Cosmogenic 32Si as a tracer of biogenic silica burial and diagenesis: Major deltaic sinks in the silica cycle

Measurements of natural cosmogenic 32Si (t1/2 ~ 140 years) in tropical deltaic sediments demonstrate for the first time that most 32Si is present in rapidly formed authigenic clays and not biogenic opaline silica (bSi). The burial of bSi in deltaic and continental margin sediments has likely been gr...

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