云南东川地区含金剪切带型金矿

云南东川地区含金剪切带型金矿，1995年11月由云南八0七队从蒋家湾开始发现首个金矿段，继而向北勘查扩大到七角地和新山矿段。随着勘查的深入及大比例尺地质图填制，证实该金矿处在剪切破碎带中，并具大型以上规模前景。特别是新山矿段中砂糖状石英脉的发现，和矿体顶板接触带构造透镜体、糜棱岩的存在，含金韧性剪切带型金矿的特征渐趋明朗。云南昆阳群中多处发现含金石英脉，从拖布卡金矿的事实，促使我们重新考虑其中是否亦有剪切带型金矿类型。观念的转变，有可能促进昆阳群找金的突破。

THE GOLD DEPOSIT IN GOLD-BEARING SHEAR ZONE OF DONGCHUAN AREA, YUNNAN

In the Tuobuka Au-bearing shear zone, the first Au block was discovered at Jiangjiawan by the geological team 807 in November, 1995. Then, the exploration area was extended northwards to Qijiaodi and Xinshan. Following the further exploration and geological mapping of large scale, it proved to be a gold deposit with large potentiality in the shear fracture zone. The characteristics of Au deposit in the Au-bearing tough shear zone become clear because of the discovery of granulated sugar-like quartz vein in xinshan ore block and structural lens and mylonite in the contact zone of ore-body top. According to the Tuobuka Au deposit, we must consider the possibility of discovering the shear-type Au deposit in Kunyang Group with Au-bearing quartz veins in Yunnan.