 | Broom-Fendley, Sam, Styles, Mike T., Appleton, J. Don, Gunn, Gus, Wall, Frances (2016) Evidence for dissolution-reprecipitation of apatite and preferential LREE mobility in carbonatite-derived late-stage hydrothermal processes. American Mineralogist, 101 (3) 596-611 doi:10.2138/am-2016-5502ccby | Journal (article/letter/editorial) | | Abstract The Tundulu and Kangankunde carbonatite complexes in the Chilwa Alkaline Province, Malawi, contain...enrichment. In contrast to the previous work at Tundulu, we recognize three separate stages of apatite...becoming residually enriched in the HREE. Although at Tundulu the LREE-bearing products are re-precipitated relatively...rare earth elements, Chilwa Alkaline Province, Tundulu, Kangankunde, REE mobility, dissolution-reprecipitation...described in carbonatite complexes at Tundulu, Kangankunde, and Songwe, Malawi; Sukulu, Uganda; and Juquiá, Brazil |  | | Corporate Document | | Republic of Malawi Ministry of Mining Final Report of the Project for Establishment of Integrated Geographic...Development Co., Ltd. dummy Frontispiece 1 Map of Malawi Former capital: Zomba Headquarters of Geological...Lake Chilwa located in the southeastern part of Malawi and Chisi Island: Chisi Island is composed of syenite...Lake Malawi Upper right: Syenite distributed in Chilwa Alkaline Province in the south of Malawi (Cretaceous...(Cretaceous, Mesozoic) Lower right: Gneiss of Basement Complex (Proterozoic) Contents 1. Outline of the Project |  | | Journal (article/letter/editorial) | | mineraiisation in carbonatites of the Tundulu complex, Malawi: Processes at the fluid/rock interface...December 14, 1993) Abstract-The Tundulu carbonatite complex in southeastern Malawi was intruded during the late...form the various ~uorocarbonates. As such, the Tundulu carbonatites provide a natural laboratory in which...in hydrothermal veins from the Tundulu carbonatite complex in Malawi. The veins are found in different...1966). The first ring structure was centred at Tundulu Hill (Fig. 1), and is represented by several types |  | | Journal (article/letter/editorial) | | HOCHELLA:Electrochemistry and dissolution kinetics of magnetite and ilmenite. A. J. G. ELLISONand P. C. HESS:Raman...zircon study of the Morkheia Complex and associated gneisses, southern Norway: Implications for disturbed...earth mineralisation in carbonatites ofthe Tundulu Complex, Malawi: Processes at the fluid/rock interface |  | Doroshkevich, A. G., Viladkar, S. G., Ripp, G. S., Burtseva, M. V. (2009) HYDROTHERMAL REE MINERALIZATION IN THE AMBA DONGAR CARBONATITE COMPLEX, GUJARAT, INDIA. The Canadian Mineralogist, 47 (5) 1105-1116 doi:10.3749/canmin.47.5.1105 | Journal (article/letter/editorial) | | MINERALIZATION IN THE AMBA DONGAR CARBONATITE COMPLEX, GUJARAT, INDIA Anna G. DOROSHKEVICH Geological...are known, including occurrences at Tundulu and Kangankunde, Malawi (Ngwenya 1994, Wall & Mariano 1996)...hydrothermally deposited phases. This carbonatite complex provides comparisons of primary sövite and the...Carbonatite Complex The general geology, geochemistry and mineralogy of the Amba Dongar complex have been...1996). The Amba Dongar carbonatite–nephelinite complex is a subvolcanic diatreme. It consists of a sövite |  | | Journal (article/letter/editorial) | | applied to a complex of related carbonate and silicate rocks in a magmatic or extrusive complex. Primary...calcite carbonatite such as are found at the Fen complex. In fact, the genetic questions highlighted by...centimeter-to-decimeter scale. For example, at the Fen complex (Brøgger 1921, Andersen 1988), there is a spectrum...Jacupiranga complex of Brazil, of a carbonatite suite made up of