长江中下游岩浆岩地球化学特征及岩石成因研究综述

Research on Geochemical Features and Petrogenesis of Magmatic Rocks from the Yangtze River Middle and Lower Reaches Region

长江中下游岩浆岩带主要由3个系列岩浆岩组成:1)高钾钙碱性系列,发育在以铜陵、安庆地区为代表的隆起区;2)橄榄安粗岩系列,发育在以庐枞、宁芜地区为代表断陷火山岩盆地内;3)A型花岗岩类(碱性侵入岩和花岗岩),沿长江断裂分布,隆起区和断陷区均有出露.文章通过搜集和综合研究前人资料,对长江中下游岩浆岩地球化学特征,以贵池地区、繁昌盆地、庐枞、铜陵等矿区为主要研究区域,就主量元素、微量元素、稀土元素、同位素等方面进行对比论述,从大地构造环境和地球化学特征对岩石成因进行分析.

The Yangtze River middle and lower reaches region magmatic beh is mainly composed of three series of magmat- ie rocks： ① high-K cole-alkaline series, developed in Tongling, and Anqing, representing the uplift; ①olive latite series, developed in Luzong and Ningwu regions, representing in the voleanic rift basins;③A type granites （alkaline intrusive rocks and granite） , fracture distribution along the Yangtze River, uplift and rift zones are exposed. Through basic and com- prehensive eollection of information on previous studies of geochemical characteristics of igneous rocks of the Yangtze River middle and lower reaches region to Guiehi region, Fanehang basin, Luzong, Tongling mining as the main studying areas, the major elements, trace elements, rare earth terms of characteristic elements and isotopes are compared, the petrogenesis is analyzed from the tectonic environment and geochemical eharaeteristies.