准噶尔造山带碰撞体制的成矿作用及金等矿床分布规律  

MINERALIZATION DURING COLLISIONAL OROGENESIS AND ITS CONTROL OF THE DISTRIBUTION OF GOLD DEPOSITS IN JUNGGAR MOUNTAINS, XINJIANG, CHINA

作　　者：陈衍景[1] 

机构地区：[1]北京大学地质学系

出　　处：《地质学报》1996年第3期253-261,共9页Acta Geologica Sinica

摘　　要：准噶尔造山带是乌拉尔—蒙古造山带的重要组成部分。该区的碰撞造山作用主要发生在石炭纪和二叠纪,并经历了先挤压后伸展的演化过程。区内的金等矿床主要就位于晚石炭世—二叠纪,集中分布在碰撞造山作用较强烈的地带,矿床形成于碰撞作用的挤压—伸展转变期。因此该区金等矿床的成矿时间、空间和地球动力学背景等与碰撞造山作用发生的时间、空间及动力学背景完全吻合,表明适于用碰撞造山成矿模式指导找矿和研究。而该区矿床的实际分布也确与碰撞造山成矿模式完全一致。The Junggar orogen, Xinjiang, China, is an important part of the Ural-Mongolian orogen as well as one of the typical collisional orgenic areas. The collisional orogenesis in the area occurred in the Carboniferous and Permian, and shows the character of the early compression and late extension. Mineralizations of gold and other metals in the Junggar orogen occurred mainly in the Permian and in a few cases in the Late Carboniferous. Hence gold mineralization took place contemporaneously with collisional orogenesis. Gold deposits are mainly distributed in areas where collisional orogensis was intense, which indicates a spatial consistence between collisional orogenesis and gold mineralization. The mineralization geodynamic setting occurred in the transition stage from collisional compression to extension. The matching of gold mienralization with collisional orogenesis in time, space and geodynamic setting supports that the metallogenic model for collisional orogenesis should be the metallogenic model of gold deposits in the Junggar orogen. And a great deal of facts evidenced that the distribution of gold deposits and other mineral deposits of the Junggar orogen abides by the metallogenic model for collisional orogenesis, or in other words, is controlled by the metallogenic model.

关 键 词：造山带 碰撞造山作用 成矿作用 金矿床 分布规律 

分 类 号：P612[天文地球—矿床学] P618.510.5[天文地球—地质学]