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为明确饶阳凹陷蠡县斜坡沙河街组沙一段物源组合与沉积体系配置关系,针对饶阳凹陷蠡县斜坡沉积缓坡带多物源供给的特征,结合传统物源研究方法,通过碎屑锆石年龄谱与物源区基岩年龄对比,精细刻画沙河街组沙一段物源体系.依据沙一段古地貌差异及钻井分布特征,将斜坡划分为A、B、C 3个区,对应3个物源体系,研究表明,西北部物源体系母岩为华北北缘及兴-蒙造山带晚古生代(Pz)火成岩,由古大清河水系自西北向斜坡A区供源;西部物源体系母岩为涞源地区中生代(Mz)火成岩、中-新元古界(Pt_(2+3))侵入岩、中-新太古代(Ar_(2+3))变质岩,由古唐河水系自西向斜坡B区供源;西南部物源体系母岩为五台地区古元古代(Pt1)滹沱系变质岩、中基性火成岩,由古大沙河水系自西南向斜坡C区供源.且碎屑锆石含量与流域面积成正相关关系.
In order to clarify the relationship between provenance and sedimentary system of the first member of Shahejie Formation in the Lixian Slope of the Raoyang Sag, the characteristics of multi-source sediments in the sedimentary slope of the Lixian Slope in the Raoyang depression, combined with the traditional provenance study, According to the paleogeomorphic differences and drilling distribution characteristics of Shahejie Formation, the slope is divided into three zones A, B and C, corresponding to three The provenance system shows that the source rocks in the northwestern part of China are the late Paleozoic (Pz) igneous rocks in the northern margin of North China and the Xing-Meng orogenic belt and are sourced from the northwestern part to the slope A in the ancient Daqinghe river system. The rocks are Mz igneous, Meso-Neoproterozoic (Pt_ (2 + 3)) intrusive rocks and Meso-Neo-Archean (Ar_ (2 + 3)) metamorphic rocks in the Yuyuan area, The source rocks in the southwestern part are source rocks of the Paleoproterozoic (Pt1) Hutuo-type metamorphic rocks and medium-base igneous rocks in the Wutai area, which are sourced from southwest to slope C in the ancient Dashahe River system. Zircon content and basin area are positively correlated.