 | | Journal (article/letter/editorial) | | meteoric alterations of the Lueshe carbonatite complex žDemocratic Republic of Congo / identified by a REE...whole-rock samples of the Lueshe carbonatite complex ŽNE of Democratic Republic of Congo.. The fresh and hydrothermally...fluorhydric-nitric solution ŽHF q HNO 3 .. The Lueshe carbonatite complex contains a suite of REE-carriers...Meteoric weathering; Rare-earth elements; Republic of Congo 1. Introduction Among the chemical characteristics...large quantities of Fig. 1. Geological map of the Lueshe complex Žmodified after Maravic et al., 1989.. |  | | Journal (article/letter/editorial) | | Pyrochlore from weathered carbonatite at Lueshe, Zaire F. WALl.,C. T. WILLIAMS,A. R. WOOIJ.EY Department...pyrochlore in the laterite above carbonatite at Lueshe, NE Zaire, has been made in order to determine...variations. Pyrochlore in fresh carbonatite at Lueshe is close to an ideal formula of (Ca,Na)2Nb206(OH...worldwide. As a result weathered pyrochlore at Lueshe has a large apparent A cation deficiency with A...remain stable. Abundant kalipyrochlore is unique to Lueshe and is thought to be related to the abundance of |  | Torró, L., Villanova, C., Castillo, M., Campeny, M., Gonçalves, A. O., Melgarejo, J. C. (2012) Niobium and rare earth minerals from the Virulundo carbonatite, Namibe, Angola. Mineralogical Magazine, 76 (2) 393-409 doi:10.1180/minmag.2012.076.2.08 | Journal (article/letter/editorial) | | to a few tens of centimetres and contain quartz, baryte, calcite, ankerite and dolomite (Fig. 4c). In the...heavy minerals including magnetite, pyrochlore, baryte and apatite. Residual and placer deposits containing...porosity, which is partly infilled with small drusy baryte crystals. It is found in areas affected by strong...dominant minerals in the hydrothermal veins; fluorite, baryte and strontianite are common in some of the veins...by pyrochlore of the third generation (Pcl 3). Baryte (Ba) is also present. (f) Pyrochlore crystal from |  | | Journal (article/letter/editorial) | | characterized by goethite, hematite, psilomelane, baryte, fluorite with minor calcite, bastnäsite and significant...ferruginous calciocarbonatite containing siderite, baryte and fluorite, a greater proportion of bastnäsite...ferruginous calciocarbonatite containing minor siderite, baryte and uorite, with a greater proportion of bastnäsite...om el ane [Ba(H2O)2MnO10 ], goethite, hematite, baryte and uorite (Table 3). One of the rst reported...consists mainly of goethite, hematite, psilomelane, baryte, uorite and monazite with minor calcite and bastnäsite |  | | Journal (article/letter/editorial) | | carbonatites at Argor, Carillon Dam, Chilwa Island, Fen, Lueshe, Oka, Mbeya, Meech Lake and Verity. Primary features...e veinlets and low A-ion totals (Carillon Dam, Lueshe, Myeba). K EY WORDS : zoned crystals, carbonatites...to Ce4+ in some pyrochlore from laterite (e.g. Lueshe and Mbeya of this paper; see below) it is not possible...pyrochlore pyrochlore,uranpyrochlore Mineral Lueshe, Dem. Rep. of Congo San Vicente, Cape Verde Is. Kovdor,...7), ceriopyrochlore (Lueshe specimen BM 1966/232 – rim) and kalipyrochlore (Lueshe specimen BM 1966/232 |  | | Journal (issue) | | net NOVEMBER–DECEMBER 2022 Articles The Laohuan mine, Goncheng, Zhuang, Guangxi, China.................Type Mineralogy of the Democratic Republic of the Congo...................................................yellow pyromoprhite crystals, 9 cm, from the Laohuan mine, Gongcheng County, Guangxi, China. Federico Pezzotta... Hickox, Jr. Wally Mann Keith and Diane Brownlee Dr. Nikolas Golosow William B. (Bill) Wray Herb & Monika...w w.FineMineral.com Copper Pearl Handle Pit Ray Mine, Arizona 13 cm Copper has been an essential metal |  | | Journal (article/letter/editorial) | | (SrLa); YAG (YLa); ZrO (ZrLa); Nb (NbLa); SnO (SnLa); baryte (BaLa); LaB6 (LaLa); CeO2 (CeLa); REE1 (PrLb);...of the central African mega-unit, made up of the Congo, Kasai and Angolan cratons (Goodwin, 1996). The...mineral assemblages including quartz, fluorite, baryte, ankerite and dolomite (Bambi et al., 2004). The...