• 责任者：Jia Delong (Faculty of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Yan Guangsheng
• 刊名：Acta Petrologica Sinica
• 出版年：2013
• 卷期：29(12)
• 关键词：杂岩 ; complexes ; 正长花岗岩 ; syenogranite ; 铀—铅计时 ; U-Pb dating ; 浙江 ; Zhejiang Province
• 页码：p.4087-4103
• 图表：13 illus., 4 tables, 115 refs.
• 分类号：0801
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

     The Guangshan granitic complex consists of two granitoids, the medium-grain alkali feldspar granite and the fine-grain alkali feldspar granite that intruded into the former. LA-MC-ICP-MS zircon U-Pb dating shows that they formed in Yanshanian （162.40.9Ma and 156.30.7Ma）, indicating that Guangshan intrusion is the product of two cycles of magmatic activities at least. The compositions of these two period granites fall into the calc-alkaline category, with an A/CNK ratio of 0.95~1.05. They have moderate REE and strong Eu depletion with a slightly right inclined sea-gull shaped REE pattern, and all belonging to A2-type granite. Zircon εHf（t） values of the granites are negative （-4.35 to 0）, and two-stage Hf model ages（tHf2）range from 1219Ma to 1478Ma, suggesting that these granites are originated from remelting of the Mesoproterozoic crustal materials. Combined with previous results, we infer that the late Early Yanshanian A-type granites in South China were formed in a post-orogenic extension environment.