Multi-mechanism Orogenic Model of the Su-Jiao Orogenic Belt

• Published in: Acta geologica Sinica (Beijing) Vol. 74; no. 2; pp. 201 - 206
• Main Authors: Jintao, FAN, Jiongda, CHEN, Huogen, CHEN
• Format: Journal Article
• Language: English
• Published: Oxford, UK Blackwell Publishing Ltd 01.06.2000
• Subjects: multi-mechanism; orogenic system; re-orogeny; Su-Jiao orogenic belt
• ISSN: 1000-9515; 1755-6724
• DOI: 10.1111/j.1755-6724.2000.tb00450.x

The Su‐Jiao orogenic belt is the eastern part of the Central Mountain System of China. Recent studies on its orogenic system indicate that the Su‐Jiao orogenic belt is a complex orogenic belt which suffered at least 3 orogenies of different mechanisms in the Mesoproterozoic, Neoproterozoic and Triassic respectively. The Meso‐Neoproterozoic orogenies belong to the Wilson cycle on the plate margins. The belt is a part of the Late Mesoproterozoic supercontinent Rodinia. The Triassic orogeny belongs to the re‐orogeny of the non‐Wilson cycle. Delamination of mountain roots occurred after both the Wilson and non‐Wilson cycles in the Su‐Jiao orogenic belt. The large‐amplitude isostatic uplift of mountains, magmatic activities and basin‐forming and mountain‐making in the upper crust, all indicate the general significance of delamination in the development of orogenic belts.