摘要
本文首先讨论了该礁的生物组成。在此基础上,对礁体进行群落古生态学研究,从而划分出五种群团和十种群落,并对群落的演替及生活环境进行了探讨。通过对礁体的沉积岩石学研究,提出了礁组合岩石结构类型的概念,共划分出六大类十二种岩石结构类型,并讨论了它们的形成环境。最后,讨论了礁发育的特点及海绵礁的形成环境。
Well-developed Early Permian algal-calcisponge reefs are situated in the vicinity of Xiangbo, about 40 km NW of Longlin County, Guangxi Province.
These reefs are mainly constructed by calcareous algae, fusulinids and foraminifers, calcisponges and sclerosponges, hydrozoans, bryozoans and microproblematica, 119 species belonging to 84 genera have been described and illustrated by the author. Among them, 70 species and 38 genera are new.
According to their functions, 5 guilds are recognized from the reef fauna. These are frame-building guild, baffling guild, binding guild, dweller guild and epibiont gui ld. Ten types of communities controling varibus episodes of reef development have been distinguished. These are: A) fusulinids community, B) epibiont-phylloid algae community, C) Archaeolithoporella-framer community, D) Archaeolithoporella-epibiontframer community, E) dweller-framer community, F) dweller-baffler community, G) bryozoan-Tubiphytes community, H) Anthracoporella community, I) Archaeolithoporella-Monostysisyrinx community, J) foraminifera-Dasycladaceae community. Their succession and environments in which individual communities lived are also discussed.
Based on the sedimentological study of the reef complex rocks, the concept of textural type of reef complexrocks is proposed. A primary texture classification, including 6 categories and 12 types, is established. Each textural type is formed under a special environment during the reef growth.
Finally, the features of reef growth and the conditions on which a algal-calcisponge reef is developed are discussed.
出处
《地质论评》
CAS
CSCD
北大核心
1989年第1期52-59,共8页
Geological Review
