Zircon U-PbSHRIMP age and origin of post-orogenic Lamazhao granitic;pluton from Altai orogen: its implications for vertical continental;growth.

	Zircon U-PbSHRIMP age and origin of post-orogenic Lamazhao granitic;pluton from Altai orogen: its implications for vertical continental;growth.
	Wang, T 4; Hong, DW ; Tong, Y ; Han, BF ; Shi, YR
刊名	ACTA PETROLOGICA SINICA
	2005
卷号	21 期号:3 页码:640-650
关键词	I-A type granite isotopic geochemistry mantle composition vertical continental growth Central Asia Orogenic Belt
ISSN号	1000-0569
英文摘要	The Lamazhao pluton is a typical post-tectonic pluton in the Altai orogen, but its emplacement time is still conclusively undetermined. This paper presents a zircon SHRIMP Pb-206/U-238 age of 276 +/- 9Ma (MSWD = 1.1), which is interpreted as his emplacement age. This provides an evidence for post-orogenic granitic magmatism and post orogeny. Major and trace elements show that the pluton has transition features from high-K calc-alkaline or high-fractionated I-type granites to A-type granites. Integration analysis of structural pattern, geochronology, geochemistry, and geological setting suggest that this pluton is post orogenic. Its Sr( T)(i) values are between 0.704 and 0.71659, epsilon(Nd) (T) values between +1.3 and +2.8, and TDM-2 from 0.93 to 0.81 Ga, which are similar to those of high ( positive) -epsilon(Nd) (T) value granites from the Central Asian Orogenic Belt. Importantly, its epsilon(Nd) ( T) values are slightly higher than these of syn-orogenic granites in the same area. This suggests that new juvenile mantle-derived materials, beside subducted juvenile ocean crust or arc rocks, probably contributed to the generation of the granites during post orogen in Altai orogen with Precambrian basement. This study provides an evidence for vertical continental crustal growth in the Central Asian Orogenic Belt.
学科主题	火成岩岩石学
WOS关键词	PHANEROZOIC CRUSTAL GROWTH ; A-TYPE GRANITES ; ND ISOTOPIC EVIDENCE ; I-TYPE GRANITES ; CENTRAL-ASIA ; NW CHINA ; NE CHINA ; NORTHEASTERN CHINA ; NORTHERN XINJIANG ; GEOCHEMISTRY
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000231179000006
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/38080]
专题	中国地质科学院地质研究所
作者单位	1.Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China. 2.Peking Univ, Key Lab Orogen Belt & Crustal Evolut, Beijing 100871, Peoples R China. 3.Chinese Acad Geol Sci, Beijing SHRIMP Ctr, Beijing 100037, Peoples R China. 4.中国地质科学院地质研究所
推荐引用方式 GB/T 7714	Wang, T,Hong, DW,Tong, Y,et al. Zircon U-PbSHRIMP age and origin of post-orogenic Lamazhao granitic;pluton from Altai orogen: its implications for vertical continental;growth.[J]. ACTA PETROLOGICA SINICA,2005,21(3):640-650.
APA	Wang, T,Hong, DW,Tong, Y,Han, BF,&Shi, YR.(2005).Zircon U-PbSHRIMP age and origin of post-orogenic Lamazhao granitic;pluton from Altai orogen: its implications for vertical continental;growth..ACTA PETROLOGICA SINICA,21(3),640-650.
MLA	Wang, T,et al."Zircon U-PbSHRIMP age and origin of post-orogenic Lamazhao granitic;pluton from Altai orogen: its implications for vertical continental;growth.".ACTA PETROLOGICA SINICA 21.3(2005):640-650.