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    新疆香山铜镍硫化物矿床岩浆深部过程与找矿方向探讨

    尹希文

    尹希文. 新疆香山铜镍硫化物矿床岩浆深部过程与找矿方向探讨[J]. 西北地质, 2015, 48(3): 22-30.
    引用本文: 尹希文. 新疆香山铜镍硫化物矿床岩浆深部过程与找矿方向探讨[J]. 西北地质, 2015, 48(3): 22-30.
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    YIN Xiwen. Magma Deep Process and Prospecting Direction of Xiangshan Ni-Cu deposit, Eastern Tianshan, Xinjiang[J]. Northwestern Geology, 2015, 48(3): 22-30.
    Citation: YIN Xiwen. Magma Deep Process and Prospecting Direction of Xiangshan Ni-Cu deposit, Eastern Tianshan, Xinjiang[J]. Northwestern Geology, 2015, 48(3): 22-30.
    shu

    新疆香山铜镍硫化物矿床岩浆深部过程与找矿方向探讨

    • 新疆维吾尔自治区有色地质勘查局704队, 新疆 哈密 839000

    Magma Deep Process and Prospecting Direction of Xiangshan Ni-Cu deposit, Eastern Tianshan, Xinjiang

    • No.704 Geological Party, Xinjiang Geological Exploration Bureau for Nonferrous Metals, Hami 839000, Xinjiang, China

    摘要

      摘要
    • 摘要: 香山铜镍矿体主要赋存于香山中岩体,与东天山地区其他典型铜镍矿床形成时代、岩浆源区性质、部分熔融程度及构造背景一致, 香山铜镍矿床中镁铁-超镁铁岩在岩体中所占比例小于20%,明显低于图拉尔根矿床超镁铁岩比例(约90%),暗示与图拉尔根矿床相比香山地区铜镍矿剥蚀深度较小, 深部具有继续寻找超镁铁质含矿岩体的潜力。香山矿床3个主要矿体(Ⅰ-1、Ⅰ和Ⅱ号矿体)由西向东Cu含量逐渐降低, Ni/Cu平均值分别为1.49、1.74和2.25, 呈逐渐增加的趋势, 且由西向东超镁铁岩比例变大, 这都表明含硫化物珠滴的岩浆流动为由东向西。高精度重力和磁法测量表明香山东和香山中岩体深部应该是相连的, 二者结合部位是深部含矿岩浆上升的通道。可控源音频大地电磁测深(CSAMT)揭示深部存在低阻异常体, 结合已施工的ZK4401和ZK5202地质资料, 认为该低阻异常体为含矿超镁铁岩的主体, 是下一步深部找矿的重点勘查对象。
      Abstract: Xiangshan Ni-Cu orebody mainly occurred in the middle of Xiangshan intrusion. The tectonic setting, age of formation, nature and partial melting of magma source are consistent with those of other typical Ni-Cu deposits of eastern Tianshan. The proportion of mafic-ultramafic rocks in Xiangshan Ni-Cu deposit is less than 20%, obviously lower than that of Tulaergen deposit, which is about 90%, implying that the erosion depth of intrusion located in the west of Tulergen-Huanshandong-Tudun belt is smaller than the Tulargen deposit, and the deep of Xiangshan deposit has a great exploration potential. The Cu metallic elements and ratio of Ni/Cu have regular variation along the strike of intrusion. Throughout the tree major intrusions of Xiangshan deposit, the Cu content decreases from west to east while the Ni/Cu ratios gradually increases, with an average of 1.49, 1.74 and 2.25 respectively, suggesting that the sulfide droplets-containing magma lava flows from east to west. The high precision gravity and magnetic result indicate that intrusions in east and middle Xiangshang are connected in the deep. The binding site of the two intrusions may be the rising channel of sulfide-bearing magma. The CSAMT reveals that there is a large low resistivity in the deep, which may be the main ultramafic rocks according to geological data of ZK4401 and ZK5202, and would be the major focus of further deep ore prospecting.
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    • 收稿日期:  2015-01-06
    • 修回日期:  2015-04-13
    • 发布日期:  2015-09-04

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