Fe‐Illites in A Proterozoic Deep Marine Slope Deposit in the Penganga Group of the Pranhita Godavari Valley: Their Origin and Environmental Significance

Ferric illite (Fe‐illite) developed extensively in a siliciclastic submarine fan sequence within a lime‐mud succession in the Proterozoic Penganga Group at Adilabad, South India. The minerals formed asde novoby preferentially replacing high‐K minerals like alkali feldspar and mica. It is composition...

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Bibliographic Details
Published in:The Journal of geology 1998-11, Vol.106 (6), p.741-750
Main Authors: Deb, Sarbani Patranabis, Fukuoka, Masato
Format: Article
Language:English
Subjects:
Chemical composition
Feldspars
Gasoline
Geology
Illite
Limestones
Marine
Mica
Minerals
Sandstones
Shales
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Summary:Ferric illite (Fe‐illite) developed extensively in a siliciclastic submarine fan sequence within a lime‐mud succession in the Proterozoic Penganga Group at Adilabad, South India. The minerals formed asde novoby preferentially replacing high‐K minerals like alkali feldspar and mica. It is compositionally intermediate between glauconite and illite in a continuously varying chemical spectrum. The mineral exhibits an R1 or R3 type stacking sequence, with low (
ISSN:0022-1376
1537-5269
DOI:10.1086/516057