 | | Journal (article/letter/editorial) | | titanates from micaceous kimberlite, Star mine, Orange Free State, South Africa ROGER H. MITCHELL Department...a - K - V titanates from micaceous kimberlite (Star mine, S. Africa). These data significantly extend...Ba-K-V-rich and represent solid-solutions from the priderite series towards mannardite. The second suite consists...consists of anhedral xenocrysts that are Ba-free. In this suite relatively Nb-rich varieties (>4.0% Nb205)...titanate, hollandite, priderite, kimberlite, lamproites, Star mine, South Africa. Introduction COMPLEX |  | | Journal (article/letter/editorial) | | walls: the coronadite group (M4þ ¼ Mn), and the priderite group (M4þ ¼ Ti). Two main considerations led...Ba-Fe3þ end-member; ankangite is discredited, as a H2O-free variety of mannardite; the ideal endmember formulae...Key-words: hollandite supergroup, coronadite group, priderite group, nomenclature. 1. Introduction Minerals...cation: the coronadite group (VIM4þ ¼ Mn), and the priderite group (VIM4þ ¼ Ti).1 The nomenclature of these...supergroup (e.g., hollandite, cryptomelane, priderite), a clear definition of the endmember formula |  | | Journal (article/letter/editorial) | | Composition of priderite in phlogopitites from the Catal o I carbonatite complex, Brazil Jos~ C. GASPAR...carbonatite complex, Goi~is State, Brazil. The ilmenite is transformed in part to priderite and sometimes to rutile...rutile. Priderite occurs as small anhedral grains (< 0.2mm) or composite crystals associated with ilmenite...inside the area of original magnetite grains. The priderite belongs to the K2FeTiTOI6-BaFeTi7016 series with...carbonatite, phlogopite, ilmenite, Brazil Introduction PRIDERITE, as a member of the hollandite structural group |  | | Report (issue) | | SURVEY OF SOUTH AFRICA COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA MINERALOGY OF SOUTH AFRICA:... COUNCIL FOR GEOSCIENCE GEOLOGICAL SURVEY OF SOUTH AFRICA Scientific Editor R.D. Dixon Linguistic and...Council for Geoscience (Geological Survey of South Africa), 280 Pretoria Street, Silverton, Pretoria or........................... 69 5.1 Overview of South African Occurrences ..............................LAYEREDSUITE,BUSHVELDCOMPLEX.... 111 MINERALOGY OF SOUTH AFRICA: TYPE-MINERAL SPECIES AND TYPE-MINERAL NAMES |  | | Journal (article/letter/editorial) | | are typical of orangeites (Group II kimberlite) from southem Africa. Phlogopite grains from the Damodar...within the stability field of diamond. KEYWORDS: orangeite, Group II kimberlite, 4~ Introduction UNDERSTANDINGthe...source of diamonds, many kimberlite, orangeite (also known as 'Group II kimberlite') and olivine lamproite-hosted...the Kaapvaal craton, South Africa, and the diamond-rich (5 CM/100 t) Aries kimberlite, east Kimberley, Western...India: the R. W. KENT ETAL. southeastern Raipur district of Madhya Pradesh (diamond-bearing diatremes at |  | | Journal (article/letter/editorial) | | at the north-western edge of the Aldan shield, south-western Yakutia (Russia), and has been described...at Murun by Lazebnik et al. (1985) and termed priderite. Few compositional data (6 analyses) were presented...minerals and have compositional similarities to priderite, a characteristic mineral of lamproites (Mitchell...feldspars. These swaths encircle barytolamprophyllite-free, Ba-rich potassium feldspar, producing a texture...program were calibrated by analysis of ilmenite, priderite and jeppeite standards. Mitchell and Meyer (1989) |  | | Journal (article/letter/editorial) | | of a Mantle Orthopyroxenite from the Udachnaya Kimberlite Dmitriy I. Rezvukhin 1, * , Taisia A. Alifirova...orthopyroxenite from the Udachnaya-East kimberlite pipe, Daldyn kimberlite field, Siberian platform. Epigenetic...deep-seated mantle metasomatism, infiltration of a kimberlite-related melt and late post-emplacement hydrothermal...alterations. The