(mainly synchysite-(Ce)), Ca-REE fluorocarbonates and baryte. Most of the carbonatite outcrops described in...mineral. The small white dots are hydrothermal baryte and synchysite. (b) Detail of the internal texture |  | Rampilova, Maria, Doroshkevich, Anna, Viladkar, Shrinivas, Zubakova, Elizaveta (2021) Mineralogy of Dolomite Carbonatites of Sevathur Complex, Tamil Nadu, India. Minerals, 11 (4) 355 doi:10.3390/min11040355 | Journal (article/letter/editorial) | | It also contains small inclusions of norsethite, baryte, strontianite, barytocalcite, benstonite and calcioburbankite...magnesium will decrease (Figure 7). norsethite, baryte, strontianite, barytocalcite, benstonite and calcioburbankite...Inclusions of norsethite (Nor), dolomite (Dol), baryte (Brt), strontianite (Str), barytocalcite). (b–f)...Inclusions of norsethite (Nor), dolomite(Bur) (Dol), baryte (Brt), (Mnz) strontianite (Str),(Cal). barytocalcite...associates with monazite, benstonite, norsethite and baryte. Strontianite (SrCO3) associates with barytocalcite |  | Moore, K.R., Wall, F., Divaev, F.K., Savatenkov, V.M. (2009) Mingling of carbonate and silicate magmas under turbulent flow conditions: Evidence from rock textures and mineral chemistry in sub-volcanic carbonatite dykes, Chagatai, Uzbekistan. Lithos, 110 (1) 65-82 doi:10.1016/j.lithos.2008.11.013 | Journal (article/letter/editorial) | | crystals of apatite and aegirine, and anhedral baryte, which formed after corrosion of apatite and magnetite...contemporaneous rapid undercooling. The anhedral baryte formed as a by-product of an oxidising hydrous...and a post-mingling mineral assemblage, including baryte, crystallised in a partially hybridised heterogeneous...Namibia) and occurs in calcite carbonatite at Lueshe, D.R. Congo where incorporation and metasomatic alteration...Minerals present Calcite Apatite Magnetite Titanite Baryte Pyrite Garnet (pyralspite series) Melilite Augite |  | Guowu, Li, Guangming, Yang, Fude, Lu, Ming, Xiong, Xiangkun, Ge, Baoming, Pan, de Fourestier, Jeffrey (2016) Fluorcalciopyrochlore, A New Mineral Species From Bayan Obo, Inner Mongolia, P.R. China. The Canadian Mineralogist, 54 (5) 1285-1291 doi:10.3749/canmin.1500042 | Journal (article/letter/editorial) | | dolomite, aegirine, riebeckite, diopside, fluorite, baryte, phlogopite, britholite-(Ce), bastnäsite-(Ce)...sequence deposited in easttrending grabens along the north edge of the Archean crystalline Sino-Korean craton...rocks are aegirine, riebeckite, diopside, fluorite, baryte, phlogopite, britholite-(Ce), bastnäsite-(Ce)...Williams, CNMNC Chairman, for his help and advice, and Dr. Adam Pieczka for his advice. This study was supported...(2000) Pyrochlores from the Lueshe carbonatite complex (Democratic Republic of Congo): A geochemical record |  | | Journal (article/letter/editorial) | | from hydrothermal quartz veins of the Bayan-Obo mine of Mongolia, China (Peng, 1959; Semenov et al.,...dikes from US, Russia, Democratic Republic of Congo and New Zealand (Heinrich et al., 1962; Koneva et...hydrous silicates in the Kvaloya lamproite dyke, North Norway. Minerlogy and Petrology, 105, 145–156. Kullerud...tectonic setting of a lamproite dyke in Kvaløya, North Norway. Lithos, 126,278– 289. Kullerud, K (1995)...