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The Changbai (or Baitoushan, Paektu) volcano on the China/North Korea border is best known for its climactic caldera-forming eruption of 100km3 of comendite materials 1000years (1ka) ago. The polygenetic Changbai volcano also erupted moderate-volume pre-caldera comendite lava at ~4ka and small-volume post-caldera trachyte ignimbrite at ~0.3ka. Here we report 238U–230Th disequilibrium ages of zircons...
The rare occurrences of active volcanoes on the Tibetan Plateau provide a unique opportunity to investigate time scales of magma chamber processes for post-collisional potassic volcanism. This research utilizes high-spatial resolution U–Th disequilibrium dating methods to date zircons from the active Dayingshan volcano, Tengchong, SE Tibetan Plateau, which erupted last during the Holocene. Zircon...
206 Pb/ 238 U ages obtained from Secondary Ionization Mass Spectrometry (SIMS) analyses of zircon crystals in eight ignimbrites from Cerro Galán (Central Andes) reveal insights into magma dynamics and crystallization histories of a sustained (>3.5Ma), large-volume, crystal-rich magmatic system. This makes the Galán volcanic system an excellent example of repeated large-volume ignimbrite...
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