New evidence for ~4.45Ga terrestrial crust from zircon xenocrysts in Ordovician ignimbrite in the North Qinling Orogenic Belt, China

New evidence for ~4.45Ga terrestrial crust from zircon xenocrysts in Ordovician ignimbrite in the North Qinling Orogenic Belt, China

Evidence for the earliest known terrestrial crust comes predominantly from Jack Hills in Western Australia, where hafnium isotopic results from >3.8. Ga detrital zircons indicate crustal precursors as old as ~4.4-4.5. Ga. We present evidence from magmatic cores in >3.9. Ga xenocrystic zircons...

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Bibliographic Details
Main Authors: Diwu, C., Sun, Y., Wilde, Simon, Wang, H., Dong, Z., Zhang, H., Wang, Q.
Format: Journal Article
Published: Elsevier Science BV 2013
Subjects:
Hadean
Ancient crustal recycling
Zircon Hf model ages
Early Earth
Online Access:http://hdl.handle.net/20.500.11937/24679

Internet

http://hdl.handle.net/20.500.11937/24679

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