摘要
在华北石炭二叠纪内陆表海聚煤盆地，海侵的突发性和事件性，泥炭沼泽化的广泛性和等时性，是划分其层序内部构成单元的良好界面。研究表明，华北石炭二叠纪内陆表海聚煤盆地的层序结构为“二元结构型”，即“海侵－高位”，缺少低位体系域。海侵体系域由１～２个小层序构成，而高位体系域由小层序构成。体系域恰与小层序组对应，海侵小层序组表现为弱退积－加积型，而高位体系域则表现为弱进积－加积型。小层序为高精度的岩相古地理编图单位，它为解析层序格架和煤聚积规律提供了最可靠的依据。
The Pemo-carboniferous epicontinental coal-accumulating basin in North China differsgreatly to the continental marginal sea basin of North America in geological condition.Theepisodicity and eventness of transgression, the extensiveness and isochroneity are goodsurfaces for the classification of internal architectural units in sequence.Study shows thatthe architecture of sequence in the Pemo-carboniferous epicontinental coal-accumulatingbasin in North China is“dualistic pattern”,that is,“transgrassive-highstand”,lack of low-stand system tracts. The transgressive system tracts are composed Of one to two parase-quences, and highstand system tracts consist of more than two parasequences.The systemtracts are all just corresponding to parasequence set.Transgrassive parasequence sets areweak retrogradational-aggradational type and the highstand system tracts are weak progra-dational-aggradational type.The parasequences are high precision map-compiling unit.They can provide reliable basis for the analysis of sequence fralne and coal accumulation.
出处
《地球科学进展》
CAS
CSCD
1994年第6期65-70,共6页
Advances in Earth Science
基金
国家自然科学基金
关键词
陆表海
含煤地层
层序地层分析
聚煤盆地
Epicontinental sea,Coal measures,Sequence stratigraphical analysis,Permo-carboniferous,North China.
