Boron isotopes in DSDP cherts: Fractionation and diagenesis
作者： R Eganhouse , M Goldhaber , K Peters
DOI: 10.1016/S1873-9881(04)80003-8
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摘要: … the first leading to opal-A and involving a large fractionation of B isotopes between tetrahedral boron in solution and opal-A, the second and third resulting in quartz via opal-CT. The dissolution–reprecipitation occurred at variable temperatures and water/rock ratios. The deepest cherts underwent diagenesis at higher temperature (low d18O values) and in closed system (low d11B values). Boron isotopic composition of marine cherts cannot be a clue to the paleochemistry (specifically paleo-pH) of seawater but indicates that some …
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