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长江三角洲(江南)地区第四纪海侵层的划分及时代归属
DIVISION AND AGE ASSIGNMENT OF THE QUATERNARY TRANSGRESSION LAYERS IN THE YANGTZE DELTA AREA (SOUTHERN YANGTZE)
【摘要】 依据多年积累的钻孔剖面、微体生物化石、孢子花粉、古地磁和14C测年等资料综合分析研究,本区第四系有5个主要海侵层,从老到新为第Ⅴ海侵层(宝山海侵)、第Ⅳ海侵层(嘉定海侵)、第Ⅲ海侵层(昆山海侵)和第Ⅱ海侵层(氵鬲湖海侵)、第Ⅰ海侵层(镇江海侵),其时代分别为早更新亚世中期(1.8—2.0Ma B.P.)、中更新亚世早期(0.78—0.45Ma B.P.)、晚更新亚世早期(126—70Ka B.P.)、晚更新亚世晚期(40—20Ka B.P.)、全新世(始于10Ka B.P.)。
【Abstract】 Based on the study and analysis of the accumulated data on drilling section, spore-pollen analysis, microfossil, palaeomagnetic and ()14C dating, the Quaternary System of the Yangtze delta area is contained five transgression, that is, from old to new: the 5th transgression layer (Baoshan transgression), the 4th transgression layer (Jiading transgression), the 3rd transgression layer (Kunshan transgression), the 2nd transgression layer (Gehu transgression), The 1st transgression layer (Zhenjiang transgression). Their ages are respectively middle early Pleistocene Subepoch (1.8—2.0 Ma B.P.), early middle Pleistocene Subepoch (0.78—0.45 Ma B.P.), early late Pleistocene subepoch (126—70 Ka B.P.), late late Pleistocene Subepoch (40—20 Ka B.P.) and Holocene epoch (beginning at 10 Ka B.P.).
【Key words】 Yangtze delta area; Quaternary; transgression layers; division; geologic age;
- 【文献出处】 地层学杂志 ,Journal of Stratigraphy , 编辑部邮箱 ,2005年S1期
- 【分类号】P534.63
- 【被引频次】30
- 【下载频次】449