秦岭造山带的印支运动及印支期成矿作用

Indosinian movement and metallogenesis in Qinling orogenic belt

秦岭碰撞造山经历了长期的板块构造的俯冲-碰撞的构造演化,于印支期最终完成对接拼合,形成了统一的中国大陆,并由此转入陆内变形。众多Au、Mo多金属矿床的同位素年龄资料表明,印支期是秦岭的重要成矿期,其成矿作用明显受到构造演化的控制,反映特定的地球动力学背景和作用过程。秦岭印支期成矿作用不仅是中国东部中生代成矿作用的先导和开始,奠定了中国东部中生代成矿大爆发的基础,而且为碰撞期和碰撞期后构造体制快速转换的研究提供了依据。重视秦岭以及中国印支期成矿作用的研究,对正确认识秦岭成矿带的区域成矿规律、造山带演化的深部动力学过程,建立符合中国和东亚实际的印支期成矿理论体系具有重要科学意义。

Indosinian tectonic events in Qinling region include the collision between North China and South China plates, the post-collision collapse and subsequent intracontinental extension. Lots of isotopic ages of the ore deposits fall into the Indosinian period, suggesting the existence of not only Indosinian mineralization but also the relationship between tectonic evolution and mineralization under the geodynamic background. The Qinling Indosinian mineralization formed the basis of remarkable Mesozoic mineralization explosion in eastern China. Researches on Indosinian tectonic evolution and mineralization as well as their relationship have yielded important clues to the rapid transform of the tectonic system from the collision stage to the post collision stage as well as the relative process of continental dynamics.