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TRACE ELEMENT COMPOSITION OF GARNET AS A TOOL TO DISTINGUISH PEGMATITE FAMILIES MITCHELL Nicholas and HEIMANN Adriana Department of Geological Sciences East Carolina University
·Pegmatite hosted garnet s from four locali ties in the Borouj erd region Lore stan W estern Ir an have been an alysed for major an d ken into frag ments using a ja w crusher coned and qu
·Two generations of garnet are recognized in a granite and a pegmatite from the Gangdese orogen in southeastern Tibet on the basis of a combined study of petrography major and trace element
DOI /00206819009465842 Corpus ID 128891265; GARNETS AS INDICATORS OF THE PHYSICOCHEMICAL CONDITIONS OF PEGMATITE FORMATION article{Sokolov1990GARNETSAI title={GARNETS AS INDICATORS OF THE PHYSICOCHEMICAL CONDITIONS OF PEGMATITE FORMATION} author={Yu M Sokolov
·Compositional evolution of grossular garnet from leucotonalitic pegmatite at Ruda nad Moravou Czech Republic; a complex EMPA LA ICP MS IR and CL study Mineralogy and Petrology Vol 107 Issue 2 p
·The Mn content of garnet in pegmatite stage are positively related to the magmatic evolution garnet with high Mn content MnO>% is a sign of highly fractionated and mineralized pegmatite At the same time it is also a mineralogical sign of Li mineralization
·In situ Lu Hf geochronology offers the potential for direct dating of garnet within petrographic context However the method requires matrix matched standards to calibrate measured Lu/Hf ratios In order to assess the accuracy of this calibration as well as the reproducibility of the resulting Lu Hf dates two Lu rich up to 1 wt% Lu garnet samples from
·Compositional characteristics of garnet in granite pegmatite system in Mufushan area and its implications for magmatic evolution and rare metal mineralization
·Abstract The in situ Lu Hf geochronology of garnet apatite fluorite and carbonate minerals is a fast developing novel analytical method It provides an alternative technique for age dating of accessory minerals in lithium caesium tantalum LCT rare element RE pegmatites where zircon is often metamict due to alteration or radiation damage
·The Mn content of garnet in pegmatite stage are positively related to the magmatic evolution garnet with high Mn content MnO>% is a sign of highly fractionated and mineralized pegmatite At the same time it is also a mineralogical sign of Li mineralization
·Aplite and pegmatite garnet δ18O values are nearly identical ‰ n=7 SD= and are similar to magmatic garnets in granitoids elsewhere On the basis of calculated δ18O values for
·Chemical data indicate that the pegmatite and aplite hosted garnets are rich in spessartine and are similar to garnets in many African Li rich pegmatites Partial melting as a source of the garnets is unlikely due to the large spessartine component the abundance of inclusions within the garnets and the general P T X evolution of the pegmatite
·Rare metals Li Be Nb Ta etc are essential for high tech and sustainable energy applications Sovacool et al 2020 Pegmatite deposits are the most important source for the global rare metal production London 2008 London 2018 Granitic pegmatites are generally believed to be formed from residual magma by the differentiation of granitic magmas Černý
Granitic pegmatites have been and continue to be important economic deposits of rare metals including Li Ta and rare earth elements in addition to industrial minerals Garnet from granitic pegmatites of the LCT NYF and mixed family pegmatites were analyzed for major and trace element contents to understand relative melt evolution to determine compositional differences
Two generations of garnet are recognized in a granite and a pegmatite from the Gangdese orogen in southeastern Tibet on the basis of a combined study of petrography major and trace element profiles and garnet O isotopes Zircon U Pb dating and Hf O isotope compositions also help constrain the origin of both granite and pegmatite The first generation of garnet Grt I
·Located at the eastern segment of the Tethyan Himalayan tectonic unit the Cuonadong leucogranites muscovite granite and pegmatite have a mineral assemblage of quartz plagioclase and alkali feldspar as well as muscovite and garnet Garnets in both muscovite granite and pegmatite belong to the almandine spessartine solid solution with
·The zonings of Y REE and Sc in garnet are mainly controlled by the composition of pegmatite forming melt and consumption of these elements due to the growth of garnet itself and other minerals
6 ·the pegmatite and it crystallized after dissolution of the preexisting pegmatite garnet Grt I domains in the presence of the granitic magma Compared with Grt I Grt II is bright in BSE images
·Al Adamello the garnet consists of a single crystal but the intergrown quartz is a polycrystalline aggregate Oxygen isotope data for mineral separates from the Sivigia pegmatite revealed that
·The Kontum Massif located in central Vietnam played an essential role in the evolution of Indochina and its adjacent areas The Van Canh granites exposed throughout the Southern Kontum Massif
·AbStRAct The magmatic garnet of seven granitic NYF niobium yttrium fluorine enriched granitic pegmatites from the Froland and Evje Iveland areas in southern Norway were studied with
·Almandine spessartine garnets from the Oxford County pegmatites and the Palermo No 1 pegmatite record significant compositional variations according to the degree of evolution of their hosting rock Garnets from the most fractionated pegmatites Mt Mica Berry Havey and Emmons show the highest Mn Nb Ta Zr and Hf values followed by those from
