Ar-40/Ar-39 dating of basaltic dykes swarm in Western Cameroon: Evidence of Late Paleozoic and Mesozoic magmatism in the corridor of the Cameroon Line
文献类型：期刊论文
| 作者 | Tchouankoue, Jean Pierre1,4; Wambo, Nicole Armelle Simeni2; Dongmo, Armand Kagou3; Li, Xian-Hua4 |
| 刊名 | JOURNAL OF AFRICAN EARTH SCIENCES
 |
| 出版日期 | 2014-05-01 |
| 卷号 | 93页码:14-22 |
| 关键词 | Cameroon Basalt dykes Paleozoic Mesozoic Cameroon Line West Gondwana |
| ISSN号 | 1464-343X |
| DOI | 10.1016/j.jafrearsci.2014.01.006 |
| 文献子类 | Article |
| 英文摘要 | Ar-40/Ar-39 ages of three basalt dykes that intrude the Precambrian basement in the southern continental part of the Cretaceous Cameroon Line are presented. Specimen were sampled at Dschang, Maham and Kendem (Cameroon). The ages obtained are 421.3 +/- 3.5 Ma (Dschang), 404.22 +/- 3.51 Ma (Maham), and 192.10 +/- 7.45 Ma (Kendem). The Dschang and Maham samples yield a relatively undisturbed spectrum while the Kendem sample shows an excess of argon but with plateau ages in the frame of the Mesozoic. Plateau ages at Dschang, Maham and Kendem represent more than 80% of the total Ar-39 released and are interpreted as emplacement ages. Ar-40/Ar-39 dating results confirm Devonian and Jurassic K/Ar ages obtained from similar dykes of the same region. Geochemically, the basalt dykes are subalkaline in composition with 45-50 wt.% SiO2. Incompatible trace elements and rare earth elements are lower than that of the Cameroon Line basalts. Overall geochemical characteristics of the basalt dykes much more closely resemble those of tholeiites of the Benue Through in Nigeria that are interpreted as related to the opening of the Atlantic Ocean. The combination of Ar-40/Ar-39 ages, major, trace and rare earth elements geochemistry data demonstrate a magmatic phase that is significantly older and different of that of the Cretaceous Cameroon Line and younger than the dominantly granitic Neoproterozoic to early Paleozoic magmatism in the region. These findings offer new clues for a better understanding of the tectonic history of the region, particularly the origin of the Cameroon Line and Africa-South America pre-drift reconstitutions. (C) 2014 Elsevier Ltd. All rights reserved. |
| WOS关键词 | VOLCANIC-ROCKS ; CENTRAL-AFRICA ; CHEMICAL CLASSIFICATION ; GEOCHRONOLOGY ; PROVINCE ; EPISODE ; NIGERIA ; MASSIF ; BELT ; AGES |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000336341900002 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 资助机构 | World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; IGG-CAS ; IGG-CAS ; IGG-CAS ; IGG-CAS ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; IGG-CAS ; IGG-CAS ; IGG-CAS ; IGG-CAS ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; IGG-CAS ; IGG-CAS ; IGG-CAS ; IGG-CAS ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; World Academy of Sciences (TWAS)/Chinese Academy of Sciences (CAS) fellowship ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; State Key Laboratory of Lithospheric Evolution ; IGG-CAS ; IGG-CAS ; IGG-CAS ; IGG-CAS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/85392]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Tchouankoue, Jean Pierre |
| 作者单位 | 1.Univ Yaounde I, Dept Earth Sci, Yaounde, Cameroon 2.Univ Ngaoundere, Dept Earth Sci, Ngaoundere, Cameroon 3.Univ Dschang, Dept Earth Sci, Dschang, Cameroon 4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Tchouankoue, Jean Pierre,Wambo, Nicole Armelle Simeni,Dongmo, Armand Kagou,et al. Ar-40/Ar-39 dating of basaltic dykes swarm in Western Cameroon: Evidence of Late Paleozoic and Mesozoic magmatism in the corridor of the Cameroon Line[J]. JOURNAL OF AFRICAN EARTH SCIENCES,2014,93:14-22. |
| APA | Tchouankoue, Jean Pierre,Wambo, Nicole Armelle Simeni,Dongmo, Armand Kagou,&Li, Xian-Hua.(2014).Ar-40/Ar-39 dating of basaltic dykes swarm in Western Cameroon: Evidence of Late Paleozoic and Mesozoic magmatism in the corridor of the Cameroon Line.JOURNAL OF AFRICAN EARTH SCIENCES,93,14-22. |
| MLA | Tchouankoue, Jean Pierre,et al."Ar-40/Ar-39 dating of basaltic dykes swarm in Western Cameroon: Evidence of Late Paleozoic and Mesozoic magmatism in the corridor of the Cameroon Line".JOURNAL OF AFRICAN EARTH SCIENCES 93(2014):14-22. |
入库方式： OAI收割
来源：地质与地球物理研究所
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