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LA-ICP-MS U-Pb zircon, columbite-tantalite and Ar-40-Ar-39 muscovite age constraints for the rare-element pegmatite dykes in the Altai orogenic belt, NW China

文献类型：期刊论文

作者Zhou, Qifeng1; Qin, Kezhang1; Tang, Dongmei1; Wang, Chunlong1,2,3; Sakyi, Patrick Asamoah4
刊名GEOLOGICAL MAGAZINE
出版日期2018-03-01
卷号155期号:3页码:707-728
关键词Columbite-tantalite U-Pb age zircon U-Pb age muscovite Ar-40-Ar-39 age rare-element pegmatite Altai
ISSN号0016-7568
DOI10.1017/S0016756816001096
文献子类Article
英文摘要The Chinese Altai is renowned for its rich rare-element resources. Nine representative rare-element (REL) pegmatites were dated using LA-ICP-MS and Ar-40-Ar-39 methods. The columbite grains yield a weighted mean Pb-206/U-238 age of 239.6 +/- 3.8 Ma for the Dakalasu (Be-Nb-Ta) pegmatite and concordia U-Pb ages of 258.1 +/- 3.1 Ma and 262.3 +/- 2.5 Ma for the Xiaokalasu (Li-Nb-Ta) pegmatite. The zircons display a weighted mean Pb-206/U-238 age of 198.5 +/- 2.5 Ma for the Husite (Be) pegmatite and concordia U-Pb ages of 194.3 +/- 1.6 Ma and 248.2 +/- 2.2 Ma for the Qunkuer (Be) and Taerlang (barren) pegmatites. The muscovite Ar-40-Ar-39 dating gives plateau ages of 286.4 +/- 1.6 Ma, 297.0 +/- 2.6 Ma, 265.2 +/- 1.5 Ma, 178.8 +/- 1.0 Ma, 162.2 +/- 0.9 Ma, 237.7 +/- 1.3 Ma, 237.4 +/- 1.2 Ma and 231.9 +/- 1.2 Ma for the Talate (Li-Be-Nb-Ta), Baicheng (Nb-Ta), Kangmunagong (barren), Husite (Be), Qunkuer (Be-Nb-Ta), Xiaokalasu (Li-Nb-Ta), Weizigou (Be) and Taerlang (barren) pegmatites, respectively. These new ages coupled with previous geochronological work suggest that the REL pegmatites in the Chinese Altai formed during early Permain - Late Jurassic time. The REL pegmatites located in the Central Altaishan terrane are younger than those in the Qiongkuer-Abagong terrane, showing a correlation with the coeval and adjacent granites. The formation of the REL pegmatites and these granites indicates frequent and strong magmatic activity in the post-orogenic and anorogenic setting. The spatial and temporal distribution of pegmatites and granites reveals a magmatism path from the SE (of age early-middle Permian), to the NW (middle Permian - Middle Triassic) and finally to the central part (Middle Triassic - Jurassic) of the Chinese Altai.
WOS关键词NO. 3 PEGMATITE ; GRANITIC PEGMATITES ; CONTINENTAL GROWTH ; TECTONIC IMPLICATIONS ; NORTHWESTERN CHINA ; TRACE-ELEMENTS ; HF ISOTOPES ; HYDROTHERMAL EVOLUTION ; MINERAL CHEMISTRY ; SOUTHERN ALTAIDS
WOS研究方向Geology
语种英语
WOS记录号WOS:000431075800008
出版者CAMBRIDGE UNIV PRESS
资助机构key projects in the National Science and Technology Pillar Program(2011BAB06B03) ; key projects in the National Science and Technology Pillar Program(2011BAB06B03) ; Geology Survey second-level program of China Geological Survey(121201011000150003) ; Geology Survey second-level program of China Geological Survey(121201011000150003) ; key projects in the National Science and Technology Pillar Program(2011BAB06B03) ; key projects in the National Science and Technology Pillar Program(2011BAB06B03) ; Geology Survey second-level program of China Geological Survey(121201011000150003) ; Geology Survey second-level program of China Geological Survey(121201011000150003) ; key projects in the National Science and Technology Pillar Program(2011BAB06B03) ; key projects in the National Science and Technology Pillar Program(2011BAB06B03) ; Geology Survey second-level program of China Geological Survey(121201011000150003) ; Geology Survey second-level program of China Geological Survey(121201011000150003) ; key projects in the National Science and Technology Pillar Program(2011BAB06B03) ; key projects in the National Science and Technology Pillar Program(2011BAB06B03) ; Geology Survey second-level program of China Geological Survey(121201011000150003) ; Geology Survey second-level program of China Geological Survey(121201011000150003)
源URL[http://ir.iggcas.ac.cn/handle/132A11/88295]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Zhou, Qifeng; Qin, Kezhang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resource, Urumqi 830011, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Univ Ghana, Dept Earth Sci, POB LG 58, Legon, Ghana
推荐引用方式
GB/T 7714		 Zhou, Qifeng,Qin, Kezhang,Tang, Dongmei,et al. LA-ICP-MS U-Pb zircon, columbite-tantalite and Ar-40-Ar-39 muscovite age constraints for the rare-element pegmatite dykes in the Altai orogenic belt, NW China[J]. GEOLOGICAL MAGAZINE,2018,155(3):707-728.
APA Zhou, Qifeng,Qin, Kezhang,Tang, Dongmei,Wang, Chunlong,&Sakyi, Patrick Asamoah.(2018).LA-ICP-MS U-Pb zircon, columbite-tantalite and Ar-40-Ar-39 muscovite age constraints for the rare-element pegmatite dykes in the Altai orogenic belt, NW China.GEOLOGICAL MAGAZINE,155(3),707-728.
MLA Zhou, Qifeng,et al."LA-ICP-MS U-Pb zircon, columbite-tantalite and Ar-40-Ar-39 muscovite age constraints for the rare-element pegmatite dykes in the Altai orogenic belt, NW China".GEOLOGICAL MAGAZINE 155.3(2018):707-728.

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来源：地质与地球物理研究所

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