赣北上二叠统多重地层划分研究  

A STUDY ON MULTI-STRATIGRAPHIC CLASSIFICATION OF THE UPPER PERMIAN OF NORTHERN JIANGXI

作　　者：覃兆松 

机构地区：[1]江西省地质调查院,江西南昌330201

出　　处：《江西地质》2000年第4期241-250,共10页Jiangxi Geology

摘　　要：在开展赣西1∶5万区调中 ,对上石炭统至下侏罗统开展了岩石地层、层序地层、生物地层、生态地层、年代地层及旋回地层和同位素地层研究 ,本文即是部分成果的总结。依据岩石特征 ,将赣北上二叠统分为6个岩石地层区 ,并创竹亭组代表其深水相沉积。依据七宝山、枣木两剖面资料 ,进行了生物地层、生态地层及年代地层划分 ,提出长兴阶顶界位于青龙组底部、底界位于长兴组下部的结论 ,并对吴家坪阶底界的优选点进行了探讨。通过生态地层研究 ,将晚二叠世划分为小规模海水进退、大规模海水进退、相对稳定及小幅度高频率海水进退4个发展阶段。In a regional geological survey in Western Jiangxi on a scale of 1:50,000, a multidisciplinary study has been carried out incorporating lithostratigraphy, sequence stratigraphy, biostratigraphy, ecostratigraphy, chronostratigraphy, cyclo-stratigraphy and isotope stratigraphy on strata from the Upper Carboniferous to the Lower Jurassic. This paper is a summary of part of the results. Based on lithologic features, the Upper Permian of Northern Jiangxi is divisible into six lithostratigraphic regions, and a Zhuting Formation is newly established to represent its deep-water deposit. From a biostratigraphic, ecostratigraphic and chronostratigraphic classification of the strata on the Qibaoshan and Zaomu cross-sections, the author believes that the top boundary of Changxing Stage lies in the bottom part of the Qinglong Formation, while its bottom boundary occurs in the lower part of the Changxing Formation. At the same time, the most probable position of the bottom boundary of Wujiaping Stage is also discussed in this paper. Through ecostratigraphic study, the Late Permian is divided into small-scale transgression-regression, large-scale transgression-regression, relative quiescence and small-magnitude high-frequency transgression-regression stages of development.

关 键 词：多重地层 生物地层序列 二叠纪 江西 生态地层 

分 类 号：P534.46[天文地球—古生物学与地层学] Q911.6[天文地球—地质学]