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- W2015762666 abstract "Abstract The Dineibit El-Qulieb Leucogranite exhibits most features of l-type granitoids (calc-alkaline affinity, relatively high Na2O, moderate values of Rb, Ba, LREE, Rb/Sr and low Rb/Ba with the presence of magnetite and titanite as the main accessories). On the other hand, they possess hyperaluminous (molar A/CNK = 1.22−1.43) and high normative corundum (∼ 5%), which are in contrast to typical l-type granitoids. The REE patterns are characterised by fractionated LREE and relatively flat HREE with pronounced negative Eu anomalies. The investigated rocks have low K/Rb and high Zr/Y ratios reflecting a typical mature continentalarc environment. The absence of recrystallised phases and the undepleted and flat HREE of the Dineibit El-Qulieb Leucogranite pattern argue against its formation by partial melting of crustal materials. Based on the petrological and geochemical features, the Dineibit El-Qulieb Leucogranite can be generated by fractional crystallisation of mafic magma. The Qulieb leucogranites are characterised by LILE enrichment, normative corundum-rich, strongly peraluminous compositions and associated with miarolitic cavities and pegmatitic patches suggesting the role of the aqueous fluids released from the downgoing slab during subduction. The main fractionating phases were hornblende, biotite, plagioclase and alkali feldspars. Based on the modelling of major elements, the least differentiated adamellite sample requires 91% crystal fractionation, mainly of hornblende, plagioclase, K-feldspar and biotite, from dioritic liquid. On the other hand, the most felsic investigated adamellite sample can be generated by 29% fractional crystallisation of plagioclase, K-feldspar and biotite from the most basic adamellite sample." @default.
- W2015762666 created "2016-06-24" @default.
- W2015762666 creator A5004477128 @default.
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- W2015762666 date "1999-04-01" @default.
- W2015762666 modified "2023-10-18" @default.
- W2015762666 title "Petrogenesis and evolution of the Dineibit El-Qulieb hyperaluminous leucogranite, Southeastern Desert, Egypt: petrological and geochemical constraints" @default.
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- W2015762666 doi "https://doi.org/10.1016/s0899-5362(99)00040-8" @default.
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