动力系统转换与金成矿作用

Dynamic System Transformation and Gold Ore-forming Process

动力系统转换与成矿是成矿作用动力学深层次的探索，它是在单一动力系统基础上进行系统与系统 间成矿作用的研究。经对华北地台北缘夹皮沟金矿带的研究，认为它们主要分布在多性质动力系统之间，即海底扩 张－大陆张裂之间、古陆隆起－边缘滑脱之间、韧－脆性剪切之间和高序次－低序次之间的转换和过渡地带，各过 渡地带的构造转换机制分别经历过分支拉压双生性、蠕变重熔活化性、对剪渗透萃取性和弯曲脉动贯入性四个阶 段。对各阶段不同动力系统间的转换成矿机制的研究将加深对金矿床成因和成矿背景的认识，通过各自动力系统 的鉴别，可将成矿预测集中转向于不同动力系统间的转换地段。

Dynamic system transformation and ore-forming process constitute deep-level researches in metallogenic dynamics, being a metallogenic study between different systems on the basis of a single dynamic system. A study of the Jiapigou gold deposit indicates that gold deposits on the northern margin in the North China platform are mainly distributed in the transformation areas between seafloor spreading and continental tension fracture, between ancient continental uplift and edge delamination, between ductile shear and brittle shear and between high order and low order. Tectonic transformation mechanism of every transformation area underwent four stages, namely ①twinning of branch tension-compress, tension-tension, and compress-compress; ② wriggling, melting and mobilization; ③opposing shearing, osmosis and drawing; ④bending and pulsing injection. A study on transforming metallogenic mechanism of different dynamic systems at different stages will broaden our knowledge on geneses and metallogenic settings of gold deposits. According to differences between dynamic systems, the metallogenic prognosis can be turned mainly to the transformation area between different dynamic systems.