Origin of the Tongbai-Dabie-Sulu Neoproterozoic low-d18O igneous province, east-central China
Zircons from 71 diverse rocks from the Qinling-Tongbai-Dabie-Sulu orogenic belt in east-central China and, for comparison, eight from adjoining areas in the South China and North China blocks, have been analyzed for in situ 18O/16O ratio and/or U-Pb age to further constrain the spatial distribution and genesis of Neoproterozoic low-δ18O magmas, that is, δ18O(zircon) ≤4 ‰ VSMOW. In many metaigneous rock samples from Tongbai-Dabie-Sulu, including high-pressure and ultrahigh-pressure eclogites and...[Show more]
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|Source:||Contributions to Mineralogy and Petrology|
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