Details of Award
NERC Reference : NER/A/S/2001/01099
Dislocations and the chemical reactivity of feldspars.
Grant Award
- Principal Investigator:
- Professor I Parsons, University of Edinburgh, Sch of Geosciences
- Grant held at:
- University of Edinburgh, Sch of Geosciences
- Science Area:
- Terrestrial
- Earth
- Overall Classification:
- Earth
- ENRIs:
- Pollution and Waste
- Natural Resource Management
- Global Change
- Biodiversity
- Science Topics:
- Earth Surface Processes
- Earth Resources
- Sediment/Sedimentary Processes
- Properties Of Earth Materials
- Abstract:
- Feldspars are unusually reactive at temperatures below 500 degrees C. They equilibrate rapidly with aqueous fluids in the upper crust and decompose quickly during weathering and surface transport. They have low closure T for 18 O and 40Ar exchange. These geochemical features result from complex intracrystal microtextures. Most important are edge dislocations at interfaces of perthitic and antiperthitic lamellae. These allow water into crystals causing recrystallization to microporous/micropermeable coarse perthite. Weathering is rapid because of formation of etch pits on dislocations. Etch pit honeycombs perhaps acted as sites for the origin of life. I propose to study the distribution and morphology of these dislocations, their t-T evolution and geochemical implications for fluid-rock reactions, weathering, diagenesis, 18O exchange and 38Ar/40Ar dating and 'thermochronology'.
- NERC Reference:
- NER/A/S/2001/01099
- Grant Stage:
- Completed
- Scheme:
- Standard Grants Pre FEC
- Grant Status:
- Closed
- Programme:
- Standard Grant
This grant award has a total value of £62,268
FDAB - Financial Details (Award breakdown by headings)
| Total - Staff | Total - T&S | Total - Other Costs | Total - Indirect Costs |
|---|---|---|---|
| £8,229 | £8,711 | £41,540 | £3,785 |
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