摘要
通过对长江三角洲(江苏)地区第四系早更新世、中更新世、晚更新世、全新世各时期岩相古地理演化特征并结合岩相沉积分布及剖面图纵横向展布规律的分析,将整个研究区划分为三大沉积单元9个沉积分区,即黄淮流域堆积区(Ⅰ):里下河湖沼积平原区(Ⅰ);长江三角洲堆积区(Ⅱ):新长江三角洲堆积平原区(Ⅱ_1)、常州—无锡高亢平原区(Ⅱ_2),太湖东岸湖沼积平原区(Ⅱ_3—苏州重点城市区)、东部沿海冲海积低平原区(Ⅱ_4);低山丘陵堆积区(Ⅲ):浦口—大仪低山丘陵区(Ⅲ_1)、南京—宜兴低山丘陵区(Ⅲ_2)、江阴南部环太湖丘陵区(Ⅲ_3)、镇江低山丘陵区(Ⅲ_4),阐述了9个沉积分区的划分依据和第四系沉积特征。
This study of the Yangtze River Delta region (Jiangsu) Quaternary Period, covering the late Pleistocene, early Pleistocene, middle Pleistocene, and Holocene epochs, reviews the lithofacies paleogeographic evolution characteristics of each period. Using the lithologic deposit distributions and proifles of the vertical and horizontal distribution characteristics, the Yangtze River Delta region is divided into three sedimentary units with nine partitions:the Huanghuai basin accumulation zone (I), consisting of the Lixia River limnetic product plains (I); the Yangtze River Delta accumulation zone (II), including the new Yangtze Delta accumulation plain (II1), the Changzhou-Wuxi high plains (II2), the east coast of Taihu Lake limnetic product plains (II3, Suzhou key city area), and the eastern coastal sea product low plain (II4); and the mountain foothil s accumulation zone (III), covering the Pukou-Dayi low hil y land (III1), the Nanjing-Yixing low hil y land (III2), the ring Taihu lake hillside area in southern Jiangyin (III3), and the Zhenjiang low hilly land (III4). In this study, the basis for the nine sedimentary zones and the Quaternary sedimentary features are introduced in detail.
出处
《上海国土资源》
2016年第2期51-56,64,共7页
Shanghai Land & Resources
基金
中国地质调查局地质调查项目"长江三角洲重点地区三维地质调查"(1212011220252)
关键词
长江三角洲
第四系
沉积特征
沉积单元
沉积分区
the Yangtze river delta
Quaternary strata
sedimentary characteristics
sedimentary unit
sedimentary partition
