摘要
涧水沟生物礁是华蓥山地区上二叠统发育较好的礁体之一。由钙质海绵、水螅、Tabulozoa 和古石孔藻构成造礁生物。根据生物与环境的依存关系,分出7个生物群团,根据生物含量的统计分析分出8个生物群落,并描述了礁体中的水成岩墙、沟道沉积和古溶洞沉积。碓体的消亡与二叠纪末的生物大绝灭同时发生,因此华蓥山地区上二叠统生物礁是晚古生代层位最高的礁体。
Jiangshuigou reef is one of well developed Upper Permian reefs in the HuayingMountains.The reef-building organisms are calcareous sponges,hydrozoans,tabulozoansand Archeolithoporella etc.The development of the reef can be divided into two main cyclesand each of them contains three stages,that is,stabilization,colonization and diversion.Eight communities and seven guilds have been established according to fossil assemblage.The abundant vadose silts and dissolved caves filled with oolites and pellets indicate thatthe reef had been exposed several times during its development.The eustasy was the ex-ternal factor that controlled the development of the reef,while the ecological evolution ofthe organisms was the internal factor.The extinction of the reef-building organisms wasrelated to the mass extinction of organisms between Permo-Triassic boundary.So the reefsin the Huaying Mountains are the highest ones in the Paleozoic.
出处
《石油与天然气地质》
EI
CAS
CSCD
北大核心
1992年第2期147-154,共8页
Oil & Gas Geology
