安徽宿松群的甄别及时代归属

通过对原宿松群的深入研究 ,将其解体为蒲河片麻岩套与宿松岩群。宿松岩群与大别群在南部经历了先侵入 ,后韧性剪切变形 ,再构造破碎的复杂过程 ,并非不整合接触 ;在北部为过渡或构造叠置关系。重新厘定宿松岩群的构造地层序列自下而上由甘田坳岩组 (新建 ) ,柳坪岩组、大新屋岩组、梓树坞岩组 (新建 )所组成 ,并从地层序列、微古组合、地质年代等方面论证了宿松岩群属新元古代 ,为重新认识大别造山带的形成演化提供了新的基础资料

Progress in the Research of Susong Group and it's Geological Significance

According to the detail researches on former Susong Lithogroup,We Suggest that it can be divided into two parts: Puhe Gneiss unit and Susong lithogroup. We also found the contact relationship between Dabie Group and Susong lithogroup in south is not unconformable.It experienced a very complicated process with first invading, then ductile shearing, at last tectonic fracturing. We reconsidered the tectonic stratigraphic sequence of the Susong lithogroup is conbined of Gantian'ao litho formation (new formed), Liuping litho formation, Daxinwu litho formation and Zishuwu litho formation(new formed) in ascending order. According to studyies on the tectonic stratigraphic sequence, micropaleontology group and chrononology, It suggustas that Susong litho group belong to New Proterozoic. And ti is the new basic imformation for us to reconsider the forming and evolotion of Dabie Orogenic Belt.