鄂西利川见天坝长兴组海绵礁岩石类型及礁体演化阶段  

Rock types and evolution of reef of Changxing Formation in Jiantianba of western Hubei

作　　者：王延奇[1] 胡明毅[1] 刘富艳[1] 王辉[1] 胡治华[1] 

机构地区：[1]长江大学油气资源与勘探技术教育部重点实验室

出　　处：《岩性油气藏》2008年第3期44-48,88,共6页Lithologic Reservoirs

摘　　要：鄂西利川见天坝长兴组生物礁位于镶边型台地陡斜的边缘上,濒临鄂西海槽,属于台地边缘礁。该礁体的最大特点是大型柱状海绵丰富,构成生物骨架。生物礁岩石类型主要有障积岩、障积-骨架岩、骨架岩、粘结岩、角砾状灰岩5种。通过分析见天坝生物礁的生物类型、岩石宏观类型和特征,推测生物礁的发展演化经历了5个阶段:奠基期、拓殖期、泛殖期、衰亡期和礁盖期。Being located in the margin of platform and close to Western Hubei Trough, reef of Changxing Formation in western Hubei is a kind of platform marginal reef. The reefs have abundant large scale of cylindric sponges which compose the organic framework. There are mainly five types of rocks, including bafflestone, bafflestone-framestone, framestone, bindstone and breceiform limestone. Based on the analysis of the types of reefs and rocks, it is supposed that the evolution of the reef experienced five stages： foundation stage, pioneering stage, flourishing stage, decline stage and reef cap stage.

关 键 词：生物礁 发展演化 长兴组 见天坝 

分 类 号：P588.248[天文地球—岩石学]