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Tectonic constraints to Cretaceous magmatic arc deduced from detrital heavy minerals in northeastern Japan – evidence from detrital garnets, tourmalines and chromian spinels
2014
Cretaceous research (Print)
North Kitakami Terrane origin, and detrital tourmalines are considered to have 32 been derived mainly from meta-sedimentary rocks. The composition of detrital 33 chromian spinels are compositionally diverse and mainly derived from tholeiitic 34 and intra-plate basalts showing high TiO2 (>about 1.0 wt%) and island arc 35 basalts with moderately low TiO2 (1.0> TiO2 >0.5 wt%) and high -Cr#. Latter 36 chromian spinels can be considered as a record of island arc activity including 37 high
doi:10.1016/j.cretres.2013.11.004
fatcat:p2y2br6cjzcqrc7tphaeysgy4e