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地球学报  2011 

印度尼西亚塔里亚布岛锡铁多金属矿床的地质地球化学特征与成因

DOI: 10.3975/cagsb.2011.03.06

Keywords: 塔里亚布岛,地质地球化学,锡铁多金属矿床,矽卡岩型,矿浆型

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Abstract:

印尼塔里亚布岛新近发现大型锡铁多金属矿床,初步探明铁储量超过1亿吨,全铁品位可达50%。塔里亚布岛锡铁多金属矿床以矽卡岩型与矿浆型为主,兼具热液型,构成一个完整的成矿系统。印支期二长花岗岩源自地壳部分熔融产生的岩浆,是矿床的主要成矿物质来源与控矿因素;岩浆经过高度的演化分异过程,生成富铁矿浆贯入充填成矿,主要赋存于花岗岩体与石炭系地层接触带中岩体边界形态急剧变异部位和软、硬岩层的接触界面;矽卡岩型铁矿则赋存于石炭系(白云质)大理岩及含钙质变质砂岩与花岗岩体的接触带附近。矿床成矿时属环太平洋成矿域的东澳大利亚成矿带,经喜马拉雅运动位移至东南亚成矿带。

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