Ca. 2.5 Ga TTG rocks in the western Alxa Block and their implications
Abstract
The Alxa Block is considered part of the North China Craton, but the unambiguous Archean basement has not been reported. In this study, we present the first evidence of the Neoarchean rocks in the Beidashan area of the western Alxa Block. The petrographic and geochemical data show that these rocks are granodiorite with TTG (tonalite-trondhjemite-granodiorite) characteristics. Zircon U-Pb dating gave an age of 2522±30 Ma for the magmatic core and...
Paper Details
Title
Ca. 2.5 Ga TTG rocks in the western Alxa Block and their implications
Published Date
Jul 10, 2012
Journal
Volume
57
Issue
31
Pages
4064 - 4076
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