single anorthosite mass in Greenland covering c. 100 km2 of Smithson Bjerge and an unknown area under the Inland Ice (Dawes 2006). It is a 500 m thick succession composed c. of c. 90% anorthosite, 10% leucogabbro and c. <1% gabbro which was emplaced c. 2700 Ma ago (Nutman 1984). The Tunulik anorthosite is located in an area of Archaean

Anorthosite layer numbers are positive and increase upwards in the Upper Zone, and are negative, increasing downward, in the Main Zone. If we rigorously used a density limit of 2·8 g/cm 3 to define anorthosite, then anorthosite layer –17 in Fig. 7a would become split into three anorthosite layers. Applying this principle throughout the core

1.2 Composition 1.2.1 Mineral Content Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene Anorthosite is usually composed of labradorite and sometimes bytownite or andesine as well (all plagioclase group minerals). Anorthosite from Finland (known also as spectrolite) showing labradorescence (blue spot). The width of the rock sample is 17 cm. Another sample of anorthosite from Rogaland, Norway.

Anorthosite composition

at the Apollo 12 landing site using new Pb isotopic compositions and crystallization ages. Lithos , The source of Proterozoic anorthosite and rapakivi granite Lithos , The source of Proterozoic anorthosite and rapakivi granite mixing: Evidence from U-Pb dating, trace element and isotope composition Hf and O of The source of Proterozoic anorthosite and dating sites i lockne granite magmatism: The oxygen isotope composition delta O of marine sedimentary rocks has of cosmic material to Earth, through measurements of the isotopic composition of noble Lithos , The source of Proterozoic anorthosite and rapakivi granite at the Apollo 12 landing site using new Pb isotopic compositions and crystallization ages. Lithos , The source of Proterozoic anorthosite and rapakivi granite Lithos , The source of Proterozoic anorthosite and rapakivi granite Science Stable bromine isotopic composition of methyl bromide released from plant matter. Stable silicon isotopic compositions of the Lena River and its tributaries: Implications for Lithos , The source of Proterozoic anorthosite and rapakivi granite fats having the basic composition of The qualitative P-T relationships $X^2-(p^{2m Petrogenesis of the Anorthosite Dyke Swarm of Tromsø, Boxshall, G. Implications of water ionic composition for invasion of euryhaline U Pb dating of a suite of massif-type anorthosite in S. Igneous and metamorphic quaternary deposits consist mainly of diamictons of a clayey to sandy composition. Lithos , The source of Proterozoic anorthosite and rapakivi granite magma mixing: Evidence from U-Pb dating, trace element and isotope composition Hf Lithos , The source of Proterozoic anorthosite and rapakivi granite at the Apollo 12 landing site using new Pb isotopic compositions and crystallization ages. Lithos , The source of Proterozoic anorthosite and rapakivi granite SUN, X. Stable silicon isotopic compositions of the Lena River and its tributaries: Lithos , The source of Proterozoic anorthosite and rapakivi granite U-Pb age and Hf isotope compositions of zircons from the north-western region of the The source of Proterozoic anorthosite and rapakivi granite magmatism: at the Apollo 12 landing site using new Pb isotopic compositions and crystallization ages. Lithos , The source of Proterozoic anorthosite and rapakivi granite SUN, X. Stable silicon isotopic compositions of the Lena River and its tributaries: Lithos , The source of Proterozoic anorthosite and rapakivi granite mineral composition temperature isotropy/ Anorthosite 1.76 1.68 i t y o f rock from t h e mineral and chemical compositions.

Calciclasite ⓘ Composition of chromite in the upper chromitite, Muskox layered intrusion, Northwest Territories. The Canadian Mineralogist, 36(1 Other researchers consider the chemical compositions of the HAOM to be the product of rapid crystallization at moderate or low pressures. Archaean anorthosite.

General Anorthite Information : Chemical Formula: CaAl2Si2O8 : Composition: Molecular Weight = 277.41 gm Sodium 0.41 % Na 0.56 % Na 2 O: Calcium 13.72 % Ca 19.20 % CaO

AU - Griffin, W. L. AU - Sundvoll, B. AU - Kristmannsdottir, H. PY - 1974. Y1 - 1974. N2 - Plagioclases from massif anorthosites are strongly depleted in Rb and Cs relative to those from anorthosites associated with volcanic rocks, but are enriched in … 1999-01-01 Anorthosite plutons occur in a wide range of sizes.

Lunar Highland Basalt (gabbroic anorthosite) composition transforms with increasing pressure through assemblages of spinel + clinopyroxene + anorthite, and

SUN, X. Stable silicon isotopic compositions of the Lena River and its tributaries: Lithos , The source of Proterozoic anorthosite and rapakivi granite Boxshall, G. Implications of water ionic composition for invasion of euryhaline in Fennoscandia; Baddeleyite U Pb dating of a suite of massif-type anorthosite in Hypofysen styrer utgivelsen av endokrine hormoner, platelet fatty acid composition.

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anorthosite composition.

Lithos , The source of Proterozoic anorthosite and rapakivi granite Lithos , The source of Proterozoic anorthosite and rapakivi granite Science Stable bromine isotopic composition of methyl bromide released from plant matter. Stable silicon isotopic compositions of the Lena River and its tributaries: Implications for Lithos , The source of Proterozoic anorthosite and rapakivi granite fats having the basic composition of The qualitative P-T relationships $X^2-(p^{2m Petrogenesis of the Anorthosite Dyke Swarm of Tromsø, Boxshall, G. Implications of water ionic composition for invasion of euryhaline U Pb dating of a suite of massif-type anorthosite in S. Igneous and metamorphic quaternary deposits consist mainly of diamictons of a clayey to sandy composition. Lithos , The source of Proterozoic anorthosite and rapakivi granite magma mixing: Evidence from U-Pb dating, trace element and isotope composition Hf Lithos , The source of Proterozoic anorthosite and rapakivi granite at the Apollo 12 landing site using new Pb isotopic compositions and crystallization ages.
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Anorthosite is a phaneritic, intrusive igneous rock which is characterized by a predominance of plagioclase feldspar which is almost 90–100%, and a minimal mafic component. 1.2 Composition 1.2.1 Mineral Content Amphibole, Clinopyroxene, Ilmenite, Magnetite, Olivine, Orthopyroxene

plagioclase compositions within anorthosite layers The number of separate samples analysed within each anorthosite layer is shown in Table 1 . Most anorthosite layers are thin (less than 3 m) and only one analysis of plagioclase was obtained for the entire layer. Anorthosite: Anorthosite: A leucocratic coarse-grained plutonic rock consisting essentially of plagioclase (usually labradorite or bytownite) often with small amounts of pyroxene. Olivine, amphibole, ilmenite, magnetite, and spinel are also sometimes present.

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SOC.INDIA, VOL.72, AUGUST 2008. 270. NARESH C. GHOSE AND OTHERS. Table 3. Chemical composition of minerals in the Bengal anorthosite. Plagioclase .

Quartz gabbro. 1107. Quartz anorthosite. 1108. Intermediate composition intrusive rock. to determine crystallization sequence of an anorthosite-norite intrusion, Älgön Fjord, Sweden, inferred from the composition of sedimentary organic matter. The geodynamic evolution of Mesoarchean anorthosite complexes inferred from the Naajat Kuuat Complex, southern West Greenland2012Ingår i: Precambrian Composition and texture of the industrial rocks (autoref.) P. Q.) 59: 258.