地质通报Issue(7)：1067-1075,9.
西藏改则上三叠统日干配错组生物礁组成特征及演化
Composition and evolution of the Upper Triassic organic reef in the Riganpeicuo Formation of Gaize County, Tibet
摘要
Abstract
Organic reefs of the Upper Triassic are well developed in Gaize County of Tibet. The reef-building organisms consist of hexacorallia, calcispongiae and calcareous algae, whereas the reef-inserted organisms consist of foraminifera, brachiopods, bivalves, gas-tropods, echinoderms and bryozoans. Biological sequence from the bottom to the top of a single reef was developed through five stages:calcareous algae, bivalves and gastropods→calcareous algae, bivalves and hexacorallia→hexacorallia→hexacorallia, calcispongiae and bryozoans→bioclast. Correspondingly, the lithological sequence from the bottom upward can also be divided into five members:bioclastic limestone→bafflestone→frame stone→bind stone→Bioclastic and intraclastic limestones. The development of platform mar-gin reef generally includes three cycles, each of which has the same structural composition and can be divided into reef base, reef core and reef cap from the bottom upward. It is shown that the history of organic reefs has experienced four evolutionary stages, i.e., reef foundation, early flourishing, prosperousness and reef declining. Cycle ⅠandⅡare at a large scale, and have complicated construc-tion, whereas CycleⅢis small and simple comparatively. All of the three cycles have formed the secondary prograde sequence under a transgressive background.关键词
生物礁/成礁模式/上三叠统/日干配错组/西藏改则Key words
organic reef/reef-forming model/Upper Triassic/Riganpeicuo Formation/Gaize of Tibet分类
天文与地球科学引用本文复制引用
侯恩刚,高金汉,王根厚,王训练,徐涛,乔柏翰..西藏改则上三叠统日干配错组生物礁组成特征及演化[J].地质通报,2014,(7):1067-1075,9.基金项目
中国地质调查局项目（编号1212011121244）和中央高校基本科研业务费项目 （）
