Zircon SHRIMP U-Pb dating of granites from Dulan and the chronological framework of the North Qaidam UHP belt, NW China

doi:10.1007/s11430-014-4958-5

	Zircon SHRIMP U-Pb dating of granites from Dulan and the chronological framework of the North Qaidam UHP belt, NW China
	Wu CaiLai 12; Gao YuanHong ; Li ZhaoLi ; Lei Min ; Qin HaiPeng ; Li MinZe ; Liu ChunHua ; Frost, Ronald B.; Robinson, Paul T.; Wooden, Joseph L.
刊名	SCIENCE CHINA-EARTH SCIENCES
	2014
卷号	57 期号:12 页码:2945-2965
关键词	granite zircon SHRIMP U-Pb dating Dulan
ISSN号	1674-7313
DOI	10.1007/s11430-014-4958-5
英文摘要	Zircon SHRIMP dating of granites from Dulan, east segment of North Qaidam UHP belt shows that they are 406.6 +/- 3.5 Ma for Yematan-E, 407.3 +/- 4.3 and 397 +/- 6 Ma for Balijiehatan-W, 404.5 +/- 4.0 and 397.0 +/- 3.7 Ma for Shuiwenzhan-N, 380.5 +/- 5.0 Ma for Shuiwenzhan-S, 382.5 +/- 3.6 and 372.5 +/- 2.8 Ma for Chachagongma. These granites from Dulan represent the products of the third and fourth periods of Paleozoic magmatism in North Qaidam. Geochemically, the granitoids with metalumious to weak peratuminous are quartz diorite, granodiorite, and granite in composition and mainly belong to calc-alkaline series, a few samples to calc or alkali-calc series. The third period of granites is a rock association of granodiorite + granite, with initial Sr-87/Sr-86 ratios from 0.7082 to 0.7110 and T (2DM) model ages from 1.41-1.90 Ga; and the fourth period of granites is a rock association of quartz diorite+granodiorite+granite, with initial Sr-87/Sr-86 ratios from 0.7072 to 0.7091 and T (2DM) model ages from 1.07-1.38 Ga. Therefore, the third period of granites has higher initial Sr-87/Sr-86 ratios and T-2DM model ages. On the contrary, the fourth period of granites has E > (Nd)(t) values from 0.6 to -3.0, higher than that of the third granite with E > (Nd)(t) values -3.2 to -9.3. Thus, the data comparison indicates that the third granites may derive from Paleo-proterzoic continental crust with mantle material whereas the fourth granites may derive from the Meso-proterzoic basalt crust with continental material. Combined with regional geology, we thought that the third granites were formed relative to plate exhumation and the fourth granites to delamination of the lithospheric mantle.
学科主题	变质岩岩石学
WOS关键词	ND ISOTOPIC CHARACTERISTICS ; PRESSURE METAMORPHIC BELT ; GEOCHEMICAL CLASSIFICATION ; GEOLOGICAL SIGNIFICANCE ; BEARING ZIRCONS ; TIBETAN PLATEAU ; FOLD BELT ; S-TYPE ; I-TYPE ; SUBDUCTION
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000346170700009
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40502]
专题	中国地质科学院地质研究所
作者单位	1.[Wu CaiLai 2.Gao YuanHong 3.Li ZhaoLi 4.Lei Min 5.Qin HaiPeng 6.Li MinZe 7.Liu ChunHua 8.Robinson, Paul T.] State Key Lab Continental Tecton & Dynam, Beijing 100037, Peoples R China 9.Robinson, Paul T.] Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 10.[Frost, Ronald B.] Univ Wyoming, Laramie, WY 82072 USA
推荐引用方式 GB/T 7714	Wu CaiLai,Gao YuanHong,Li ZhaoLi,et al. Zircon SHRIMP U-Pb dating of granites from Dulan and the chronological framework of the North Qaidam UHP belt, NW China[J]. SCIENCE CHINA-EARTH SCIENCES,2014,57(12):2945-2965.
APA	Wu CaiLai.,Gao YuanHong.,Li ZhaoLi.,Lei Min.,Qin HaiPeng.,...&Wooden, Joseph L..(2014).Zircon SHRIMP U-Pb dating of granites from Dulan and the chronological framework of the North Qaidam UHP belt, NW China.SCIENCE CHINA-EARTH SCIENCES,57(12),2945-2965.
MLA	Wu CaiLai,et al."Zircon SHRIMP U-Pb dating of granites from Dulan and the chronological framework of the North Qaidam UHP belt, NW China".SCIENCE CHINA-EARTH SCIENCES 57.12(2014):2945-2965.