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江西修水县西北部元古代九岭群大坑组露头较好，各种原生沉积构造及次生变形构造发育．运用地层学、沉积学与构造地质学相结合的方法建立了其地层层序，探讨了其变质变形特征、沉积古地理与构造古地理．根据大坑组的岩石学特征、沉积相及岩石地球化学特征，推测其为活动大陆边缘弧后盆地浊积扇沉积的产物
In the northwestern part of Xiujiang County, Jiangxi Province, the Daping Formation of the Proterozoic Jiuling Group is better exposed, with various primary sedimentary structures and secondary deformations developing. Using stratigraphy, sedimentology and tectonic geology, the stratigraphic sequence was established and the characteristics of metamorphism and deformation, sedimentary paleogeography and tectonic paleogeography were discussed. According to the petrological characteristics, sedimentary facies and geochemical characteristics of the Taikeng Formation, it is speculated that it is the product of turbidite fan deposition in the active continental margin arc