TY - JOUR
T1 - Late Paleozoic magmatism in South China
T2 - Oceanic subduction or intracontinental orogeny?
AU - Yu, Jin Hai
AU - Liu, Qian
AU - Hu, Xiu Mian
AU - Wang, Qin
AU - O'Reilly, Suzanne Y.
PY - 2013
Y1 - 2013
N2 - A gneissic granite with an U-Pb age of 313±4 Ma was found in northeastern Fujian Province, South China. It is an S-type granite characterized by high K2O, Al2O3 and low SiO2, Na2O contents with high A/CNK ratio of 1. 22 for the whole rock. Zircons with stubby morphology from the gneissic granite yield 206Pb/238U ages ranging from 326 to 301 Ma with a weighted average age of 313±4 Ma, and negative e{open}Hf(t) values from -8. 35 to -1. 74 with Hf model ages (TC DM) of 1. 43 to 1. 84 Ga. This S-type granite probably originated from late Paleoproterozoic crust in intracontinental orogeny. Integrated with previous results on paleogeographic reconstruction of South China, the nature of Paleozoic basins, Early Permian volcanism and U-Pb-Hf isotope of detrital zircons from the late Paleozoic to early Mesozoic sedimentary rocks, we suggest the occurrence of a late Paleozoic orogeny in the eastern Cathaysia Block, South China. This orogenic cycle includes Late Carboniferous (340-310 Ma) orogeny (compression) episode and Early Permian (287-270 Ma) post-orogenic or intraplate extension episode. Therefore, the late Paleozoic magmatism in the southeastern South China probably occurred during the intraplate orogeny rather than the arc-related process.
AB - A gneissic granite with an U-Pb age of 313±4 Ma was found in northeastern Fujian Province, South China. It is an S-type granite characterized by high K2O, Al2O3 and low SiO2, Na2O contents with high A/CNK ratio of 1. 22 for the whole rock. Zircons with stubby morphology from the gneissic granite yield 206Pb/238U ages ranging from 326 to 301 Ma with a weighted average age of 313±4 Ma, and negative e{open}Hf(t) values from -8. 35 to -1. 74 with Hf model ages (TC DM) of 1. 43 to 1. 84 Ga. This S-type granite probably originated from late Paleoproterozoic crust in intracontinental orogeny. Integrated with previous results on paleogeographic reconstruction of South China, the nature of Paleozoic basins, Early Permian volcanism and U-Pb-Hf isotope of detrital zircons from the late Paleozoic to early Mesozoic sedimentary rocks, we suggest the occurrence of a late Paleozoic orogeny in the eastern Cathaysia Block, South China. This orogenic cycle includes Late Carboniferous (340-310 Ma) orogeny (compression) episode and Early Permian (287-270 Ma) post-orogenic or intraplate extension episode. Therefore, the late Paleozoic magmatism in the southeastern South China probably occurred during the intraplate orogeny rather than the arc-related process.
UR - http://www.scopus.com/inward/record.url?scp=84874457221&partnerID=8YFLogxK
U2 - 10.1007/s11434-012-5376-8
DO - 10.1007/s11434-012-5376-8
M3 - Article
AN - SCOPUS:84874457221
SN - 1001-6538
VL - 58
SP - 788
EP - 795
JO - Chinese Science Bulletin
JF - Chinese Science Bulletin
IS - 7
ER -