• 责任者：Qin Ya (College of Earth Sciences ; Jilin University ; Changchun 130061 ; China) ; Liang Yihong
• 刊名：Earth Science
• 出版年：2013
• 卷期：38(4)
• 页码：p.677-688
• issnNo：ISSN1000-2383
• isbnNo：CN42-1233/P

Major and trace elements analysis and LA-ICP-MS zircon U-Pb ages show Toudao, Laoling, Shanglvshuiqiao and Gaotaizi plutons are Early Cretaceous aluminum A-type granites in the Laoling area, South of Jilin Province. Plutons mainly consist of k-feldspar granite, miarolitic k-feldspar granite, granite porphyry and granites. The results of LA-ICP-MS dating are （121--125） Ma. The major elements of granitoids are high in St, alk and low in Fe, Mg, Ca, and Ti. Trace elements are en- riched in incompatible elements such as K, Rb, Th and depleted in Ba, Sr, Ti, Nb, Ta, and P. The granitoids have right-wing type of chondrite-normalized REE patterns and moderate negative Eu anomalies. Geochemical features indicate that granitoids are aluminum A-type granites （A/CNK= （0. 82--1.15）, A/NK= （1.00--1.28））. Granitoids with relatively low incompatible element ratio values such as Ce/Nb, Y/Nb and Yb/Ta are Al-type anorogenic granite. The formation of Al-type granite indi- cates Laoling area is in the Anorogenic extensional tectonic setting during Early Cretaceous.