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A new index was proposed for the carbonate precipitation rate observed for quickly growing travertines in hydrothermal settings, where degassing of carbon dioxide from high-pCO_2 water is the principa...l process that induces CaCO_3 precipitation. The travertine precipitation rate hardly fits to previous surface-controlled equations that often inverse with pCO_2 . Mathematical model in this study relates the precipitation rate with the CO_2 degassing rate by assuming a stable degree of supersaturation（Ω）. Here, the accelerating force by CO_2 degassing and the inhibiting force by carbonate precipitation are conceptually balanced to sustain a site-specific Ω value. The precipitation rate equals the product of the newly proposed index for degassing-induced carbonate precipitation（IDP） and an undefined hydrodynamic factor. The IDP, which can be calculated from the bulk water chemistry, is proportional to the pCO_2 excess of water from atmosphere, with secondary influence from pH and ionic strength.続きを見る
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１.はじめに ２.炭素は沈み，反応し，やがて沸き上がる ３.溶けていた炭素の一部は地表で気相と固相になる ４.飽和に関わる２つの力が釣合う ５.代数操作から導き出されるもの ６.Ωeq が持つ意味 ７.PWP-rate は本当に成立しないのか
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Mendeley出力
