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, Tectonics (Under review

C. L. Yan, L. S. Shu, Y. Chen, and M. Faure, The construction mechanism of the Neoproterozoic S-type Sanfang-Yuanbaoshan granite plutons in the Jiangnan Orogenic Belt, South China: insights from the Geological observation, Geochronology, AMS and Bouger gravity modelling, 2018.

C. L. Yan, L. S. Shu, S. Scaillet, Y. Chen, and M. Faure, Early Paleozoic to Triassic geological events in the Sanfang-Yuanbaoshan, western Jiangnan region: the Argon isotopic record, 2018.

, Evolution tectonique Néoproterozoïque de la chaîne de Jiangnan Occidental et sa réactivation au Paléozoïque inférieur-Mésozoïque

, La chaîne de collision d'âge néoprotérozoïque de Jiangnan, orientée NE-SW, marque la limite entre les blocs du Yangtze et de

. Cathaysia, Une des questions les plus controversées est l'âge de la collision entre les deux blocs, nous avons collecté des échantillons dans les couches sédimentaires situées au dessus et au dessous de la discordance dans le but de comparer les spectres d'âge des zircons détritiques et aussi de les confronter à ceux décrits dans les séries néoprotérozoïques des régions du Yangtze, Jiangnan et Cathaysia. En outre, nous nous sommes intéressés aux plutons granitiques d'âge néoproterozoïque de Sanfang et Yuanbaoshan, de type-S

, Ma par la mise en oeuvre de méthodes pluridisciplinaires: géologie structurale, géochronologie U-Pb, AMS, modélisation gravimétrique et thermochronologie Argon

, Notre étude montre les résultats suivants: (i) La chaîne de Jiangnan s'est formée par la collision des blocs de Yangtze et Cathaysia entre ca. 865 and 830 Ma; (ii) Les intrusions granitiques de 830 Ma se sont mises en

E. , écoulement horizontal du magma du sud vers le nord; (iii) Un cisaillement ductile du haut vers l'Ouest a été reconnu dans la partie supérieure des plutons. Des âges Ar/Ar vers 420 Ma obtenus sur plusieurs grains de muscovite et biotite déformés impliquent que le cisaillement ductile peut être: a) formé pendant l'orogenèse du Paléozoïque inférieur de Chine du Sud, ou b) pendant la mise en place des plutons au Néoprotérozoïque dans une croûte chaude, sous la température de fermeture du chronomètre argon, puis lors de l'orogenèse du Paléozoïque inférieur, ce domaine crustal de Chine du Sud est passé au dessous de 350°C; (iv) Durant la période 420-240 Ma, groupe Sibao plissées et faillées. Les plutons ont été construits par accumulation latérale

, Discordance Néoproterozoîque; granite de type S