川东北地区长兴期生物礁结构分类及分布  

Structure Classification and Distribution of Reefs of Changxing Group in Northeast Sichuan

作　　者：曾伟[1,2] 徐建斌[1,2] 黄继祥[1,2] 张廷山 

机构地区：[1]西南石油学院勘探系 [2]四川石油管理局地调处

出　　处：《沉积学报》1998年第3期132-136,共5页Acta Sedimentologica Sinica

摘　　要：长兴期生物礁按结构分为成熟生物礁、半成熟生物礁和未成熟生物礁三种类型。成熟生物礁具有规模大、形态复杂、结构完整、造礁生物多、变浅相序等特点，未成熟生物礁具有规模小、形态简单、结构不完整、造礁生物少、变浅再变深相序等特点，半成熟生物礁的特点介于两者之间。成熟生物礁分布于台坪与台凹深水的过渡地带和台地边缘，半成熟生物礁分布于台坪与台凹次深水过渡地带，未成熟生物礁分布于台坪和台凹中。According to structure features,the Changxing reefs are classified as mature,semimature and immature reefs.The mature reefs have the characteristics of large scale,complex shape,complete structure,lots of hermatrypic organisms and shallowing sedimentary sequence.The immature reefs have the characteristics of small scale,simple shape,incomplete structure,a few hermatrypic organisms and deepening sedimentary sequence.The semimature reefs' characteristics are between the mature reefs and the immature reefs.The mature reefs are distributed over platform edge and transition of platform flat and platform mulde deep water.The semimature reefs are distributed over transition of platform flat and platform mulde semideep water.The immature reefs are distributed over platform flat and platform mulde.

关 键 词：生物礁 结构 成熟度 分布 礁岩 

分 类 号：P588.248[天文地球—岩石学]