Open AccessThe LA-ICP-MS U-Pb zircon age of rhyolite from the Dong Trau formation and its geological significances
Author(s) -
Hieu T. Pham
Publication year - 2018
Publication title -
khoa học và công nghệ: tự nhiên
Language(s) - English
Resource type - Journals
ISSN - 2588-106X
DOI - 10.32508/stdjns.v1it5.560
Subject(s) - rhyolite , protolith , zircon , biotite , geology , geochemistry , volcanic rock , paleontology , volcano , quartz
Zircons separated from an rhyolite sample in the Dong Trau formation, in the southern of Hà Tĩnh province were dated to determine the protolith age for the complex. Sixteen LA-ICP-MS U-Pb zircon analyses give concordant ages concentrated at 256 Ma (weighted mean). These results indicate the protolith age of the rhyolite (primary magma crystallization age). The value of this age are close to the analytical results pf the whole rock by Rb-Sr method and biotite Rb-Sr method. Therefore the crystallization age of the rhyolite from the Đồng Trầu formation corresponded period late Permian to early Triassic.