perovskite calcite carbonatite, magnetite apatite...apatite dolomite carbonatite, and magnetite apatite olivine calcite carbonatite (phoscorite). With respect |  | | Journal (article/letter/editorial) | | Springer-Verlag 1973 Gravity Studies of the Fen Complex, Norway, and Their Petrological Significance* I...Reveiced September 7, 1972 Abstract. The Fen alkaline complex, which is about 2 km in diameter, is an example...almost circular gravity high centered above the complex, the residual peak value being about q- 23 regal...carbonatites and alkaline silicate rocks. I n the Fen complex, which belongs to the subvolcanic group (Verwoerd...Wyoming 82070. S* 116 I.B. Ramberg : of this complex. A preliminary account based on one gravity profile |  | Doroshkevich, A. G., Ripp, G. S., Viladkar, S. G., Vladykin, N. V. (2008) THE ARSHAN REE CARBONATITES, SOUTHWESTERN TRANSBAIKALIA, RUSSIA: MINERALOGY, PARAGENESIS AND EVOLUTION. The Canadian Mineralogist, 46 (4) 807-823 doi:10.3749/canmin.46.4.807 | Journal (article/letter/editorial) | | Abstract The Arshan carbonatites in the Transbaikalia region of Siberia consist of sövite with high concentrations...bastnäsite, calcite, fluorite, sulfates, phlogopite, magnetite, ilmenite, apatite, monazite, titanite and K-feldspar...titanite, quartz, zircon, amphibole, chlorite, magnetite, and epidote were included in the Fig. 3. Textures...Mountain Pass, USA (Olson et al. 1954), Kangankunde, Malawi (Wall & Mariano 1996), and Yuzhnoe, Russia (Ripp...K-feldspar contains as much as 0.47 wt.% Na2O. Magnetite occurs as rare octahedra to 2–3 mm across in carbonate |  | Elliott, H.A.L., Wall, F., Chakhmouradian, A.R., Siegfried, P.R., Dahlgren, S., Weatherley, S., Finch, A.A., Marks, M.A.W., Dowman, E., Deady, E. (2018) Fenites associated with carbonatite complexes: A review. Ore Geology Reviews, 93. 38-59 doi:10.1016/j.oregeorev.2017.12.003 | Journal (article/letter/editorial) | | have been identified between the presence of more complex veining textures, mineralogy and brecciation in...produced from 164 parent alkaline magmas via a complex combination of liquid immiscibility and/or 165...of hydrothermal 181 fluids in and around the complex. With very few exceptions (e.g. Arzamastsev et...(1921) in his 186 memoir on the Fen carbonatite complex, Norway. Since the initial studies of the 187...187 1920s, further investigation of this complex has advanced our understanding of its 188 petrography |  | Prokopyev, Ilya, Kozlov, Evgeniy, Fomina, Ekaterina, Doroshkevich, Anna, Dyomkin, Maxim (2020) Mineralogy and Fluid Regime of Formation of the REE-Late-Stage Hydrothermal Mineralization of Petyayan-Vara Carbonatites (Vuoriyarvi, Kola Region, NW Russia) Minerals, 10 (5) 405 doi:10.3390/min10050405 | Journal (article/letter/editorial) | | of Petyayan-Vara Carbonatites (Vuoriyarvi, Kola Region, NW Russia) Ilya Prokopyev 1,2, *, Evgeniy Kozlov...Abstract: The Vuoriyarvi Devonian alkaline–ultramafic complex (northwest Russia) contains magnesiocarbonatites...mineralization of the Vuoriyarvi alkaline–ultramafic complex. Keywords: magnesiocarbonatites; REE; ancylite;...major focus of critical metal research. The Kola region in NW Russia is host to some of the largest REE...deposits in the region are 22.4 and 36.2 million tonnes, respectively [6]. This puts the Kola region on par with |  | Chikanda, Frances, Otake, Tsubasa, Ohtomo, Yoko, Ito, Akane, Yokoyama, Takaomi D., Sato, Tsutomu (2019) Magmatic-Hydrothermal Processes Associated with Rare Earth Element Enrichment in the Kangankunde Carbonatite Complex, Malawi. Minerals, 9 (7) 442 doi:10.3390/min9070442 | Journal (article/letter/editorial) | | Enrichment in the Kangankunde Carbonatite Complex, Malawi Frances Chikanda 1, * , Tsubasa Otake 2 , Yoko...REE resource in the Chilwa Alkaline Province in Malawi, clarifies the critical stages of REE mineralization...Qinling belts, China [7]; Kangankunde, Tundulu, and Songwe, Malawi [8,9]). Processes that govern the enrichment...India [13], Bear Lodge in the USA [14], and Tundulu in Malawi [9]. This contribution focuses on the evolution...