IMHE OpenIR  > 成都山地所知识仓储(2009年以前)
渡口地区桐子林组沉积环境
Alternative TitleTHE DEPOSITIONAL ENVIRONMENT OF TONGZILIN FORMATION IN DUKOU REGION
赵永涛; 陈富斌
Corresponding Author赵永涛
1986
Source Publication山地研究
Volume4Issue:2Pages:131-135
Abstract二十世纪四十年代,常隆庆把渡口地区高出江面310米以下的堆积物统称为昔格达组,时代属早更新世或属于上新世。 现经实地地貌分析、岩相对比、C14年代测定、沉积物分析和孢粉分析后,从中可划分出桐子林组。 在渡口地区,桐子林组分布于金沙江、雅砻江两岸,高出江面40米以下,系一套砂砾层夹灰色粉砂质粘土层,厚23.0-70.0米,构成第Ⅱ级阶地,时代属晚更新世晚期一全新世早期。
本文作者剖析了桐子林组的地层特征、沉积环境的演变。
Other AbstractTongzilin Formation which is located the convergence of Yalong River and Jinsha River in Dukou Region is fluviatile-lake facies state which is loose deposit. It was formed in conditions of warm-humid climate. The time of Formation is determined in upper Late Pleistocene to Early Holocene.The evolution of Yalong River and Jinsha River can be divided three stages in the region, which are the undercutting stage in the middle Late Pleistocene (23,000 year BP. age) and the sediment stage at the fluviatile-lake facies form upper Late Plitocene to Early Holocene (23,000 - 10,000 year BP.) and the undercutting stage since the middle Holocene (10,000 year BP ).Two undercutting stages of the rivers correspond with two tectonic motions. It shows that the development of the river were controlled by neotectonism. At present, it is going on undercutting and it may be in the begenning of the undercutting stage. It shows also that recent climate is drier than the climate in the upper Late Pleistocene. 
Keyword渡口 粉砂质粘土 砂砾层 沉积环境 晚更新世晚期 级阶 金沙江 冲积层 昔格达组 全新世
Language中文
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/7120
Collection成都山地所知识仓储(2009年以前)
Corresponding Author赵永涛
Recommended Citation
GB/T 7714
赵永涛,陈富斌. 渡口地区桐子林组沉积环境[J]. 山地研究,1986,4(2):131-135.
APA 赵永涛,&陈富斌.(1986).渡口地区桐子林组沉积环境.山地研究,4(2),131-135.
MLA 赵永涛,et al."渡口地区桐子林组沉积环境".山地研究 4.2(1986):131-135.
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