 | 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 |  | Broom-Fendley, Sam, Brady, Aoife E., Horstwood, Matthew S.A., Woolley, Alan R., Mtegha, James, Wall, Frances, Dawes, Will, Gunn, Gus (2017) Geology, geochemistry and geochronology of the Songwe Hill carbonatite, Malawi. Journal of African Earth Sciences, 134. 10-23 doi:10.1016/j.jafrearsci.2017.05.020 | Journal (article/letter/editorial) | | and geochronology of the Songwe Hill carbonatite, Malawi Article in Journal of African Earth Sciences ·...and geochronology of the Songwe Hill carbonatite, Malawi Sam Broom-Fendley a, *, Aoife E. Brady b, 1, Matthew...2017 Available online 2 June 2017 Songwe Hill, Malawi, is one of the least studied carbonatites but has...scarce and is composed of mediumecoarse-grained calcite carbonatite containing zircons with a UePb age...Island and Tundulu in the Chilwa Alkaline Province and others worldwide. The fine-grained calcite carbonatite |  | | 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...and second episodes, the major rock types were calcite carbonatites, ankerite carbonatites, and apatite...earth fluorocarbonates were deposited. Veins in calcite carbonatites contain abundant synchysite [(La,...bastnksite. The crystallisation sequence seen in calcite carbonatites represents a progressive depletion |  | | 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) | | and A2-type granites in the PanAfrican basement complex of Egypt are mineralized with one or more of the...feldspar granite and peralkaline granite, Ring-complex provinces some of which may be similar to the Nigerian...rocks Fig. 2 Lineament map and alkaline complex in the southern Egypt. type is medium- to coarse-grained...range in thickness from few centimeKhruq (AK) ring complex, Eastern Desert of Egypt (Fig. tres to 3 m and...reach about 120 m in strike lengths. 2). This complex is one of the A1- type alkaline complexThey are |  | Smith, M., Kynicky, J., Xu, Cheng, Song, Wenlei, Spratt, J., Jeffries, T., Brtnicky, M., Kopriva, A., Cangelosi, D. (2018) The origin of secondary heavy rare earth element enrichment in carbonatites: Constraints from the evolution of the Huanglongpu district, China. Lithos, 308. 65-82 doi:10.1016/j.lithos.2018.02.027 | Journal (article/letter/editorial) | | a is activity), and breakdown of HREE-enriched calcite in aCa2+ and aCO2− 3 may have been the HREE source...Yuantao. the variation in the stability of aqueous complex ions with different ligands (Haas et al., 1995;...associated with late stage hydrothermal phenomena (e.g. Tundulu - Ngwenya, 1993; Songwe - Swinden and Hall, 2012;... Sulphide mineralised calcite-quartz carbonatite. Sulphide mineralised calcite-quartz carbonatite. Sulphide...Sulphide mineralised calcite-quartz carbonatite. Sulphide mineralised calcite-quartz carbonatite. Sulphide |  | 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 |  | 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...abundant carbonate 7 141 mineral present e.g. calcite carbonatite, dolomite carbonatite, ankerite carbonatite...1981; Woolley and Kempe, 1989) including 148 calcite, dolomite, ankerite, siderite and magnesite (Woolley...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 |  | | Journal (article/letter/editorial) | | zircon study of the Morkheia Complex and associated gneisses, southern Norway: Implications for disturbed...waters. W. J. STAUDT,R. J. REEDER,and M. A. A. calcite single crystals. SCHOONEN: Surface structural...earth mineralisation in carbonatites ofthe Tundulu Complex, Malawi: Processes at the fluid/rock interface |  | Broom-Fendley, Sam, Brady, Aoife E., Wall, Frances, Gunn, Gus, Dawes, William (2017) REE minerals at the Songwe Hill carbonatite, Malawi: HREE-enrichment in late-stage apatite. Ore Geology Reviews, 81. 