(LREE) deposit in the Chilwa Alkaline province, Malawi. Previous work carried out on the Kangankunde carbonatite |  | | Journal (article/letter/editorial) | | (Marchenko 1989), syenite pegmatites in the Oslo region, Norway (Larsen 1996), carbonatites from the Kola...The Variscan Erzgebirge is situated in the border region between Germany (Saxony) and the Czech Republic...crystallized from the granitic melt are apatite and magnetite. In contrast, pyrite, garnet, hornblende, titanite...scans 067 38#1-fév.00-2119-07 71 71 done on complex natural REE phosphates (monazite and xenotime)...that a careful search in other granites of the region is warranted. Moreover, abundance of secondary |  | Cheng, Zhiguo, Zhang, Zhaochong, Aibai, Abulimiti, Kong, Weiliang, Holtz, Francois (2018) The role of magmatic and post-magmatic hydrothermal processes on rare-earth element mineralization: A study of the Bachu carbonatites from the Tarim Large Igneous Province, NW China. Lithos, 314. 71-87 doi:10.1016/j.lithos.2018.05.023 | Journal (article/letter/editorial) | | deposit located in the Xinjiang Uygur Autonomous Region, NW China (Fig. 1) hosts a measured total rare...Tectonically, it is located in the southern part of Xinjiang Uygur Autonomous Region, NW China, neighboring the...to the south. The Tarim Craton is composed of a complex Precambrian crystalline basement and a Phanerozoic...dykes (272 Ma; Li et al., 2007). The Wajilitage complex is situated in the western TLIP, with a length...siltstone. A notable feature of the Wajilitage complex is the diversity of alkaline MA igneous rocks |  | Kozlov, Evgeniy, Fomina, Ekaterina, Sidorov, Mikhail, Shilovskikh, Vladimir, Bocharov, Vladimir, Chernyavsky, Alexey, Huber, Miłosz (2020) The Petyayan-Vara Carbonatite-Hosted Rare Earth Deposit (Vuoriyarvi, NW Russia): Mineralogy and Geochemistry. Minerals, 10 (1) 73 doi:10.3390/min10010073 | Journal (article/letter/editorial) | | Devonian carbonatite–ijolite–pyroxenite–olivinite complex comprises several carbonatite fields: Neske Vara...[12–17], China India [39–42], Italy have [43,44], Malawi [45–51], on the subjectNamibia of rare earth carbonatites...[18–37], Finland [38], India [39–42], Italy [43,44], Malawi [45–51], Tanzania [67], the USA [68–72], and Vietnam...Vuoriyarvi alkaline-ultrabasic carbonatite massif (Kola region, Russia) is one of more than 2. Geological Setting...carbonatite massif (Kola region, Russia) is one of more than massif is complex due to its multiphase nature |  | | Journal (article/letter/editorial) | | marble in which the carbonate has been replaced by magnetite, tremolite, talc, and the REE minerals cerite-(Ce)...but we suspect that the answer lies in the more complex nature of the sulfate species and a different behaviour...solid-rich fluid inclusion from the Tamazeght Complex, Morocco. The upper of the two bright crystals...bastnäsite-(Ce), fluorite, apatite, aegirine, magnetite and hematite; and (3) a massive central iron oxide...hosted by a layered, silica-undersaturated alkaline complex in which the primary magmatic REE mineralisation |  | | Journal (article/letter/editorial) | | quartz, and REEs are predominant in Amba Dongar complex (Deans et al., 1972; Doroshkevich et al., 2009;...intrusive veins were taken from the Amba