地质科技情报2012，Vol.31Issue(1)：41-46,6.
燕山地区冀北坳陷中元古界杨庄组沉积特征与层序地层
Sedimentary Characteristics and Sequence Stratigraphy of the Mesoproterozoic Yangzhuang Formation,in Jibei Depression of Yanshan Region
摘要
Abstract
MesoproterozoicYangzhuang Formations in Jibei Depression of Yanshan region are mainly a carbonates sedimentary system. Through the cautious observation, measuring, data of indor-slice and the geochemistry analyzation, the author holds that the sedimentary facies of Yangzhuang Formation was carbonate platform facies. It can be furtherly devided into tidal-flat subfacies and 2 micro-phases consists of supratidal, intertidal micro-facies. On the basis of sedimentary facies, combined with sequence characteristics of the interface, the Yangzhuang Formation sequence was studied. Yangzhuang deposition in this area belongs to a shallow continental sea sedimentary environment. Sequence boundaries were mainly indicated by sediments and sedimentary structures of the shallow water environment. Thus the depositional systems tracts belong mainly to transgressive systems tract and highstand systems tract, commonly with the lack of lowstand systems tract or shelf marginal sysrems tract. It does not have the environment for the formation of condense section either, which makes the maximum flooding surface and deep-sea condense section correspondingly. Finally one second-order sequence and three third-order sequences were recognized in Yangzhuang Formation. Rock, structure and characteristics of systems tract of each sequence were described systematically.关键词
杨庄组/沉积相/层序地层/体系域/冀北坳陷Key words
Yangzhuang Formation/sedimentary facies/sequence stratigraphy/systems tract/Jibei Depression分类
地质学引用本文复制引用
吕奇奇,罗顺社..燕山地区冀北坳陷中元古界杨庄组沉积特征与层序地层[J].地质科技情报,2012,31(1):41-46,6.基金项目
中国石油化工股份有限公司海相油气勘探前瞻性项目“燕山地区中新元古界沉积相与层序地层学研究”(YPH08025) （YPH08025）
