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Geochronology, geochemistry and tectonic implications of Variscan granitic and dioritic rocks from the Odenwald-Spessart basement, Germany

文献类型：期刊论文

作者Will, Thomas M.1; Schmadicke, Esther2; Ling, Xiao-Xiao3; Li, Xian-Hua3; Li, Qiu-Li3
刊名LITHOS
出版日期2021-12-01
卷号404-405页码:27
关键词Variscan orogen Odenwald-Spessart basement U-Pb-Hf-O zircon isotope data Cadomia Mantle plume
ISSN号0024-4937
DOI10.1016/j.lithos.2021.106454
英文摘要New zircon U-Pb-Hf-O isotope, whole rock geochemical and Sr-Nd-Pb isotope geochemical data of Variscan felsic to intermediate rocks from the Odenwald-Spessart basement, Mid-German Crystalline Zone, Germany are presented. Peraluminous, high-K calc-alkaline S-type granite in the eastern Odenwald basement (Group 1 rocks) formed by partial melting of the lower crust at c. 425 Ma. Their high-K calc-alkaline composition indicates the presence of sedimentary and/or metasomatized lithospheric mantle material during formation of the melts. The protolithic melts of metaluminous, medium-to high-K calc-alkaline I-type granodiorite and diorite of the Spessart and western Odenwald basement as well as the Neustadt (Odenwald) outlier (Group 2 rocks) formed by partial melting of the upper mantle at c. 340 Ma. The melt source was enriched through previously subducted Mesoproterozoic sedimentary material. Eastern Odenwald basement leucocratic gneiss have zircon with ages ranging from 2803 Ma to 336 Ma and main age peaks between 620 and 570 Ma and 360 and 330 Ma. The presence of numerous >1800 Ma old zircon and a prominent age gap between 1800 and 1000 Ma imply a Gondwanan zircon source and indicate the presence of Cadomian material in the Odenwald-Spessart basement. Group 2 diorite is exposed over a distance of at least 60 km from the easternmost Spessart to the westernmost Odenwald and is expected to underlie the eastern Odenwald basement. We suggest that Group 2 diorite formation was related to the presence of a mantle plume, which was also responsible for the widespread Carboniferous magmatism and the associated high-temperature metamorphism in the Odenwald-Spessart basement and other areas of the Variscan orogen.
WOS关键词HIGH-PRESSURE METAMORPHISM ; CRYSTALLINE COMPLEX ; U-PB ; BOLLSTEIN ODENWALD ; MAGMATIC ARC ; SW GERMANY ; EVOLUTION ; CONSTRAINTS ; ZONE ; AGES
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000702764000003
出版者ELSEVIER
源URL[http://ir.iggcas.ac.cn/handle/132A11/102691]  
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Will, Thomas M.
作者单位1.Univ Wurzburg, Inst Geog & Geol, D-97074 Wurzburg, Germany
2.Univ Erlangen Nurnberg, Geozentrum Nordbayern, Schlossgarten 5a, D-91054 Erlangen, Germany
3.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		 Will, Thomas M.,Schmadicke, Esther,Ling, Xiao-Xiao,et al. Geochronology, geochemistry and tectonic implications of Variscan granitic and dioritic rocks from the Odenwald-Spessart basement, Germany[J]. LITHOS,2021,404-405:27.
APA Will, Thomas M.,Schmadicke, Esther,Ling, Xiao-Xiao,Li, Xian-Hua,&Li, Qiu-Li.(2021).Geochronology, geochemistry and tectonic implications of Variscan granitic and dioritic rocks from the Odenwald-Spessart basement, Germany.LITHOS,404-405,27.
MLA Will, Thomas M.,et al."Geochronology, geochemistry and tectonic implications of Variscan granitic and dioritic rocks from the Odenwald-Spessart basement, Germany".LITHOS 404-405(2021):27.

入库方式： OAI收割

来源：地质与地球物理研究所

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