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GEOREF RECORD

Glauconitization processes in the northwestern Mediterranean, Gulf of Lions

P. Giresse, A. Wiewiora and D. Grabska
Glauconitization processes in the northwestern Mediterranean, Gulf of Lions
Clay Minerals (March 2004) 39 (1): 57-73

Abstract

Two sedimentary profiles, at 18 km and at 125 km from the Rhone River mouth were selected to study the steps of glauconitization inside green (glaucony) grains, in a temperate marine environment. The proximal site is characterized by a greater content of alpine minerals (chlorite, illite) than the distal one. In the proximal site, pellets at a younger level demonstrate a largely inherited mineral composition. In the older level, representing the most advanced stage of glauconitization, there is a mixed-layer glauconite-nontronite (G-N) phase with 20% glauconite-80% nontronite in dark green grains. In the distal site, more evolved glaucony has up to 92% glauconite in the G-N. In spite of this difference, the glauconitization process developed similarly in the two sites. The relatively low Fe content in the mud-matrix does not reflect the concentration of this element inside the grains. During diagenesis, most of the inherited minerals disappear, making way for neoformed mixed-layer glauconite-nontronite.


ISSN: 0009-8558
EISSN: 1471-8030
Coden: CLMIAF
Serial Title: Clay Minerals
Serial Volume: 39
Serial Issue: 1
Title: Glauconitization processes in the northwestern Mediterranean, Gulf of Lions
Affiliation: Universite de Perpignan, Laboratoire d'Etude des Geo-Environnements Marins, Perpignan, France
Pages: 57-73
Published: 200403
Text Language: English
Publisher: Mineralogical Society, London, United Kingdom
References: 25
Accession Number: 2004-068902
Categories: Sedimentary petrology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, sketch map
N42°00'00" - N43°34'60", E03°04'60" - E06°10'00"
N30°00'00" - N47°30'00", W05°00'00" - E38°00'00"
N43°19'60" - N46°34'00", E04°34'60" - E08°22'00"
Secondary Affiliation: Polish Academy of Sciences, POL, Poland
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute.
Update Code: 200420
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