DOI: 10.1007/s00531-016-1297-0
论文题名: Age and petrogenesis of late Paleozoic granites from the northernmost Alxa region, northwest China, and implications for the tectonic evolution of the region
作者: Zhang W. ; Pease V. ; Meng Q. ; Zheng R. ; Wu T. ; Chen Y. ; Gan L.
刊名: International Journal of Earth Sciences
出版年: 2017
卷: 106, 期: 1 起始页码: 79
结束页码: 96
语种: 英语
英文关键词: Alxa
; Central Asia Orogenic Belt
; Granite
; Paleozoic
; Tectonics
Scopus关键词: continental crust
; emplacement
; geochronology
; granite
; island arc
; orogenic belt
; Paleozoic
; petrogenesis
; tectonic evolution
; uranium-lead dating
; zircon
; Alxa Plateau
; China
; Nei Monggol
英文摘要:
The Wudenghan, Huhetaoergai and Zhuxiaobuguhe plutons, northern Alxa region, in the southern Central Asia Orogenic Belt are dated by U–Pb zircon to 383 ± 3, 356 ± 3 and 286 ± 2 Ma, respectively. The late Devonian Wudenghan monzogranite, a highly fractionated I-type granite with εNd(t) (−0.2 to −0.1) and very low (87Sr/86Sr)t (0.704719–0.706113), is from mantle-derived magmas and shows volcanic arc characteristics. The early Carboniferous Huhetaoergai granodiorite with medium-K calc-alkaline peraluminous characteristics represents a volcanic arc granite generated from partial melting of lower continental crust combined with mantle-derived input. The early Permian Zhuxiaobuguhe pluton, an unfractionated calc-alkaline granodiorite with moderately low εNd(t) (−2.0 to −1.1) and low (87Sr/86Sr)t (0.708370–0.708462), was likely derived from partial melting of the mafic lower crust of a paleo-volcanic arc and represents a post-collisional granite. Our revised tectonic evolution of the region includes (1) northward subduction of the oceanic crust represented by the Engger Us Ophiolitic Belt and formation of the late Devonian Wudenghan monzogranite, (2) northward subduction of the ocean between the Huhetaoergai and Zhusileng tectonic zones and the formation of the Huhetaoergai volcanic arc granite during the early Carboniferous and (3) the emplacement of the Zhuxiaobuguhe pluton in the early Permian during post-collisional extension. © 2016, Springer-Verlag Berlin Heidelberg.
URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84955324132&doi=10.1007%2fs00531-016-1297-0&partnerID=40&md5=6a59e6fd4d72bc46cba29a3d05ca4a55
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/70092
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Institute of Geology, Chinese Academy of Geological Sciences, Beijing, China; Laboratory of Orogenic Belts and Crustal Evolution, Ministry of Education, School of Earth and Space Sciences, Peking University, Beijing, China; Department of Geological Sciences, Stockholm University, Stockholm, Sweden
Recommended Citation:
Zhang W.,Pease V.,Meng Q.,et al. Age and petrogenesis of late Paleozoic granites from the northernmost Alxa region, northwest China, and implications for the tectonic evolution of the region[J]. International Journal of Earth Sciences,2017-01-01,106(1)