Cooling paths during the Mesozoic Extensional Tectonics of NE China: example from the South Liaodong Peninsula Metamorphic Core Complex - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Journal of Asian Earth Sciences Year : 2011

Cooling paths during the Mesozoic Extensional Tectonics of NE China: example from the South Liaodong Peninsula Metamorphic Core Complex

Abstract

The South Liaodong Peninsula massif is the easternmost Mesozoic Metamorphic Core Complex, recognized in Eastern China. It provides a good example of the combination of ductile shearing, synkinematic plutonism and polyphase exhumation. The Jurassic granodioritic plutons, located at the footwall of the detachment normal fault, and dated here at ca 160 Ma, recorded two different phases of cooling. A slow cooling regime of about 3-10°C/my prevailing before 122 Ma, was followed by a significant increase in cooling rate of about 40-55°C/my after that time. By contrast, a single fast cooling path was recorded by the Cretaceous monzogranite situated in the footwall of the detachment normal fault. This result indicates that the Jurassic and Cretaceous plutons recorded different exhumation processes: a Jurassic slow or negligible exhumation and a Cretaceous fast one assisted by normal faulting. These two cooling stages correspond to distinct geodynamic processes during the Jurassic and Cretaceous. Extensional tectonics seems not significant before Early Cretaceous. The second stage, dominated by an extensional regime which develops after ca 120 Ma, is tentatively correlated to the lithosphere removal of the North China Craton.
Fichier principal
Vignette du fichier
Lin-JAsianEarthSciences-2010.pdf (2.79 Mo) Télécharger le fichier
Origin : Files produced by the author(s)
Loading...

Dates and versions

insu-00528171 , version 1 (25-10-2010)

Licence

Attribution - NonCommercial - NoDerivatives

Identifiers

Cite

Wei Lin, Patrick Monié, Michel Faure, Urs Schärer, Yonghong Shi, et al.. Cooling paths during the Mesozoic Extensional Tectonics of NE China: example from the South Liaodong Peninsula Metamorphic Core Complex. Journal of Asian Earth Sciences, 2011, 42 (5), pp.1048-1065. ⟨10.1016/j.jseaes.2010.09.007⟩. ⟨insu-00528171⟩
1591 View
419 Download

Altmetric

Share

Gmail Facebook X LinkedIn More