Open AccessCretaceous Granitic Magmatism in South-Central Vietnam: Constraints from Zircon U–Pb Geochronology
Author(s) -
Huu Hiep NGUYEN,
Nhu Sang PHAM,
Van Long HOANG,
Andrew Carter,
Vinh Hau BUI,
Hoang Bac Bui,
Thanh Trung TRINH,
Lam Anh NGUYEN
Publication year - 2021
Publication title -
inżynieria mineralna
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.215
H-Index - 9
ISSN - 1640-4920
DOI - 10.29227/im-2021-02-01
Subject(s) - zircon , geochronology , geology , magmatism , geochemistry , cretaceous , basement , proterozoic , granitic rock , pluton , carboniferous , petrology , paleontology , archaeology , structural basin , history , tectonics
South-central Vietnam abundantly presents magmatic rocks with larger volumes ofCretaceous granitic rocks. In this study, zircon U–Pb geochronology of granite samples from the Deoca,Ankroet, and Dinhquan complexes in south-central Vietnam are utilized to investigate Cretaceousgranitic magmatism. According to U–Pb analysis results, zircon ages of granitic rocks display the Deocaat ~113–92 Ma, the Ankroet at ~103–98 Ma, and the Dinhquan at ~97–113 Ma. The range of ages isnarrow from 113 to 92 Ma, with most common ages date at ~100 Ma. Published data and our resultsdisplay that Cretaceous granitic magmatism was active between ~87–118 Ma and most active at ~100Ma in south-central Vietnam. Additionally, the Deoca and Dinhquan complexes show inherited ages inTriassic followed by Proterozoic and Carboniferous to Ordovician. The obtained ages indicate that Itypegranitic rocks could be derived from melting of basement rocks. Our study suggests that I-typegranitic rocks in south-central Vietnam were significantly intruded around 100 Ma.