| 汪昌亮.印度尼西亚某金矿矿床地质特征及找矿远景探讨[J].地质与勘探,2015,51(6):1201-1208 |
| 印度尼西亚某金矿矿床地质特征及找矿远景探讨 |
| Geological characteristics of a gold deposit in Indonesia and its ore-search prospects |
| 投稿时间：2015-08-04 修订日期：2015-10-09 |
| DOI： |
| 中文关键词: 金矿 矿床类型 矿体三维建模 断裂带 |
| 英文关键词: gold deposit, deposit type, ore body 3-D modeling, fault belt |
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| 摘要点击次数: 1947 |
| 全文下载次数: 936 |
| 中文摘要: |
| 印度尼西亚北苏拉维西省西南某金矿大地构造上处于欧亚板块、大洋洲板块和太平洋板块的交会部位，属西太平洋火山-岛弧的一部份，其主构造呈北东-南西向展布，并伴有北西-南东向次级断裂构造，在这些构造交汇部位常分布有多个大型金矿床。2008年-2010年，相关方面对该金矿实施了系统的地质勘查工作，本文基于勘查获得的地质资料，对该矿的矿区地质、构造特征、矿体几何形态、矿石结构构造、矿物组成和蚀变等作了系统的研究，认为含金矿体主要发育于遭受断裂活动的灰岩和安山岩的接触界面中，断层下盘灰岩中发育不规则的溶洞充填型矿体，由于渗透性差，断层上盘安山岩中矿化不发育。硅化角砾岩是矿区及周围找矿的重要标志。矿区内已探明矿体两端延伸方向及其深部是下一步找矿的主要方向。 |
| 英文摘要: |
| A gold deposit of Sulawesi Islands, Indonesia is situated in the conjunction of the Euro-Asia, Australasia and Pacific plates, and considered as part of West Pacific volcanic-island belt. Its structure is dominated by NE-SW direction, with NW-SE trending secondary faults. Many large-scale gold deposits are often distributed in the conjunctions of these faults. A detailed survey was conducted in this deposit during 2008 to 2010. Based on geological data from this survey, this work made a systematic study on the geology of the mine, structural features, geometry of ore bodies, ore structure, ore composition, and alteration. The results suggest that the gold-bearing ore bodies developed primarily in the contact of limestone and andesite that suffer faulting. The irregular ore bodies of karst-cave filling type occur in the limestone in the footwalls of faults. While due to poor permeability, little mineralization took place in the andesite in the hanging walls of faults. The strong silicified fault breccia is an important indicator for ore-search in the mine and surroundings. Extensions of both ends of the proven ore body and deep subsurface of the mine should be the targets for further exploration in the future. |
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