Characteristics of Hybrid Facies and Hybrid Sequence of Xiejiawan Member of Ganxi Formation in the Longmenshan Area, State w:st="on">Sichuan Province

• 责任者：Zheng Rongcai (State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation ; Chengdu University of Technology ; Chengdu 610059 ; China) ; Zhou Gang
• 刊名：Acta Sedimentologica Sinica
• 出版年：2010
• 卷期：28(1)
• 关键词：碎屑沉积作用 ; detrital sedimentation ; 层序地层学 ; sequence stratigraphy ; 龙门山 ; Longmen Mountains
• 页码：p.33-41
• 图表：7 illus., 1 table, 15 refs.
• 分类号：0803
• issnNo：ISSN1000-0550
• isbnNo：CN62-1038/P

Based on the data of cross sections and observation of thin sections, the Xiejiawan Member of Ganxi Formation, Lower Devonian in the Longmenshan is considered to be generated from hybrid type Ⅰsediments dominative of shelf shales. Its genetic mechanisms include the major intermittent mixing mode, which is resulted from the storm flow, and the autochthonous mixing mode. The sedimentary facies of the Xiejiawan Member can be divided into following microfacies, hybrid shore, hybrid clastic shelf, hybrid carbonate shelf, shore peritidal residual + hybrid tidal flat, hybrid shelf shale + distal storm flow, hybrid continental shelf shale intercalated with proximal sandy storm flow, hybrid shelf shale intercalated with proximal sandy hybrid storm flow, and hybrid shelf shale intercalated with organic bank and point reef.