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

Shi, Meifeng; Lin, Fuchang; Wu, Fan; Deng, Qi; Cong, Feng; Tran, My-Dung; Zhu, Hongtao; Wang, Hong

doi:10.1016/j.jseaes.2015.02.001

Cited by 98 publications

(98 citation statements)

References 46 publications

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“…Apart from the derivation from the recycling sediments (e.g., the Paleozoic and Triassic sequences in both South China and Indochina blocks), the Grenville‐aged intrusive and volcanic rocks (e.g., the ~972 Ma Jingnan rhyolites and 970–890 Ma Shuangxiwu Group volcanic rocks, tonalites and granodiorites; X. H. Li, Li, et al, ; Shu et al, ; Ye et al, ) and Neoproterozoic igneous rocks (706–871 Ma; Dong et al, , ; Huang et al, ; Li et al, ; Li, ; Lin et al, ; Pei et al, ; Zhao & Zhou, ; Zhao et al, ; Zhao et al, ; Zhou & Yan, ; M. F. Zhou, Ma, et al, ) in South China may also contribute some 1000–900 and 850–700 Ma detrital zircon grains from the studied Late Triassic sandstones. Similarly, Early Paleozoic igneous and metamorphic rocks in South China Block (e.g., 457–410 Ma granites and gneiss in Wuyi‐Yunkai Orogeny) and Indochina Block (e.g., 452–447 Ma gneiss in central Vietnam) are likely to be sources for those 500–400 Ma detrital zircon grains according to their partly euhedral to subhedral shapes (R. Liu et al, ; Shi et al, ; Usuki et al, ; Wang et al, , ; Yao et al, ).…”

Section: Discussionmentioning

confidence: 99%

When Did the Paleotethys Ailaoshan Ocean Close: New Insights From Detrital Zircon U‐Pb age and Hf Isotopes

Xia

Lai

et al. 2019

Tectonics

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We present new laser ablation (LA)‐multicollector‐inductively coupled plasma mass spectrometry detrital zircon U‐Pb age and Hf isotope data of the Triassic sedimentary rocks from the eastern and western sides of the Ailaoshan suture in SW China, which separate the Indochina and South China blocks. Detrital zircon grains of the Lower‐Middle Triassic sequences from western South China show single age population of 280–237 Ma (peak at 254–251 Ma) with mainly positive εHf(t) values (+0.15 to +9.11, ~60%). The Middle Triassic samples from eastern Indochina also contain single age population of 273–236 Ma (peak at 246–242 Ma), but with mainly negative εHf(t) values (−18.95 to −1.83, ~88%). The unimodal detrital zircon age pattern and Hf isotope features suggest that the Permian‐Triassic magmatic arcs had supplied detritus for the Lower‐Middle Triassic sequences on both sides of the Ailaoshan suture. In contrast, the Upper Triassic sequences on the either side of the suture display similar polymodal age populations at 290–230, 500–400, 850–700, 1000–900, 2000–1800, and 2600–2400 Ma. This indicates a dramatic change in detrital provenance across the Middle‐Late Triassic boundary. We interpret this change to be resulted from the closure of the Paleotethyan Ailaoshan Ocean in the early Late Triassic. The ocean closure and consequent Indochina‐South China continent‐continent collision may have connected the drainage systems of the two blocks, leading to the marked similarities in their post‐Middle Triassic sedimentary provenance.

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Section: Discussionmentioning

confidence: 99%

When Did the Paleotethys Ailaoshan Ocean Close: New Insights From Detrital Zircon U‐Pb age and Hf Isotopes

Xia

Lai

et al. 2019

Tectonics

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“…Age data of detrital zircon grains are derived from the Red River drainage basin [ Clift et al ., ; van Hoang et al ., ], the western and northeastern tributaries of the Pearl River drainage basin [ Xu et al ., ; Zhao et al ., ], respectively. Age data for Central Vietnam are from bedrocks like sandstones, gneisses, and granitoids [ Carter et al ., ; Usuki et al ., ; Liu et al ., ; Burrett et al ., ; Tran et al ., ; Shi et al ., ]. Age data for Hainan Island are from river mouth sediments [ Xu et al ., ; Cao et al ., ; Wang et al ., ].…”

Section: Age Signatures Of Potential Source Areasmentioning

confidence: 99%

Detrital zircon provenance of the Paleogene syn‐rift sediments in the northern South China Sea

Shao

Cao

Pang

et al. 2016

Geochem Geophys Geosyst

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The early rift sedimentation history of the South China Sea is still not well understood due to restricted borehole coverage of the Paleogene strata and lack of reliable stratigraphic dating. We use detrital zircon U‐Pb geochronology to explore the source‐to‐sink characteristics of syn‐rift sequences in the northern South China Sea. The results reveal significant intrabasinal provenances in addition to the well‐perceived terrigenous supply from the north. The Dongsha Uplift is considered to account for the dominance of the Early Cretaceous zircons in the Eocene samples. The Lower Oligocene sediments in the Qiongdongnan Basin could have been sourced from Hainan Island and local uplifts, but their distinction cannot be confirmed by the U‐Pb age spectra. Contemporary sediments in the northern Pearl River Mouth Basin were most likely transported from southeastern South China with well‐rounded zircon grains showing U‐Pb age similarity to those from the northeastern tributaries of the Pearl River. By contrast, intrabasinal sources from the west and east are suggested to have contributed the infill of the southern part of the Pearl River Mouth Basin based on generally euhedral zircon shapes. These sedimentary source patterns appear to change very little in the Oligocene northern South China Sea. However, the newly detected Neoproterozoic zircons in the Upper Oligocene sediments from borehole L21 tend to indicate a southern source. The episodic and diachronic nature of rifting and erosion processes in the early South China Sea is the cause of complex patterns in the Paleogene provenance history.

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“…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).…”

Section: Geological Settingmentioning

confidence: 99%

“…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.…”

Section: Source Of Detrital Zirconsmentioning

confidence: 99%

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

et al. 2016

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

Cited by 98 publications

References 46 publications

When Did the Paleotethys Ailaoshan Ocean Close: New Insights From Detrital Zircon U‐Pb age and Hf Isotopes

When Did the Paleotethys Ailaoshan Ocean Close: New Insights From Detrital Zircon U‐Pb age and Hf Isotopes

Detrital zircon provenance of the Paleogene syn‐rift sediments in the northern South China Sea

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

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