长江中下游成矿带成岩成矿作用研究进展

Advances on petrogensis and metallogeny study of the mineralization belt of the Middle and Lower Reaches of the Yangtze River area

长江中下游成矿带是中国最主要的铜铁金多金属成矿带之一,由鄂东南、九瑞、安庆—贵池、铜陵、庐枞和宁芜等位于断隆区、断凹区和隆凹过渡区的多个矿集区组成,成矿带形成经历了中生代转换复合的构造体制、强烈的壳幔相互作用等复杂的大陆动力学过程,具有爆发式的多阶段岩浆活动、大规模的铜铁金多金属成矿作用和多类型的复杂成矿系统演化,以及深部找矿潜力巨大等特点,是开展陆内动力学过程与成岩成矿作用研究的不可多得的天然实验室。本文从成岩成矿构造背景、地球动力学过程、时空格架以及成矿流体系统演化等方面,对近十年来国内外学者对该成矿带成岩成矿作用研究的主要成果和进展作一初步归纳,并简要分析了下一步研究的主要科学问题。

The mineralization belt of the Middle and Lower Reaches of the Yangtze River area is one of the most important mineral belt in China. It is composed of a series of ore deposits-concentrated areas such as the southeast Hubei, Jiurui, Anqing-Guichi, Tongling, Luzong and Ningwu etc. which located in the fault uplift, fault basin and the intermediated units. The formation of this mineralization belt had undergone a Late Mesozoic transitional composite tectonic setting and complex geocontinental dynamic processes of intensive crust-mantle interactions. The characteristics of explosive multistage magmatism, the large scale of Cu, Fe, Au ploymetallic mineralization and the multistyle complicated fluid ore-forming systems and the prospective deep mineral resources make this mineral belt an excellent natural laboratory for study the relationships between the inner-continental geodynamic processes and the petrogensis and metallogeny. In this paper, the authors have a fully extensive discussion and summarization of the newly research progresses on the tectonic settings, the geodynamic procresses, the temporal-spatial framework and the evolution of fluid ore-forming systems in this decade by researchers, the existing unsolved scientific questions and the next stage of hot topics for research are also put forward.