Document Details
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Document Type |
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Article In Journal |
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Document Title |
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The Lipt Alkali Granite Pluton,Kingdom Of Saudi Arabi : Geochemical And Sr-Nd Isotopic Inferences On The Petrogenesis of Rare Metal A-Type Granite بلتون جرانيت قلويّ ليبت، مملكة أراباي السّعوديّ : استنتاجات سر-ند الأحاديّة النّظيرة و كيميائيّة أرضيّة على بيتروجينيسيس المعدن النّادر جرانيت نوع |
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Subject |
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The Lipt Alkali Granite Pluton,Kingdom Of Saudi Arabi : Geochemical And Sr-Nd Isotopic Inferences On The Petrogenesis of Rare Metal A-Type Granite |
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Document Language |
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English |
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Abstract |
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The Lipt granite pluton, northern Asir terrain, Kingdom of Saudi Arabia intrudes a deformed syn~tectonic metavclcano-sedimentary association and l-type granodiorite intrusions emplaced at about 667 = 6 Ma The Lipt granite pluton is composed of monzogranite , muscovlte granne, porphyritic albite granite, and arfvedsonite-aegirinc albne granite, Field observations strongly suggest a ccmagmatic ongin of these granite varieties, Major.. trace, REEs and Sr-Nd isotope date, indicate that the rocks of the Lipt pluton are highly fractionated specialized peralkaline A•type granite with markedly enriched in rare metals (Sn, Nb, Ta, Y ~ Zrand REE), whole rock Rb-Sr dating gives ages of 559 :: 191 Ma for the monzograniteand 556 ± 7 Ma for the porphyritic albite granite. They have initial sr87 – sr86 ratio of 0,708 - 0,709 and relatively Low ' positive 3nd values (+0.39 •. +1.06). These isotopic. data indicate that the peralkaline Lipt granites can be Regarded as a mixture of old crustal and juvenile mantle-derived materials. The Nd model ages for the albite granite are mostly in the range 0,98•13 Ga suggesting .that the old crustal component is of a Middle Proterozoic age Fractional crystallization, involving fluorine complexing and fluid fractionation, played an Important role in evolution of the LIpt granite pluton and the associated mineralization's |
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ISSN |
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1319-0989 |
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Journal Name |
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Arts and Humanities Journal |
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Volume |
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43 |
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Issue Number |
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2 |
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Publishing Year |
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1424 AH
2004 AD |
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Article Type |
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Article |
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Added Date |
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Monday, February 7, 2011 |
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Researchers
| طلال القاضي | Qadi, Talal | Researcher | Doctorate | |
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