IGGCAS OpenIR  > 矿产资源研究院重点实验室
Late Devonian magmatic event in the South Beishan orogenic belt, Gansu: Constraints from zircon U-Pb chronology, geochemistry and Sr-Nd-Hf isotopes
Lu Xin1,2; Yu XiaoFei1,2; Du ZeZhong1,2; Kang Kai3; Du YiLun1,2; Wang ChunNu1,2
2022-03-01
Source PublicationACTA PETROLOGICA SINICA
ISSN1000-0569
Volume38Issue:3Pages:693-712
AbstractBeishan orogenic belt (BOB) is located on the southern margin of the Central Asian Orogenic Belt (CAOB). The study of magmatic events in BOB is of great significance for understanding the tectonic evolution of the CAOB. A large number of granitiod plutons are distributed in the south of BOB, where the Shuangyingshan and Huaniushan arcs are located. In this study, we focus on granodiorite and monzogranite from the south Shuangfengshan complex in the southern BOB. We present whole rock geochemistry, Sr-Nd isotopic composition, in situ U-Pb dating and Hf isotopic composition of zircons from this complex, from which the following results are obtained : (1) The granodiorites and monzogranites have similar zircon U-Pb chronology, whole rock geochemistry and isotopic composition. (2) Zircon LA-ICP-MS U-Pb dating yields ages of 367. 5 +/- 1. 7Ma and 368.0 +/- 1. 8Ma for the monzogranite, and 366. 3 +/- 2. 2Ma for the granodiorite, suggesting they were formed in the Late Devonian. (3) The SiO2 contents from samples collected in the complex are 64. 39% similar to 74. 95% , with alkali contents of 5. 01% similar to 9. 21% , suggesting it belongs to metaluminous (A/CNK = 0. 88 similar to 1. 00) ; the measured samples have low P2O5, contents (0. 02% similar to 0. 17% ) , which are negatively correlated to SiO2. These features indicated they are of typical I-type granite characteristics. (4) For the REE compositions, this complex is characterized by enriched light rare earth elements ( ( La/Yb)(N) = 6. 23 similar to 23. 0) , negative Eu anomaly (delta Eu = 0. 31 similar to 0. 55) , enriched large ion lithophile elements, such as Rb, Th, U, and depleted high field strength elements such as Nb, Ti, and P. (5) The complex has epsilon(Hf) (t) values of -3. 1 similar to + 6. 0, two stage model ages (t(DM2)) of 928 similar to 1327Ma, (Sr-87/Sr-86), values of 0. 705607 similar to 0. 708523 , and epsilon(Nd) ( t) values of -4. 1 similar to - 1. 9. Combined with the regional geology and tectonic environment, these data reveals that the south Shuangfengshan complex was formed in an active continental margin in Late Devonian, and during its evolution, the lower crust was partially melted by the underplating of mantle-derived magma and mixing with mantle-derived materials, which represented a northward subduction of the Liuyuan Ocean plate in the Late Devonian.
KeywordMagmatic Event Late Devonian Tectonic setting Beishan Orogenic belt Central Asian Orogenic Belt
DOI10.18654/1000-0569/2022.03.07
WOS KeywordTECTONIC IMPLICATIONS ; DISCRIMINATION ; GEOCHRONOLOGY ; PETROGENESIS ; GRANITES
Language英语
WOS Research AreaGeology
WOS SubjectGeology
WOS IDWOS:000780616600007
PublisherSCIENCE PRESS
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/105096
Collection矿产资源研究院重点实验室
Corresponding AuthorYu XiaoFei
Affiliation1.China Geol Survey, Dev & Res Ctr, Beijing 100037, Peoples R China
2.Minist Nat Resources, Mineral Explorat Tech Guidance Ctr, Beijing 100083, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
Recommended Citation
GB/T 7714
Lu Xin,Yu XiaoFei,Du ZeZhong,et al. Late Devonian magmatic event in the South Beishan orogenic belt, Gansu: Constraints from zircon U-Pb chronology, geochemistry and Sr-Nd-Hf isotopes[J]. ACTA PETROLOGICA SINICA,2022,38(3):693-712.
APA Lu Xin,Yu XiaoFei,Du ZeZhong,Kang Kai,Du YiLun,&Wang ChunNu.(2022).Late Devonian magmatic event in the South Beishan orogenic belt, Gansu: Constraints from zircon U-Pb chronology, geochemistry and Sr-Nd-Hf isotopes.ACTA PETROLOGICA SINICA,38(3),693-712.
MLA Lu Xin,et al."Late Devonian magmatic event in the South Beishan orogenic belt, Gansu: Constraints from zircon U-Pb chronology, geochemistry and Sr-Nd-Hf isotopes".ACTA PETROLOGICA SINICA 38.3(2022):693-712.
Files in This Item:
There are no files associated with this item.
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Lu Xin]'s Articles
[Yu XiaoFei]'s Articles
[Du ZeZhong]'s Articles
Baidu academic
Similar articles in Baidu academic
[Lu Xin]'s Articles
[Yu XiaoFei]'s Articles
[Du ZeZhong]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Lu Xin]'s Articles
[Yu XiaoFei]'s Articles
[Du ZeZhong]'s Articles
Terms of Use
No data!
Social Bookmark/Share
Add to CiteULike Add to Connotea Add to Del.icio.us Add to Digg Add to Reddit Add to Technorati
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.