| 金川铜镍硫化物矿床中特富矿分布特征及成因 |
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| 引用本文： | 高亚林,乔富贵,卢健全,陈耕耘,王 珉,雷嘉航.金川铜镍硫化物矿床中特富矿分布特征及成因[J].地球科学与环境学报,2014(1):68-79. |
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| 作者姓名： | 高亚林 乔富贵 卢健全 陈耕耘 王 珉 雷嘉航 |
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| 作者单位： | 金川集团股份有限公司,甘肃金昌737104 |
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| 基金项目： | “十一五”国家科技支撑计划项目（2006BAB01808）;国土资源部公益性行业科研专项项目（201011058） |
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| 摘 要： | 块状特富矿是深部熔离-贯入型矿石的典型代表。通过地质模型来直观了解金川铜镍硫化物矿床中块状特富矿的空间分布:平面上分布于Ⅱ矿区33~41行之间,垂直方向上分布于1 150~1 500m标高范围内;根据其与Ⅱ矿区Ⅱ-②矿体的超基性岩的空间关系,将块状特富矿划分为岩体内部型和岩体边部型。通过对块状特富矿及其附近细脉浸染状矿的矿物成分测试,结果表明:块状矿石由98%以上的金属硫化物组成,金属矿物主要为磁黄铁矿、黄铁矿、黄铜矿、镍黄铁矿,其中,镍黄铁矿较发育,没有方黄铜矿;矿石中的磁黄铁矿均为单斜晶系,说明特富矿晶出温度很低,为100℃~320℃。首次对金川各类矿石中长石或石英进行液体包裹体测试,结果证明其成矿期晚于其他深部熔离-贯入型岩浆矿体。通过对成矿物质来源、成矿期次、控矿因素、成矿标志等的研究,指出块状特富矿分布受构造控制,与细脉浸染状矿石、含矿化辉绿岩脉密切相关,并认为NE向平推断层发育、且有细脉浸染状矿石或含矿化辉绿岩脉产出的部位是寻找块状特富矿的重点区域。
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| 关 键 词： | 铜镍硫化物矿床 块状特富矿 矿石特征 磁黄铁矿 成矿机理 深部熔离 金川 |
Distribution and Genesis of Massive Rich Ore in Jinchuan Cu-Ni Sulfide Deposit |
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| GAO Ya-lin,QIAO Fu-gui,LU Jian-quan,CHEN Geng-yun,WANG Min,LEI Jia-hang.Distribution and Genesis of Massive Rich Ore in Jinchuan Cu-Ni Sulfide Deposit[J].Journal of Earth Sciences and Environment,2014(1):68-79. |
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| Authors: | GAO Ya-lin QIAO Fu-gui LU Jian-quan CHEN Geng-yun WANG Min LEI Jia-hang |
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| Institution: | (Jinchuan Group Co. , Ltd. , Jinchang 737104, Gansu, China) |
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| Abstract: | Massive rich ore is typical of deep liquation-injection.Based on the geological model, the spatial distribution of massive rich ore in Jinchuan Cu-Ni sulfide deposit is that the ore occurs lines 33-41 of mining areaⅡ in the plane and elevation of 1 150-1 500 m in the vertical.According to the spatial relation of the ore to the ultrabasic rock ofⅡ-② orebody in mining areaⅡ,massive rich ore is divided into the internal type and the type of rock＆#39;s edge.According to the test results of mineral composition from massive rich ore and nearby veinlet disseminated ores,the massive ore is made up of more than 98% metal sulfides,which mainly include pyrrhotite,pyrite, chalcopyrite and pentlandite.Pentlandite develops,and there is no cubanite in the massive ore. Pyrrhotites in the ores are monoclinic,so that the crystallized temperature of massive rich ore is very low with the range of 100 ℃-320 ℃.The first test on fluid inclusions of feldspar or quartz from Jinchuan deposit shows that the metallogenic stage of massive rich ore is later than that of other deep liquation injection magmatic orebodies.Based on the study on the source of ore-forming materials,metallogenic periods,ore-controlling factors and mineralization mark,the distribution of massive rich ore is controlled by structure,and is closely related to veinlet＆amp;nbsp;disseminated ores and mineralized diabase dikes.In general,the key regions for prospecting massive rich ore have the characteristics of developing NE-trending blatt flaws and the outputs of veinlet disseminated ores or mineralized diabase dikes. |
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| Keywords: | Cu-Ni sulfide deposit massive rich ore characteristic of ore mineral pyrrhotite metallogenic mechanism deep liquation Jinchuan |
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