U-Pb zircon geochronology of granites and charnockite from southern India: Implications for magmatic pulses associated with plate tectonic cycles within a Precambrian suture zone
The Palghat-Cauvery Suture Zone (PCSZ) in southern India marks the trace along which continental blocks were sutured during the Precambrian. We report here U-Pb geochronological data based on laser ablation ICP mass spectrometry for zircons in two granite plutons and an associated charnockite from within the PCSZ. The weighted mean of206Pb/238U ages for a rapakivi granite from the southern part of the PCSZ yields 819±26Ma (error: 2σ; N=13). On the other hand, a metamorphosed A-type granite and...[Show more]
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