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Carboniferous mafic-ultramafic intrusions in the Eastern Pontides (Pulur Complex): Implications for the source of coeval voluminous granites

文献类型：期刊论文

作者Topuz, Gultekin4; Altherr, Rainer3; Candan, Osman2; Wang, Jia-Min1; Okay, Aral I.4; Wu, Fu-Yuan1; Ergen, Ali5; Zack, Thomas6; Siebel, Wolfgang7; Shangh, Cosmas K.8
刊名LITHOS
出版日期2023
卷号436-437页码:17
关键词Mafic-ultramafic intrusion Cumulate rock High-K calc-alkaline granite Isotopic dating Variscan orogeny Pulur Sakarya Zone Turkey High-volume magmatism
ISSN号0024-4937
DOI10.1016/j.lithos.2022.106946
英文摘要This study deals with the age and petrogenesis of mafic-ultramafic intrusions ranging in size from a few meters to 10 km within the Early Carboniferous high-grade gneisses of the Pulur Complex in the Eastern Pontides. The intrusions comprise dunite, wehrlite, gabbronorite, leucogabbro, anorthosite and ilmenite-bearing gabbronorite of cumulus origin, and are crosscut by dikes of ilmenite-bearing gabbronorite, leucogranite and microdiorite. U-Pb dating on zircons from gabbronorite, anorthosite and leucogranite yielded igneous crystallization ages of 322-326 Ma, indicating that the intrusions were emplaced ca. 5-7 Ma after the peak of high-grade meta-morphism, and form part of the Late Carboniferous high-volume magmatism in the region. In most cumulate rocks, Cr-Al spinel, olivine and plagioclase were early crystallizing phases, followed by orthopyroxene, clino-pyroxene and hornblende. Whole rock geochemical data suggest that wehrlite, gabbronorite, leucogabbro and anorthosite stem from a common magma, and ilmenite-bearing gabbronorite and dikes of leucogranite and microdiorite from different magmas. Application of mineral/melt partition coefficients to trace element com-positions of clinopyroxene and hornblende in cumulate rocks suggests that the main cumulate body was derived from middle-to high-K calc-alkaline basic melts, and relatively late ilmenite-bearing gabbronorites from hypersthene-normative Ca-rich melts. All the rock types display radiogenic Sr and Pb isotopic signatures, and unradiogenic Nd isotopic ratios, which are indistinguishable from those of the coeval voluminous high-K calc-alkaline I-type granites in the region; the isotopic ratios are probably related to the metasomatism of the lith-ospheric mantle by sediment-derived melts. We suggest that the parental melts of the mafic-ultramafic intrusions and those of the high-K calc-alkaline granites were genetically related, and melts of the high-K calc-alkaline granites were probably derived from the melting of newly underplated calc-alkaline basic material at lower crustal depths, that were compositionally comparable to the parental magmas of the mafic-ultramafic intrusions.
WOS关键词NE TURKEY CONSTRAINTS ; ISLAND-ARC ; CHROMIAN SPINEL ; TRACE-ELEMENT ; CALC-ALKALINE ; SUBDUCTED SEDIMENTS ; VOLCANIC-ROCKS ; HIGH-POTASSIUM ; NORTHERN PART ; SR-ND
资助项目Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg)[273] ; Turkish Academy of Science
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:001012248800001
出版者ELSEVIER
资助机构Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg) ; Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg) ; Turkish Academy of Science ; Turkish Academy of Science ; Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg) ; Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg) ; Turkish Academy of Science ; Turkish Academy of Science ; Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg) ; Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg) ; Turkish Academy of Science ; Turkish Academy of Science ; Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg) ; Deutsche Forschungsgemeinschaft (DFG- Graduiertenkolleg) ; Turkish Academy of Science ; Turkish Academy of Science
源URL[http://ir.iggcas.ac.cn/handle/132A11/111249]  
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Topuz, Gultekin
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
2.Dokuz Eylul Univ, Buca, Izmir, Turkiye
3.Heidelberg Univ, Inst Geowissensch, Neuenheimer Feld 234-236, D-69120 Heidelberg, Germany
4.Istanbul Tech Univ, Avrasya Yer Bilimleri Enstitusu, TR-34469 Istanbul, Turkiye
5.Jeoloji Etutleri Dairesi, Maden Tetkik Arama Gen Mudurlugu, TR-06800 Cankaya, Ankara, Turkiye
6.Univ Gothenburg, Dept Earth Sci, S-40530 Gothenburg, Sweden
7.Univ Freiburg Breisgau, Inst Geound Umweltnaturwissenschaften, Albertstr 23b, D-79104 Freiburg, Germany
8.Univ Tubingen, Inst Geowissensch Geochem, Wilhelmstr 56, D-72074 Tubingen, Germany
推荐引用方式
GB/T 7714		 Topuz, Gultekin,Altherr, Rainer,Candan, Osman,et al. Carboniferous mafic-ultramafic intrusions in the Eastern Pontides (Pulur Complex): Implications for the source of coeval voluminous granites[J]. LITHOS,2023,436-437:17.
APA Topuz, Gultekin.,Altherr, Rainer.,Candan, Osman.,Wang, Jia-Min.,Okay, Aral I..,...&Satir, Muharrem.(2023).Carboniferous mafic-ultramafic intrusions in the Eastern Pontides (Pulur Complex): Implications for the source of coeval voluminous granites.LITHOS,436-437,17.
MLA Topuz, Gultekin,et al."Carboniferous mafic-ultramafic intrusions in the Eastern Pontides (Pulur Complex): Implications for the source of coeval voluminous granites".LITHOS 436-437(2023):17.

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来源：地质与地球物理研究所

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