When did substantial clastic input from the Himalaya commence?
Lancaster Environment Centre, Lancaster University, Lancaster, U.K.
PhD in Earth Sciences, University of California Santa Cruz
My background is broad, crossing many disciplines in geology that are ranging from classical fields in sedimentology & stratigraphy, to analytical methods in isotopic and molecular analysis on organic compounds, stable carbon and oxygen isotopes, and Sm-Nd geochemistry, and to geochronology and low-temperature thermochronology. My current work is aimed to answer two questions in Himalayan-Tibetan tectonics. First, when the significant clastic input from the Himalayas commenced still remains elusive, yet critical to understanding the early erosion history and the crustal deformation in the Himalayas during the collision. The second question is when the river capture of the upper Indus occurred. The river capture of Indus, with its rapid erosion and excavation at a deep gorge, has been suggested as a triggering mechanism responsible for the development of the Nanga Parbat Western Syntaxis. Despite active research, no consensus has been reached in term to the timing and mode of the capture.
The thick Cenozoic sedimentary sequence in Katawaz basin, Pakistan, was interpreted to have been derived from the Himalayan orogenesis and represent a long, continuous record of a deltaic-fluvial system, analogous to the modern Indus River. We are applying an integrated approach, including double-dating analysis (U-Pb & fission track analysis), Sm-Nd geochemistry, 40Ar/39Ar thermochronology, and heavy mineral analysis, to characterize those rocks. Also, we propose to do a comparison study in basins within the Sulaiman fold-thrust belt for fully understanding how the Indus evolved through time and the space. This study will be the first high-resolution study of understanding the spatial-temporal evolution of the Paleo-Indus system.