CAJ | 학술논문

对南秦岭西乡群孙家河组英安质火山熔岩进行了锆石SHRIMP U-Pb年龄和岩石化学、稀土元素、微量元素等方面的研究。获得的锆石年龄为814.8±5.2Ma,属于晚青白口世。该年龄为研究南秦岭扬子陆块过渡基底的形成时代提供了有力的佐证,并为研究扬子陆块Rodinia超大陆汇聚时限及秦岭造山带的构造演化提供了新证据。
대남진령서향군손가하조영안질화산용암진행료고석SHRIMP U-Pb년령화암석화학、희토원소、미량원소등방면적연구。획득적고석년령위814.8±5.2Ma,속우만청백구세。해년령위연구남진령양자륙괴과도기저적형성시대제공료유력적좌증,병위연구양자륙괴Rodinia초대륙회취시한급진령조산대적구조연화제공료신증거。
The dacitic lavas from the Sunjiahe Formation in the Xixiang Group, southern Qinling Ranges are examined on the basis of lithochemical, REE and Trace element data, and give a SHRIMP zircon U-Pb age of 814. 8 ± 5. 2 Ma which represents the late Qingbaikouan. This age provides a new evidence for the approaches to the ages of the transitional besement of the Yangtze block in southern Qinling Ranges, and the convergence timing of the supercontinent Rodinia in the Yangtze block and tectonic evolution of the Qinling orogenic zone.