reaction of orthopyroxene with the kimberlite-related melt has led to orthopyroxene dissolution...minerals; melt inclusions; xenolith; orthopyroxenite; kimberlite; multistage metasomatism; orthopyroxene dissolution; |  | Mitchell, R. H., Yakovenchuk, V. N., Chakhmouradian, A. R., Burns, P. C., Pakhomovsky, Y. A. (2000) Henrymeyerite, a new hollandite-type Ba-Fe titanate from the Kovdor Complex, Russia. The Canadian Mineralogist, 38 (3) 617-626 doi:10.2113/gscanmin.38.3.617 | Journal (article/letter/editorial) | | or Pb). The subgroup of titanates consists of priderite [(K1.2Ba0.4) (Fe1.1Mg0.2Ti 6.7)⌺8.0O16] (Norrish...showed that the then newly discovered mineral priderite is a K-dominant member of this series. For the...end-member, he used the provisional name “Ba-priderite”. Subsequently, a mineral of approximate composition...Kovdor carbonatite complex (Russia) as “barian priderite” by Zhuravleva et al. (1978). It is noteworthy...data. The term “barian priderite” and its derivatives (e.g., “Ba–Fe-priderite”) have been extensively |  | | Journal (article/letter/editorial) | | the minerd collector, gold occasionally occurs in local high-grade areas in many deposits, ensuring a more...grams or about l % pounds!); Excelsior. 995 carats; Star of Sierra Leone. 969 carats; Woyie River, 770 carats;...octahedron known as &heStems Diamond, found by a mine crusher attendant and subsequently cut into three...crystal ever recovered. Sketches of well-formed South African octahedra weighing 458 carats and Downloaded...found near Kohlsville, Wisconsin, in entirely to kimberlite, a peculiar ultramafic 1886 (it was cut in I918 |  | | Book | | (Kamafugitic Rocks) 2.3.5. Potassic Lamprophyres 2.3.6. Kimberlite and Micaceous Kimberlites 2.3.7. The Shoshonite...Group Name: Barakar 3.7.4. Group Name: Murun 3.8. South American Lamproites 3.8.1. Group Name: Coromandel...Generalized Model of Eruptive Sequences Comparison with Kimberlite Diatremes Summary Mineralogy of Lamproites 6...Primary Spinels from Kimberlite and Lamprophyre 6.9.4. Secondary Aluminous Spinels Priderite 6.10.1. Paragenesis... Composition 6.10.3. Ba-Titanates Related to Priderite 6.10.4. Comparison with Hollandites in Other Potassic |  | | Book | | discovery of these rocks in the Orange Free State of South Africa. The name is not a new one: In 1928,...kimberlites and reviews some of the advances in kimberlite petrology since 1986. The work is a critical...although current hypotheses for the genesis of kimberlite and orangeite are critically reviewed. These...3. Boshof District . . . 1.8.3.1. Roberts Victor 1.8.3.2. New Elands 1.8.4. Winburg District ... 1.8.5...Kroonstad District .. 1.8.6. Swartruggens District. 1.8.7. Dokolwayo .. 1.8.8. Prieska District 1.8.9. Summary |  | | Journal (article/letter/editorial) | | crystallization of perovskite (and apatite). Priderite ((K,Ba)(Ti,Fe3+)8O16) has low Mg and V, and a...Ba)2(Ti,Fe)6O13), has higher Sr and Nb content than priderite. Both contain low Y and REEs. Wadeite (K2ZrSi3O9)...Wade and Prider 1940; Prider 1965). The mineral priderite (K,Ba)(Ti,Fe3+)8O16 was named in his honour (Norrish...that they were derived from mica peridotite (kimberlite) and might contain diamonds. Subsequent Jaques...diamondiferous olivine lamproite pipes in the Ellendale field with diamonds subsequently mined from Ellendale |  | | Journal (article/letter/editorial) | | lithospheric mantle associated with Cretaceous kimberlite activity: Evidence from a harzburgite containing...Metasomatism Zircon Tazheranite Betafite K–Cr priderite a b s t r a c t In this study we combine textural...sampled by a Cretaceous kimberlite of the central Kaapvaal Craton, South Africa. Two episodes of interaction...isotopic system. The coincidence between zircon and kimberlite eruption ages further supports a temporal and...and genetic link between Cretaceous kimberlite activity and