2017年度日本地球化学会奨励賞受賞記念論文
地球表層の主要陽イオンと炭酸塩の物質循環
2018 年 52 巻 3 号 p. 131-142
詳細
2018 年 52 巻 3 号 p. 131-142
Major cations (Na, Mg, K and Ca) are essential for life and play a major role in the global geochemical cycles. Dissolved cations in terrestrial waters derive from both silicate and carbonate rocks, and rivers and groundwater deliver them to the ocean, where there is a steady-state balance between inputs and outputs over geological time. Calcium carbonates are central components in understanding the chemical budgets of major cations for modern and past oceans. Biogenic CaCO3 is an important tool for elucidating the oceanic chemical evolution and past climate changes. Recent advances in mass spectroscopy techniques have made it possible to explore the stable isotope system of Mg, Ca, K and Sr in geologic materials, each of which are novel indicator for constraining the interplay of natural systems in the geological past; continental weathering, carbonate budgets, mid-ocean ridge spreading rates, etc.
