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主管单位:中国地质调查局

主办单位:中国地质调查局西安地质调查中心
中国地质学会

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    菲律宾保和岛达瑙镍矿地质特征及成因探讨

    陈德杰

    陈德杰. 菲律宾保和岛达瑙镍矿地质特征及成因探讨[J]. 西北地质, 2012, 45(3): 103-108.
    引用本文: 陈德杰. 菲律宾保和岛达瑙镍矿地质特征及成因探讨[J]. 西北地质, 2012, 45(3): 103-108.
    CHEN De-jie. Geological Characteristics and Preliminary Study to Genesis of Danao Nickel Deposit in Bohol, Philippine[J]. Northwestern Geology, 2012, 45(3): 103-108.
    Citation: CHEN De-jie. Geological Characteristics and Preliminary Study to Genesis of Danao Nickel Deposit in Bohol, Philippine[J]. Northwestern Geology, 2012, 45(3): 103-108.

    菲律宾保和岛达瑙镍矿地质特征及成因探讨

    Geological Characteristics and Preliminary Study to Genesis of Danao Nickel Deposit in Bohol, Philippine

    • 摘要: 菲律宾保和岛达瑙镍矿床位于西比克尔-东莱特岛(Western Bicol-Eastern Leyte)蛇绿岩带附近,矿体分布在超基性岩体顶部的褐铁矿层、腐泥土层中,与地表红棕色土壤的分布范围基本一致.层中硅镁镍矿较为发育,主要含镍矿物为镍绿泥石、暗镍蛇纹石.化学分析结果显示成矿物质来源于超基性岩;对矿区超基性岩、气候、地理位置、岩石破碎程度等特征进一步分析研究,认为该矿床的成因类型为风化壳淋积矿床.地壳抬升超基性岩接受风化,释放出Ni2+.Ni2+随地表水下渗至褐铁矿层下部的腐泥土层(风化岩石)中被蛇纹石矿物捕获,富集成矿.类质同象中的Mg2+释放出来,由于本区地层渗透性好,Mg2+至基岩处富集.一般而言,红土层下面的风化岩石含Ni最富.
      Abstract: Danao nickel deposit is located near the Western Bicol-Eastern Leyte ophiolite belt. Ore-bearing limonite and saprolite layers above ultramafic rocks consisted with red-brown soil where garnierite ores developed well. Chemical analysis showed that the mineralization source is ultramafic rocks; further analysis and study on the ultramafic rock, climate, geography, and degree of rocks fragmentation suggested the genesis type of deposit is weathering crust-eluvial type. According to the crust uplift, the ultramafic rocks weathered to release Ni2+ which was captured by the serpentines when infiltrated to the limonite and saprolite layers with surface water, isomorphied and then released Mg2+. Due to the high permeability, Mg2+ were enriched near the basement rocks, while Ni2+ serpentine was into the limonite and saprolite layers, precipitated down, and concentrated to mineralize.
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    出版历程
    • 收稿日期:  2011-09-07
    • 修回日期:  2012-04-19
    • 发布日期:  2012-09-04

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