新疆东天山地区自然铜矿带地质特征

Geologic characteristics of native copper belt in the eastern Tianshan Mt area in Xinjiang

文章对新疆东天山自然铜成矿带的地质特征进行了研究,该自然铜矿化带处于觉罗塔格金、铜、铁构造成矿带内,自然铜矿点自西向东分布于十里坡地区、黑龙峰地区和长城山地区;自然铜矿点的赋矿围岩为下石炭统马头滩组玄武岩和凝灰岩,矿石矿物主要以自然铜和砷铜矿为主,自然铜矿点中铜含量较高;通过对十里坡和黑龙峰自然铜矿点2个地球化学剖面的研究和对比,表明成矿元素铜受地层控制明显,2个自然铜矿点在大地构造位置,赋矿地层,赋矿岩石、铜的赋存状态和成矿元素组合方面有很多共性,认为东天山若干自然铜矿点是同一成矿作用的产物,东天山地区可能存在连续几百公里的自然铜成矿带。

The geologic characteristics of the native copper belt in eastern Tianshan Mt, Xinjiang Uygur Autonomous Region have been studied in this paper. The native copper belt is located in the Qoltag Au-Cu-Fe structural and metallogenic belt and native copper ore spots occur in the Shilipo area, Heilongfeng area and Changshengshan area from west to east. The host rocks of the native copper ore spots are basalt and tuff of Lower Carboniferous Matoutan Group and the main ore minerals are native copper and arsenic copper. The copper content in the native copper ore is relatively high. Comparative studies of the two geochemical sections of the native copper ore spots in Shilipo and Heilongfeng respectively show that they have many common characters in the tectonic structural location, host strata, host rock, occurrence of copper and ore-forming element composition. It is thought that the native copper ore spots in the eastern Tianshan Mt are the product of the same metaitogenesis and a several-hundred-kilometer-continuous native copper belt may exist in the eastern Tianshan Mt area.