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岩石学报  2006 

Earlier Devonian active continental arc in Central Tianshan:evidence of geochemical analyses and Zircon SHRIMP dating on mylonitized granitic rock.
中天山早泥盆世陆弧:来自花岗质糜棱岩地球化学及SHRIMP-U/Pb定年的证据

Keywords: Mylonitized dioritic-granitic pluton,geochemistry,zircon U/Pb SHRIMP dating,central Tianshan
糜棱岩化花岗岩
,地球化学,SHRIMP锆石U-Pb年龄,中天山

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Abstract:

Mylonitized dioritic-granitic plutons occurred in north of Baluntai area,central Tianshan,Northwest China.Element geochemical data reveal that the dioritic-granitic plutons were generated at active continental arc environment like today's Chile;zircon U/Pb SHRIMP dating and CL imaging indicat that the active continental volcano arc developed at 405 -416 Ma.These data demonstrat that the paleo-south Tianshan ocean crust started northward subducting under the central Tianshan block at earlier Devonian,resulting in a continental arc upon the overriding plate.The following collision between the central Tianshan block and the Tarim block might begin at later of Earlier Devonian.

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