Search Results - "Chapecó"

Zircon U–Pb geochronology from the Paraná bimodal volcanic province support abrief eruptive cycle at ~135 Ma by Pinto, V., Hartmann, L., Santos, J., McNaughton, Neal, Wildner, W.

“…Ion microprobe U–Pb isotopic data on zircons from the Paraná magmatic province are presented from one tholeiitic (high-Ti Pitanga type) and three felsic volcanic rocks from the low-Ti Palmas and high-Ti Chapecó types. Igneous zircons from the four volcanic rocks yield volcanism ages within error: i.e. 134.4 ± 1.1 Ma (basalt), 134.6 ± 1.4 Ma (rhyodacite), 134.8 ± 1.4 (quartz latite) and 135.6 ± 1.8 Ma (quartz latite). …”
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