Thermotectonic evolution of the northern Kyrgyz Tien Shan intrusives

Content Provider	Semantic Scholar
Author	Glorie, Stijn Grave, Johan De Buslov, Mikhail
Copyright Year	2010
Abstract	The northern Kyrgyz Tien Shan (nKTS) encloses a large number of granitoid intrusions. These plutons intruded during the Palaeozoic and are geodynamical related to either Caledonian or Hercynian collisions. The most voluminous, i.e. the Caledonian intrusion phase is associated with the evolution and closure of the Early Palaeozoic Terskey Ocean (branch of the Turkestan Ocean). Hercynian plutons, smaller in both abundance and dimensions, are thought to have formed during the final closure of the Turkestan Ocean when the Tarim microcontinent eventually collided with the Kazakhstan plate. In the Late Palaeozoic – Early Mesozoic, the nKTS experienced tectonic quiescence. This geodynamic environment abruptly changed in the Mesozoic, when the Central Asian Orogenic System including the nKTS was reactivated as an intracontinental orogen (Cimmerian orogeny). The granitoids embedded in the basement record this phase as a cooling event. This cooling is a consequence of denudation and exhumation of the nKTS basement associated with this orogeny. The Late Mesozoic – Early Cenozoic introduced again a period of thermal stability. In the Cenozoic, a new phase of cooling, linked to renewed denudation as a tectonic far-field effect of the India-Eurasia collision, affected the nKTS basement.
File Format	PDF HTM / HTML
Volume Number	12
Alternate Webpage(s)	https://meetingorganizer.copernicus.org/EGU2010/EGU2010-1791.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article