中条山地区铜矿分布规律几点认识

Some Opinions on Distrbution law of Copper Ores in Region of the Zhongtiaoshan Mountains

中条山地区为我国重要的铜矿产地之一。区内分布的铜矿类型主要有横岭关,铜矿峪、篦子沟三种类型。横岭关和篦子沟两种类型铜矿为沉积变质型,铜矿峪型铜矿为变质斑岩型。它们分别产于中下元古界不同时代地层中。中条山地区为一古岛弧区。实际资料表明,中条山地区产于不同时代地层中的铜矿具有成矿继承性。中条山地区各种类型铜矿都遭受变质作用影响。除对其原始矿床形态产状进行改造外,主要是后期变质热液活动,淬取矿床或含矿岩石中有用组分,在条件适宜的场合下形成脉状铜矿,使矿床变得更富。总之,中条山地区各种类型铜矿,在时间和空间上的分布都是与古岛弧区的发展演化,及由此而产生的岩浆活动、构造变动、沉积及变质作用等重大地质事件密切联系在一起的。

The region of the Zhongtiaoshan Mountains is one of the most important bases of Copper ore in China. Three types of copper ores have been recognized in this region, namely, the Henglingguan type, the Tongkuangyu type and the Bizigou type. The first two types belong to a metamorphosed sedimentary copper ore deposit; the later to a metamorphic porphyry copper ore deposit. They eccur in the different age's strata of the Lower-middle Proterozoic Erathem. The region of the Zhongtiaoshan Mountains was an ancient island arc. Actual data have shown that these copper ores formed in different ages have a certain minerogenetic heredity. They have all been influenced by metamorphism. It is the metamorphism that reformed the attitude of the primitive ore deposits. However, it is more important that its late hydrothermal metamorphism extracted useful consitituents from the original ore deposits or ore-bearing rocks, and formed new veined copper ore deposits under suitable conditions, making the ore deposits more payable. In short, the temporal and spatial disiributions of the copper ores in this region are related closely to the development and evolution of the island arc. and also to such important geological events that resulted from the development and evolution as magmatic activity, tectonic event, sedimentation, metamorphism and so on.