Geochemistry and geochronology of the Troodos ophiolite: An SSZ ophiolite generated by subduction initiation and an extended episode of ridge subduction?
S. Osozawa et al., Dept. of Earth Sciences, Graduate School of Science, Tohoku University, Sendai, 980-8578, Japan. Posted online 14 Nov. 2012; http://dx.doi.org/10.1130/L205.1.
Soichi Osozawa and colleagues present new trace-element, radiogenic isotopic, and geochronologic data from the Troodos ophiolite, along with a large body of previously published data, that give new insight into the tectonic history of this storied ophiolite. The data also demonstrate the variability of suprasubduction-zone ophiolites, as well as differences between them and commonly used modern analogs. Post-analysis, Osozawa and colleagues propose that Troodos was formed over a newly formed subduction zone, similar to many proposed models, and that the extended period of magmatism (boninitic) resulted from a prolonged period of ridge subduction.
Cold and old: The rock record of subduction initiation beneath a continental margin, Calabria, southern Italy
D. Shimabukuro et al., University of California, Dept. of Earth and Planetary Science, Berkeley, CA 94720-4767, USA. Posted online 14 Nov. 2012; http://dx.doi.org/10.1130/L222.1.
David Shimabukuro and colleagues present data from northern Calabria, southern
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