【摘要】 东川拖布卡金矿是滇中昆阳群地层找矿的重大突破 ,金资源量达大型矿床规模。分褐铁矿型和石英脉型金矿石两类 ,以石英脉型金矿石为主 ,地表为氧化矿石。金矿成矿受中元古界昆阳群美党组及其近NS向脆 韧性剪切带的双重影响和控制。含金石英脉中石英的　4 0 Ar 39Ar法测年结果 :视年龄值在 4 2 38× 10 6 a～ 5 9 93× 10 6 a之间 ;等时年龄为 4 1 2 5× 10 6 a～5 9 34× 10 6 a ;反等时年龄为 4 0 2 4× 10 6 a～ 5 6 2 5× 10 6 a ;反映金的富集主要形成于喜马拉雅期 ,新生古储的特点十分明显。更多还原

【Abstract】 The discovery of Au deposit in Tuobuka of Dongchuan is one of the very important advances of ore-prospecting works in Kunyang Group. The ore-bearing Meidang Formation was formed in （the late） stage of the evolution of Kunyang taphrogeosyneline. There are two types of ores. And the main one is the Au-bearing quartz vein. According to the⁴⁰Ar-³⁹Ar dating of quartz mineral, the age values are 42.38 MaBP～59.93 MaBP. This indicates that the Tuobuka Au deposit was formed mainly in Himalayan period.更多还原