摘要:
介绍了钦杭结合带与成矿带的提出过程及其基本特征,以及有关华南大地构造和华夏古陆问题的研究历史和现状。20世纪80年代中期在重新认定华夏古陆的基础上建立扬子与华夏古陆碰撞拼接模式,随之于20世纪90年代初提出钦杭结合带与成矿带,这是华南大地构造研究的重要转折,对华南大地构造和区域成矿的研究有着重要贡献。钦杭成矿带不仅在华南大地构造格局中占有十分重要的地位,对探讨全球Grenville造山、Rodinia超大陆裂解、新元古代成矿爆发等也有重要意义。目前已从岩石组合、构造特征、地球物理信息、成矿作用等方面对钦杭成矿带进行了论证。但毕竟钦杭成矿带的研究历史不长,还有许多基础地质和区域成矿问题尚无定论,为此提出了若干值得关注并可望在近期取得突破的问题。
Abstract:
The Qinzhou-Hangzhou (Qi-Hang) joint belt is located along the Neoproterozoic suture zone in South China, which separates the Yangtze and Cathaysian Blocks. This paper summarizes the proposed process and geological characterisitics of the Qin-Hang joint belt and Qing-Hang Metallogenic Belt, as well as the research history and present situation of tectonic evolution of South China block and Cathaysian block. In mid-1980s, the subduction/collision model between the Yangtze and Cathaysia Blocks was proposed based on the comprehensive understanding of the Cathaysia; followed in early-1990s, the Qin-Hang joint belt and Qin-Hang metallogenic belt were gradually proposed, which was an important turning point and contributed hugely in the tectonic and regional metallogenic studies of South China. This metallogenic belt play an important role in reconstructing the tectonic framework of South China, as well as in discussing the worldwide Grenvillian orogenesis, break-up history of the supercontinent Rodinia and the Neoproterozoic explosive mineralization. Previous studies of the Qin-Hang metallogenic belt have focused on the rock assemblages, tectonic features, geophysical information, metallogenesis, however, much of geological and regional metallogenic issues have no clear conclusion because of its not long research history, hence we proposed some problems worthy of studying and expected to make a breakthrough in the following years.
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