• 责任者：Chai Fengmei (Key Laboratory for Geodynamic Processes and Metallogenic Prognosis of the Central Asian Orogenic Belt ; Xinjiang University ; Urumqi 830049 ; China) ; Yang Fuquan
• 刊名：Chinese Journal of Geology
• 出版年：2012
• 卷期：47(1)
• 关键词：变火山岩 ; metavolcanic rocks ; 阿尔泰山 ; Altai Mountains
• 页码：p.221-239
• 图表：7 illus., 2 tables, 47 refs.
• 分类号：0802
• 出版序号：20130155
• issnNo：ISSN0563-5020
• isbnNo：CN11-1937/P

LA-ICP-MS U-Pb zircon ages and geochemical data of whole rocks are reported for meta-rhyolites from the Kangbutiebao Formation in the Maizi Basin at the southern margin of Altay orogenic belt. The zircon U-Pb isotopic data constrain their magmatic emplacement at (410.5±1.3) Ma and (400.4±2.1) Ma, respectively. The results presented in this study indicate that meta-rhyolites are characterized by high concentrations in SiO₂(72.15% to 81.26%), total alkali (Na₂O＋K₂O)(7.23% to 11.55%), and low concentrations in Al₂O₃(10.56% to 14.87%), TiO₂(0.16% to 0.27%), MgO(0.04% to 0.14%), CaO(0.04% to 2.42%) and TFe₂O₃（0.11% to 1.64%）.