江苏沭阳北部第四纪多重地层特征及环境演变  

Characters and Environmental Evolution of Quaternary Multi-strata in North Shuyang,Jiangsu

作　　者：杜建国[1] 

机构地区：[1]江苏省地质调查研究院,江苏南京210018

出　　处：《江苏地质》2003年第1期19-24,共6页Jiangsu Geology

摘　　要：通过对沭阳北部地区第四纪岩石地层、生物特征、重矿物组合及年代地层等分析成果的研究 ,恢复了该区第四纪岩相古地理环境 ,并对第四纪古地理环境的演变进行了深入分析。Shuyang lies in the northeast of Jiangsu Province,borders Suqian on the west,Huaian on the north,and Liangyungang on the north and east. The study area is located in the north of Shuyang,and also in the northeast margin of Shuyang Basin——a largest sedimentary basin since the middle Cenozoic Era,and stands the south margin of Su Lu Orogenic Belt. The first well site for the Chinese Continental Drilling Project is situated in Maobei town of Donghai County,about three kilometers to the north of the study area. Studies on the multi strata characters in Quaternary period may offer full and accurate fundamental information for the evolution research of Su Lu Orogenic Belt since middle Cenozoic Era. Quaternary system is widely developed in Shuyang area. Based on the information of neo tectonic movement properties,geomorphic features,petrology, lithofacies,origin,paleoclimate,isotopic dating of the sediments,the Quaternay strata in the study area can be divided into two grand units:hilly land in the northwest and plain area in the southeast bordering along Maowei Yingping Jiangzhuang. Through the studies of litho strata,life form characteristics and heavy mineral composition as well as the results from the analysis of chronostratigraphy in Quaternary period,its environment of lithofacies and paleogeography is renewed and further analysis on its evolution is conducted.

关 键 词：第四纪 古地理环境 江苏 岩石地层 生物特征 年代地层 

分 类 号：P534.63[天文地球—第四纪地质学]