陕西煎茶岭镍矿床控矿因素及找矿标志 |
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引用本文: | 李静,;董王仓,;郭立宏,;朱伟,;陈艳,;郑向光.陕西煎茶岭镍矿床控矿因素及找矿标志[J].西北地质,2014(3):54-61. |
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作者姓名: | 李静 ;董王仓 ;郭立宏 ;朱伟 ;陈艳 ;郑向光 |
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作者单位: | [1]陕西省地质调查中心,陕西西安710016; [2]陕西省地矿局第二综合物探大队,陕西西安710016 |
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基金项目: | 中国地质调查局全国矿产资源潜力评价项目“陕西省矿产资源潜力评价”(1212010813026) |
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摘 要: | 陕西略阳煎茶岭镍矿位于勉略结合带上,成矿区带属勉略华力西—印支蛇绿杂岩Mn-P-Cr-Ni-Au成矿亚带之略阳金家河-汉中天台山锰磷镍远景区内;矿床成因为岩浆熔离-热液改造型,赋矿岩体为元古代(Pt3)变质(蚀变)超基性岩,早期含镍超基性主岩体是成矿基本场所,后期中酸性岩对超基性主岩体进行改造,总体上为低品位硫化镍大型矿床,伴生低品位Co。通过对矿床大地构造位置、岩体特征、矿体特征等分析,总结了矿床控矿因素及找矿标志特征,认为该矿床成矿作用主要受镁质超基性岩、构造破碎带控制,中酸性侵入岩提供了镁质超基性岩再造成矿所需的热动力。
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关 键 词: | 略阳煎茶岭镍矿 控矿因素 找矿标志 |
The Ore Control Factors and the Ore--prospecting Indicators of the Jianchaling Nickel Ore in Shaanxi Province |
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Institution: | LI Jing , DONG Wang-cang , GUO Li-hong, ZHU Wei , CHEN Yan , ZHENG Xiang-guang (1. Shaanxi Center of Geological Survey, Xi'an 710016, China; 2. No. 2 Comprehensive Geophysical Prospecting Team of Shaanxi Bureau of Geology and Mineral Resources, Xi'an 710016, |
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Abstract: | Lying in the Mianxian-Lueyang suture zone, Jianehaling nickel ore-forming belt locates inside the Jinjiahe-Tiantaishan Mn-P-Ni prospecting area in a subzone of Mn-P-Cr-Ni-Au mineralization of Mianxian-Lueyang Hercynian-Indosinian ophiolite rock; the origin of the deposit belongs to magmatic liquation-hydrothermal alteration. The main rock is the Proterozoic metamorphic ultrabasic rock, and early nickel-bearing ultrabasic main rock which was later transformed by acidic rocks is the basic metallogenie place. On the whole, the deposit is a large low-grade nickel sulfide ore deposit, associated with low-grade cobalt. By analyzing the ore geotectonic location, the rock body characteristics and the ore body characteristics, the ore control factors and ore-prospecting indicators are concluded. It is believed that the mineralization is controlled by the magnesium ultrabasic rock and the structural fracture zone, and the intermediate-acidic intrusive rock provided the reforming thermal dynamic power for the magnesium ultrabasic rock. |
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Keywords: | Jianchaling nickel deposit of Lueyang~ ore-controlling factors ore-prospecting indicators |
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