Sequences and genesis of the Yellow River terraces from Sanmen Gorge to Kouma

Auteur(s) et Affiliation(s)

SU, H.

College of Tourism and Geography Sciences, Yunnan Normal Univ., Kunming, Chine

WANG, J.

College of Resource, Environment and Tourism, Capital Normal Univ., Beijing, Chine

PAN, B.

College of Resource and Environment, Univ., Lanzhou, Chine

MING, Q.

College of Tourism and Geography Sciences, Yunnan Normal Univ., Kunming, Chine

LI, Q.

College of Resource and Environment, Univ., Lanzhou, Chine

Description :
Based on field landscape investigations, thermoluminescence (TL), magnetostratigraphy and loess-paleosol sequence, the AA. found that there are at least 4 Yellow River terraces in Yuxi Fault-Uplift (from Sanmen Gorge to Mengjin) and at least 3 Yellow River terraces in Huabei Fault Depression (from Mengjin to Kouma). All the terraces have a similar structure that several meters of paleosols directly develop on the top of fluvial silt. It shows that the Yellow River incised and consequently abandoned floodplain converted to terrace during the interglacial period. Therefore, there may be a link between the formation of terraces and glacial-interglacial climatic cycles. However, the differences in the Yellow River terrace sequences and ages between Yuxi Fault-Uplift and Huabei Fault Depression indicate that the surface uplift should play an important role in the formation of these terraces.

Type de document :
Article de périodique

Source :
Journal of geographical sciences. Acta geographica sinica, issn : 1009-637X, 2009, vol. 19, n°. 3, p. 351-358, nombre de pages : 8, Références bibliographiques : 1 p.

Date :
2009

Editeur :
Pays édition : Chine

Langue :
Anglais