Stephan Mueller Special Publication Series www.stephan-mueller-spec-publ-ser.net 1868-4556 1868-4564 4 Geology, geophysics and tectonics of Northeastern Russia: a tribute to Leonid Parfenov 2009 10.5194/smsps-4-289-2009 http://www.stephan-mueller-spec-publ-ser.net/4/289/2009/ http://www.stephan-mueller-spec-publ-ser.net/4/289/2009/smsps-4-289-2009.html http://www.stephan-mueller-spec-publ-ser.net/4/289/2009/smsps-4-289-2009.pdf 289 311 2009-09-17 Comparison of Cretaceous granitoids of the Chaun tectonic zone to those of the Taigonos Peninsula, NE Asia: rock chemistry, composition of rock forming minerals, and conditions of formation P. L. Tikhomirov M. V. Luchitskaya luchitskaya@ginras.ru I. R. Kravchenko-Berezhnoy Moscow State University, Moscow, Russia Geological Institute, Russian Academy of Sciences, Moscow, Russia The Cretaceous granitoid complexes of the Eastern Taigonos and the Prybrezhny Taigonos belts (southern part of the Taigonos Peninsula), Tanyurer pluton of the Okhotsk-Chukotka volcanic belt, and the Peekiney, Moltykan, and Telekay plutons of the Chaun tectonic zone are discussed in relation to their structural position, petrography, rock and mineral chemistry and physicochemical conditions of melt crystallization. These granitoid plutons were generated through melting of a compositionally heterogeneous crustal source, with direct contribution from mafic melts produced in the mantle wedge above active or extinct Benioff zones. Variations of the trace-element composition of granitoids are controlled to a greater extent by local compositional peculiarities of the source regions than by the geodynamic regime as such. 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