Substrate control on formation and maturation of glauconites in the Middle Eocene Harudi Formation, western Kutch, India

Substrate control on formation and maturation of glauconites in the Middle Eocene Harudi Formation, western Kutch, India

Formation and maturation of glauconites within the early Middle Eocene Harudi Formation, built up in a lagoon to shelf transition in western Kutch, India is addressed taking recourse to a combined sedimentological, micropalaeontological and mineralogical investigation. The glauconite is authigenic a...

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Veröffentlicht in:Marine and petroleum geology 2012-02, Vol.30 (1), p.144-160
Hauptverfasser: Banerjee, Santanu, Chattoraj, Shovan Lal, Saraswati, P.K., Dasgupta, Somnath, Sarkar, Urbashi
Format: Artikel
Sprache:eng
Schlagworte:
Aluminum
Authigenic glauconite
Cerium anomaly
Crude oil
Decay
Dissolution
Earth sciences
Earth, ocean, space
Exact sciences and technology
Foraminifera
Hydrocarbons
Infillings
Marine
Marine geology
Maturation
Maturity
Ostracoda
Pellets
Porosity
Sedimentary rocks
Smectites
Stratigraphy
Sub-oxic micro-environments
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Zusammenfassung:Formation and maturation of glauconites within the early Middle Eocene Harudi Formation, built up in a lagoon to shelf transition in western Kutch, India is addressed taking recourse to a combined sedimentological, micropalaeontological and mineralogical investigation. The glauconite is authigenic and its occurrence coincides with maximum flooding. The glauconite is more matured within the fecal pellets and is less matured within the intra-particle pores of bioclasts namely, foraminifera, ostracoda, gastropoda and bryozoa. SEM-EDS, XRD and geochemical studies clearly document that the infilling within the intra-particle pores of bioclasts belong to nascent to slightly evolved glauconite (
ISSN:0264-8172
1873-4073
DOI:10.1016/j.marpetgeo.2011.10.008