| 郭少丰.甘肃镜铁山矿床构造新认识[J].地质与勘探,2013,49(1):123-129 |
| 甘肃镜铁山矿床构造新认识 |
| New Understanding of Structures in the Jingtieshan Iron-Ore Deposit, Gansu Province |
| 投稿时间：2012-01-10 修订日期：2012-07-06 |
| DOI： |
| 中文关键词: 镜铁山 铁矿 向斜 断层控矿 新认识 |
| 英文关键词: Jingtieshan, iron-ore deposit, syncline structure, fault control on deposit, new understanding |
| 基金项目:本文为国土资源部公益性行业科研专项经费项目（编号200911007-16）资助成果 |
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| 中文摘要: |
| [摘 要]甘肃镜铁山铁矿是我国西北地区重要钢铁基地，目前保有铁矿石4亿吨，因同时具有中等规模铜矿床而倍受关注。原矿山勘探资料认为镜铁山矿床是向斜构造，铁矿体受向斜控制，下部已无矿，基于该认识，自上世纪90年代至今，除一些生产性勘探外，深部及外围找矿基本停滞，并有Ⅲ，Ⅳ矿体，Ⅵ，Ⅶ矿体先后闭坑。笔者最近在此工作期间，依据桦树沟矿区开采现状，黑沟矿区控矿特点以及节理与千枚理关系，推测镜铁山矿并不是向斜，以黑沟矿区为代表，可能主要为断层控矿，深部和外围找矿潜力巨大。 |
| 英文摘要: |
| Abstract: The Jingtieshan iron-ore mine in Gansu Province, which holds 400 million tons of iron ores at present, is an important iron and steel base in northwestern China. It also attracts much attention for its medium-sized copper deposit. Previous mining exploration considered that it was controlled by syncline structures, and there are no other iron-ore bodies at depth. Based on this view, the deep and peripheral prospecting almost stopped since the 1990s expect some limited productive exploration work, and the orebodies III, IV, VI and VII were closed successively. This study analyzes the ore-controlling features of the Heigou ore district and the relationship between joints and phyllitic cleavage. The results show that the Jingtieshan deposit is not a syncline structure. The ore bodies are controlled by faults as represented by the Heigou mining area. The deep and peripheral regions have a great prospecting potential in the Jingtieshan mining area. |
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