(1996) Pyrochlore from weathered carbonatites at Lueshe, Zaire. Mineralogical Magazine, 60, 731-750. Woolley |  | | Journal (article/letter/editorial) | | gneisses, which occur in the north-west-south-east escarpment to the north-east. The Ufipa gneisses and...and other metamorphic groups further to the north and east belong to the Ubendian System. The area has...described by Miyashiro and Iwasaki (1957), and also the Lueshe alkalic amphibole (Jans a n d d e Bethune, 1968)...it is considered to have formed from weathered baryte, apatite, and aluminous material. In the Tanzanian |  | | Journal (article/letter/editorial) | | south, and São Nicolau and São Vicente in the north of the archipelago). Recent descriptions include... 2), a carbonatite dyke swarm trending roughly north– south cuts the Basal Complex basaltic dykes and...outcrop is interpreted as a carbonatite lava flow. North of Hortas de Camilla (point C in Fig. 2), there...and field view, respectively, of outcrops to the north of Hortas de Camilla, where carbonatites are either...cuts the banding (Fig. 5a), abundant interstitial baryte and rare hollandite (Table 1). The banding has |  | 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) | | episode of late Precambrian alkaline magmatism in the north and south of the country (Bloomfield, 1968, 1970;...from the surrounding plain. The hill abuts the north-western flank of Mauze, a large, oval, nepheline...6 4 km in area and 800 m high. To the north-west and north-east are two, lower-lying, hills: Chenga...dolerite. This unit is most prominent on Chenga Hill, north-west of the main Songwe Hill intrusion (Fig. 2A)...Localised assemblages of euhedral synchysite-(Ce), baryte, and anhedral strontianite are disseminated throughout |  | | Journal (article/letter/editorial) | | continues the series of 21 published triennially by Dr. L. J. Spencer between 1897 and 1958. Such lists...MHHepa~orM~ecKoro O6~eCTBa; the eorttinuation of Dr. Speneer's series seems desirable since it differs...fumarole on Cerro Pululus, north-west Argentina, appear to be F%As20 n. Named after Dr. V. Angelelli, Director...a fissure mineral at Lhngban, Sweden. Named after Dr. Ragnar Blix. [M.A. 14-416.] Bobkowit. Gerlnan transliteration...List), named by J. de Lapparent (1927) in honour of Dr. Johann Bahm of Berlin; corrected in ~r Jahrb. Min |  | | Journal (article/letter/editorial) | | deposits of the Middle Timan are located in the North of European Russia, between the NE edge of the Russian...form during lateritic weathering of REE-bearing baryte and apatite from a pro le over carbonatites in...weathered part of the pro le over carbonatites at Lueshe, Zaõ¨re. Although a similar intergrowth was not...Postdoctoral Fellowship from NATO/Royal Society to Dr Leonid Mordberg. Dr C.T. Williams, Mr J. Spratt and Mr F. Galbert...and produced the X-ray maps, and Mr C. Jones and Dr A. Ball kindly helped obtain the highresolution photographs |  | | Journal (issue) | | permission of the author. -3- FLUORITE Wet Grooves Mine Yorkshire . I was recently given the opportunity...specimen she had collected from the Wet Grooves Mine dumps. The Mines, situated in Yorkshire, were originally...Merritt for information relating to the Wet Grooves Mine. Brian Prowse -4- ;; ~ SUSSEX MINERAL SHOW...superb specimen of Sphalerite from the Small Cleugh mine, Nenthead, Cumbria. -6- .... Sussex Show - 21...showing schrockingite and johannite from the Geevor Mine, Cornwall, and also had some fine vivianite crystals |  | | Journal (article/letter/editorial) | | beforsite, and a late-stage rare-earth element, baryte, fluorite mineralization. Carbonatite rock is composed...include arfvedsonite, orthoclase, olivine, fluorite, baryte, strontianite, bastn/isite, parisite, monazite...development of albitite. Examples of this are the Lueshe and Kirumba carbonatites in eastern Zaire (Meyer...beforsite, and a late-stage rare-earth element, baryte, fluorite mineralization. Carbonatite rock is composed |  | | Book | | HongKong Barcelona Budapest Professor Dr. A. B. KAMPUNZU Professor Dr. R. T. LUBALA Laboratoire de Petrologie...thank Springer-Verlag, the publishers, especially Dr. W. ENGEL (Geosciences Editorial) for