渡口地区桐子林组沉积环境
文献类型:期刊论文
作者 | 赵永涛 ; 陈富斌 |
刊名 | 山地研究
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出版日期 | 1986 |
卷号 | 4期号:2页码:131-135 |
关键词 | 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 |
其他题名 | THE DEPOSITIONAL ENVIRONMENT OF TONGZILIN FORMATION IN DUKOU REGION |
通讯作者 | 赵永涛 |
中文摘要 | 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。 |
英文摘要 | Tongzilin 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. |
语种 | 中文 |
公开日期 | 2014-08-20 |
源URL | [http://ir.imde.ac.cn/handle/131551/7120] ![]() |
专题 | 成都山地灾害与环境研究所_成都山地所知识仓储(2009年以前) |
推荐引用方式 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. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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