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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Iron oxide-copper-gold mineralization at Thanewasna, western Bastar Craton
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Iron oxide-copper-gold mineralization at Thanewasna, western Bastar Craton

机译：Thanewasna，西方巴斯塔斯省氧化铁 - 铜金矿化

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摘要

Iron oxide-copper-gold (IOCG) at Thanewasna, Maharashtra, India is a new genetic type of ore deposit, being reported from the western margin of Bastar craton, based on integrated field, drilling, mineral chemistry and Raman microprobe studies. It is the fourth such IOCG type being reported from India. Hydrothermal mineralization is structurally confined to en echelon dilatational quartz-chlorite veins along NW-SE trending brittle-ductile shear zone hosted in calc-alkaline granitoid. The mineralization is characterized by chalcopyrite, magnetite and barite which occur as dissemination, stringers and veins associated with hydrothermal K-alteration and chlorite alteration. Chemical analysis shows significant amounts of Cu, Fe, Ba and anomalous Au content. Ore petrography and scanning electron microscope and electron probe micro analyser studies show assemblages of Cu-Fe-Au-Ag-Ni-Ba-REE minerals typical of IOCG type deposits at Thanewasna. Ore textures, mineralogy and alteration characteristics are typical of IOCG-type deposits, further supported by mineral chemistry of magnetite (V versus Ti/V) using EPMA, and thus define a IOCG metallogenic province in Thanewasna area with significant implications for future exploration.
机译：氧化铁 - 铜金（IoCG）在毕比阿斯纳，Maharashtra，印度是一种新的遗传类型的矿床，这些矿物矿床是根据综合领域，钻井，矿物化学和拉曼微探针研究的基于Bastar Craton的西缘。它是来自印度报告的第四种此类IOCG类型。水热矿化在结构上局限于沿钙碱性花岗岩中托管的NW-SE趋势脆性鳞状剪切区的EN梯队扩张石英 - 亚脉络。矿化的特征在于黄铜矿，磁铁矿和晶粒，其发生与水热k变换和氯酸盐改变相关的传播，纵梁和静脉。化学分析显示大量Cu，Fe，Ba和异常的Au含量。矿石透视和扫描电子显微镜和电子探针微分析仪研究表明Cu-Fe-Au-Ag-Ni-Ba-ree矿物的组装，典型的Iocg型沉积物在Thanewasna。矿石纹理，矿物学和改变特征是典型的IoCG型沉积物，通过EPMA的磁铁矿矿物化学（V与Ti / V）进一步支持，因此在WakeAkna地区定义了IoCG成熟省，对未来的勘探有重大影响。

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