地理学报 ›› 1986, Vol. 53 ›› Issue (1): 23-31.doi: 10.11821/xb198601003

• 论文 • 上一篇    下一篇

太湖成因的新认识

陈月秋   

  1. 中国科学院南京地理研究所
  • 出版日期:1986-01-15 发布日期:1986-01-15

A NEW IDEA ABOUT THE FORMATION OF TAI-HU LAKE

Chen Yueqiu   

  1. Nanjing Institute of Geography, Academia Sinica
  • Online:1986-01-15 Published:1986-01-15

摘要: 太湖的成因,一直是地学界人士关注的问题之一。目前,在各种教材中都以传统说法——太湖是泻湖。对此,本人进行了多年的调查研究,总结了许多事实,都不能说明太湖是泻湖。

关键词: 太湖地区, 太湖成因, 上海地区, 昆山县, 新认识, 古海岸线, 全新世中期, 泻湖, 古遗址, 大海侵

Abstract: The article explains that the district of Tai-hu Lake hadn’t undergone transgression in the past six thousand years and it was not formed from lagoon environment.1. By the analysis of trace-element in the peat bed of 6000 yr Bp., it is considered that the farthest boundary of the transgression in Tai-hu Lake district in the Holocene, is on the east side of the shell ridge formed 5680?80 years ago.2. The deposits of the middle Holocene dated by 14C show that they are neither marine-deposits nor lagoon deposits, but continental ones. Their depth is generally 3 or 5 meters under earth surface.3. The discovery of ruins and relics of the past seven thousand years proves that Tai-hu Lake district was already a land by that time and has never experienced transgression. The ancient culture layer 11 m thick is practically a continuous layer for seven thousand years. It strongly proves the Tai-hu Lake district had not experienced any transgression since the last seven thousand years.The auther concludes that Tai-hu Lake wasn ’t a lagoon, but a tectonic lake, formed by block of river courses by neotectonic movement.