CAJ | 학술논문

秦岭造山带是华北克拉通和扬子克拉通的缝合带，经历了复杂的碰撞-扩张-聚合的演化，以商-丹断裂带为界被分为北秦岭和南秦岭。本文对北秦岭秦岭岩群（杂岩）中的斜长角闪岩和角闪黑云斜长片麻岩进行了地球化学、锆石U-Pb年代学和锆石Hf同位素研究，斜长角闪岩（变质玄武岩）中含有大量新元古代早期（888～957 Ma）和中元古代（～1424 Ma）的捕获锆石，其原岩的形成时代应早于新元古代早期；角闪黑云斜长片麻岩中的变质锆石指示秦岭岩群（杂岩）在早古生代经历了变质-热事件，其锆石εHf（t）值变化于9.0～12.0，指示其原岩源于亏损地幔。
진령조산대시화북극랍통화양자극랍통적봉합대，경력료복잡적팽당-확장-취합적연화，이상-단단렬대위계피분위북진령화남진령。본문대북진령진령암군（잡암）중적사장각섬암화각섬흑운사장편마암진행료지구화학、고석U-Pb년대학화고석Hf동위소연구，사장각섬암（변질현무암）중함유대량신원고대조기（888～957 Ma）화중원고대（～1424 Ma）적포획고석，기원암적형성시대응조우신원고대조기；각섬흑운사장편마암중적변질고석지시진령암군（잡암）재조고생대경력료변질-열사건，기고석εHf（t）치변화우9.0～12.0，지시기원암원우우손지만。
The Qinling orogenic belt,located between the North China Craton and the Yangtze Craton,has a complex evolution of collision-expansion-aggregation.The Qinling orogenic belt is composed of the Northern Qinling Belt and the Southern Qinling Belt,separated by Shangnan-Danfeng suture.This study presents geo-chemical data,zircon U-Pb ages and Hf isotopes for the amphibolite and hornblende-biotite-plagioclase gneiss from the Qinling complex in Northern Qinling Belt.The results show that the amphibolite (meta-basalt)con-tains a lot of zircons with the early Neoproterozoic (888 -957)and Mesoproterozoic (~1 424 Ma)ages, which were probably captured.The protolith of the amphibolite was probably formed earlier than early Neoprot-erozoic.The metamorphic zircons from the hornblende-biotite-plagioclase gneiss indicated a metamorphic-ther-mal event in the Qinling complex in early Paleozoic.TheεHf(t)values of zircons suggests that the protolith was originated from the depleted mantle.