Intracontinental subduction: a possible mechanism for the Early Palaeozoic Orogen of SE China

Michel Faure (1) , Liangshu S. Shu (2) , Bo Wang (2) , Jacques Charvet (1) , Flavien Choulet (1) , Patrick Monié (3)

1 ISTO - Institut des Sciences de la Terre d'Orléans
2 Department of Earth Sciences [Nanjing]
3 Géosciences Montpellier

The Early Palaeozoic Orogen of SE China consists of three litho-tectonic elements, from top to bottom: a sedimentary Upper Unit, a metamorphic Lower Unit and a gneissic basement. The boundaries between these units are flat lying, south directed, ductile decollements. The lower one is coeval with an amphibolite facies metamorphism (M1). The belt is reworked by migmatite-granite domes, high-temperature metamorphism (M2) and granitic plutons related to post-orogenic crustal melting. We date here the syn-M1 ductile shearing at 453 +/- 7 Ma by U-Th/Pb method on monazite. Previous ages and our new

Mots clés: SOUTH CHINA; U-PB; SOUTHEASTERN CHINA; JIANGXI PROVINCE; CATHAYSIA BLOCK; TECTONIC EVOLUTION; TIEN-SHAN; SM-ND; AGE; COLLISION

Domaines: Tectonique; Milieux et Changements globaux

Michel Faure, Liangshu S. Shu, Bo Wang, Jacques Charvet, Flavien Choulet, et al.. Intracontinental subduction: a possible mechanism for the Early Palaeozoic Orogen of SE China. Terra Nova, 2009, 21, pp.360-368. ⟨10.1111/j.1365-3121.2009.00888.x⟩. ⟨hal-00420901⟩