 | | Journal (article/letter/editorial) | | Rare-Metal Mineralization in the Ambohimirahavavy Alkaline Complex, Madagascar Guillaume Estrade,1 Stefano...0E8 Abstract The Cenozoic Ambohimirahavavy alkaline complex in Madagascar consists of several syenitic...relative importance of these two processes. Skarns in alkaline system offer an important opportunity to evaluate...(Oliver et al., 1999). Another example is the Kipawa Y-ZrREE deposit (Canada), which is interpreted to have...Sinclair, 1998). The Ambohimirahavavy alkaline complex, located in the northwest of Madagascar, has been the |  | Estrade, Guillaume, Marquis, Eva, Smith, Martin, Goodenough, Kathryn, Nason, Peter (2019) REE concentration processes in ion adsorption deposits: Evidence from the Ambohimirahavavy alkaline complex in Madagascar. Ore Geology Reviews, 112. 103027 doi:10.1016/j.oregeorev.2019.103027 | Journal (article/letter/editorial) | | deposits: evidence from the Ambohimirahavavy alkaline complex in Madagascar Guillaume Estrade, Eva Marquis...deposits: evidence from the Ambohimirahavavy alkaline complex in Madagascar, Ore Geology Reviews (2019)...deposits: evidence from the Ambohimirahavavy alkaline complex in Madagascar Authors Guillaume Estrade1*...present data from the Cenozoic Ambohimirahavavy alkaline complex in Madagascar, with the aim of further constraining...weathering profiles described here are developed on alkaline igneous rocks, including both SiO2-undersaturated |  | Wu, Ming-qian, Tian, Bao-feng, Zhang, De-hui, Xu, Guo-zhan, Xu, Wen-xi, Qiu, Kun-feng (2018) Zircon of the No. 782 deposit from the Great Xingâan Range in NE China: Implications for Nb-REE-Zr mineralization during magmatic-hydrothermal evolution. Ore Geology Reviews, 102. 284-299 doi:10.1016/j.oregeorev.2018.09.006 | Journal (article/letter/editorial) | | Niobium, rare earth elements (REE = lanthanides + Y), and zirconium, are widely used in high-tech applications...metasomatic. Nb is hosted mainly by fergusonite-(Y) and, REE by fergusonite-(Y) and to a lesser extent, by bastnĂ€site-(Ce)...Introduction Nb, rare earth elements (REE = lanthanides + Y), and Zr are becoming increasingly indispensable to...especially Nb deposits are carbonatites, followed by alkaline/peralkaline igneous rocks, including silica-saturated...silica-saturated granites (Linnen et al., 2014). As alkaline/peralkaline parental magmas mainly derived from |  | | Journal (article/letter/editorial) | | fractionation during crystallization and alteration of fergusonite-(Y) from Zr-REE-Nbârich late- to post-magmatic...post-magmatic products of the Keivy alkali granite complex, NW Russia Dmitry Zozulya, Ray Macdonald, BogusĆaw BagiĆski...fractionation during crystallization and alteration of fergusonite-(Y) from Zr-REE-Nbârich late- to post-magmatic...post-magmatic products of the Keivy alkali granite complex, NW Russia, Ore Geology Reviews (2020), doi: https://doi...fractionation during crystallization and alteration of fergusonite-(Y) from Zr-REE-Nbârich late- to post-magmatic |  | Borst, A. M., Friis, H., Andersen, T., Nielsen, T. F. D., Waight, T. E., Smit, M. A. (2016) Zirconosilicates in the kakortokites of the IlĂmaussaq complex, South Greenland: Implications for fluid evolution and high-field-strength and rare-earth element mineralization in agpaitic systems. Mineralogical Magazine, 80 (1) 5-30 doi:10.1180/minmag.2016.080.046 | Journal (article/letter/editorial) | | Zirconosilicates in the kakortokites of the IlĂmaussaq complex, South Greenland: Implications for fluid evolution...nepheline syenites (kakortokites) of the IlĂmaussaq complex, South Greenland, host voluminous accumulations...accumulations of eudialyte-group minerals (EGM). These complex Na-Ca-zirconosilicates contain economically attractive...within the confines of the replaced EGM domains. K E Y WO R D S : IlĂmaussaq, late-magmatic alteration, eudialyte...BASED on studies of the peralkaline IlĂmaussaq complex, South Greenland, Ussing (1912) introduced the |  | Bernard, Cyrielle, Estrade, Guillaume, Salvi, Stefano, BĂ©ziat, Didier, Smith, Martin (2020) Alkali pyroxenes and amphiboles: a window on rare earth elements and other high field strength elements behavior through the magmatic-hydrothermal transition of peralkaline