Genesis of Gibbsite and Palaeoclimatic Conditions Deciphered from O and H Isotopes: A Case Study from Deccan Basalt-Derived Lateritic Residuum, India
Details
Serval ID
serval:BIB_C0E91CDA7C42
Type
Article: article from journal or magazin.
Publication sub-type
Case report (case report): feedback on an observation with a short commentary.
Collection
Publications
Institution
Title
Genesis of Gibbsite and Palaeoclimatic Conditions Deciphered from O and H Isotopes: A Case Study from Deccan Basalt-Derived Lateritic Residuum, India
Journal
International Journal of Earth Sciences and Engineering
ISSN
0974-5904
Publication state
Published
Issued date
06/2016
Peer-reviewed
Oui
Volume
9
Number
3
Pages
918-923
Language
english
Abstract
Stable O and H isotope compositions were measured of pure mineral separates of weathering minerals (gibbsite and kaolinite) from lateritic residuum developed over Deccan basalt in the Kolhapur district, Maharastra. The δ18O (‰, VSMOW) versus δD (‰, VSMOW) values of gibbsite samples range from 2.50 to 7.41 and -50 to -53, respectively, and those for kaolinite samples range from 16.4 to 17.8 and -73 to -77, respectively. Plots of isotope data of gibbsite on a bivariate δ18O versus δD diagram indicate that the analyzed gibbsites are of secondary origin. The calculated values of δ18Owater in equilibrium with gibbsite suggest their formation under intense monsoonal conditions, significantly different from the present day climate of the study area
Keywords
Gibbsite and kaolinite, India, Lateritic residuum, O and H isotopes, Palaeoclimate
Create date
23/04/2022 23:04
Last modification date
06/05/2023 6:49
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