Downloads
Abstract
Zircon crystals selected from granitoid Chieng Khuong Complex V0938 sample and V0821 have the LA-ICP-MS U-Pb analyses clustered at 263±8 Ma. Two sample zircon analyses give concordant ages concentrated at 263± 8 Ma (weighted mean). These results indicate the protolith of the granitoid Chieng Khuong Complex (primary magma crystallization age) to be late Paleozoic (ca. 263 Ma). The results Hf(t) of Chieng Khuong granitoid show that Hf isotopic ratio from -6.4 to-13.3, indicated granitoid was formed in a complicated environment and origin through partial melting of Proterozoic crust. Combine with Hf isotope and petrological probably indicating existence of the mixture between crust and mantle material during the formation of the magma. Thus, these rusults indicate the mixing crust – mantle model which is the main way to forming process of Chieng Khuong complex.
Issue: Vol 17 No 2 (2014)
Page No.: 67-81
Published: Jun 30, 2014
Section: Natural Sciences - Research article
DOI: https://doi.org/10.32508/stdj.v17i2.1316
Download PDF = 708 times
Total = 708 times
Most read articles by the same author(s)
- Hieu Trung Pham, The discovery adakitic rock along the Phan Si Pan zone in northwestern Vietnam and Cu-Au-Mo mineralization , Science and Technology Development Journal: Vol 16 No 2 (2013)
- Hieu Trung Pham, 278 Ma U-Pb zircon age of metagranite in Bo Xinh complex area of song Ma structural zone and its significances , Science and Technology Development Journal: Vol 17 No 4 (2014)