A ground-water mixing model for the origin of the Imini manganese deposit (Cretaceous) of Morocco.

E. R. Force, W. Back, E. C. Spiker, L. P. Knauth

Research output: Contribution to journalArticle

23 Scopus citations

Abstract

Three beds of manganese oxide ore in a 10 m-thick dolomite unit are associated with diagenetic features, and, are accordingly also diagenetic in their present aspect. Whether primary or introduced, the Mn mineralogy is attributed to reactions between fresh and saline ground-waters as the zone of mixing passed through the dolomite unit during a period of falling sea-level. The succession of diagenetic changes is: 1) precursor carbonates, 2) dolomite-janggunite, 3) hollandite-pyrolusite-chert-calcite.-G.J.N.

Original languageEnglish (US)
Pages (from-to)65-79
Number of pages15
JournalEconomic Geology
Volume81
Issue number1
DOIs
StatePublished - Jan 1 1986

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ASJC Scopus subject areas

  • Geophysics
  • Geology
  • Geochemistry and Petrology
  • Economic Geology

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