【摘要】 本文研究了松辽盆地西部地区白垩系青山口组和嫩江组的淡水碳酸盐岩,对其结构组分、沉积特征、成岩作用和主要岩石类型进行了系统的论述,进而对其沉积环境和成岩环境提出了初步认识。该区碳酸盐岩以生物灰岩为主,其发育状况受沉积环境控制。各岩类的成岩环境表现出不同的序列特征。其中近岸带鲕粒灰岩和生物碎屑灰岩的成岩序列为:湖底—大气淡水渗流带—大气淡水潜流带—湖水潜流带—区域地下水潜流带。本文对本区碳酸盐岩的分布规律及其与油气的关系也进行了总结,最后还指出了油气勘探的有利地区和方向。更多还原

【Abstract】 This paper gives a systematic description of the fresh water carbonatite in Qing- shankou formation in Songliao basin.The structure,composition,sedimentation and diagenetic characteristics of these rocks are described,and divided them into several major types.A prelimenary discussion on the sedimentary environment and diagenetic process of these carbonate rocks is presented also.The carbonate strata is mainly consisted of bio-constituents,and their development has been controlled dominantly by sedimentation environment.Certain sequence has been resulted due to a its diagenetic environment for each type of rock.For example, the Oolitic and bio-clastic limestone generated in the near shore region has a dia- genetic sequence as fallows lake base,atmospheric water sinking zone,atmosph- eric water underflow zone,lake water underflow zone,and underground water underflow zone. The paper shows the distribution of the various types of the fresh water carb- onate rocks in the studied area and gives a summary of their relationship to pet- roleum occurence.In conclusion,this paper indicates the regions favorable for petroleum exploration.更多还原