吉林省石炭纪生物组合及其环境分析

CARBONIFEROUS BIO—ASSEMBLAGE IN JLLIN PROVINCE AND THE ANALYSIS ON ENVIRONMENT

吉林省早石灰世只分布于北部槽区的吉林中部一带,而晚石炭世除吉林中部外,还扩展到延边地区及吉林南部的台区。该时期地层中含腕足、珊瑚、蛀、勗、蜓、非蜓有孔虫、介形虫、苔藓虫、瓣鳃类、腹足类、钙藻、牙形剌,海百合茎及陆生植物等化石。生物与环境是辩证统一体,不同生物在不同环境下生活,每一特定环境必有特定生物组合。因而可利用生物组合来推测该时期的沉积环境。按照生物的生态特点、共生关系、保存状况及搬运破碎程度将我省石炭纪生物组合及其环境综述如下;

The early Carboniferous strata are distributed in the northern part of the geosynclinal area in central Jilin and extended to the Yanblan area and the platform area of central Jilin in late Carboniferous.These strata contain coral,Fusulinids,Foraminifera,bryozoa,calcareous algae,conodont,terres- trial plant etc.According to the ecological character of a lot of fossils,asso- ciation,occurrence,fragmentation etc.the author divides this Carbonifer- ous bio-assemblage into eaily and late Carboniferous types.Meanwhile, the author also analyses the palaeogeographic environment of the Carbonife- rous petrography according to the aboundant bio-assemblage.