scholarly journals Supplemental Material: The Mesozoic magmatic, metamorphic, and tectonic evolution of the eastern Gangdese magmatic arc, southern Tibet

2021 ◽  
Author(s):  
Zeming Zhang
Keyword(s):  
Trace Element ◽  
Late Cretaceous ◽  
Tectonic Evolution ◽  
Chemical Compositions ◽  
Isotopic Data ◽  
Southern Tibet ◽  
Magmatic Arc ◽  
Magmatic Rocks

Table S1: Major features of the reported Jurassic magmatic rocks of the eastern Gangdese arc; Table S2: Zircon U-Pb dating and trace element (in ppm) data of the studied Jurassic magmatic rocks of the eastern Gangdese arc; Table S3: Zircon Hf isotopic data of the studied Jurassic magmatic rocks of the eastern Gangdese arc; Table S4: Whole-rock chemical compositions of the studied Jurassic magmatic rocks of the eastern Gangdese arc; Table S5: Whole-rock chemical compositions of the Mesozoic magmatic rocks of the eastern Gangdese arc; Table S6: Whole-rock SiO2 and Cu concentrations of the Late Cretaceous magmatic rocks of the eastern Gangdese arc.

scholarly journals Supplemental Material: The Mesozoic magmatic, metamorphic, and tectonic evolution of the eastern Gangdese magmatic arc, southern Tibet

2021 ◽  
Author(s):  
Zeming Zhang
Keyword(s):  
Trace Element ◽  
Late Cretaceous ◽  
Tectonic Evolution ◽  
Chemical Compositions ◽  
Isotopic Data ◽  
Southern Tibet ◽  
Magmatic Arc ◽  
Magmatic Rocks

Table S1: Major features of the reported Jurassic magmatic rocks of the eastern Gangdese arc; Table S2: Zircon U-Pb dating and trace element (in ppm) data of the studied Jurassic magmatic rocks of the eastern Gangdese arc; Table S3: Zircon Hf isotopic data of the studied Jurassic magmatic rocks of the eastern Gangdese arc; Table S4: Whole-rock chemical compositions of the studied Jurassic magmatic rocks of the eastern Gangdese arc; Table S5: Whole-rock chemical compositions of the Mesozoic magmatic rocks of the eastern Gangdese arc; Table S6: Whole-rock SiO2 and Cu concentrations of the Late Cretaceous magmatic rocks of the eastern Gangdese arc.

scholarly journals Supplemental Material: Early Cenozoic partial melting of meta-sedimentary rocks of the eastern Gangdese arc, southern Tibet, and its contribution to syn-collisional magmatism

2021 ◽  
Author(s):  
Yuan-Yuan Jiang ◽  
et al.
Keyword(s):  
Trace Element ◽  
Partial Melting ◽  
Sedimentary Rocks ◽  
Hf Isotope ◽  
Chemical Compositions ◽  
Trace Element Data ◽  
Southern Tibet ◽  
Magmatic Arc ◽  
Isotope Data ◽  
Early Cenozoic

The chemical compositions of minerals from the paragneisses (Tables S1–S3), the zircon and monazite age and trace element data of the paragneisses and leucosome (Tables S4–S5), and the zircon Lu-Hf isotope data of the paragneisses and leucosome (Table S6) from the eastern Gangdese magmatic arc.

scholarly journals Supplemental Material: Early Cenozoic partial melting of meta-sedimentary rocks of the eastern Gangdese arc, southern Tibet, and its contribution to syn-collisional magmatism

2021 ◽  
Author(s):  
Yuan-Yuan Jiang ◽  
et al.
Keyword(s):  
Trace Element ◽  
Partial Melting ◽  
Sedimentary Rocks ◽  
Hf Isotope ◽  
Chemical Compositions ◽  
Trace Element Data ◽  
Southern Tibet ◽  
Magmatic Arc ◽  
Isotope Data ◽  
Early Cenozoic

The chemical compositions of minerals from the paragneisses (Tables S1–S3), the zircon and monazite age and trace element data of the paragneisses and leucosome (Tables S4–S5), and the zircon Lu-Hf isotope data of the paragneisses and leucosome (Table S6) from the eastern Gangdese magmatic arc.

Early Cenozoic partial melting of meta-sedimentary rocks of the eastern Gangdese arc, southern Tibet, and its contribution to syn-collisional magmatism

2021 ◽  
Author(s):  
Yuan-Yuan Jiang ◽  
Ze-Ming Zhang ◽  
Richard M. Palin ◽  
Hui-Xia Ding ◽  
Xuan-Xue Mo
Keyword(s):  
Partial Melting ◽  
Lower Crust ◽  
Sedimentary Rocks ◽  
Late Carboniferous ◽  
Southern Tibet ◽  
Magmatic Arc ◽  
Magmatic Rocks ◽  
Deep Crust ◽  
Juvenile Crust ◽  
Early Cenozoic

