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岩石学报 2008
Zircon SHRIMP U-Pb dating of diorite among Jicha serpentine and Eza grabbro from Lancangjiang belt, Yunnan Province and its geological significance
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Abstract:
The Baijixun mafic-uhramafic rocks are belong to Lancangjiang ophiolite belt,and are composed of rock mass and tectonic rock slice,and can be divided into the Jicha serpentine and the Eza grabbro.Dated using the ziron SHRIMP U-Pb,the magmatic age of the Jicha serpentine is over 297Ma and the Eza grabbro is 303Ma,and the Jinshajiang ophiolite (300-294Ma)is formed in same the time.This indicates the Baijixun mafic-ultramafic rocks and Jinshajiang ophiolite were from ocean crust relic,which were formed in same...
