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一、概述我省的前寒武纪花岗岩,以往缺乏确实的年龄依据,仅是据东邻江西省九岭岩体资料予以推测,且其分布限于湘东一隅。近期,我们队在湘赣边境地区开展1:5万区调工作,对一些花岗岩体进行采样测试等分析研究,迄今为止,认定我省确有证据的前寒武纪花岗岩有六处,即大围山岩体、长三背岩体、葛藤岭岩体、桂竹湾岩体、金狮冲岩体及佛岭冲岩脉(表1),均分布于江南地轴之次级构造单元九岭台背斜中,地理座
I. Overview The Precambrian granites in our province were lack of definite age basis in the past and were only speculated from the data of Jiuling rock mass in the east of Jiangxi Province and their distribution was restricted to the eastern part of Xiangdong. Recently, our team conducted a 1: 50000 regional transfer work in the border areas of Hunan, Jiangxi and some granite bodies for sample analysis. So far, there are six proven Precambrian granites in our province, namely, large Weishan pluton, Changsanback pluton, Ge Tengling pluton, Guizhuwan pluton, Jinshichong pluton and Foochong dyke (Table 1) are all distributed in Jiulunai sub - unit of Jiangnan axis Anticline, Geographic Block