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Green clays from the Lower Oligocene of Aardebrug, Belgium: a re-evaluation

Published online by Cambridge University Press:  09 July 2018

J.M. Huggett ,
B. Laenen  and
N. Vandenberghe
J.M. Huggett
Affiliation:
Department of Geology, Royal School of Mines, Imperial College of Science Technology and Medicine, Prince Consort Rd, London, SW7 2BP, UK
B. Laenen
Affiliation:
Katholieke Universitiet Leuven, Afdeling Historische Geologie, Redingenstraat 16 - 3000, Leuven, Belgium
N. Vandenberghe
Affiliation:
Katholieke Universitiet Leuven, Afdeling Historische Geologie, Redingenstraat 16 - 3000, Leuven, Belgium
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Extract

Porrenga (1968) described the green clays from the Lower Oligocene of Aardebrug, east of Leuven (Louvain) in Belgium as glauconitic illite, a mineral intermediate in chemistry between glauconite and illite, and presumed this clay to be neoformed, though the mode of origin is not discussed. Notably, most of the section from which Porrenga obtained his sample of 'glauconitic illite' is nonmarine. Non-marine glauconites are rare in the literature and there is no standard terminology. Parry and Reeves (1966) reported green pellets of 10 Å clay from recent sediments at Lake Mound, Texas, but with no detrital green clay as source and an authigenic origin is assumed. Green clays described as Fe-rich mica occur in lacustrine environments in the Oligocene of Cantal (Jung, 1954), and the Massif Central (Gabis, 1963) in France. These deposits are derived from altered crystalline basement.

Type
Note
Information
Clay Minerals , Volume 31 , Issue 4 , December 1996 , pp. 557 - 562
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 1996

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