洛河大荔人遗址段的地貌学研究
The Geomorphologic Character in Dali Man Site and the Development of Luohe
-
摘要: 通过对大荔人遗址地层地貌的观察与实测,发现洛河大荔人遗址段的地层主要由3套陆相沉积物组成:底部的新近纪和早更新世湖相堆积,中部中更新世的河相堆积以及上部中更新世晚期至全新世的黄土堆积.在洛河大荔人遗址段可以识别出四级阶地,从河流地貌特点和各级阶地的地层特征看,该阶地皆为基座型阶地.运用古土壤断代法和区域河流阶地发生对比法得出洛河在该地区演化的时间序列:0.9～0.72MaB.P.、0.50～0.40MaB.P.、0.10MaB.P.、0.01MaB.P.在此基础上对该地区地貌演化模式进行了讨论.Abstract: Dali Man site,Dali Man site section has been divided into three large sedimentary facies layers from the top to the bottom by this study,which are:loess paleosol sequence,fluvial deposit and lacustrine sediments And,four terraces have been discovered in this section.The age of T2,T3 and T4 can be dated 0.15 Ma.B.P,0.5～0.4 Ma.B.P and 0.9～0.72 Ma.B.P respectively by the ages of the paleosols covered on them.The cosmparative research of river terraces in the area of the middle reaches of Yellow River indicates the terraces are most likely to form in some stages,such as 0.01 Ma.B.P.,0.15 Ma.B.P.,0.6～0.5 Ma.B.P.,1.2 Ma.B.P.,1.5 Ma.B.P..The age of T1 can be dated 0.01 Ma.B.P.by terrace comparison.According to loess sequence covered on terraces,the authors put forward a new model on the forming of terraces in the area of middle reaches of Yellow River:The uplifting of Tibet Plateau enhances the global cool down,both the uplifting of Tibet Plateau and global cool down had positive feedback on the reducing of the base level of erosion.
-
Key words:
- geomorphology /
- terrace /
- evolvement /
- Dali Man Site
-
-
王永焱,薛祥煦,岳乐平,等.陕西大荔人化石的发现及其初步研究[J].科学通报,1979.(7):303-306.
王永焱,薛祥煦,赵聚发,等.大荔人化石的发现及初步研究[J].西北大学学报(自然科学版),1979,(3):83-99.
吴新智,尤玉柱.大荔人遗址的初步观察[J].古脊椎动物与古人类,1979,17(4):294-303.
孙建中,赵景波.中国黄土高原第四纪[M].北京:科学出版社.1991.144-150.
尹功名,赵华,卢演俦,等.大荔人化石层位上限年龄的地质学证据[J].第四纪研究,1999,(1).
陈铁梅,原思训,高世君.铀子系法测定骨化石的可靠性及华北地区主要旧石器地点的铀子系年代序列[J].人类学学报,1984,3(3):256-269.
岳乐平,薛祥煦.中国黄土古地磁学[M].北京:地质出版社,1996,64-70.
熊尚发,丁仲礼,刘东生.北京地区河流阶地的发育时代[A].见:刘嘉麒,袁宝印主编“中国第四纪地质与环境——庆贺刘东生院士八十华诞暨从事地质工作五十五周年文集”[C].北京:海洋出版社,1997,221-227.
朱照宇.黄土高原及邻区新构造与新构造运动[J].第四纪研究,1992,(3):252-263.
朱照宇.黄河中游阶地的形成与水系演化[J].地理学报,1989,44(4):429-439.
潘保田,李吉均,曹继秀.黄河中游的地貌与地文期问题[J].兰州大学学报(自然科学版),1994,30(1):115-123.
李吉均,康建成.中国第四纪冰期、地文期和黄土记录[J].第四纪研究,19 89,(3):269-277.
程绍平,邓起东,闵伟,等.黄河晋陕峡谷河流阶地和鄂尔多斯高原第四纪构造运动[J].第四纪研究,1998,(3):238-248.
薛祥煦,于学峰,李永项.大荔人遗址地层的再研究[J].地层学杂志,2000,24(3):210-214.
丁仲礼,余志伟,刘东生.中国黄土研究新进展(Ⅲ)时间标尺[J].第四纪研究,1991,(4):336-347.
Porter S C,An Z and Zheng H.Cyclic Quaternary alluviation and terraci ng in a nonglaciated drainage basin on the north flank of the Qinling Shan,central China[J].Quaternary Research,1992,38:157-169.
潘保田,李吉均.青藏高原:全球变化的驱动机与放大器——Ⅲ青藏高原隆起对气候变化的影响[J].兰州大学学报(自然科学版),1996,32(1):108-115.
-
计量
- 文章访问数: 2419
- PDF下载数: 3027
- 施引文献: 0
下载: