Geochemistry and radiometric dating of a Middle Pleistocene peat
- Univ. of East Anglia, Norwich (United Kingdom)
- Univ. of Leeds (United Kingdom); and others
Uranium, lead, and sulphur data for a Middle Pleistocene interglacial peat deposit from Norfolk, UK, suggest that uptake of these elements was synchronous and confined to a single early diagenetic episode, probably coeval with peat formation. Sulphur isotope data indicate that reducing conditions have been maintained within the deposit throughout its history. Both uranium and lead concentration profiles show a marked discontinuity near the middle of the bed, probably indicating an environmental change, possibly emergence. The lead isotope data are compatible with a single lead component below the discontinuity and two components above. Groundwater is thought to be the dominant source of lead with an additional airfall component present in the upper peat. The uranium and lead concentration profiles below the discontinuity and the sulfur isotope profile throughout the peat support the view that these elements were sequestered from upwelling groundwaters. 35 refs., 9 figs., 3 tabs.
- OSTI ID:
- 617823
- Journal Information:
- Geochimica et Cosmochimica Acta, Vol. 61, Issue 19; Other Information: PBD: Oct 1997
- Country of Publication:
- United States
- Language:
- English
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