Many of the gneisses in such areas were largely of mixed aspect, with bands of metamorphic rock interleaved with others of more granitic nature. |
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Metamorphic aureoles around the granitic rocks are estimated to extend on the order of 1 km from the granitic rocks. |
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There are no mafic dykes or intrusions of similar age to the granitic rocks that could imply contemporaneous mafic magmatism. |
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In contrast, granitic pegmatites are found in the Zomba Mountain and Malosa Mountain. |
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These domes are composed of pelitic schists and gneisses folded around a core of K-feldspar granite and granitic gneiss. |
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This magmatism is typically of gabbroic to granitic composition and also shows evidence of mixed sedimentary and mantle-like sources. |
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In Yakushima, granitic and sedimentary boulders are cracked polygonally on their surface. |
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Numerous undated granitic and dioritic plutons intrude the Palaeozoic rocks and form large areas of Karlik Tagh and Barkol Tagh. |
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Is there any petrologic or petrographic evidence that granitic magmas have been extracted in timescales of only decades or centuries? |
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It has also been found as a constituent of granites and in granitic pegmatites. |
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In the central part of the intrusion, some small granitic aplite dykes intrude the syenitic rocks. |
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They are characteristic of the granitic uplands or moors of south-western England and of other Hercynian massifs in western and central Europe. |
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We agree with Leong that a complex basement composed of both ophiolitic and granitic crust underlies much of Sabah. |
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The pennywort, also called navelwort, is commonly found on European granitic lands, especially in wall and rock crevices. |
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Garnets are common accessory minerals in granitic pegmatites and are typically members of the spessartine-almandine solid-solution series. |
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This mineralogy is consistent with derivation from granitic or acidic high-grade metamorphic rocks. |
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Interestingly, high-temperature melting experiments have shown similar peritectic assemblages coexisting with granitic melt. |
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They probably represent the time of igneous emplacement of the granitic source rocks. |
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Most of the granitic plutons that make up this part of the batholith are characterized by upright magmatic-state planar fabrics trending NE with shallow lineations. |
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We interpret these grains as xenocrysts from an older source terrain from which the granitic protolith of sample MS 3 may have been derived by anatectic melting. |
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The chief commodity sought is tin, as fine-grained cassiterite in vein swarms related to the emplacement of granitic rocks within sedimentary carbonates. |
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Apatite is the most common phosphate mineral found in granitic pegmatites. |
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The Snieznik and Gierahow gneisses have granitic compositions. |
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A common misconception is that a pegmatite is granitic in composition. |
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The product may vary from a homogeneous rock produced by soaking to a coarsely mixed rock easily separable into relic and granitic or granitised portions. |
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The dark green color of the emerald required chromium, an element not normally found in granitic pegmatites but often in good supply in ultramafics. |
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The drill hole encountered fractured granitic basement with pegmatitic lenses. |
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These units were later intruded by Pan-African granitic rocks of adammellitic and pegmatitic varieties. |
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Distribution and petrogenetic behaviour of trace elements in granitic pegmatite quartz from South Norway. |
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The rare earth mineralization, consisting of fergusonite, allanite, and zircon, occurs in amphibole bearing granitic pegmatites. |
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Samples of outcropping granite and dolerite and of granitic and doleritic saprolite were collected from Jarrahdale railway cutting. |
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Small dikes of granitic composition called aplites are often associated with the margins of granitic intrusions. |
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The interior of the main continental landmass includes an extensive granitic core called a craton. |
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The Lewisian consists mainly of granitic gneisses with a minor amount of supracrustal rocks. |
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Petrological studies show potassic metasomatism and localised hydrothermal alteration within the granitic host rocks. |
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Monocrystalline quartz grains are usually associated with derivation from granitic gneiss and recrystallised metaquartzite. |
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The exhibit's centerpiece, a 340-ton, two-story-tall granitic rock, is supported above a subterranean ramp at the La Brea Tar Pits. |
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No less than sixty 105 mm rounds were necessary to atomise the granitic enemy. |
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The dominant rocks are biotite schist, granitic gnesis, garnetiferous amphibolite and quartzite. |
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A batholith is formed when many plutons converge to form a huge expanse of granitic rock. |
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In some cases granitic bodies have been recognised from the mineralization above them, even if the intrusion itself has not been encountered. |
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The protolith for the Scourian gneisses are thought to be granitic, with subsidiary mafic and ultramafic plutonic rocks giving an overall bimodal character. |
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One such batholith is the Sierra Nevada Batholith, which is a continuous granitic formation that makes up much of the Sierra Nevada in California. |
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A granitic rock with a porphyritic texture is known as a granite porphyry. |
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Some new definitions of the term 'LIP' include large granitic provinces such as those found in the Andes Mountains of South America and in western North America. |
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Lewisian like granitic gneisses of Paleoproterozoic age of the Rhinns complex are exposed on Islay and Colonsay in the southern part of the Inner Hebrides. |
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Minor granitic intrusions are present throughout the peninsula. |
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Therefore, granitic rocks form the basement of all land continents. |
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For instance, a magma of gabbroic composition can produce a residual melt of granitic composition if early formed crystals are separated from the magma. |
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