论文部分内容阅读
ObjectivernThe Dunhuang Block is located in the conjunction area of the Tarim Craton,Central Asian Orogenic Belt,North China Craton,and Tethyan tectonic domain,and is traditionally regarded as a Precambrian crystalline basement block.However,recent research concluded that the Dunhuang Block represents a Paleozoic orogenic belt.The granitoids that outcrop in the Dunhuang Block recorded tectonic-thermal events in both the Early and Late Paleozoic,which are crucial to understand the tectonic evolutionary history of the Dunhuang Block.In this study,we carried out new petrographic,zircon U-Pb geochronological,and geochemical analyses on the Late Paleozoic Yunlinhe granodiorite,and evaluated its petrogenesis,especially in terms of genesis type and the residual rock.