Origin of upper Cretaceous multicolored claystones of the western Atlantic.

M. A. Arthur

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

Cores show that U.Cretaceous sediments directly overlying the black shale facies are generally 'red' or 'multicolored' clay. These non-calcareous U.Cenomanian to L.Maestrichtian (?) claystones, which contain no fossils, probably represent slow deposition under well-oxygenated-conditions and a high CCD. It is not necessary to assume a volcanogenic source for the metals and minerals assemblages within these multi-colored claystones. Diagenertic mobilisation of redox-sensitive metals within anoxic pore waters of the L.Cretaceous black shales and upward diffusion-advection into the oxidised claystones can account for the varible Fe-MN enrichment observed. -from Author

Original languageEnglish (US)
Pages (from-to)417-420
Number of pages4
JournalUnknown Journal
StatePublished - Jan 1 1979

Fingerprint

claystone
Cretaceous
black shale
metal
Maastrichtian
mobilization
porewater
advection
fossil
clay
mineral
sediment

All Science Journal Classification (ASJC) codes

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

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Origin of upper Cretaceous multicolored claystones of the western Atlantic. / Arthur, M. A.

In: Unknown Journal, 01.01.1979, p. 417-420.

Research output: Contribution to journalArticle

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T1 - Origin of upper Cretaceous multicolored claystones of the western Atlantic.

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N2 - Cores show that U.Cretaceous sediments directly overlying the black shale facies are generally 'red' or 'multicolored' clay. These non-calcareous U.Cenomanian to L.Maestrichtian (?) claystones, which contain no fossils, probably represent slow deposition under well-oxygenated-conditions and a high CCD. It is not necessary to assume a volcanogenic source for the metals and minerals assemblages within these multi-colored claystones. Diagenertic mobilisation of redox-sensitive metals within anoxic pore waters of the L.Cretaceous black shales and upward diffusion-advection into the oxidised claystones can account for the varible Fe-MN enrichment observed. -from Author

AB - Cores show that U.Cretaceous sediments directly overlying the black shale facies are generally 'red' or 'multicolored' clay. These non-calcareous U.Cenomanian to L.Maestrichtian (?) claystones, which contain no fossils, probably represent slow deposition under well-oxygenated-conditions and a high CCD. It is not necessary to assume a volcanogenic source for the metals and minerals assemblages within these multi-colored claystones. Diagenertic mobilisation of redox-sensitive metals within anoxic pore waters of the L.Cretaceous black shales and upward diffusion-advection into the oxidised claystones can account for the varible Fe-MN enrichment observed. -from Author

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