【摘要】 康滇地区位于扬子地块西缘,其古—中元古代地层主要由一系列变质沉积岩和变质火山岩组成。康滇地区独特的构造演化历史和成矿作用,使其成为研究扬子地块前寒武纪构造演化的热点地区。随着各种定年技术的发展,该地区近年来有大量精确的年代学研究成果被报道。总结和评述了有关扬子地块西缘康滇地区古—中元古代地层层序、岩浆活动和成矿作用以及构造演化的最新研究成果。虽然目前在该区没有找到有太古宇—古元古界底部地层出露,但大量碎屑锆石年代学数据指示康滇地区很可能广泛分布着太古宙—古元古代基底地层;康滇地区乃至整个扬子地块分布的古—中元古代岩浆活动,指示扬子地块在1.5~2.0Ga可能经历了碰撞造山到伸展的构造演化过程,而这一过程恰好与Columbia超大陆旋回一致。因此,扬子地块很可能就是古—中元古代Columbia超大陆的组成部分。更多还原

【Abstract】 Kangdian area,which is located in the western margin of the Yangtze Block,is important for studying the Precambrian tectonic evolution of the Yangtze Block due to its unique history of tectonic evolution and mineralization.The Paleo-Mesoproterozoic strata in this area are meta-volcanic and meta-sedimentary rocks.With the development of various dating techniques,a large number of accurate geochronological results have been reported from this area in recent years.Paleo-Mesoproterozoic stratigraphic sequence,magmation,mineralization and tectonic evolution in the Kangdian area of the western margin of the Yangtze Block were reviewed.Archean-Early Paleoproterozoic rocks are not outcropped in the Kangdian area,but a lot of detrital zircon geochronology data show that the distribution of Archean-Early Paleoproterozoic basement strata is probably widespread in this area;Paleo-Mesoproterozoic magmation in the Kangdian areaand even the whole Yangtze Block shows that the tectonic evolution history from collisional orogenesis to extension happens during 1.5-2.0Ga in the Yangtze Block,which is consistent with the cycle of Columbia supercontinent.Therefore,Yangtze Block may be a component of the Paleo-Mesoproterozoic Columbia supercontinent.更多还原