Abstract
The development of silica diagenesis at Site 397 is predetermined by the original distribution of silica-contributing components. Opaline skeleton (upwelling conditions) favor the formation of clinoptilolite and opal-CT; volcanogenic components favor the precipitation of authigenic phillipsite and montmorillonite. The latter two minerals in Pliocene ash layers are the result of rapid diagenetic processes occurring at c.300m burial depth. A sudden increase of diagenesis is marked by intensive calcite cementation at c.700m, coinciding with the first occurrences of clinoptilolite and opal-CT lepispheres and the transformation of amorphous siliceous skeletons into crystallized opal-CT. -from Author
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CITATION STYLE
Riech, V. (1979). Diagenesis of silica, zeolites and phyllosilicates at ( DSDP) sites 397 and 398. Initial Reports of the Deep Sea Drilling Project, Leg 47, Las Palmas, Canary Islands to Vigo, Spain, 1976, (Scripps Institution of Oceanography; UK Distributors, IPOD Committee, NERC, Swindon), 741–759. https://doi.org/10.2973/dsdp.proc.47-1.137.1979
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