| 韩 珂.构造-蚀变岩相填图方法在南秦岭汉阴黄龙金矿中的应用[J].地质与勘探,2019,55(4):939-954 |
| 构造-蚀变岩相填图方法在南秦岭汉阴黄龙金矿中的应用 |
| Application of the structure-alteration lithofacies mapping method in ore prospecting: An example of the Huanglong gold deposit in Hanyin, South Qinling |
| 投稿时间：2018-06-22 修订日期：2019-04-26 |
| DOI：10.12134/j.dzykt.2019.04.005 |
| 中文关键词: 构造-蚀变岩相填图 黄龙金矿 脆-韧性剪切带 找矿预测 |
| 英文关键词: structure-alteration lithofacies mapping, Huanglong gold deposit, the brittle-ductile shear zone , ore prospecting and forecast |
| 基金项目:中国地质调查局项目“陕西石泉—旬阳金矿整装勘查区关键基础地质研究”（编号：12120114014201）和中央高校基本科研项目“矿田构造与找矿预测”（编号：310827153408）联合资助。 |
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| 中文摘要: |
| 随着新一轮全国危机矿山找矿工作的开展，低成本、高效率的就矿找矿理论和方法对于一些老矿区的深部和外围找矿尤为重要。矿区构造-蚀变岩相填图的范围就是矿区勘查范围，在填图过程中把控岩构造、控矿构造、矿化蚀变等信息作为填图重点，以矿区地质图为底图，把野外填图过程中收集到的有关控矿构造、矿化蚀变等信息分期次，分不同特征等标示在底图上，形成控岩控矿构造实际材料图，在实际材料图基础上，编制矿区构造-蚀变岩相图，从而寻找主要的控矿构造和与矿化密切相关的蚀变岩相带，并为下一步矿区外围和深部找矿、工程布置提供靶区依据。黄龙金矿区位于扬子板块北缘南秦岭构造带，矿区志留系梅子垭组地层经历了多期构造变形，并叠加有区域变质和热液变质作用。本研究采用构造-蚀变岩相填编图的方法，在矿区填编出了3条脆-韧性剪切带和黑云母变斑晶化、硅化等蚀变岩相带，并认为脆-韧性剪切带、黑云母变斑晶化带、硅化带及蚀变岩相叠加带等蚀变与金矿体存在密切关系，是矿区下一步外围及深部找矿的重点靶区。 |
| 英文摘要: |
| With the new round of prospecting for crisis mines in China, the ore-prospecting theories and methods with low cost and high efficiency are especially important for prospecting in the deep subsurface and periphery of some old mines. The structure-alteration lithofacies-mapping is one of approaches in this aspect. Its working range accords with the survey scope in the mine area, focusing on data of rock, ore-controlling structure and mineralization alteration. Based on the simplified geological map of the mine area, these data are plotted on the base map in periods and different features. Then a map of structure-altered rock facies is prepared to help search for primary ore-controlling structures and altered rock facies zones related with mineralization, providing a basis for ore-search at depth and periphery and work plan in the mine area. This method has been applied to the Huanglonggold deposit in the South Qinling, the northern margin of Yangtze plate, where the Silurian Meiziya formation has experienced multi-stage tectonic deformation and is superimposed with regional metamorphism and hydrothermal metamorphism. As a result, three brittle-ductile shear zones and altered rock zones such as biotitization and silicificationetc were indentified in the deposit area, which are closely related to the existence old ore bodies, and should be primary targets for next step of exploration in this area. |
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