豫西北及晋东南地区下二叠统太原组风暴沉积及伴生遗迹化石特征

豫西北及晋东南地区下二叠统太原组碳酸盐岩中发育多层风暴沉积并含丰富的遗迹化石。通过对风暴沉积层的宏观及微观分析,特别是对各种风暴沉积序列及其所含遗迹化石的组成与分布特点的研究,在太原组碳酸盐岩中已识别出7种风暴沉积类型,与之伴生的遗迹化石有Zoophycos,Palaeophycus,Nereites.,Chondrites,Planolites,Palaeophycus,Helminthopsis,Teichichnus,Rhizocorallium,Thalassinoides和Ophiomorpha等。它们分别形成在海湾-潟湖、潮间-潮下浅滩、局限台地和潮下开阔台地沉积环境。该成果既可丰富我国华北盆地早二叠世含煤岩系的沉积类型,也可为深入研究该区早二叠世沉积演化乃至成煤与成气的古环境条件提供事件沉积和生物学方面的信息。

Lower Permian Taiyuan Formation Storm Deposit and Associated Ichnofossils Characteristics in Northwestern Henan and Southeastern Shanxi Area

In the lower Permian Taiyuan Formation carbonate rocks in northwestern Henan and southeastern Shanxi area developed multiple layers of storm deposit and abundant ichnofossils. Through macro- and micro-analysis of storm deposits, especially studies on various storm deposit sequences composition and distribution features of contained ichnofossils. In Taiyuan Formation carbonate rocks, 7 storm deposit types have been identified, associated ichnofossils have Zoophycos, Palaeophycus, Nereites., Chondrites, Planolites, Palaeophycus, Helminthopsis, Teichichnus, Rhizocorallium, Thalassinoides and Ophiomorpha etc. They had been formed in bay-la- goon, intertidal-subtidal shoals, restricted platform and subtidal open platform sedimentary environments. The study not only can ag- grandize early Permian coal-bearing rock series sedimentary types in North China Basin, but also for intensive study of early Permian sedimentary evolution and even coal and gas forming paleo-environment condition provide event deposit and biology information.