Precambrian Tectono-Thermal Events of the Northern Margin of the Tarim Craton: Constraints of Zircon U-Pb Chronology from High-Grade Metamorphic Rocks of the Korla, Xinjiang
详细信息
- 责任者：Dong Xin (Institute of Geology ; Chinese Academy of Geological Sciences ; Beijing 100037 ; China) ; Zhang Zeming
- 刊名：Acta Petrologica Sinica
- 出版年：2011
- 卷期：27(1)
- 关键词：变质岩 ; metamorphic rocks ; 铀—铅计时 ; U-Pb dating ; 塔里木盆地 ; Tarim Basin
- 页码：p.47-58
- 图表：5 illus., 2 tables, 29 refs.
- 分类号：0802
- 出版序号：20120171
- issnNo：ISSN1000-0569
- isbnNo：CN11-1922/P
摘要
Zircon U-Pb chronology of high-grade metamorphic rocks from the northern margin of the Tarim Craton, was reported in this paper. The metamorphic rocks located on the Tiemenguan of northern Korla, was composed of gneiss, schist, amphibolite and calc-silicate rocks. They have mineral assemblages of plagioclase+K-feldspar+quartz+biotite±muscovite±hornblende±garnet, indicating amphibolite-facies conditions. The zircon U-Pb dating demonstrates that these high-grade metamorphic rocks have been subjected to three-stages of tectono-thermal events, i.e. the Early Paleoproterozoic magmatic event of ～2 370 Ma, the Late Paleoproterozoic metamorphic event of 1 890～1 850 Ma and the Early Neoproterozoic metamorphic event of 980～910 Ma. These results supply significant constrains on Precambrian tectonic evolution of Tarim Craton.