Component variation in the late Neoproterozoic to Cambrian sedimentary rocks of SW China - NE Vietnam, and its tectonic significance

Numerous Pan-African (600-500 Ma) detrital zircons and the diagnostic age spectra of detrital zircons in the early Paleozoic sedimentary rocks indicate that the SCB was located at the northern margin of East Gondwana during the early Paleozoic. The dramatic change in the clastic components from the late Neoproterozoic to Cambrian sedimentary rocks suggests that the NSC area was probably affected by the Pan-African orogeny.