Neoproterozoic deposition and Triassic metamorphism of metasedimentary rocks in the Nam Co Complex, Song Ma Suture Zone, NW Vietnam

Hau, Bui Vinh; Kim, Yoonsup; Thanh, Ngo Xuan; Hai, Tran Thanh; Yi, Keewook

doi:10.1007/s12303-018-0026-z

Cited by 16 publications

(14 citation statements)

References 82 publications

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“…The U -Pb isotopic compositions of zircon were plotted in the Tera -Wasserburg concordia and probability distribution diagrams (Figure . 3). Similar to the three metasandstone samples in Nam Co Complex reported by Hau et al, 2018, LA -MC -ICP -MS zircon age data from samples SM14 and SM20 show the major zircon age peak at ~800÷980 Ma and less important peaks at ~1600 Ma, ~1850 Ma and ~2500 Ma (Figure 4). The median 206 Pb/ 238 U ages of Neoproterozoic zircon population in two samples SM14 and SM20 were calculated as 855±20 Ma (2σ) and 940±16 Ma (2σ), respectively (Figures 4a, c).…”

Section: U -Pb Agessupporting

confidence: 77%

“…Three samples from the Nam Co Complex have been collected for zircon separation (Figure 2). Samples SM14 and SM20 are semi -pelitic rocks, consisting of quartz, muscovite, chlorite, and minute granite; sample SM09 is finegrained sandstone (Hau et al, 2018). The U -Th -Pb isotopic dating on the detrital zircon was carried out from two semi -pelitic samples (SM14 and SM20, Figure 2b), whereas Hf isotopic analysis was carried out from SM14, SM20 and SM09.…”

Section: Methodsmentioning

confidence: 99%

“…peak centered around ~850 Ma, with characteristics of a magmatic arc setting (Hau et al, 2018). The detrital zircon U -Pb age distribution is comparable to that of the southern Yangtze Block, but differs from Indochina and Cathaysia, suggesting a primary detrital input derived from the southern Yangtze Block (Hau et al, 2018).…”

Section: Introductionmentioning

confidence: 90%

“…According to Hau et al (2018), sedimentary rocks of the Nam Co Complex were deposited in subduction -related basins along the southwestern margin of the Yangtze block during the Neoproterozoic. The Hf isotopic compositions of the detrital zircons also support this interpretation.…”

Section: Crustal Evolution Of the Southwestern Yangtze During Neoproterozoicmentioning

confidence: 99%

“…The Nam Co Complex located in northwestern Vietnam (see the detailed regional geological background in Hau et al, 2018) Yu et al, 2008).…”

Section: Introductionmentioning

confidence: 99%

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Paleo - position of the South China Craton in the Rodinia Supercontinent: Evidence from the U - Pb age and Hf isotope of detrital zircon from the Nam Co Complex

2021

JMES

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To constrain the paleo - positions of the South China Cratons in the Rodinia Supercontinent during the Neoproterozoic, the in - situ U - Pb dating, and Hf isotope analysis of the detrital zircon from the Nam Co Complex, Song Ma Suture zone, northwestern Vietnam was performed. The U - Pb isotopic dating on detrital zircons shows that the Nam Co Complex demonstrates the major population (>50%) of around ~850 Ma while the minor population is scattered between ~1.2÷3.0 Ga. The Neoproterozoic age spectrum exhibits a large range of the εHf(t) from strongly negative to positive values ( - 17.418022÷ 14.600527), indicating that the source of the magma for this age range has been not only derived from reworking of the Archean basement rocks, but also generated from the juvenile material. The U - Pb age distribution patterns and Hf isotopic data of the detrital zircon in the Nam Co Complex are compatible with those of the South China Craton rather than those of the Indochina Craton. The data also indicate that sedimentary protoliths of the Nam Co Complex were deposited in a convergent - related basin along the southwestern margin of the South China Craton during the Neoproterozoic. Combined with the similarities of the detrital zircon age between western Cathaysia, Indochina, East Antarctica and East India, it is proved that the South China Craton was situated at the margin of the Rodinia Supercontinent and in close proximity to the Indochina, East Antarctica and East India.

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Section: U -Pb Agessupporting

confidence: 77%

Section: Methodsmentioning

confidence: 99%