Initial Reports of the Deep Sea Drilling Project 1987
DOI: 10.2973/dsdp.proc.95.118.1987
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Silica Diagenesis in Continental Slope and Rise Sediments off Eastern North America (Sites 603 and 605, Leg 93; Sites 612 and 613, Leg 95)

Abstract: Eocene to Cretaceous siliceous sediments of four Deep Sea Drilling Project sites on the continental margin off eastern North America (Sites 603, 605-Leg 93; Sites 612, 613-Leg 95) were analyzed for their major geochemical and mineralogical composition. Under different environmental conditions (burial depth, in situ temperature, host-rock fades) of the upper slope to lower rise, conversion of biogenous opal-A to opal-CT took place in biosiliceous chalks and marls older than early middle Eocene. Dense sampling r… Show more

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Cited by 17 publications
(29 citation statements)
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“…The occurrence of high biogenic silica contents in the Labrador Sea during Eocene time corresponds well with other studies of opal accumulation in the North Atlantic (e.g., Riech and von Rad, 1979;Fenner, 1981;Ehrmann and Thiede, 1985;Thein and von Rad, 1987). The production of biogenic opal reached a maximum during (late) early and (early) middle Eocene around 52 Ma (Riech and von Rad, 1979;Boersma et al, 1987).…”
Section: Paleoceanographic Implications: Estimates Of Productivity Frsupporting
confidence: 71%
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“…The occurrence of high biogenic silica contents in the Labrador Sea during Eocene time corresponds well with other studies of opal accumulation in the North Atlantic (e.g., Riech and von Rad, 1979;Fenner, 1981;Ehrmann and Thiede, 1985;Thein and von Rad, 1987). The production of biogenic opal reached a maximum during (late) early and (early) middle Eocene around 52 Ma (Riech and von Rad, 1979;Boersma et al, 1987).…”
Section: Paleoceanographic Implications: Estimates Of Productivity Frsupporting
confidence: 71%
“…The result was strong dissolution of siliceous parti-cles. Zeolite precipitation (clinoptilolite) was also found in Core 105-647A-13R; the silicon could be derived from dissolved opal (see Fenner, 1981;Stein, 1985;Thein and von Rad, 1987).…”
Section: Influence Of Diagenesis On the Distribution Of Biogenic Opalmentioning
confidence: 99%
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