 | | Journal (article/letter/editorial) | | Stratiform manganese mineralisation near Inverness, Scotland: A Devonian sublacustrine hot-spring deposit?...occurs 10 km southeast of Inverness in north-east Scotland. It overlies Precambrian Grampian Group schists...1920s and is composed principally of fine-grained braunite with minor bustamite. Lower sections of the deposit...correlate with the Achanarras horizon in northern Scotland, which marks the Eifelian-Givetian boundary; however...fine-grained groundmass principally composed of braunite [3 Mn203.MnSiO2] , with minor bustamite [(Mn,Fe |  | | Journal (article/letter/editorial) | | their diagenetic conversion products, manganite, braunite and bixbyite. The mineralogical characters and...phases as well as their texture are discussed. Braunite occurs in two generations, one earlier or contemporaneous...of conversion of todorokite and birnessite to braunite and todorokite to manganite are preserved. The...primary todorokite and birnessite directly to braunite and bixbyite should be considered while extrapolating...(max. 5% by volume) but ubiquitous manganite and braunite. Bixbyite has only been identified in the Kanpa |  | | Journal (article/letter/editorial) | | Proterozoic Manganese Group, Western Australia BRAUNITE of general composition Mn 2+ Mn63+ SiO12 (Fleischer...mineral exists in two polysomes, normal braunite (or braunite 1) which corresponds to chemical composition...3Mn~O3.MnSiO3 with about 10% SiO2 and a rarer form, braunite II, which appears to contain certain essential...Kalahari manganese ores of South Africa suggest that braunite ! is a product of sedimentary-diagenetic to very...while braunite II is characteristic of hydrothermal alteration zones (Wessels-type ore). Braunite is thus |  | | Journal (article/letter/editorial) | | Islay, Argyllshire and Dalroy, Inverness-shire, Scotland KEITH NICHOLSON* Department of Applied Geology...Geology, University of Strathclyde, Glasgow, G1 1XJ, Scotland Abstract Rhodochrosite has been discovered as...a minor component of two manganese deposits in Scotland. At Islay it occurs as coatings and veinlets on...mineralogically complex manganese-iron ore in which braunite, bustamite, manganoan ilmenite and pyrophanite...KEYWORDS: rhodochrosite, native copper, Islay, Dalroy, Scotland Introduction RHODOCHROSITE is commonly found |  | | Journal (article/letter/editorial) | | a total of sixteen manganese oxide minerals in Scotland alone (Nicholson, 1989). It is hoped that this...has been discussed above. Spencer (1898) added braunite and hausmannite although, according to Macpherson...minerals. Bevins (1988) confirmed the presence of braunite and hausmannite, and also added hollandite and...been recognised in the British Isles (birnessite, braunite, chalcophanite, coronodite, cryptomelane, groutite...286-92. Heddle, M. F. (1901) The mineralogy of Scotland (Goodchild, J. G., ed.), vol 1, David Douglas |  | | Catalog/List | | Orange masses with pink Rhodonite on dark grey Braunite 3x2.5cm £60 Scerscen Glacier, Sondrio Province...massive-crystalline area about 1 cm x 5mm area on Braunite and another smaller area. Scerscen Glacier Sondrio...red scale-like platy masses on matrix with minor Braunite 9x5 £30 Praboma Mine, Aosta Italy 20 LIZARDITE...micro red brown fibres scattered over dark grey Braunite . needs Xl0 magnification Cerchiara Mine, La Spezia...about 8x8mm in 2x2cm rock. Loch Scridain Mull Scotland 7 £6 72 MUSCOVITE mass of golden intergrown |  | | Journal (article/letter/editorial) | | Pipparagunta of Adilabad district, Andhra Pradesh,India. Braunite, pyrolusite, cryptomelaneand birnessiteare the... 8 2.34 5 These data are characteristic of braunite containing a little RhO-MnO2 (58.0 % Mn) 2.72...7 The data presented above (b) are typical of braunite (52.7 % Mn) Cryptomelaneforms colloformlayer...KRISHNA RAO FIG. 2. Braunite and jasper exhibit colloformstructure. Braunite (gray, top) is crystalline...and is separated by jasperband (black). FIa. 3. Braunite (gray) with pyrolusite(white) which is a pseudomorph |  | | Journal (article/letter/editorial) | | rock in a sulfide-barite deposit at Aberfeldy (Scotland), but unfortunately they do not describe the textural...synsedimentary origin. At the idle mine of Vitali the braunite ores and manganese-rich micaschists discontinuously...village of Vitali. The ores consist of massive braunite- and quartzrich horizons which contain calcite-...cymrite has grown at a late stage with respect to braunite, piemontite, calcite, and quartz. Celsian was...thulite + albite + manganoan omphacite (+ apatite + braunite + sphene + hollandite). The assemblages of those |  | | Catalog/List | | micro spots of melanite garnet Loch Borralan North Scotland 6x3 £8 6 BREWSTERlTE small crystals on the surface...attractive piece 6x4. Whitesmith Mine Stontian Scotland £25 7 ElJDIAL YTE rich red masses with very minor... 26 ROMEITE Imm wide vein about 1.5cm long in Braunite, Piemontite and quartz Praboma Mine, St Marcel...metallic mass 4x3cm Shierglas Quarry Blair Atholl Scotland £6 37 AGRELLITE pure grey cleavage 4x3cm one edge...was the largest producer of manganese ore in the UK, mainly during the second world war. next seven pieces |  | | Journal (issue) | | FAX:+30-210-4132-570 , e-mail : info@gemin.eu , http://www.gemin.eu UK : For the The British Lapidary & Mineral Dealers...Redoux , FRANCE . Phone Number..00 33 2 51 64 70 03 , UK Mobile.. 07817 511360 , Email... rockngem@aliceadsl...collectors. - From UK: Steve Bown , 26 Mendip Heights , Didcot, Oxfordshire OX11 7TB- UK , is a newcomer..."Pseudomorphs from Manganese-rich Epidote after Braunite Crystals" dark violet "pyramidal crystals" up...up to 2 cm with some Quartz crystals a relictic Braunite. Outstandingly good specimens of this till now |  | | Journal (article/letter/editorial) | | 1992 Mineralogy, paragenesis and genesis of the braunite deposits of the Mary Valley Manganese Belt, Queensland...deposits consist mainly of isolated occurrences of braunite, together with a number of lower and higher valency...age. The parageneses are: (a) Braunite - quartz (primary). (b) Braunite - hausmannite spessartine tephroite...(metamorphic). (c) Hydrated manganese silicates - barite - braunite - hausmannite (hydrothermal veins). (d) Tetravalent...manganese oxide reacted with silica to produce primary braunite. The later geological of evolution of this vo |  | | Journal (article/letter/editorial) | | Santorini I., iron oxide mineralogy, 89 Aegirine, Scotland, in trachyte, 399 /~kKERBLOM,G. V., see WILSON...ALDERTON, D. H. M., see RANKIN, A. H., 179 Allanite, Scotland, 445 Aluminosilicate-sodalites, X-ray study, 459...Ardaite, Bulgaria, new mineral, 357 Arfvedsonite, Scotland, in trachyte, 399 ARVlN, M., pumpellyite in basic...iron-formation assemblage, 127 Barium silicates, Scotland, in stratabound mineralization, 63 BARLEY, M....R. S. W., and COOPER, B. V., childrenite, 119 Braunite, mineralogy and genesis, 506 BRESKOVSKA,V. V. |  | | Journal (article/letter/editorial) | | a new high pressure phase CMS-X1, a Ca-bearing braunite (Mn~.