Details of Award
NERC Reference : NE/B503741/1
Weathering inputs in Himalayan flood plains and the oceanic Sr flux from Himalayan rivers.
Grant Award
- Principal Investigator:
- Professor MJ Bickle, University of Cambridge, Earth Sciences
- Co-Investigator:
- Dr A Galy, University of Cambridge, Earth Sciences
- Co-Investigator:
- Professor NB Harris, The Open University, Faculty of Sci, Tech, Eng & Maths (STEM)
- Grant held at:
- University of Cambridge, Earth Sciences
- Science Area:
- Earth
- Overall Classification:
- Earth
- ENRIs:
- Global Change
- Science Topics:
- Earth Surface Processes
- Soil science
- Climate & Climate Change
- Abstract:
- This proposal is to determine the sources of Sr which contribute to the high Sr and 87Sr fluxes carried by the Ganges and Brahmaputra rivers by quantifying the flood plain processes that dominate the weathering outputs. These rivers make a substantial contribution to the present rapid increase in seawater 87Sr/86Sr ratios which initiated at 40 Ma, most plausibly as a consequence of exhumation of the Himalayan-Tibetan orogen. However the relative importance of a high Sr flux versus high 87Sr/86Sr ratios of the input and the partition between carbonate and silicate sources is controversial. This debate is critical to interpretation of the well defined Phanerozoic seawater Sr-isotope curve because if high 87Sr/86Sr ratio carbonate sources dominate the inputs, then collisional orogens may moderate seawater Sr-isotope variation with no climatic implications. If significant changes in silicate Sr fluxes are implied, then the positive excursions in seawater 87Sr/86Sr ratios might be associated with increased silicate weathering, implying increased solid-Earth CO2 degassing.
- NERC Reference:
- NE/B503741/1
- Grant Stage:
- Completed
- Scheme:
- Standard Grants Pre FEC
- Grant Status:
- Closed
- Programme:
- Standard Grant
This grant award has a total value of £196,205
FDAB - Financial Details (Award breakdown by headings)
| Total - Staff | Total - T&S | Total - Other Costs | Total - Indirect Costs | Total - Equipment |
|---|---|---|---|---|
| £84,550 | £13,335 | £29,232 | £38,892 | £30,198 |
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