| Popis: |
1989). The results range from 10 to 16Ma, which suggest that the igneous activities of theAshizuri complex were generally coeval with those of theOuter Zone Granitic Rocks. Relatively large scatter in thereported age, however, obscures the strict temporal rela-tionship between the magmatism of Ashizuri complex andthose of the Outer Zone Granitic Rocks.We report U–Pb ages of the zircons separated fromtwo felsic samples of the Ashizuri complex using laserablation ICP mass spectrometry (LA-ICP-MS) to clarifythe timing of this peculiar magmatism. Implications tothe origin of the alkaline magmatism in the forearc re-gion will also be discussed. |
