PETROCHEMITRY AND ZIRCON U-Pb AGE OF GRANODIORITE-TONALITE IN THE A'NYEMAQEN OPHIOLITIC BELT AN

来源 :Scientia Geologica Sinica | 被引量 : 0次 | 上传用户:aini412319016
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Zircon U-Pb age determination and petrochendstry research of the granodiorite-tonalite intrided inBuqinshan ophiolitic melange, the western sector of A’nyemaqen ophiolitic belt, are first done andreported in this paPer. Its zircon U-Pb age is 402±24Ma and belongs to Late Caledonian. The rockbelongs to calci-alkaline series, has the fethees of island-arc granite, Which hints that oceanic crustsubduction and island-arc magtnatism even occurred in the area in Eary Paleozoic. The researchachievement is of great significance to re-understand the tectonic frarnework and evolution of the area,even the Central orogenic Belt. Zircon U-Pb age determination and petrochendstry research of the granodiorite-tonalite intrided in Buqinshan ophiolitic melange, the western sector of A’nyemaqen ophiolitic belt, are first done and reproduced in this paPer. Its zircon U-Pb age is 402 ± 24Ma and belongs to Late Caledonian. The rockbelongs to calci-alkaline series, has the fethees of island-arc granite, Which hints that oceanic crustsubduction and island-arc magnatathism occurred in the area in Eary Paleozoic. The researchchachievement is of great significance to re-understand the tectonic frarnework and evolution of the area, even the Central orogenic Belt.
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