滇西施甸地区泥盆系向阳寺组混合沉积研究

近年,在滇西施甸地区泥盆系向阳寺组中发现陆源碎屑与海相碳酸盐的混合沉积,宏观特征上表现为由陆源碎屑与碳酸盐交互沉积、陆源碎屑与混积物、碳酸盐与混积物和混积物本身的交互沉积构成的混积层序,微观上表现为同一岩层内由陆源碎屑组分与碳酸盐组分混合沉积形成混积岩。向阳寺组混积岩的研究有助于重塑该地区古气候及沉积环境,因此具有重要的地质意义。

Reaearch of Mixed Sedimentation of Xiangyangsi Formation of The Devonian System in Shidian Area of Western Yunnan

In recent years, mixed sedimentation of terrigenous elast and marine carbonate is found in Xian- gyangsi formation of Devonian in Shidian area, it represents the mixed sequence of terrigenous clast and car- bonate, terrigenous clast and diamictite, carbonate and diamictite, diamictite on the view of macroscopic. On the view of microscopic, it represnets the diamictite formed of terrigenous clasfic component and carbonate component in the same stratum. The study will be helpful for remaking the paleoelimate and sedimentary envi- ronment of this area, therefore it has very important geologic significance.