地球动力学演化与巨型矿集区的形成

地球动力学演化与大型、巨型矿床之间的联系是近年来国际地学界所关注的前沿问题之一。通过编图发现，巨型矿集区是全球矿床分布最显著的特征，它同地球动力学的演化过程有着密切的联系。文章从全球构造的演化历史角度划分了五个地球动力学成矿阶段，并指出新太古代—古元古代的微板块运动和中、新生代环太平洋板块的俯冲作用对全球主要巨型矿集区的形成起着决定性的作用。其中所发现的环太平洋带上巨型矿集区的分段性分布特征，可能跟太平洋板块俯冲的非均一性和大陆边缘地体增生前的组成差异有关。文章在分析国外研究地球动力学与大型、巨型矿床之间关系的主要思路的基础上，提出了在中国开展巨型、大型矿集区地球动力学研究的一套设想。

GEODYNAMICS AND THE FORMATION OF GIANT DEPOSIT CLUSTERS

Based on the analysis and study of the geodynamic background, deposit type and distribution of more than one thousand of large, super large metal deposits, we find that the giant deposit clusters are the prominent feature of large, super large deposit distribution. The formation of these giant deposit clusters are controlled by the evolution of geodynamics which can be divided into five stages, i.e, (1) primary crust formation(2 8～3 5Ga of earlier); (2) micro plate tectonic movement(1 8～2 8Ga); (3) rapid accretion of the crust(0 85～1 8Ga); (4) paleo cycle of super continents(0 25～0 85Ga); (5) neo cycle of super continents(0～0 25Ga). Most giant deposit clusters were formed during the late Archean to early Proterozoic micro plate movement and Mesozoic Cenozoic Pacific plate subduction. The segmentation of Circle Pacific Ocean metallogenic belt may be related to the differential of Pacific plate segments and the composition difference of accreted terranes. The investigation and study of giant deposit clusters in the framework of geodynamic gevolution will be the challenge of matellogeny in the next century.