Dongar complex. Several of the extensively domed Cretaceous sedimentary...that are exposed at some valley sections in the complex. Calcite veins (AT9C, MT2/2C), probably of carbonatitic...addition, representative aegirine-rich (SR) and magnetite-rich (191SR) calciocarbonatites, previously investigated...Gittins, (2016) were taken from the Siriwasan complex. Whole-rock powder was appropriate for most of |  | | Journal (article/letter/editorial) | | the Magnet Cove complex in the U.S. [20,21], carbonatites of the Salpeterkop complex in South Africa...Africa [22], and the Gross Brukkaros complex in Namibia [23]. Nb-rich polymorphs of TiO2 play a key role in...Morro dos Seis Lagos. However, laterites in this complex formed after ferro-(siderite)carbonatites that...occurred due to the site’s location in the sub-Arctic region [30]. These “preserved” sites help to identify...alkaline-ultrabasic carbonatite complex, southwest of the Murmansk region, Northwest Russia. The Vuoriyarvi |  | Xu, Cheng, Kynicky, Jindrich, Chakhmouradian, Anton R., Campbell, Ian H., Allen, Charlotte M. (2010) Trace-element modeling of the magmatic evolution of rare-earth-rich carbonatite from the Miaoya deposit, Central China. Lithos, 118 (1) 145-155 doi:10.1016/j.lithos.2010.04.003 | Journal (article/letter/editorial) | | southwestern margin of the Wudang Terrane at the southern margin of the Qinling orogenic belt (Fig. 1)....framework and tectonic evolution of the Qinling region are given in Meng and Zhang (2000), Ratschbacher...include biotite, alkali feldspar, fluorapatite, magnetite, ilmenite, perovskite, zircon, ferrocolumbite...evolution of most carbonatites include apatite, magnetite, olivine and clinopyroxene (e.g., Le Bas, 1989;...tites requires that these primary liquids undergo complex fractionation processes during their ascent. However |  | Downes, Peter J., Demény, Attila, Czuppon, György, Jaques, A. Lynton, Verrall, Michael, Sweetapple, Marcus, Adams, David, McNaughton, Neal J., Gwalani, Lalchand G., Griffin, Brendan J. (2014) Stable H–C–O isotope and trace element geochemistry of the Cummins Range Carbonatite Complex, Kimberley region, Western Australia: implications for hydrothermal REE mineralization, carbonatite evolution and mantle source regions. Mineralium Deposita, 49 (8) 905-932 doi:10.1007/s00126-014-0552-1 | Journal (article/letter/editorial) | | geochemistry of the Cummins Range Carbonatite Complex, Kimberley region, Western Australia: implications for hydrothermal...Neoproterozoic Cummins Range Carbonatite Complex (CRCC) is situated in the southern Halls Creek Orogen adjacent to...contain variable proportions of apatite–phlogopite–magnetite ± pyrochlore ± metasomatic Na–Ca amphiboles ±...Neoproterozoic Cummins Range Carbonatite Complex (CRCC) is situated at the southern apex of the Halls Creek Orogen...contain variable proportions of apatite–phlogopite–magnetite ± pyrochlore ± metasomatic Na–Ca amphiboles ± |  | | Journal (article/letter/editorial) | | recrystallized during oxidation, highlighting the complex emplacement history 1 ACCEPTED MANUSCRIPT involving...rocks within the complex (e.g. Morogan and CE Woolley, 1988). At the Callendar Bay complex in Ontario, Canada...of the dyke swarm, above an inferred plutonic complex/magma chamber at depth, the top of which has CE...has a ~5 cm thick margin where the country rock magnetite-porphyroblastic greenschist is thoroughly bleached...hematite pseudomorphs after presumed porphyroblastic magnetite of the In OU 83978 the assemblage is again a |  | | Journal (article/letter/editorial) | | importance. A vast amount of information exists on the complex massifs of this association, which are