九瑞地区晚石炭世威宁期古构造轮廓及对沉积相的控制

九瑞地区各沉积相带的展布是在特有的北东和北西西向断裂相互切割所形成的菱形网格状古断裂构造格局上发展起来的,这种古构造在同一应力场中形成,具有明显的继承性。它对本区晚石世岩相占地理,以及晚古生代以前的地层厚度,沉积相带及矿床(点)分布有显著的控制作用。同时也是岩体贯入、火山喷发、喷气、热泉活动及矿液运移的通道。

PALEOSTRUCTURAL CONFIGURATION AND ITS CONTROL OF SEDIMENTARY FACIES DURING CARBONIFEROUS PERIOD, WEINING AGE IN JIUJIANG - RUICHANG AREAS,JIANGXI PROVINCE

Through the analysis and study of the basement, stratigraphic distribution feature, depositional thickness, sedimentary facies, geochemi-cal features, magmatic activity, metallogenesis during Cambrian-Carboniferous Period in the Jiujiang-Ruichang areas, a train of NE and NWW deep fractures during Hercynian have been discovered. Two groups of NE and NWW direction deep farctures dissect each other and form a series of rhombic grid fracture framework, which not only control the developement and the evolution of the geological history but also control the sedimentary facies of Cambrian-Carboniferous period. The deep fractures are also the channel of volcanic eruption, hot spring activity and transport of ore solution. They form in the identical stress field, and possess distonct inheritance. The distribution of sedimentary facies zone are obviously controled by the deep fractures. The sedimentary facies zone are characterized by narrow distribution and fastly changing of facies during Carboniferous Period Weining age in the region. Especially, the syngenetic fracture (e.g. Shahajie-Fengshandong deep fracture) between beach margin and shallow-marine basin control the distribution of strata-bound Cu, Pb, Zn massive sulfide deposit in Carboniferous Period.