granitic systems. Contributions to Mineralogy and Petrology, 175 (9). doi:10.1007/s00410-020-01723-y | Journal (article/letter/editorial) | | Petrology https://doi.org/10.1007/s00410-020-01723-y (2020) 175:81 ORIGINAL PAPER Alkali pyroxenes and...evolution of alkaline silica-saturated systems using alkali pyroxene and amphiboles from six alkaline complexes...article (httpsâ://doi.org/10.1007/s0041â0-020-01723â-y) contains supplementary material, which is available...deposits can be primary (igneous, carbonatites and alkaline systems) or secondary (placers and ion-adsorption)... In alkaline igneous rocks, REE are hosted mainly in monazite-(Ce), xenotime-(Y), fergusonite-(Y), loparite-(Ce) |  | Morgenstern, Regine, Turnbull, Rose E., Ashwell, Paul A., Horton, Travis W., Oze, Christopher (2019) Petrological and geochemical characteristics of REE mineralization in the A-type French Creek Granite, New Zealand. Mineralium Deposita, 54 (7) 935-958 doi:10.1007/s00126-018-0854-9 | Journal (article/letter/editorial) | | Abstract The French Creek Granite, New Zealand, is an alkaline intrusion with enrichment in rare earth elements...quartz-alkali feldspar (QAF) syenite. Maximum total REE + Y contents are higher in the granite and felsic dikes...the occurrence of allanite, zircon, apatite, fergusonite, monazite, perrierite, and loparite, which are...important insight into the complex processes responsible for REE enrichment in alkaline igneous systems. Keywords...and a complex combination of processes. The primary economic sources of REE worldwide are alkaline igneous |  | van de Ven, Mathijs A. J., Borst, Anouk M., Davies, Gareth R., Hunt, Emma J., Finch, Adrian A. (2019) Hydrothermal Alteration of Eudialyte-Hosted Critical Metal Deposits: Fluid Source and Implications for Deposit Grade. Minerals, 9 (7) 422 doi:10.3390/min9070422 | Journal (article/letter/editorial) | | eudialyte in nepheline syenite from the IlĂmaussaq Complex, Greenland, one of the worldâs largest known eudialyte-hosted...partial replacement of primary magmatic eudialyte by complex pseudomorph assemblages of secondary Zr-, Nb-,...indicate a 15â30% loss of REE, Ta, Nb, Zr, Sr and Y relative to fresh eudialyte. Moreover, the gittinsite-...Kringlerne deposit in the Mesoproterozoic IlĂmaussaq complex, South Greenland, presents a major repository of...halogen-rich melts and is identified by the presence of complex NaâCaâHFSE silicates such as eudialyte- and rinkite-group |  | | Journal (article/letter/editorial) | | subordinate bastnĂ€site(Ce), parisite-(Ce), and xenotime-(Y) places an important control on the behavior of the...(HREEs; referring to the lanthanides from Sm to Lu plus Y) are lost to groundwater and rivers (Nesbitt, 1979;... The local groundwater is neutral to slightly alkaline in nature, with pH values varying between 7 and...monazite-(Ce), thorite, xenotime-(Y), magnetite, ilmenite, fergusonite-(Y), and columbite-(Fe). Quantitatively...parisite-(Ce) (Fig. 4e), and alteration of primary fergusonite grains along their rims (Fig. 4f). The saprock |  | | Book (chapter) | | categories have been arranged from simple to more complex. 1. Paramorphs. Paramorphs are the result of polymorphism...mineralogy has been carefully studied and found to be a complex mixture of mostly rare secondary copper minerals...b. Molds (of animals or plants). c. Casts. 8. Complex combinations of the above. There is very little...deposits, the sequence of events can be quite complex, but unraveling that sequence can be quite valuable...fluid. The pentlandite to violarite reaction is complex, contingent upon a great number of solution parameters |  | | Book | | categories have been arranged from simple to more complex. 1. Paramorphs. Paramorphs are the result of polymorphism...mineralogy has been carefully studied and found to be a complex mixture of mostly rare secondary copper minerals...b. Molds (of animals or plants). c. Casts. 8. Complex combinations of the above. There is very little...deposits, the sequence of events can be quite complex, but unraveling that sequence can be quite valuable...fluid. The pentlandite to violarite reaction is complex, contingent upon a great number of solution parameters |
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