23-41 doi:10.1016/j.oregeorev.2016.10.019 | Journal (article/letter/editorial) | | REE minerals at the Songwe Hill carbonatite, Malawi: HREE-enrichment in late-stage apatite Sam Broom-Fendley...Ap-1 are typical of apatite found in fenite and calcite-carbonatite, Ap-2, -3 and -4 are texturally atypical...carbonatite-related HREE enrichment are known (e.g. Kangankunde, Malawi; Khibiny, Russia; Deadhorse Creek, Canada; Huanglongpu...REE-bearing minerals at the Songwe Hill carbonatite, Malawi, were investigated with the objective of understanding...enrichment occurs in late-stage apatite at the Tundulu, Kangankunde and Juquiá carbonatites (Ngwenya, |  | | Journal (article/letter/editorial) | | compositional zoning of SO2-4 and Se02-4 in synthetic calcite single crystals. W. L. MARSHALL:Hydrothermal Synthesis...mineralisation in carbonatites of the Tundulu Complex, Malawi: Processes at the fluid/rock interface |  | | Journal (article/letter/editorial) | | applied to a complex of related carbonate and silicate rocks in a magmatic or extrusive complex. Primary...kimberlite clans, with the latter best being termed calcite kimberlites. Each magma type and associated carbonatites...fractional crystallization or liquid immiscibility. Calcite kimberlites are smallvolume late-forming differentiates...manifestations préférablement appelées kimberlites à calcite. Chaque type de magma et les carbonatites associées...fractionnée ou immiscibilité liquide. Les kimberlites à calcite seraient des différenciés tardifs à volume limité |  | 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...fluid-inclusion data. The recrystallization of calcite, the replacement of bastnäsite and phlogopite,...formation of secondary sulfates, strontianite, calcite and fluorite resulted from a hydrothermal process...inclusions fluides. La recristallisation de la calcite, le remplacement de la bastnäsite et de la phlogopite...formation de sulfates secondaires, de strontianite, de calcite et de fluorite ont résulté d’une activité hydrothermale |  | | 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 |  | Broom-Fendley, Sam, Wall, Frances, Spiro, Baruch, Ullmann, Clemens V. (2017) Deducing the source and composition of rare earth mineralising fluids in carbonatites: insights from isotopic (C, O, 87Sr/86Sr) data from Kangankunde, Malawi. Contributions to Mineralogy and Petrology, 172 (11) doi:10.1007/s00410-017-1412-7 | Journal (article/letter/editorial) | | isotopic (C, O, 87Sr/86Sr) data from Kangankunde, Malawi Sam Broom‑Fendley1 · Frances Wall1,2,3 · Baruch...compositions for the REE-rich Kangankunde carbonatite (Malawi), we show that the commonly observed, dark brown...similar δ18O and 87Sr/86Sr to those of the main complex, indicating both are carbonatite-derived and, locally...Verplanck et al. 2016); Kangankunde, Tundulu and Songwe, Malawi (Ngwenya 1994; Wall and Mariano 1996;...hexagonal crystals, either co-genetic with calcite in calcite carbonatites (e.g., Bear Lodge and Shaxiongdong; |  | | Journal (article/letter/editorial) | | the principal primary REE mineral. Within each complex the C – O and Sr – Nd isotopic data are similar...for burbankite group minerals and co-existing calcite or dolomite (Khibina: d13C(V-PDB) = 6.4 to 5.8x...mineralization and its host carbonatites in each complex are derived from the same source and are co-genetic...primary burbankite and calcioburbankite. Co-existing calcite and dolomite have retained their original C and...and O isotope compositions, and one calcite sample from Khibina shows strong positive d13C – d18O shifts |  | | Journal (article/letter/editorial) | | around syenites, e.g., at the Mlanje Mountains in Malawi (Platt & Woolley 1986), are not considered here...of Congo (Woolley et al. 1995), Chilwa Island, Malawi (Woolley 1969) and Fen, Norway (Brøgger 1921)....1921 for certain rocks of the intrusive complex at Fen in southern Norway. He described fenite as any rock...country-rock in contact with the igneous rocks of the Fen complex; however, he did not apply the term to rocks produced...around