Triassic rejuvenation of unexposed Archean-Paleoproterozoic deep crust beneath the western Cathaysia block, South China

Table S1: Zircon SIMS U-Pb data and d18O values for the meta-felsic rocks from Shitun area, Cathaysia block, South China; Table S2: LA-ICP-MS analysis of trace elements in zircon from the meta-felsic rocks, Shitun area, Cathaysia block, South China; Table S3: Zircon Hf isotope compositions of the meta-felsic rocks from Shitun area, Cathaysia block, South China; Table S4: Major- and trace-element compositions of the serpentinites, meta-ultramafic rocks, and meta-felsic rocks from Shitun area, Cathaysia block, South China; Table S5: Whole-rock Re-Os isotope compositions of the serpentinites from Shitun area, Cathaysia block, South China; and Table S6: Sr-Nd isotope compositions of the meta-ultramafic and meta-felsic rocks from Shitun area, Cathaysia block, South China.

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Mantle Upwelling Beneath the Cathaysia Block, South China

Tectonics ◽

10.1029/2020tc006447 ◽

2021 ◽

Vol 40 (4) ◽

Author(s):

Chuansong He ◽

M. Santosh

Keyword(s):

South China ◽

Mantle Upwelling ◽

Cathaysia Block

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The Mesoproterozoic Baoban Complex, South China: A missing fragment of western Laurentian lithosphere

Geological Society of America Bulletin ◽

10.1130/b35380.1 ◽

2019 ◽

Vol 132 (7-8) ◽

pp. 1404-1418 ◽

Cited By ~ 1

Author(s):

Ya-Jun Xu ◽

Peter A. Cawood ◽

Hang-Chuan Zhang ◽

Jian-Wei Zi ◽

Jin-Bo Zhou ◽

...

Keyword(s):

South China ◽

Detrital Zircon ◽

Hainan Island ◽

New Age ◽

Metasedimentary Rocks ◽

Basement Rocks ◽

Cathaysia Block ◽

Two Peaks

Abstract New age data for the Baoban Complex, South China establishes that it lay outboard of western Laurentia in the early Mesoproterozoic but was not part of the Cathaysia Block, with which it is traditional linked, until the mid-Paleozoic. Our geochronology data for detrital zircon and authigenic monazite grains from metasedimentary rocks indicate accumulation between ca. 1.55 Ga and 1.45 Ga for the Gezhencun succession of the Baoban Complex and ca. 1.45 Ga and 1.30 Ga for the Ewenling succession. The former unit is dominated by detrital zircon populations between 1900 Ma and 1500 Ma with two peaks at 1780 Ma and 1580 Ma. The Ewenling succession has detrital zircon peaks at 1720 Ma and 1450 Ma. Newly discovered gneissic granites were emplaced at 1550 Ma and intruded by 1450 Ma leucogranite dykes that are coeval with 1460–1430 Ma bimodal magmatism. The whole Baoban Complex was metamorphosed over the range of 1.3–0.9 Ga based on ages of authigenic zircon and monazite. Depositional ages of metasedimentary rocks are coeval with successions of the Belt-Purcell Basin, western Laurentia. Detrital zircon from the two regions have similar age populations and Lu-Hf compositions, and display a synchronous provenance shift at ca. 1.45 Ga. Basement lithologies on Hainan Island range in age from ca. 1.55–1.43 Ga and underwent metamorphism during 1.3–0.9 Ga. This is younger than basement rocks on the mainland of the Cathaysia Block in South China, suggesting the two regions are spatially unrelated at this time and hence the Mesoproterozoic record of the island cannot constrain the location of the Cathaysia Block in the Nuna and Rodinia supercontinents.

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Detrital zircon U-Pb-Hf isotopes and whole-rock geochemistry of neoproterozoic-cambrian successions in the Cathaysia Block of South China: Implications on paleogeographic reconstruction in supercontinent

Precambrian Research ◽

10.1016/j.precamres.2019.105348 ◽

2019 ◽

Vol 331 ◽

pp. 105348 ◽

Cited By ~ 6

Author(s):

Er-Kun Xue ◽

Wei Wang ◽

Si-Fang Huang ◽

Gui-Mei Lu

Keyword(s):

South China ◽

Detrital Zircon ◽

Hf Isotopes ◽

Paleogeographic Reconstruction ◽

Cathaysia Block

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Detrital zircon geochronology of pre-Cretaceous strata: tectonic implications for the Jiangnan Orogen, South China

Geological Magazine ◽

10.1017/s0016756813001003 ◽

2014 ◽

Vol 151 (6) ◽

pp. 975-995 ◽

Cited By ~ 22

Author(s):

JINBAO SU ◽

SHUWEN DONG ◽

YUEQIAO ZHANG ◽

YONG LI ◽

XUANHUA CHEN ◽

...

Keyword(s):

South China ◽

North China ◽

Seismic Profile ◽

Upper Jurassic ◽

Detrital Zircons ◽

South China Block ◽

Yangtze Block ◽

The South ◽

Provenance Data ◽

Cathaysia Block

AbstractFifteen sandstone samples taken from pre-Cretaceous strata of the Yangtze Block are analysed to constrain the evolution of the South China Block, especially the assembly between the Yangtze and Cathaysia blocks. The results show that the maximum depositional age of the Neoproterozoic Lengjiaxi Group adjacent to the Cathaysia Block isc. 830 Ma, differing from that of the Kunyang and Dahongshan groups (> 960 Ma) on the southwestern margin of the Yangtze Block. The detrital zircons from Palaeozoic samples from the Yangtze Block have similar age populations to those in the Cathaysia Block, and they may originate from the Cathaysia Block according to palaeogeographic, palaeocurrent and former research data. The detrital zircons of Middle–Upper Jurassic sandstones in the southwestern and central Yangtze Block yield dominant age populations at 2.0–1.7 Ga and subordinate groups of 2.6–2.4 Ga, 0.8–0.7 Ga and 0.6–0.4 Ga. The Upper Triassic strata may be derived from the southern Yangtze and North China blocks due to the collisions between the Indosina, South China and North China blocks, whereas the Jurassic sediments may be partly derived from uplift and erosion of the Jiangnan Orogen due to an intracontinental orogeny induced by Pacific subduction towards the Eurasia Plate. The detrital age spectra and provenance data for basement in the South China Block are analysed and compared with each other. The South China Block has affinity with Australia not only in the Columbia supercontinent but also in the Rodinia supercontinent. We infer the existence of an ancient orogen under the western Jiangnan Orogen, which may have occurred during the Columbia age, earlier than the Sibao orogeny. This is supported by seismic profile proof from the SinoProbe.

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