Strontium isotopes as tracers of ecosystem processes: theory and methods
作者： Rosemary C. Capo , Brian W. Stewart , Oliver A. Chadwick
DOI: 10.1016/S0016-7061(97)00102-X
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摘要: Abstract The strontium (Sr) isotope method can be a powerful tool in studies of chemical weathering and soil genesis, cation provenance mobility, the chronostratigraphic correlation marine sediments. It is sensitive geochemical tracer, applicable to large-scale ecosystem as well centimeter-scaled examination mobility within profile. 87Sr/86Sr ratios natural materials reflect sources available during their formation. Isotopically distinct inputs from precipitation, dryfall, parent material, surface or groundwater allow determination relative proportions those entering leaving an ecosystem. isotopic compositions labile (soil exchange complex solution) Sr vegetation cations plants. Strontium isotopes used track biogeochemical cycling nutrient such calcium. extent contributions situ external additions dust rain also resolved with this method. In paper, we review geochemistry systematics strontium, discuss use tracer earth processes.
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