| 李建旭.智利铁氧化物-铜-金矿床区域定位
构造-矿田构造类型与特征[J].地质与勘探,2011,47(2):323-332 |
| 智利铁氧化物-铜-金矿床区域定位
构造-矿田构造类型与特征 |
| Types and Characteristics of Regional Tectonics and Ore-fieldStructures of Iron Oxide-Copper-Gold Deposits in Chile |
| 投稿时间：2010-11-18 修订日期：2011-01-06 |
| DOI： |
| 中文关键词: 智利 IOCG 矿田构造 勘查标志 |
| 英文关键词: Chile, iron oxide-Cu-Au deposits, structure of ore field, prospecting indicators |
| 基金项目:]“十一五冶国家科技支撑计划项目:《危机矿山接替资源勘查技术与示范研究》东川-易门铜矿山深部及外围勘查技术及示范
研究课题(2006BAB01B09)、财政部海外风险勘探基金项目和北京勘技中心联合资助。 |
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| 中文摘要: |
| [摘要]智利铁氧化物铜金矿床形成于安第斯型活动大陆边缘中生代岩浆弧及弧后盆地,区域构
造特征主要为岩浆侵入构造岩相带和阿塔卡玛断裂系统(AFZ),岩浆侵入构造及岩相分带控制矿田形
成,AFZ 断裂系统控制了矿化带和大型矿体产出。矿田构造主要有五种类型:火山构造;岩浆侵入构造+
复式背斜;NS 向平行韧性断裂带+岩浆侵入构造;走滑断裂弯曲节点由于转换扩张机制形成封闭的弧环
形构造和热液角砾岩筒型。岩浆、断裂系统与成矿作用有密切的关系,关键因素是深成中酸性岩浆活
动。通过研究提出了选区及勘查构造标志并认为矿田内构造蚀变岩相填图是一种有效的工作方法。 |
| 英文摘要: |
| Abstract:Iron oxide-copper-gold deposits in Chile were formed in the Mesozoic magmatic arc and back-arc basins on the Andes-type active conti鄄
nental margin. Regional tectonics are mainly characterized by magmatic intrusive faces and the Atacama fault system (AFZ). Magmatic intrusive struc鄄
tures and litho faces zonation control the formation of ore fields and the AFZ fault system controls the occurrences of mineralized zones and large-scale ore
bodies. Structures of ore fields include five types: volcanic structure, magmatic intrusive structure + anticlinorium, NS trending parallel ductile fault zones
+ magmatic intrusive structures, closed arc annular structures and hydrothermal breccia-pipe structures formed by transition and expansion of bending
nodes of strike-slip faults. Magmatic systems and fault systems are closely related to mineralization, and plutonic intermediate-acid magmatic intrusive ac鄄
tivities may be the key factor. Through studies, we suggested structural indicators for target selection and exploration and thought that the structure-altered
faces mapping in ore field is one of the effective working methods. |
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