~Cao.s)Mn~ § Os(SiO, 0, and quartz. A1-Mn3+-piemontite...W/irmland/Sweden 40.4 13.4 46.2 Malmqvist (1929) Glen Coe/Scotland (in andesite) 75.9 22.2 1.9 South Mountain...maximum solubility, coexistence of piemontite with braunite, wollastonite, quartz, and probably also pyrolusite...1975) will presumably not be stable at 15 kb. Braunite compositions have been plotted in the limiting...respectively. Abbreviations: An anorthite, Brn braunite, C corundum, CaMn-Gt garnet phase Ca3Mn~+(SiO3)3 |  | | Journal (article/letter/editorial) | | Mortimer House, 37-41 Mortimer Street, London W1T 3JH, UK International Geology Review Publication details...studying lithiophorite from the Lecht deposit, Scotland, by electron diffraction, found additional, very...it is associated with psilomelane, manganite, braunite, nsutite, todorokite, and kaolinite. Of these...Bihar, India, lithiophorite is associated with braunite, nsutite, pyrolusite, and cryptomelane [ 3 0 ]...may serve as an example. In the Lecht deposit, Scotland, lithiophorite occurs together with cryptomelane |  | Dasgupta, Somnath, Banerjee, H., Fukuoka, M., Bhattacharya, P.K., Roy, Supriya (1990) Petrogenesis of metemorphosed manganese deposits and the nature of the precursor sediments. Ore Geology Reviews, 5 (4) 359-384 doi:10.1016/0169-1368(90)90039-p | Journal (article/letter/editorial) | | (Mn-silicate-oxide rock). The oxides present are braunite, bixbyite, hollandite, jacobsite, hausmannite...1984 a,b) both braunite(i) and braunite (ii) agrees with the composition of normal braunite (De Villers...(i-iii), braunite(i) and hollandite often show strong preferred orientation (Roy, 1966). Braunite~ii) is...type I assemblages. In the greenschist facies, braunite(i) rims pyrolusite at the contact with quartz...symplectitic intergrowth in the absence of either braunite or hematite in the microenvironment (Bhattacharya |  | | Catalog/List | | parcel. 97 ■ ACTINOLITE Achmelvich. near Lochinver. Scotland 84 ■ CHLORITE Sopron Hungary / MAGNESIOHORNBLENDE...lx2£3 2x2£5 2x2£7 10 ■ ALBERTITE near Dingwall Scotland 244 ■ CLINOCHLORE Dypingdal. Snarum, Vikersund...mass in dark shale. ½" £4 Ix½ £8 Al 0 (OH) 73 ■ BRAUNITE Praborna Mine, St Marcel ,Piedmont, llaly Dark...7mm £5 Al 80/4 F 221- -■■ KAINOSITE Y Strontian Scotland ··- -·- ·Micro white spheres on calcite. Very...Mainland. Shetlands. Scotland Excellent rich white crystalline fibrous and radiating. Remote Uk location lx2£4 |  | | Journal (article/letter/editorial) | | to other manganese oxides such as pyrolusite, braunite, and hausmannite, and pseudomorphs of manganite...with barite, siderite, calcite, hausmannite, and braunite. Many occurrences are secondary in nature where...psilomelane,fibrous masses of gypsum, crystallized braunite, and brilliant 5-cm pseudomorphs of pyrolusite...Exeter, Devonshire; and Granam, Aberdeenshire, Scotland. Of course, the finest crystallized manganite |  | Franceschelli, M., Puxeddu, M., Carcangiu, G., Gattiglio, M., Pannuti, F. (1996) Breccia-hosted manganese-rich minerals of Alpi Apuane, Italy: A marine, redox-generated deposit. Lithos, 37 (4) 309-333 doi:10.1016/0024-4937(95)00026-7 | Journal (article/letter/editorial) | | assemblages are: (1) braunite, piemontite, and rare hausmannite; (2) piemontite, braunite, hollandite and...and minor rhodochrosite and kutnahorite; (3) braunite, hollandite and rare piemontite. The other minerals...indicate f0, > lOAs for T= 350°C and fO,, 2 lOm6 when braunite appears. On the Mn-rich rocks Ti, Fe, Nb, Sn,...the upper part for a total thickness of 3 m. (4) Braunite and/ or hollandite-rich metabreccia: bed with...thickness is 5-6 m. (5) Piemontite-hollandite-braunite metabreccia: subrounded brown clasts with a black |  | | Catalog/List | | Interest in this Catalogue:CLINOHUMITE cl"ystals from Scotland PAULIHGITEfrom N.Ir~land,new stock Qf ZUSSMANITE...crystal sections in yellow green Tale. (Near Kyle Scotland) 1x2ins 60p 2x2 t1.50 2 AEGIRINE elongated black...crystallised grey mass.