hydrous potassic metasomatism in the central |  | | Journal (article/letter/editorial) | | of Bolivian crocidolite, 791. Albitc, structural state in relation to temperature, 83 ; Woodbinemeteorite...Czechoslovakia, anal., 389. Amba Dongar, Gujarat State, India, melanite, 775. Ameletite = nepheline or...germanates, chromates, and manganates, 654. Ardglen, New South Wales, todorokite, 757. Arendal, Norway, titanian...Belnhausen, Darmstadt, Germany, ankerite, 138. Benallt mine, Caernarvon~hire, Wales, bannisterite and ganophyllite...meteorite, metallography, 1139. Broken Hill, New South Wales, calciocelsian, celsian, 914. Bronzite, Assisi |  | | Journal (article/letter/editorial) | | Canada P7B 5El Abstract Within a suite of felsic-free, mica-rich alkaline ultramafic rocks of the Schryburt...Particularly evident is the need to re-examine the general field term - - Mineralogical Magazine, March 1994, Vol...in a number of ways: it occurs in an environment free of feldspathoids and feldspar and it is found intimately...and elements existing in more than one valency state (e.g. Fe, Ti). More detailed accounts of hollandite-group...(Mitchell and Vladykin, 1993); (7) Sover North kimberlite (Mitchell and Vladykin, 1993); (8) Prairie Creek |  | | Journal (article/letter/editorial) | | dynasty (320–298 B.C.) who regulated an active local diamond trade (Maillard, 1980). Legends associated... Figure 4. A diamond crystal in “blue ground” from South Africa, probably from the collection of Gardner and...stream beds, possibly very far from the primary kimberlite pipes. However, some also were probably found...(Maillard, 1980); these were probably not mines in kimberlite but deep diggings in diamond-bearing conglomerates...Hyderabad, and the only modern producing diamond mine in India exploits the Majhgawan lamproite pipe near |  | Harris, Garrett A., Pearson, D. Graham, Liu, Jingao, Hardman, Matthew F., Snyder, David B., Kelsch, Dave (2018) Mantle composition, age and geotherm beneath the Darby kimberlite field, west central Rae Craton. Mineralogy and Petrology, 112. 57-70 doi:10.1007/s00710-018-0609-4 | Journal (article/letter/editorial) | | composition, age and geotherm beneath the Darby kimberlite field, west central Rae Craton Garrett A. Harris...northern Canada, contains several diamondiferous kimberlite fields that have been a focus of episodic diamond...central Rae lithosphere, as well as the first kimberlite eruption age of 542.2 ±2.6 Ma (2 σ; phlogopite...of a ~200 km thick lithosphere at the time of kimberlite eruption, greater than the lithospheric thickness...mantle sampling dominantly in the graphite stability field whereas Al-in-olivine thermometry shows a distinct |  | Rezvukhin, Dmitriy I., Malkovets, Vladimir G., Sharygin, Igor S., Tretiakova, Irina G., Griffin, William L., O'Reilly, Suzanne Y. (2018) Inclusions of crichtonite-group minerals in Cr-pyropes from the Internatsionalnaya kimberlite pipe, Siberian Craton: Crystal chemistry, parageneses and relationships to mantle metasomatism. Lithos, 308. 181-195 doi:10.1016/j.lithos.2018.02.026 | Journal (article/letter/editorial) | | minerals in Cr-pyropes from the Internatsionalnaya kimberlite pipe, Siberian Craton: crystal chemistry, parageneses...minerals in Cr-pyropes from the Internatsionalnaya kimberlite pipe, Siberian Craton: crystal chemistry, parageneses...minerals in Cr-pyropes from the Internatsionalnaya kimberlite pipe, Siberian Craton: crystal chemistry, parageneses...RAS, Novosibirsk, 630090, Russia c Novosibirsk State University, Novosibirsk, 630090, Russia SC b ...crichtonite-group minerals from the Internatsionalnaya kimberlite pipe were studied to provide new insights into |  | | Journal (article/letter/editorial) | | they demonstrate the evolutionary trend from priderite (5.2 wt.% K20, 7.4 wt.