承德地区石炭-二叠系层序岩相古地理  

Sequence-based Lithofacies Paleogeography of Permo-Carboniferous in Chengde Area

作　　者：朱宝存[1] 唐书恒[1] 张佳赞[1] 张钊[1] 

机构地区：[1]中国地质大学,北京100083

出　　处：《中国煤炭地质》2009年第1期5-8,16,共5页Coal Geology of China

基　　金：国家973计划课题(2006CB202202);国家863计划专题课题(2006AA06Z235);国家自然科学基金项目(40772096);教育部新世纪优秀人才支持计划(NCET-05-0211)

摘　　要：将层序地层学方法应用于岩相古地理研究中,首先建立承德地区石炭-二叠系层序地层格架,然后以四级层序为基本编图单元,编制岩相古地理图。分析了石炭-二叠系的沉积演化特征,讨论了层序地层、岩相古地理与聚煤作用的关系。在研究区识别出2个三级层序、5个四级层序、8个五级层序;揭示了海平面升降变化对成煤沼泽发育的控制,认为层序DS1的海侵或海退最大点处的四级层序Ⅲ控制了研究区两个主采煤层的发育。该结论对该区聚煤规律的研究和煤炭资源预测有一定的参考价值。The sequence stratigraphy is applied to the research of lithofacies paleogeography in the paper. Fourth-order sequence selected as mapping unit, the lithofacies paleogeography maps of Chengde area were made, based on the sequence stratigraphic framework of Permo-Carboniferous. Sedimentary evolution of the area and the relationship between sequence stratigraphy, lithofacies paleogeography, and coal accumulation were studied. It shows that： 1） two third-order sequences, five fourth-order sequences and eight fifth-order sequences are recognized; 2） sea level changes control the development of coal-forming swamps; 3） fourth-order sequence Ⅲ controls the development of two main coal seams. The results will contribute to future research on coal accumulation and coal resources prediction.

关 键 词：层序地层 岩相古地理 石炭-二叠系 聚煤规律 承德地区 

分 类 号：P534.4[天文地球—古生物学与地层学]