基韦诺半岛与滇黔地区玄武岩铜矿对比研究  

Comparison of the Basalt Copper Deposits in the Keweenaw Peninsula of Michigan(USA) and the Adjacent Area of Yunnan-Guizhou Provinces(China)

作　　者：陈大 

机构地区：[1]贵州省有色金属和核工业地质勘查局地质矿产勘查院,贵州贵阳550005

出　　处：《大地构造与成矿学》2015年第1期110-127,共18页Geotectonica et Metallogenia

基　　金：中国地质调查局项目"全国矿产资源潜力评价"(编号:(2007)038-01-23)资助

摘　　要：滇黔地区玄武岩铜矿有很长的找矿与开发历史,但矿床规模较小。有研究者认为其与美国基韦诺铜矿极具相似性,并认为加强区内地球化学边界及铜矿床研究,将对成矿理论发展及经济价值方面具有重要意义,此举引发了新一轮的研究与找矿热潮,但收效甚微。为探索滇黔地区找矿过程中所遇之困惑以及更进一步探明资源潜力,本文在详细了解基韦诺半岛铜矿特征基础上,展开了其与滇黔地区铜矿的相似性、差异性对比研究。认识到以往对基韦诺半岛铜矿特征描述存在偏差,基韦诺半岛铜矿与滇黔地区铜矿之间相似性与差异性共存,滇黔地区红层化作用不足可能影响了成矿规模,但可寻找地质环境有利矿种;提出玄武岩自然铜矿化可能潜力有限,三叠系砂岩型铜矿需要继续关注以及其他铜矿类型具有找矿价值较小或尚需研究的建议。After years of prospecting and mining of thebasaltic copper deposits in the border area of Yunnan-Guizhou provinces, many people think the potential of metallogenic prospect is dismay and the deposits are of small sized. However, some researchers proposed in 2002 that these deposits have characteristics similar to those of the Keweenaw copper deposits, and thus their significance is worthy of further consideration. To investigate the resource potential in the region, we carried out a comparative study of the deposits in the two regions. The results show that the existence of redbed may be an important facor controlling the potential of copper mineralization. Therefore, we suggest that the native copper mineralization in the mid-low Triassic sandrocks demands further investigation and it is promising for metallogenic prospecting.

关 键 词：红层 自然铜型 玄武岩铜矿 滇黔地区 基韦诺半岛 

分 类 号：P612[天文地球—矿床学]