Petrogenesis of the 1.85 Ga Sonakhan mafic dyke swarm, Bastar Craton, India

Title
Petrogenesis of the 1.85 Ga Sonakhan mafic dyke swarm, Bastar Craton, India
Author(s)
Dr. S.D. Deshmukh
Issue Date
24-09-2020
Citation
-
Document Abstract
The NNW trending tholeiitic Sonakhan mafic dyke swarm of the Northern Bastar Craton is comprised of basalt to basaltic andesite (SiO2 = 46.3 wt% to 55.3 wt%; Mg# = 37 to 70) dykes. A single basaltic dyke yielded a weighted-mean 207Pb/2°6Pb baddeleyite age of 1851.1 ± 2.6 Ma. The Sr and Nd isotopes (87Sr/s6Sr, = 0.70396 to 0.70855; ski(t) = —5.7 to +2.0) am variable which is a consequence of crustal contamination. Trace element modeling suggests the dykes were likely derived by partial melting of a spinel-bearing mantle source.
Language
English
Document Year
2018
Subject Name
Geology
Publisher Name
Elsevier
Rights :
All rights given to AUTHOR