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Geological Society, London, Special Publications; 1999; v. 162; p. 183-200;
DOI: 10.1144/GSL.SP.1999.162.01.15
© 1999 Geological Society of London

Asia

Preliminary observations on the geomorphic evolution of the Guide Basin, Qinghai Province, China: implications for the uplift of the northeast margin of the Tibetan Plateau

P. A. Fothergill1

1 Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK

H. Ma

Centre for Quaternary Research, Department of Geography, Royal Holloway, University of London, TW20 0EX, UK

Landform development in the Guide Basin has been influenced by the late Tertiary and Quaternary tectonic evolution of northeast Tibet. In the south of the Guide Basin, the remnants of three palaeosurfaces are preserved on top of flat-topped landforms. The two highest palaeosurfaces are separated by faults, which are thought to be extensional. Normal faulting may have begun in the middle-late Pleistocene, possibly indicating that the Guide Basin had reached its maximum elevation by this time. Yellow River drainage development within the Guide Basin may also have occurred in middle-late Pleistocene times, following the onset of extensional faulting.