ISSN:
1432-0967
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
Notes:
Abstract The material studied consists of samples of marine oolitic iron ore of the main-seam horizon of the Dogger Beta, Kleiner Johannes mine, near Pegnitz, Oberfranken. The main iron base of the ore comprizes goethite (α-FeOOH) oolites containing also Al2O3, SiO2 and about 1 percent Ti and P. The Ti is fixed mainly in the oolite cores, P2 in the outer shells. Electron probe analysis of individual oolites shows (1) correlated distribution of Ca and P; (2) that the innermost shells surrounding the core are enriched in Ca phosphate and in isomorphously substituted rare-earth elements. It seems that prior to growth of goethite shells the phosphatic shells were also formed in a marine environment.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00398894
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