Early Ordovician zircon age of a quartz diorite block within accretionary complexes in the Nedamo Belt, Kitakami Massif, NE Japan

The Nedamo Belt in the Kitakami Massif, NE Japan, contains early Carboniferous and Early Triassic accretionary complexes. Tectonic blocks containing plutonic rocks, ultramafic rocks high-P/T schists occur these complexes characterize Belt. comprise hornblende gabbro quartz diorite, they have been identified at more than 50 localities. U-Pb dating of zircon from diorite using inductively coupled plasma-mass spectrometry yields an Ordovician age ca. 480 Ma. Based on similarities lithofacies age, are correlative to Kagura Igneous Rocks one basement units South This correlation may help deducing mechanism (e.g., large sinistral strike-slip fault) emplacement tectonic into