considered...mineralization; they are poor in apatite and magnetite. Nor mally, the only practical interest in such...formation of a particular level of a carbonatite complex, lying in stratified sequences, may sometimes be...ample, that the carbonatite massifs of the Aldan region with the depth of the erosion profile of the area...carbonatites as rocks appearing within a particular complex massif evidently depends mainly on pressure conditions |  | | Journal (article/letter/editorial) | | of Hong Kong, Hong Kong Special Administrative Region State Key Laboratory for Mineral Deposits Research...Abstract The Yinachang deposit in the Kangdian region, Southwest China, contains large amounts of Fe...from 10,700 to 34,000 ppm, formed together with magnetite. In the following Cu–(REE) mineralization stage...of Hong Kong, Hong Kong Special Administrative Region. Tel.: +852 2857 8251. E-mail address: mfzhou@hku...during later-stage metasomatic events to result in complex newly-formed mineral assemblages and chemical variations |  | Graupner, Torsten, Mühlbach, Caroline, Schwarz-Schampera, Ulrich, Henjes-Kunst, Friedhelm, Melcher, Frank, Terblanche, Hennie (2015) Mineralogy of high-field-strength elements (Y, Nb, REE) in the world-class Vergenoeg fluorite deposit, South Africa. Ore Geology Reviews, 64. 583-601 doi:10.1016/j.oregeorev.2014.02.012 | Journal (article/letter/editorial) | | The Vergenoeg fluorite deposit in the Bushveld Complex in South Africa is hosted by a volcanic pipe-like...silica-undersaturated assemblage of fayalite–magnetite–fluorite with variably subordinate apatite and...emplacement of other magmatic rock units of the Bushveld Complex (Sm–Nd isochron age for fluorite separates: 2040...observed: (i) flat patterns characteristic of magnetite–fluorite unit, gossan, metallurgical-grade fluorite...fayalite-rich units. Common HFSE minerals are complex Nb-rich oxides (samarskite, fergusonite), REE phosphates |  | (1994) Volume 58, 1994 List of Associate Editors and Reviewers, List of Contents, Subject Index, Author Index, Book Reviews Published, Books Received, Subject Areas of Manuscripts Published in 1994ished, Books Received,. Geochimica et Cosmochimica Acta, 58. doi:10.1016/0016-7037(94)90592-4 | Journal (article/letter/editorial) | | from Costa Rica as proxy indicator of El Niiio Southern Oscillation (ENSO) 335 C. L&UYER and J. R. O’NEIL:...Boundary in the Carnic Alps oJAustria {Gartnerkqfel Region) edited by W. T. Holser and ..I..__..___......I...mantle: Evidene from the Vitim xenolith suite, southern Siberia . 1463 U. SCHALTEGGER,P. STILLE, N....in Cambrian stratabound Ni-Mo-(PGE-Au) ores of southern China 1813 J. C. ALT: A sulfur isotopic profile...Electrochemistry and dissolution kinetics of magnetite and ilmenite A. J. G. ELLISONand P. C. HESS: |  | Montreuil, Jean-François, Potter, Eric G., Corriveau, Louise, Davis, William J. (2016) Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest Territories, Canada. Ore Geology Reviews, 72. 562-584 doi:10.1016/j.oregeorev.2015.08.010 | Journal (article/letter/editorial) | | com/locate/oregeorev Element mobility patterns in magnetite-group IOCG systems: The Fab IOCG system, Northwest...paper documents element mobility patterns from a magnetite-group Iron Oxide Copper–Gold (IOCG) prospect in...metallic signatures for the showings are typical of magnetite-group IOCG mineralization based on the classification...the evolution of a hydrothermal system hosting magnetite-group IOCG mineralized zones. This study aims...porphyritic intrusions (herein called the Fab porphyry complex; Azar, 2007) that form the northernmost extension |
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