the prompt...Permian times in Thdhak province (Fig. 2) along the north-south trending Tesoffi trough, on the eastern margin...northeastern Africa, especially in the Nile River valley, north from Khartoum towards the Egyptian frontier, the...continental trough on the southern borders of the Congo and Thnzania cratons, though comparable in size |  | | Journal (article/letter/editorial) | | molybdenite, zircon, bismite, carbocernaite, pyrochlore, baryte and rutile are accessory minerals. Amphibole and...magnesium siderite. Comparison of magnesite with Lueshe and Kangankunde hydrothermal magnesite–siderite...useful comments and the constructive criticism from Dr. Anatoly Zaitsev. We are indebted to the anonymous...graphite in dolomite carbonatite at Pogranichnoe, North Transbaikalia, Russia. Contrib Mineral Petrol 153:339–353...Calcite-bearing dolomite carbonatite dykes from Veseloe, North Transbaikalia, Russia and possible Cr-rich mantle |  | | Book | | The spellings of names follow CIM; thus pyrite, baryte and sylvine replace the older pyrites, barytes...abundance in the Keweenaw area of north Michigan; at the Copper Queen mine, Bisbee, Arizona and at Georgetown...Canada deposits occur at the Klondike, Yukon Territory, in Nova Scotia and Ontario. Treatment. Gold is...areas including Kimberley, Pretoria (the Premier mine is in this area), and Jagersfontein in the Orange...Localities. Lead is found in Sweden at the Harstig mine, Pajsberg; from the gold placers of the Ural Mountains |  | | Journal (article/letter/editorial) | | Kaur and Mitchell (2013), where it occurs with baryte, pectolite and hydrogarnet as pseudomorphs after...(1996) on twin-poor crystals from the Benitoite Gem mine (San Benito, California), followed by that of Arakcheeva...urtites; (5) Burpala albitites and aegirinites; (6) Lueshe carbonatite, depicted in the ternary system Na...(1959) from the Lueshe carbonatite complex (North Kivu, Democratic Republic of the Congo). Simultaneously...ignimbrites of the Upper-Chegem volcanic structure, North PEROVSKITE SUPERGROUP Caucasus (Galuskin et al |  | | Book | | Figures Springer-Verlag Berlin Heidelberg GmbH Prof. Dr. PETER MöLLER Hahn-Meitner-Institut Berlin GmbH Bereich...Reaktor Postfach 390128, D-1000 Berlin 30 FRG Prof. Dr. PETR CERNY Department of Earth Science University...Manitoba, Winnipeg Manitoba R3T 2N2 Canada Prof. Dr. FRANCIS SAUPE Centre de Recherehes Petrographiques...1950. The seeond is still oeeasionally used in North Ameriea. Thus, the entire suite of elements dealt...partial patterns of lanthanite(Ce) from the Britannia Mine, Wales, UK (Bevins et al. 1985) and oflanthanite-(N |  | | Book | | Garson—198/ Frontispiece. Photograph taken by Dr Dudley Foster of Woods Hole Oceanographic Institution...material, together with brittle white precipitates of baryte and amorphous silica coating tube walls of honeycomb...prepara- - Preface xi tion. In particular we thank Dr H.G. Reading of Oxford University for his influence...geological activities not confined to his own field; Dr T. Deans formerly of the Institute of Geological...kimberlites; Dr T.C. Hart of the Regional Remote Sensing Facility in Nairobi, Kenya and Dr G.C. Tolbert |  | | Journal (article/letter/editorial) | | quartz and grained dolomitic carbonatites with baryte, strontianite, and ancylite-(Ce). All these minerals...to 14 medium-grained dolomitic carbonatites with baryte, strontianite, and ancylite-(Ce). All these minerals...carbonatite massif, Chadobets upland (Krasnoyarsk Territory, Russia). Period. Mineral. 2017, 86, 99–118. [CrossRef]...Nasraoui, M. Pyrochlore from Weathered Carbonatite at Lueshe, Zaire. Mineral. Mag. 1996, 60, 731–750. [CrossRef]...Mariano, A. Rare Earth Mining and Exploration in North America. Elements 2012, 8, 369–376. [CrossRef] Andersen |
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