沉积与特提斯地质2012，Vol.32Issue(4)：59-64,6.
滇西腾冲地块东南缘早白垩世火山岩锆石U-Pb定年及地质意义
LA-LCP-MS zircon U-Pb dating and geological implications for the Early Cretaceous volcanic rocks on the southeastern margin of the Tengchong block, western Yunnan
摘要
Abstract
A succession of undated epimetamorphic sedimentary strata occurs in the Gaoligong metamorphic rock zone east of the Tengchong block, western Yunnan. The acidic volcanic rocks in these strata were identified during the 1:50 000 regional geological survey in the stratigraphic sequences of the Tuanpo section, Xuangang, Luxi, and give a zircon U-Pb age of 121. 4 ± 1. 4 Ma. This age has revealed that the stratigraphic sequences cited above should be dated back to the Early Cretaceous during which the volcanic activities once took place in the study area. The Early Cretaceous felsic volcanic rocks in the study area may owe their origin to the closure of the Nujiang oceanic basin.关键词
滇西/火山岩/早白垩世/锆石U-Pb定年Key words
western Yunnan/ volcanic rock/ Early Cretaceous/ zircon U-Pb dating分类
天文与地球科学引用本文复制引用
高永娟,林仕良,丛峰,邹光富,谢韬,唐发伟,李再会,梁婷..滇西腾冲地块东南缘早白垩世火山岩锆石U-Pb定年及地质意义[J].沉积与特提斯地质,2012,32(4):59-64,6.基金项目
云南1∶5万梁河县、江东、帕底幅区域地质调查项目(1212010784007) （1212010784007）
