太湖平原苏州渡村第四纪沉积及其形成环境

【摘要】 根据对太湖平原苏州渡村1125号钻孔总厚为153米的第四系古地磁测年结果,其底界年令为距今80万年左右。各项粒度参数及其递变规律研究表明,该沉积以河湖相地层为主。矿物组分与孢粉组合分析结果,共划分出八个环境演化阶段,其中有三次较为寒冷时期。更多还原

【Abstract】 Verified by the test to the samplings from a depth of 153m at No. 1125 boring well, the age of the subsurface layer at Du-Cun, Suznou, Jiangsu Province is around 800.000 years old, The granutarity parameter and the pattern of its progressive change illustrate that the sediment is mostly fluviolacustrine facies. An analysis of the mineral and sporo-Pollen compositions indicates 8 stages of environmental evolution, 3 of which comparatively colder.更多还原