sövitic carbonatites, some fine-grained calcite carbonatites and, less commonly, around other carbonatites |  | | Journal (article/letter/editorial) | | fibrous aggregates together with chlorite and calcite. The rare earth element (REE) distribution pattern...filled with secondary minerals such as zeolite, calcite, quartz, chalcedony, chlorite, fluorite, etc. and... GEOLOGICAL CONTEXT The Massif de l’Esterel (southern France) is characterized by Permian volcanic activity...summit, exhibiting abundant bubbles filled with calcite, locally with a chlorite rim, or amethyst. The...amygdule with chlorite (Chl) spherules and late calcite (Cal) filling (cross-polarized light). (D) Photomicrograph |  | Andrade, F.R.D, Möller, P, Lüders, V, Dulski, P, Gilg, H.A (1999) Hydrothermal rare earth elements mineralization in the Barra do Itapirapuã carbonatite, southern Brazil: behaviour of selected trace elements and stable isotopes (C, O) Chemical Geology, 155 (1) 91-113 doi:10.1016/s0009-2541(98)00143-0 | Journal (article/letter/editorial) | | mineralization in the Barra do Itapirapua˜ carbonatite, southern Brazil: behaviour of selected trace elements and...Barra do Itapirapua˜ carbonatite is located in southern Brazil and belongs to the Cretaceous Ponta Grossa...opening of the South Atlantic. The carbonatite complex is emplaced in Proterozoic granites and is mainly...Karonge, Angola Žvan Wambeke, 1977. and Tundulu and Kangankunde, Malawi ŽNgwenya, 1994; Wall and Mariano, 1996...focuses on the Barra do Itapirapua˜ carbonatite, southern Brazil ŽFig. 1., particularly on the geochemical |  | 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 |  | 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...magnesiocarbonatites with ancylite–baryte–strontianite–calcite–quartz (±late Ca–Fe–Mg carbonates) ore assemblage...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 |  | Ruberti, E., Enrich, G. E.R., Gomes, C. B., Comin-Chiaramonti, P. (2008) HYDROTHERMAL REE FLUOROCARBONATE MINERALIZATION AT BARRA DO ITAPIRAPUA, A MULTIPLE STOCKWORK CARBONATITE, SOUTHERN BRAZIL. The Canadian Mineralogist, 46 (4) 901-914 doi:10.3749/canmin.46.4.901 | Journal (article/letter/editorial) | | ITAPIRAPUÃ, A MULTIPLE STOCKWORK CARBONATITE, SOUTHERN BRAZIL Excelso RUBERTI§, Gaston E.R. ENRICH and...The Barra do Itapirapuã (BIT) carbonatites in southern Brazil belong to the final stages of the Early...magmatism of the Ponta Grossa Arch Province. The BIT complex is a dyke and vein stockwork in which four main...elements during fluid–rock interaction. The BIT complex is considered to be of potential economic interest...Recently, the Barra do Itapirapuã (BIT) carbonatite complex was recognized as an important potential source |  | 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) | | Available online 13 April 2010 Keywords: Carbonatite Calcite REE partitioning Fractional crystallization REE...by that of the rockforming Ca minerals (i.e., calcite, dolomite, and ankerite) and apatite because of...light REE (LREE). Contrary to this conjecture, calcite from the Miaoya carbonatite (China), analyzed in...earlier than the REE-poor calcite, and REEfluorocarbonates that postdated the calcite. Hydrothermal REE-bearing...phosphates. Subsequent crystallization of REE-poor calcite led to enrichment of the residual liquid in REE |  | 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) | | holocrystalline textures dominated by dolomite and calcite, respectively. Monazite-(Ce) and bastnäsite-(Ce)...higher HREE concentrations. Both dolomite and calcite have low total REE (TREE) contents ranging from...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 |  | | 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...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...in a synchysite-(Ce) grain in a calcite carbonatite from Tundulu, Malawi (Ngwenya 1994). Chemically, the |
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