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Evidence for a 2.06 Ga subduction at the western border of the Adamawa-Yade domain in Cameroon: Constraints from elemental geochemistry, zircon Hf isotopes and zircon U/Pb geochronology from Ititin metabasites

文献类型：期刊论文

作者Tchouankoue, Jean Pierre2; Tchaptchet, De Pesquidoux I. Tchato2; Nyassa, Liliane Madeleine2; Njuinang, Joseline Dieugnou2; Feudjou, Celine Maffo2; Tchato, Clauter Fils2; Ngambi, Pauline Edwige Bikes2; Li, Xian-Hua1,3
刊名JOURNAL OF AFRICAN EARTH SCIENCES
出版日期2021-03-01
卷号175页码:11
关键词Metabasites Continental arc West central Africa fold belt Cameroon
ISSN号1464-343X
DOI10.1016/j.jafrearsci.2020.104001
英文摘要The geodynamic significance of Adamawa Yade Domain in Cameroon is still highly debated. This paper presents mineralogical, geochemical, zircon U-Pb age and Hf isotopic data for NNE-trending garnet-bearing pyroxeno-amphibolite (GPAm) and amphibolite (Am) bodies exposed in the Ititin area located at the Northwestern border of the Adamawa-Yade domain in Cameroon. The GPAm and Am were dated by SIMS U-Pb zircon methods and yielded upper and lower intercept ages of 2065 +/- 30 Ma and 557 +/- 29 Ma, and 2054 +/- 40Ma and 803 +/- 320Ma, respectively. In the primitive mantle-normalized trace elements pattern, the metabasites display spike-like pattern, with enrichment in Th and La, and depletion in Nb, Zr, Hf, P and Ti although lower abundances are recorded in GPAm. GPAm yielded Hf-176/Hf-177 initial ratios (0.281243 to 0.281491) with epsilon(Hf) (2.06Ga) values of -9.7 to 0.7 whereas the Am display Hf-176/Hf-177 initial ratios (0.281143-0.281206) with values of epsilon(Hf) (t) of -12.2 to 9.8. Geochemistry and geochronological data suggest that GPAm and Am originated from a subduction - modified lithospheric mantle and were emplaced at 2.06 Ga in a continental arc setting during the Paleoproterozoic event that formed the West Central Africa Fold Belt. Both the GPAm and Am were subsequently overprinted by the Pan-African orogeny.
资助项目IMP-ETH Zurich ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Brazilian CNPq Science Without Borders Programs[303672/2014-5] ; National Natural Science Foundation of China[41890831] ; State Key Laboratory of Lithospheric Evolution, IGG-CAS
WOS研究方向Geology
语种英语
WOS记录号WOS:000629493900001
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构IMP-ETH Zurich ; IMP-ETH Zurich ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Brazilian CNPq Science Without Borders Programs ; Brazilian CNPq Science Without Borders Programs ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, IGG-CAS ; State Key Laboratory of Lithospheric Evolution, IGG-CAS ; IMP-ETH Zurich ; IMP-ETH Zurich ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Brazilian CNPq Science Without Borders Programs ; Brazilian CNPq Science Without Borders Programs ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, IGG-CAS ; State Key Laboratory of Lithospheric Evolution, IGG-CAS ; IMP-ETH Zurich ; IMP-ETH Zurich ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Brazilian CNPq Science Without Borders Programs ; Brazilian CNPq Science Without Borders Programs ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, IGG-CAS ; State Key Laboratory of Lithospheric Evolution, IGG-CAS ; IMP-ETH Zurich ; IMP-ETH Zurich ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Academy of Sciences for Developing World/Chinese Academy of Sciences (CAS/TWAS) ; Brazilian CNPq Science Without Borders Programs ; Brazilian CNPq Science Without Borders Programs ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Lithospheric Evolution, IGG-CAS ; State Key Laboratory of Lithospheric Evolution, IGG-CAS
源URL[http://ir.iggcas.ac.cn/handle/132A11/101040]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Tchouankoue, Jean Pierre
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Univ Yaounde I, Dept Earth Sci, POB 812, Yaounde, Cameroon
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100026, Peoples R China
推荐引用方式
GB/T 7714		 Tchouankoue, Jean Pierre,Tchaptchet, De Pesquidoux I. Tchato,Nyassa, Liliane Madeleine,et al. Evidence for a 2.06 Ga subduction at the western border of the Adamawa-Yade domain in Cameroon: Constraints from elemental geochemistry, zircon Hf isotopes and zircon U/Pb geochronology from Ititin metabasites[J]. JOURNAL OF AFRICAN EARTH SCIENCES,2021,175:11.
APA Tchouankoue, Jean Pierre.,Tchaptchet, De Pesquidoux I. Tchato.,Nyassa, Liliane Madeleine.,Njuinang, Joseline Dieugnou.,Feudjou, Celine Maffo.,...&Li, Xian-Hua.(2021).Evidence for a 2.06 Ga subduction at the western border of the Adamawa-Yade domain in Cameroon: Constraints from elemental geochemistry, zircon Hf isotopes and zircon U/Pb geochronology from Ititin metabasites.JOURNAL OF AFRICAN EARTH SCIENCES,175,11.
MLA Tchouankoue, Jean Pierre,et al."Evidence for a 2.06 Ga subduction at the western border of the Adamawa-Yade domain in Cameroon: Constraints from elemental geochemistry, zircon Hf isotopes and zircon U/Pb geochronology from Ititin metabasites".JOURNAL OF AFRICAN EARTH SCIENCES 175(2021):11.

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来源：地质与地球物理研究所

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