Geomechanics,2016,22(2):245-255. |
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| Authors: | GAO Ya-ning YANG Xing-ke YANG Long-wei and HAN Ke |
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| Institution: | School of Earth Science and Resources, Chang''an University, Xi''an 710054, China;School of Earth Science and Resources, Chang''an University, Xi''an 710054, China;Key Laboratory of Western Mineral Resource and Geological Engineering Ministry of Education, Xi''an 710054, China;School of Earth Science and Resources, Chang''an University, Xi''an 710054, China;School of Earth Science and Resources, Chang''an University, Xi''an 710054, China |
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| Abstract: | Taking Huanglong, Changgou and Jindoupo gold ore areas located in Northern Hanyin ore field, Southern Qinling as the typical study area, through the large-scale tectonic lithofacies mapping, measuring geologic section and complex map compilation, the ore-controlling factors of this ore-field has eventually been acquired which would provide the directions of gold exploration based on previous research results. Comprehensive analysis shows that gold mineralization of this field is bound up with Silurian Meiziya Group stratum, and the brittle-plastic shear zone restricts the spatial distribution of gold deposits, and the locations of the ore bodies are decided by the secondary faults. S2 structural foliation obviously controls the gold mineralization, and the thermometamorphism which develops biotite and garnet porphyroblasts can cause the gold element to reactivate. And in the late stage it is the retrograde metamorphism period during which the temperature is very available for the form of gold deposits. Therefore the gold exploration in this area should be focus on the brittle-plastic shear zones in the future, especially the positions of those connection of different rock layer, the region near the secondary faults, and the scopes where biotite and garnet porphyroblasts massively appear. Meanwhile the direction of gold seeking should follow the main spatial distribution direction of S2 foliation. |
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| Keywords: | South Qinling the gold ore field S2 structural foliation the ore-controlling factors gold exploring direction |
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