Significance of Sm-Nd isotope systematics in crustal genesis: A case study of Archaean metabasalts of the eastern Dharwar Craton |
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| Authors: | J K Zachariah S Balakrishnan V Rajamani |
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| Institution: | (1) National Geophysical Research Institute, 500 007 Hyderabad;(2) Department of Earth Sciences, University of Roorkee, 247 667 Roorkee;(3) School of Environmental Sciences, Jawaharlal Nehru University, 110 067 New Delhi |
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| Abstract: | Determination of the age of rocks by whole rock Sm-Nd isochron method has several limitations imposed by petrogenetic processes.
If the age of the rocks can be determined by other independent methods, the Sm-Nd system provides a wealth of information
to understand crustal genesis. Sm-Nd isotopic studies of metabasaltic rocks of the Archaean Kolar and Ramagiri Schist belts
in the eastern Dharwar Craton indicate that the system was disturbed by postmagmatic fluid alteration processes associated
with terrane accretion. |
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| Keywords: | Sm-Nd isotope Archaean metabasalt eastern Dharwar Craton |
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