2006•Acta Geoscientica SinicaRequires access

Sm-Nd Isochron Age of Zedang Ophiolite in Tibet and Its Significance

Wei Dongliang

Abstract

Zedang ophiolite is located in the eastern segment of Yalung Zangbo ophiolite belt, Tibet. The whole rock Sm-Nd isochron age of basalts in Zedang ophiolite is 175±20 Ma, indicating that the ophiolite was formed in the Middle Jurassic. The initial e_ Nd (t) value of basalt is +7.2, suggesting that the Zedang ophiolite was derived from a strongly depleted mantle and did not suffer from crustal contamination.

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Key concepts: Ophiolite, Isochron, Geochemistry, Geology, Basalt, Mantle (geology), Paleontology, Tectonics