- منطقة بودونغ الجديدة ، شنغهاي ، الصين .
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Unfortunately, unification quickly turned sour between North and South Yemen, leading to instability and conflict in both countries. Although initially promising to share power, Yemeni President Ali Abdullah Saleh marginalized Southern leaders from the PDRY and rewarded his supporters with land and resources taken from South Yemen. …
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An integrated investigation of field geology, mineral textures and compositions of minerals and host granites demonstrated that a large volume of metals were likely remobilized and redistributed during hydrothermal replacement, subsolidus re-equilibration and hydrothermal alteration, in addition to magma fractionation, which was …
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The projects, previously unexplored for lithium, were selected based on their prime location in Minas Gerais' Lithium Valley. Key characteristics include proximity to G4 granites, known lithium deposits, pegmatites, and lithium pathfinder minerals like tourmaline and beryl, as well as the presence of artisanal mining and leucogranites.
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Tin granites are generally peraluminous and ilmenite-bearing (Lehmann and Mahawat, 1989, Linnen and Cuney, 2005). However, granites related to tin mineralization in the western Nanling Range (South China) are distinctly metaluminous and contain magnetite as the dominant Fe–Ti oxide phase.
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The Wangjiazhuang granitic pluton is located in the central Zanhuang Domain, the central part of the North China Craton, which is mainly composed of biotite monzogranite with few mafic microgranular enclaves. Biotite is an important ferromagnesian mineral in most of the intermediatefelsic igneous rocks, and its mineral chemistry can …
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The origins of mafic mineral clots and microgranular enclaves in Mesoproterozoic granites were investigated in a case study of felsic A-type Hiltaba Suite granites from the Gawler Craton, South Australia. Mafic mineral clots display interlocked textures comprising plagioclase, amphibole, biotite, apatite and magnetite and occur …
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Petrogenetic relationships between peraluminous granites and Li- Cs-Ta rich pegmatites in south Issia zone (Central-West of Côte d'Ivoire): Petrography, Mineralogy, Geochemistry and zircon U–Pb Geochronology ... LCT pegmatite about 2 km to North West from the Issia granite and those are probably at the origin of the coltan minerals ...
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Miocene-Oligocene A-type granite intrudes the eastern side of the Red Sea margin within the zone of extension from Jiddah, Saudi Arabia south to Yemen. The intrusions developed in the early stages of continental extension as Arabia began to move slowly away from Africa (around 30-20 Ma). Within the narrow zone of extension silicic …
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The Kharir oilfield in Yemen contains proven ... Ran, T. Study on correlation between mineral composition and permeability characteristics of weathered granite. J. North China Univ. Water Resour. ... "Characteristics and Genetic Mechanism of Granite Weathering Crust of Songnan Low Uplift, Qiongdongnan Basin, South China Sea" …
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These "Grenvillian" S-type granites from the North Qinling unit were possibly formed in an accretionary orogen through which the North Qinling unit, together with the adjacent South China Block, was amalgamated into Rodinia supercontinent.
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Paleoproterozoic A-type granites are widely outcropped in the North China Craton (NCC), particularly in the Trans-North China Orogen. However, their genesis and tectonic significance remain obscure. Here we report systematic studies on geochronology and geochemical characteristics of A-type granite in Huayangchuan, south margin of …
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The properties of the Caledonian orogeny along the transition belt of the Yangtze and Cathaysia blocks have received much attention in recent years. The widespread Early Paleozoic granites provide critical geological clues for unraveling the tectonic evolution and geodynamic processes of the South China Continent (SCC). …
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A comprehensive whole-rock geochemical and mineral chemistry study was carried out of granites from the Narnaul and surrounding isolated hills of North Delhi Mobile Belt, NW India to constrain their genesis, and tectonic environment.The distinctive features of granites are meta to peraluminous nature and decreasing trend of P 2 O 5 with high SiO 2
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The Precambrian basement of northern Yemen was first divided by Geukens ( 1960, 1966) into three units: mica-schist with granite intrusions in the southeast, granite with rafts of gneisses and mica-schist in the centre, and chlorite ± garnet-schist and gneissic quartzite in the …
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