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research article
Zircon U-PbSHRIMP dating of the Yematan batholith in Dulan, North Qaidam, NW China
The Yematan batholith crops out over 120 km(2) in the North Qaidam ultrahigh pressure (UHP) metamorphic belt. It consists of granodiorite, monzogranite and biotite granite and forms an irregular intrusion into Neoproterozoic gneiss that has undergone Caledonian UHP metamorphism. Zircons from the Yematan granodiorite yield a SHRIMP U-Pb age of 397+/-3 Ma. These granitic rocks have geochemical characteristics intermediate between I- and S-type granites, and are post-collisional. We suggest that the Yematan granitic rocks were formed during the last exhumation event of the North Qaidam UHP belt.
Type
research article
Web of Science ID
WOS:000224549400012
Authors
Publication date
2004
Published in
Volume
49
Start page
1736
End page
1740
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
May 15, 2012
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