Continental magmatic arcs are characterized by the accretion of voluminous mantle-derived magmatic rocks and the growth of juvenile crust. However, significant volumes of meta-sedimentary rocks occur in the middle and lower arc crust, and the contributions of these rocks to the evolution of arc crust remain unclear. In this paper, we conduct a systematic study of petrology, geochronology, and geochemistry of migmatitic paragneisses from the eastern Gangdese magmatic arc, southern Tibet. The results show that the paragneisses were derived from late Carboniferous greywacke, and underwent an early Cenozoic (69−41 Ma) upper amphibolite-facies metamorphism and partial melting at pressure-temperature conditions of ∼11 kbar and ∼740 °C, and generated granitic melts with enriched Hf isotopic compositions (anatectic zircon εHf(t) = −10.57 to +0.78). Combined with the existing results, we conclude that the widely distributed meta-sedimentary rocks in the eastern Gangdese arc deep crust have the same protolith ages of late Carboniferous, and record northwestward-decreasing metamorphic conditions. We consider that the deeply buried sedimentary rocks resulted in the compositional change of juvenile lower crust from mafic to felsic and the formation of syn-collisional S-type granitoids. The mixing of melts derived from mantle, juvenile lower crust, and ancient crustal materials resulted in the isotopic enrichment of the syn-collisional arc-type magmatic rocks of the Gangdese arc. We suggest that crustal shortening and underthrusting, and the accretion of mantle-derived magma during the Indo-Asian collision transported the supracrustal rocks to the deep crust of the Gangdese arc.

scholarly journals Late Cretaceous high-Mg# granitoids in southern Tibet: Implications for the early crustal thickening and tectonic evolution of the Tibetan Plateau?

Lithos ◽  
2015 ◽  
Vol 232 ◽  
pp. 12-22 ◽  
Author(s):  
Jian-Lin Chen ◽  
Ji-Feng Xu ◽  
Hong-Xia Yu ◽  
Bao-Di Wang ◽  
Jian-Bin Wu ◽  
...  
Keyword(s):  
Tibetan Plateau ◽  
Late Cretaceous ◽  
Tectonic Evolution ◽  
Crustal Thickening ◽  
The Tibetan Plateau ◽  
Southern Tibet

scholarly journals Supplemental Material: Metamorphism and geochronology of high-pressure mafic granulites (retrograded eclogites?) in East Cathaysia terrane of South China: Implications for Mesozoic tectonic evolution

2021 ◽  
Author(s):  
Yanfei Xia ◽  
Changqing Yin ◽  
et al.
Keyword(s):  
High Pressure ◽  
Trace Element ◽  
South China ◽  
Tectonic Evolution ◽  
Trace Element Data ◽  
Isotopic Data ◽  
Element Data ◽  
Mineral Compositions

Supplemental tables contain the whole-rock and mineral compositions, PT estimates, zircon SIMS Th-U-Pb isotopic data and trace element data.

scholarly journals Supplemental Material: Metamorphism and geochronology of high-pressure mafic granulites (retrograded eclogites?) in East Cathaysia terrane of South China: Implications for Mesozoic tectonic evolution

2021 ◽  
Author(s):  
Yanfei Xia ◽  
Changqing Yin ◽  
et al.
Keyword(s):  
High Pressure ◽  
Trace Element ◽  
South China ◽  
Tectonic Evolution ◽  
Trace Element Data ◽  
Isotopic Data ◽  
Element Data ◽  
Mineral Compositions

Supplemental tables contain the whole-rock and mineral compositions, PT estimates, zircon SIMS Th-U-Pb isotopic data and trace element data.

scholarly journals Supplemental Material: Metamorphism and geochronology of high-pressure mafic granulites (retrograded eclogites?) in East Cathaysia terrane of South China: Implications for Mesozoic tectonic evolution

2021 ◽  
Author(s):  
Yanfei Xia ◽  
Changqing Yin ◽  
et al.
Keyword(s):  
High Pressure ◽  
Trace Element ◽  
South China ◽  
Tectonic Evolution ◽  
Trace Element Data ◽  
Isotopic Data ◽  
Element Data ◽  
Mineral Compositions

Supplemental tables contain the whole-rock and mineral compositions, PT estimates, zircon SIMS Th-U-Pb isotopic data and trace element data.

The Gedan floristic assemblage from the Late Cretaceous deposits of the Kholchan Formation of the Okhotsk-Chukotka volcanogenic belt

Palaeobotany ◽  
2014 ◽  
Vol 5 ◽  
pp. 73-93 ◽  
Author(s):  
L. B. Golovneva ◽  
S. V. Shczepetov
Keyword(s):  
River Basin ◽  
Late Cretaceous ◽  
Middle Part ◽  
Isotopic Data ◽  
Volcanogenic Belt ◽  
Stratigraphic Position ◽  
Cretaceous Deposits

The Gedan floristic assemblage occurs from upper layers of the Kholchan Formation of the Okchotsk-Chukotka volcanogenic belt (OCVB). The locality is situated at the Gedan River in the middle part of the Arman River basin. The Gedan assemblage is composed of 6 taxa: Cladophlebis sp., Sphenobaiera sp., Ginkgo ex gr. adiantoides (Ung.) Heer, Taxodium amguemensis (Efimova) Golovn., Metasequoia sp., Pagiophyllum sp. The similarity of the Gedan floristic assemblage with the Karamken and the Khirumki floristic assemblages from the Kholchan Formation of the Okhotsk sector of the OCVB allows us to join them in the Kholchan flora. This flora is distinct from more ancient Arman flora, which dated as the Turonian-Coniacian and from younger Ola flora, which dated as the Santonian-early Campanian. The age of the Kholchan flora is estimated as the Coniacian on the basis of stratigraphic position, presence of Podozamites, Metasequoia and Quereuxia and also isotopic data. This flora is equivalent with the Chaun flora of Central Chukotka, with the Aleeki flora from the Villigha and Toomahni Rivers interfluve and with the Ulya flora from the southern part of the Okhotsk-Chukotka volcanogenic belt.

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