QQ客服 官方微博 反馈留言

	Ages and origin of the early Devonian granites from the north part of Chinese Altai Mountains and its tectonic implications
	Tong Ying ; Wang Tao ; Hong DaWei ; Dai YaJian ; Han BaoFu ; Liu XiaoMing
	2007
关键词	granite early paleozoic zircon U-Pb age geochemistry Altai PHANEROZOIC CRUSTAL GROWTH ND ISOTOPIC EVIDENCE CONTINENTAL GROWTH CENTRAL-ASIA U-PB ROCKS EVOLUTION XINJIANG OROGEN GEOCHEMISTRY
英文摘要	Zircon U-Pb (LA-ICPMS) dating yields the Pb-206/U-238 ages of 398 +/- 5Ma (MSWD =2.3) and 399 +/- 4 (MSWD = 1. 2) for the Kanasi and Qiongkur granite plutons from the north part of the Chinese Altai Mountains, respectively. The results, combing with previously published data, show that the 400Ma ca. granitoids distribute widely in the Chinese Altai, and this period is a very important granitoids formation stage. The Kanasi, Qiongkur and other 400Ma ca. granites are enriched in K, Al, REE and LILE ( Rb, K, Ba) with negative anomaly in Nb, Ta, Sr, Ti and P, and have negative epsilon(Nd) (t) values ( - 1. 5 similar to -0.5) and older t(DM) (1. 15 similar to 1.35Ga) in relation to other granitoids in this area, which suggest that the granitoids mainly follow calc-alkaline and high-K calc-alkaline trends, form in continental arc settings, and the sources of the granitoids contain both old continental and mantle-derived rocks. These features are the same as those of 400Ma ca. granitoids recognized from the central and southern Chinese Altai. All of these provide the new evidences for the seduction and accretion processes of the Chinese Altai in early-middle Paleozoic.; Geology; SCI(E); CPCI-S(ISTP); 0
语种	英语
内容类型	其他
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/397702]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Tong Ying,Wang Tao,Hong DaWei,et al. Ages and origin of the early Devonian granites from the north part of Chinese Altai Mountains and its tectonic implications. 2007-01-01.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。