The Tam Ky-Phuoc Son Shear Zone in central Vietnam: Tectonic and metallogenic implications

Where was the Ailaoshan Ocean and when did it open: A perspective based on detrital zircon U–Pb age and Hf isotope evidence

“…Besides, ca. 400-470 Ma (UPb zircon) granitoids and high-grade metamorphic rocks have also reported in the central Vietnam (Nagy et al, 2001;Tran and Nguyen, 2006;Tran et al, 2014). In addition, most of the 400-500 Ma zircons in this study have subhedral morphology (Fig.…”

Zircon U–Pb ages and geochemistry of granitoids in the Truong Son terrane, Vietnam: Tectonic and metallogenic implications

“…The Truong Son terrane (previously known as Annamitic Chain), located in central Vietnam and northeastern Laos, is one of the most important tectonic and metallogenic terranes in Indochina block. It presents a NW-SE trending elongated fold belt, and extends from the northern Song Ma Suture, which defines the boundary between the Indochina and South China block (Lepvrier et al, 1997(Lepvrier et al, , 2004(Lepvrier et al, , 2008Hoa et al, 2008;Liu et al, 2012;Roger et al, 2014), to the southern Tamky-Phuoc Son -Xepon (Laos) Suture, which marks the boundary with the Kontum terrane (Tran, 1979;Gatinsky and Hutchison, 1987;Nam, 1998;Lepvrier et al, 2004;Tran et al, 2014).…”

Detrital zircon U–Pb geochronology, Lu–Hf isotopes and REE geochemistry constrains on the provenance and tectonic setting of Indochina Block in the Paleozoic

“…The northern boundary of the Truong Son Belt is the Song Ma suture which can be considered as the boundary between the South China and Indochina blocks (Metcalfe, 1996;Hoa et al, 2008;Lepvrier et al, 2008;Liu et al, 2012). Nearly E-W trending fault zone (Tam Ky-Phuoc Son) separates the Truong Son Belt from the Kontum Massif to the south (Lepvrier et al, 2004;Tran et al, 2014). Truong Son Belt is dominated by a system of subparallel northwesttrending strike-slip faults (Fig.…”

“…Early Paleozoic to Mesozoic magmatic rocks are widely distributed within the Truong Son Belt were emplaced during Ordovician-Silurian (470-420 Ma), late Carboniferous-early Permian (300-280 Ma), late Permian to middle Triassic (270-245 Ma) and middle-late Triassic (245-200 Ma) (Carter et al, 2001;Hoa et al, 2008;Usuki et al, 2009;Tran et al, 2014;Shi et al, 2015).…”

“…4), suggestive of a short transportation from the local source region. Coeval granitic rocks in the Truong Son Belt and adjacent areas yield zircon ages ranging from 460 to 400 Ma (Carter et al, 2001;Usuki et al, 2009;Tran et al, 2014;Shi et al, 2015), and were likely the source of the detritus. In addition, the range of ages in our samples yielded εHf(t) values of − 11.83 to +11.15 with model ages between 674 Ma and 1847 Ma (Appendix A), suggesting that they were derived from reworking of Mesoproterozoic crust (1200-1850 Ma) and some juvenile crustal materials older than 670 Ma.…”