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DOI | 10.1007/s12517-018-4051-z |
Petrogenesis and evolution of the Nuweibi rare-metal granite, Central Eastern Desert, Egypt | |
Emam, Ashraf1; Zoheir, Basem2,3; Radwan, Abdelhady Mohammed1,4; Lehmann, Bernd4; Zhang, Rongqing5; Fawzy, Sherif1; Nolte, Nicole6 | |
通讯作者 | Radwan, Abdelhady Mohammed |
来源期刊 | ARABIAN JOURNAL OF GEOSCIENCES |
ISSN | 1866-7511 |
EISSN | 1866-7538 |
出版年 | 2018 |
卷号 | 11期号:23 |
英文摘要 | The Nuweibi rare-metal granite in the Central Eastern Desert of Egypt is highly evolved fine- to medium-grained leucogranite affected by pervasive albitization and greisenization. The intrusion holds an important tin-tantalum resource in the Egyptian Eastern Desert. Columbite-tantalite and cassiterite disseminations occur within the granite body, while the quartz +/- feldspar veins cutting across the Nuweibi granite host only cassiterite disseminations. Microscopically, quartz and alkali-feldspar are the essential mineral constituents of Nuweibi granite, with minor mica (muscovite + rare biotite), while cassiterite, columbite-tantalite, zircon, allanite, beryl, tourmaline, titanite, and fluorite are accessories. Whole-rock geochemistry and micoanalytical data together with laser ablation inductively coupled plasma mass spectrometer (LA-ICP-MS) dating of zircon and columbite have been used to constrain the evolution of the granite intrusion and associated mineralization. The Nuweibi granite is weakly peraluminous with extremely low MgO, CaO, TiO2, P2O5, Ba, and Sr contents and elevated Sn, Ta, Nb, and Rb contents. The REE patterns exhibit distinct tetrad effects, as well as negative Eu and Y anomalies. Also, the bulk rock Zr/Hf ratios are consistently <10. The Nd isotopic system is disturbed and epsilon(Nd) values suggest a juvenile mantle and/or Neoproterozoic crustal source. The U-Pb system in zircon is disturbed and leaked continuously, while the U-Pb age of columbite is 620Ma. The geochemical and isotopic systematics of the Nuweibi intrusion reflect very advanced degree of fractionation combined with late magmatic fluid overprint which redistributed Sn and other mobile elements, while Ta still characterizes the igneous system. |
英文关键词 | Nuweibi Rare-metal granite Isotopic dating Tin-tantalum |
类型 | Article |
语种 | 英语 |
国家 | Egypt ; Germany ; Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000451673600002 |
WOS关键词 | A-TYPE GRANITES ; U-PB GEOCHRONOLOGY ; CORE COMPLEX ; ZIRCON AGES ; GEOCHEMICAL CHARACTERISTICS ; HYDROTHERMAL ALTERATION ; AFRICAN OROGEN ; TRACE-ELEMENTS ; ALBITE GRANITE ; SR |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/207782 |
作者单位 | 1.Aswan Univ, Dept Geol, Fac Sci, Aswan 81528, Egypt; 2.Benha Univ, Dept Geol, Fac Sci, Banha 13518, Egypt; 3.Univ Kiel, Inst Geosci, Ludewig Meyn Str 10, D-24118 Kiel, Germany; 4.Tech Univ Clausthal, Mineral Resources, D-38678 Clausthal Zellerfeld, Germany; 5.Chinese Acad Sci, CAS Key Lab Mineral & Metallogeny, Guangzhou 510640, Guangdong, Peoples R China; 6.Geosci Ctr Gottingen, Isotope Geol, D-337077 Gottingen, Germany |
推荐引用方式 GB/T 7714 | Emam, Ashraf,Zoheir, Basem,Radwan, Abdelhady Mohammed,et al. Petrogenesis and evolution of the Nuweibi rare-metal granite, Central Eastern Desert, Egypt[J],2018,11(23). |
APA | Emam, Ashraf.,Zoheir, Basem.,Radwan, Abdelhady Mohammed.,Lehmann, Bernd.,Zhang, Rongqing.,...&Nolte, Nicole.(2018).Petrogenesis and evolution of the Nuweibi rare-metal granite, Central Eastern Desert, Egypt.ARABIAN JOURNAL OF GEOSCIENCES,11(23). |
MLA | Emam, Ashraf,et al."Petrogenesis and evolution of the Nuweibi rare-metal granite, Central Eastern Desert, Egypt".ARABIAN JOURNAL OF GEOSCIENCES 11.23(2018). |
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