We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Stages of late Paleozoic to early Mesozoic magmatism in the Song Ma belt, NW Vietnam: evidence from zircon U-Pb geochronology and Hf isotope composition.
- Authors
Hieu, Pham; Li, Shuang-Qing; Yu, Yang; Thanh, Ngo; Dung, Le; Tu, Vu; Siebel, Wolfgang; Chen, Fukun
- Abstract
The Song Ma zone in NW Vietnam bears important tectonic implications as a potential subduction corridor between the Indochina and South China blocks. On the basis of U-Pb ages, the Hf isotopic characteristics of zircons and the geochemical composition of granitoids, a two-stage magmatic evolution process of the Song Ma zone at ~290-260 and ~245-230 Ma can be proposed. Isotopic analyses indicate magmatic contributions from Neoproterozoic oceanic island basalt, Proterozoic continental crust, and depleted mantle or juvenile lithosphere. By combining geochronological and geochemical data from the granitoid rocks, we suggest that the staged magmatic processes of Song Ma zone may be related to a long-lasting period of ocean subduction (ca. 290-260 Ma) and subsequent syn-/post-collisional evolution (ca. 245-230 Ma).
- Subjects
PALEOZOIC Era; MAGMATISM; ZIRCON; URANIUM-lead dating; GEOLOGICAL time scales; MERCURY isotopes
- Publication
International Journal of Earth Sciences, 2017, Vol 106, Issue 3, p855
- ISSN
1437-3254
- Publication type
Article
- DOI
10.1007/s00531-016-1337-9