Vivit, D V

5 items:

Si cycling in a marine chronosequence demonstrated by pore-water Ge/Si ratios Categories: Publication; Types: Citation
Solute profiles in soils, weathering gradients and exchange equilibrium/disequilibrium The spatial and temporal changes in hydrology and pore water elemental and 87/86Sr compositions were used to determine contemporary weathering rates in a 65 to 226 ky old soil chronosequence formed from granitic sediments deposited on marine terraces along coastal California. Cl-corrected Na, K and Si increased with depth denoting inputs from the weathering of plagioclase and K-feldspar. Solute 87/86Sr exhibited progressive mixing of sea water-dominated precipitation with inputs from less radiogenic plagioclase. Linear approximations to these weathering gradients were used to determine plagioclase weathering rates of between 0.38 and 8.9 × 10−15 moles m−2 s−1. The lack of corresponding weathering gradients for Ca... Categories: Publication; Types: Citation
Calcium stable isotope evidence for three soil calcium pools at a granitoid chrono-sequence Categories: Publication; Types: Citation
Solute profiles in soils, weathering gradients and exchange equilibrium/disequilibrium The spatial and temporal changes in hydrology and pore water elemental and 87/86Sr compositions were used to determine contemporary weathering rates in a 65 to 226 ky old soil chronosequence formed from granitic sediments deposited on marine terraces along coastal California. Cl-corrected Na, K and Si increased with depth denoting inputs from the weathering of plagioclase and K-feldspar. Solute 87/86Sr exhibited progressive mixing of sea water-dominated precipitation with inputs from less radiogenic plagioclase. Linear approximations to these weathering gradients were used to determine plagioclase weathering rates of between 0.38 and 8.9 × 10−15 moles m−2 s−1. The lack of corresponding weathering gradients for Ca... Categories: Publication; Types: Citation
Geochemistry and evolution of pedogenic Fe nodules in a marine terrace chronosequence Categories: Publication; Types: Citation

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