[1]曹光杰,张玉兰,李彦彦,等.末次盛冰期长江南京下关-栖霞山段的古河槽[J].山地学报,2011,(02):183.
　CAO Guangjie,ZHANG Yulan,et al.The Paleovalley in XiaguanQixia Mountain of Nanjing Reach of the Yangtze River during the Last Glacial Maximum[J].Mountain Research,2011,(02):183.
点击复制

末次盛冰期长江南京下关-栖霞山段的古河槽()
分享到：

《山地学报》[ISSN:1008-2186/CN:51-1516]

卷:
期数:
2011年02期
页码:
183
栏目:
山地学报
出版日期:
2011-01-01

文章信息/Info

Title:
The Paleovalley in XiaguanQixia Mountain of Nanjing Reach of the Yangtze River during the Last Glacial Maximum
作者:
曹光杰;张玉兰;李彦彦;
1.临沂大学 实验中心，山东 临沂 276005；
2.南京师范大学地理科学学院，江苏 南京 210097
Author(s):
CAO Guangjie; ZHANG Yulan; LI Yanyan
1.Experiment Center, Linyi University, Shandong Linyi 276005，China；
2.School of Geography, Nanjing Normal University, Jiangsu Nanjing 210097，China
关键词:
末次盛冰期; 长江; 古河槽; 地质剖面
Keywords:
the last Glacial Maximum; the Yangtze River; paleovallye; stratigraphical section
分类号:
P512，P931
文献标志码:
A
摘要:
选择长江南京下关-栖霞山段作为研究河段,根据南京长江大桥、四桥附近的地质钻孔资料,运用Mapin-fo软件,绘制南京长江大桥、四桥附近长江古河槽地质剖面示意图。在拟建南京长江四桥附近的6个钻孔采集了年代样品,在-59.33 m深度上河床相圆砾石层中沉积物样品中有机质的14C年代为14 682±110 aBP,据此判断,位于该沉积层下部的上一期沉积旋回应在15 000 aBP之前。结论认为,该研究河段约-65~-90 m的深槽为末次盛冰期时的长江河槽。古河槽相对狭窄陡峭,形成局部深切。槽中充填了一次从粗到细的沉积旋回。
Abstract:
The XiaguanQixia Mountain of Nangjing reach of the Yangtze River was selected as the research reach. Two crosssections of Paleovalley depositional sequence were established with respective of bore data and documents of the No.1 and No.4 Nanjing Yangtze River Bridges and by Mapinfo software. Samples were collected from 6 drilling cores near No.4 Nanjing Yangtze River Bridge which is operational, and 14C ages measured in -59.33 m sedimentary samples from No.1 drilling cores is 14 682±110 aB.P. It is deduced that sedimentary cycle in the lower part of the depth occurred before 15 000 aB.P. Therefore, it is discovered that the time range of paleovalley at a depth of -65～-90 m in XiaguanQixia mountain of Nanjing reach is within the period of LGM . During LGM the deep incisedvalley channel was narrow and the river flew swiftly, and expressed locally and deeply which incised features in Nanjing reach. The sediments of the deep incised valley consist of scree and gravel, gravel sandcoarde sandmedium sand from bottom to top.

相似文献/References:

[1]冯光扬.水文年内不均匀系数的探讨[J].山地学报,1991,(01):27.
[2]李林.长江三峡地区主导产业部门选择[J].山地学报,1992,(02):95.
[3]许炯心.三峡水库修建前长江宜昌-武汉段泥沙输移比及其影响因子[J].山地学报,2008,(01):15.

备注/Memo

备注/Memo:
收稿日期(Received date)：2010-03-10；改回日期(Accepted) : 2010-10-11。
基金项目（Foundation item）：国家自然科学
基金项目（40871010，41072138）；国家重点基础研究发展规划项目（2003CB415201—8）。\[National Natural Science Foundation of China .No.40871010,41072138；National Basic Research Program of China. No.2003CB415201—8.\]
作者简介（Biography）：曹光杰（1964-），男，博士，教授，研究方向长江下游晚第四纪环境演变。\[Cao Guangjie (1964-), Ph.D and Professor, specialized in Late Quaternary environmental evolution in the Yangtze River delta.\] E-mail: guangjiecao@163.com
更新日期/Last Update: 1900-01-01