ZHOU Xiong1 , 2, WEN Chun-qi1 , WEN Quan1, WU Peng-yu1 , CAO Sheng-yuan3 , FEI Guang-chun1 , HUO Yan1 , ZHOU Yu1
(1. School of Geosciences, Chengdu University of Technology , Chengdu 610059, China; 2. Institute of Multipurpose Utilization of Mineral Resources , Chinese Academy of Geological Sciences , Chengdu 610041, China; 3. 109th Geological Team, Sichuan Bureau of Geology and Mineral Resources , Chengdu 610100, China)
Abstract: The zircon U-Pb SHRIMP technique was applied to measure the age of the monzonit e granite-porphyry from the Bangpu porphy deposits in the eastern Gangdese porphyry belt. It was obtained that the 206Pb/ 238U mean age is 13. 9 +/- 0. 3 Ma ( MSWD = 3. 05) , which belongs to the late period of Himalaya. The Bangpu monzonite granite-porphyry was formed during the period of ore-bearing porphyries forming in the Gangdese metallogenic belt to the extension environment of post-collision ( 12~ 18 Ma) . Our new data suggest that the Bangpu monzonite granite-porphyry shared similar metallogenic dynamics settings t o the Gangdese copper belt, which belongs to a rapid outbreak of large-scale mineralizat ion process. Our new result is very important in confirming the active time of the Gangdese magma, provides chronological data and new inspiration for evolution studies of the whole Gangdese metallogenic belt.
Key words: U-Pb SHRIMP dating; zircon; monzonite granite-porphyry; porphyry Mo-Cu deposit ; Bangpu of Tibet
*Corresponding Author, E-Mail: zhouxiong27@163.com
Bulletin of Mineralogy, Petrology and Geochemistry Vol. 29, No.4, 2010, page 373-379
(Source from http://www.cnki.com.cn/)
