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Origin, tectonic environment and age of the Bibole banded iron formations, northwestern Congo Craton, Cameroon: geochemical and geochronological constraints

文献类型：期刊论文

作者Soh, Arlette Pulcherie Djoukouo1,2; Ganno, Sylvestre1; Zhang, Lianchang2,3; Tamehe, Landry Soh1,4; Wang, Changle2,3; Peng, Zidong2,3; Tong, Xiaoxue2,3; Nzenti, Jean Paul2
刊名GEOLOGICAL MAGAZINE
出版日期2021-12-01
卷号158期号:12页码:2245-2263
ISSN号0016-7568
关键词Geochemistry SIMS U-Pb dating Depositional environment Great Oxidation Event Bibole BIFs Congo Craton
DOI10.1017/S0016756821000765
英文摘要The newly discovered Bibole banded iron formations are located within the Nyong Group at the northwest of the Congo Craton in Cameroon. The Bibole banded iron formations comprise oxide (quartz-magnetite) and mixed oxide-silicate (chlorite-magnetite) facies banded iron formations, which are interbedded with felsic gneiss, phyllite and quartz-chlorite schist. Geochemical studies of the quartz-magnetite banded iron formations and chlorite-magnetite banded iron formations reveal that they are composed of >95 wt % Fe2O3 plus SiO2 and have low concentrations of Al2O3, TiO2 and high field strength elements. This indicates that the Bibole banded iron formations were not significantly contaminated by detrital materials. Post-Archaean Australian Shale-normalized rare earth element and yttrium patterns are characterized by positive La and Y anomalies, a relative depletion of light rare earth elements compared to heavy rare earth elements and positive Eu anomalies (average of 1.86 and 1.15 for the quartz-magnetite banded iron formations and chlorite-magnetite banded iron formations, respectively), suggesting the influence of low-temperature hydrothermal fluids and seawater. The quartz-magnetite banded iron formations display true negative Ce anomalies, while the chlorite-magnetite banded iron formations lack Ce anomalies. Combined with their distinct Eu anomalies consistent with Algoma- and Superior-type banded iron formations, we suggest that the Bibole banded iron formations were deposited under oxic to suboxic conditions in an extensional basin. SIMS U-Pb data indicate that the Bibole banded iron formations were deposited at 2466 Ma and experienced metamorphism and metasomatism at 2078 Ma during the Eburnean/Trans-Amazonian orogeny. Overall, these findings suggest that the studied banded iron formations probably marked the onset of the rise of atmospheric oxygen, also known as the Great Oxidation Event in the Congo Craton.
WOS关键词RARE-EARTH-ELEMENT ; PALAEOPROTEROZOIC NYONG SERIES ; SAO FRANCISCO CRATON ; GREENSTONE-BELT ; U-PB ; TRANSVAAL SUPERGROUP ; CHEMICAL-COMPOSITION ; SOUTHERN CAMEROON ; SUPRACRUSTAL BELT ; THERMAL HISTORY
资助项目Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China[KLMR2017-02] ; Organization for Women in Science for the Developing World (OWSD)
WOS研究方向Geology
语种英语
出版者CAMBRIDGE UNIV PRESS
WOS记录号WOS:000717139300011
资助机构Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Open Research Project of Key Laboratory of Mineral Resources, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing, China ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD) ; Organization for Women in Science for the Developing World (OWSD)
源URL[http://ir.iggcas.ac.cn/handle/132A11/103824]  
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Ganno, Sylvestre
作者单位1.Univ Yaounde I, Dept Earth Sci, POB 812, Yaounde, Cameroon
2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
3.Chinese Acad Sci, Innovat Acad Earth Sci, Beijing 100029, Peoples R China
4.Cent South Univ, Sch Geosci & Info Phys, Changsha 410083, Peoples R China
推荐引用方式
GB/T 7714		 Soh, Arlette Pulcherie Djoukouo,Ganno, Sylvestre,Zhang, Lianchang,et al. Origin, tectonic environment and age of the Bibole banded iron formations, northwestern Congo Craton, Cameroon: geochemical and geochronological constraints[J]. GEOLOGICAL MAGAZINE,2021,158(12):2245-2263.
APA Soh, Arlette Pulcherie Djoukouo.,Ganno, Sylvestre.,Zhang, Lianchang.,Tamehe, Landry Soh.,Wang, Changle.,...&Nzenti, Jean Paul.(2021).Origin, tectonic environment and age of the Bibole banded iron formations, northwestern Congo Craton, Cameroon: geochemical and geochronological constraints.GEOLOGICAL MAGAZINE,158(12),2245-2263.
MLA Soh, Arlette Pulcherie Djoukouo,et al."Origin, tectonic environment and age of the Bibole banded iron formations, northwestern Congo Craton, Cameroon: geochemical and geochronological constraints".GEOLOGICAL MAGAZINE 158.12(2021):2245-2263.

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