% BaO) to Ba-Fe hollandite...interest in the Bearpaw Mountains are given in the Field Trip Guidebook T346 published for the 28 th International...TITANITE STRONTIOCUEVKIN~TE CnEVKINITE-(Ce) PRIDERITE Ba-Fe "HOLLANDITE" "METALOPARITE" BASTNAESITE-(Ce)...I are from Mitchell and Vladykin (1993) basin, South America (Haggerty and Mariano, 1983) and peratkaline...crichtonite, 6-7 ilmenite, 8-9 pyrophanite; 10 priderite, core of a zoned crystal; 11 Ba-Fe hollandite |  | | Book | | Xenoliths and Mantle Nodules Kimberlite Facies 90 Origin of Kimberlite 109 Origin of Diamond 116 References...Lamproite 139 Genesis of Lamproite in Comparison with Kimberlite 142 References 143 CHAPTER 8 PLACERS 147 Pleistocene...4 1.2 Kimberlite and lamproite fields in Brazil 7 1.3 Kimberlite fields in South Africa 8 1.4 Major...Major kimberlite sites in Russia 9 1.5 Main Russian diamond mine sites and kimberlite bodies within...within Siberian platform 13 1.6 Kimberlite fields south of the White Sea 15 1.7 Diamond placers in Venezuela |  | | Journal (article/letter/editorial) | | quarry; Sheltor ; and Staple Vor. WALES Benallt mine, Caernarvonshire, bannisterite, ganophyllite, 893;...976. Laxford, myrmekitic gneiss, 49l. Leverburgh, South Harris, garnets-amphibole pyroxenite, 380. Lgch...Loch Ossigary, South Harris, orthopyroxene-olivine-amphibole rock, 380. Loch Rodil, South Harris, garnet...914. B u l g a r i a (137~ArapHa) Iglika, Elhovo district, thaumasite, 1003. R u s s i a (POCCHa) Baranchin... 747. ASIA Arabia South Oman, meteorite, 740, 850. Amba Dongar, Gujarat State, melanite, 775. Dongri |  | | Journal (article/letter/editorial) | | locations, iind interesting mineral occurrences in the state of Wyoming. Five publications were used extensively...Postcard view of the Tenderfoot mine (about 19131, Esterbrook copper district, Albany County. John Taylor...a scale of 1 inch equals 4 miles) of the entire state of Wyoming in book form. The Wwming Atlas and Gazetteer...and Grace Dyck and wus titled “The Sunrise Iron Mine near Hartville, Wyoming”; it appeared in the MaylJune...Minerals was titled “The Copper Mountain Pegmatite District, Freniont County, Wyoming” and was in the JulylAugust |  | | Journal (article/letter/editorial) | | flexibility of, 327; Zr-bearing, Igaliko Dyke Swarm, South Greenland, 107 Analcime-bytownite intergrowth in...55 BALDWIN, J. R., tantalum minerals, Southern Africa, 571 Bannisterite, barian, Japan, 85 Bariandite...Ferrontantalite replacing manganotantalite, South Africa and Namibia, 571 FLEISCHER, M., see ATENCIO...387 Gahnite-quartz-sillimanite assemblages, South Africa, 63 Galena, Silvermines, Ireland, 293 GARNER...H6gbomite, Aldan Shield, USSR, 376; zincian, South Africa, as an exploration guide to metamorphosed massive |  | | Journal (article/letter/editorial) | | euhedralcrystalswith squarecrosssec1970)90 miles south and west of Smoky Butte. A tions, often forming...content;the with a for sodium-poor, extends north-south to be The Smoky Butte outcrop is close to l0 molecule...rocks, the analcite crystallizedabove the stability field of sanidine and quenching prevented the normal appearanceof...Composition of Smoky Butte ferric armalcolite (solid star) compared to a lunar armalcolite (solid circle)...(1970) and to a Hawaiian ferropseudobrookite (open star) analysis (FPSB l3 in Anderson and Wright, t972) |  | | Report (volume) | | parental or derivative ? 85 DAWSON, J. B. The kimberlite clan: relationship with olivine and leucite lamproites... Geochemistry of ocean island basalts from the South Atlantic: Ascension, Bouvet, St. Helena, Gough and...Island 269 FITTON, J. G. The Cameroon line, West Africa: a comparison between oceanic and continental alkaline...of the classic alkaline provinces, such as East Africa, southern Greenland and the Kola Peninsula, are...February 1986, of Brian Baker, whose pioneering field studies formed the basis for much of our knowledge |
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