(NoLocation) i~ lins :t1.60 67 BRAUNITE rich black masses. no matrix (Brandsnuten,Botnedal...s111allcrystal s on mali·ix. (Hiddleshop Nine,Strontian Scotland ,1x1 !1.60 1x2 f3.20 2x2 E6.40 2 this unusual...r.ichly distributed in Marble. Scotland) 1x2 tl 2x2 t2 2x4l5 75 BRUSHITE fawn loose 111asses |  | | Journal (article/letter/editorial) | | Copyright the Mineralogical Society KEYWORDS: braunite, supergene manganese oxides, Pilbara Manganese...mattheddleite, Pb20(Si04)7($04)4C14, from Leadhills, Scotland (Livingstone et al., 1987), we wanted to confirm...Hemimorphite, Rutland Cavern, Matlock Bath, Derbyshire, UK. ence minerals of known structure are compared in |  | | Journal (article/letter/editorial) | | . . . 1 0 0 6 3lI B r a m m a lA l ,. . . . . Braunite from Mason Co., Teras. (Ilewett, Schaller). 785...in Ordovician rocks of the southern uplands of Scotland.(Kennedy). 69 Grids for determination of nonopaque...Butte district, Mont.. 803 and Schaller,'W. T. Braunite from Mason Co., Texas. . . 785 2 1 2 IIey, M....InvernessSchaller,'W. T. Crystallography of shire, Scotland.(Tilley). . . . 720 valentinite and andorite (...Quartz, enantiomorphous,in tec-with llewett, D. F. Braunite tonites.(Fairbairn) .. 211 f r o m M a s o nC |  | Barghi, Behnaz, Calagari, Ali Asghar, Zarrinkoub, Mohammad Hossein, Simmonds, Vartan (2017) Geological and Geochemical Investigation of Three Ophiolite-Hosted Manganese Prospects, Southeast of Birjand, South Khorasan, East of Iran. Resource Geology, 67 (4) 414-425 doi:10.1111/rge.12139 | Journal (article/letter/editorial) | | The major manganese ore minerals are pyrolusite, braunite, bixbyite, ramsdellite, and romanechite showing...manganese ores consist principally of pyrolusite, braunite, and bixbyite, accompanied by lesser amounts of...bladed aggregates (Fig. 3e), while pyrolusite and braunite are massive. Bixbyite occurs as rhombohedral crystals...light-red chert. (f) Pyrolusite, bixbyite, and braunite showing replacement texture in dark-red to brown...Trace phases Pyrolusite, Hematite Pyrolusite, Braunite, Bixbyite, Hematite Pyrolusite, Psilomelane Hematite |  | Tumiati, Simone, Godard, Gaston, Martin, Silvana, Malaspina, Nadia, Poli, Stefano (2015) Ultra-oxidized rocks in subduction mélanges? Decoupling between oxygen fugacity and oxygen availability in a Mn-rich metasomatic environment. Lithos, 226. 116-130 doi:10.1016/j.lithos.2014.12.008 | Journal (article/letter/editorial) | | metabasites at the bottom of the sequence. They contain braunite (Mn2+Mn3+6SiO12), quartz, pyroxmangite (Mn2+SiO3)...well as new thermal expansion parameters for PT braunite aud pyrolusite, derived from experiments. Based...mineralogical species, ED namely piemontite, braunite, romeite, strontiomelane, and manganiandrosite-(Ce)...et al., 2010). Basal levels and veins contain braunite (the ore mineral), piemontite and jadeite-rich...al., 2008). These basal levels mainly contain braunite (Mn2+Mn3+6SiO12) and piemontite (Fig. 3), MA |  | | Catalog/List | | grey-green adiating. Lochinver, Siitherland/. Scotland. Scot.l.&lld, D aDark green tto grey-green rradiating...i n e on re. Centz-al Pro'rlllce■, IInndia. on braunite. brauni.te. R aRare. 1:1 22/&d, / 6 d . ,, 22xl...d e r blue l i n e on are. blue :xline on braunite. braunite. RRare, � Frovinceo, Pr� H, IIndia, 121 /...G rGrey 1:1 22/-, / - , 22xl x 1 56/-. /-. 1x1 BRAUNITE BRAUl!lT! Central Provinces, n d i a . G rGrey...smll'l!l BR!/ff Strontian, AArgyll, r g y l l , Scotland. a l l , bbrilliant r i l l i a n t terminated |  | | Journal (article/letter/editorial) | | metamorphosedformations contain the mineral assemblage braunite-bixbyite-hollandite-hausmannite-jacobsite-vredenburgite...NEW MEXICO PSILOMELANE MASON COUNTY. TEXAS BRAUNITE IRON COUNTY, MI$SDURI PITKIN COUNTY, COLORADO...(ALLSMAN, 195B. PRINZ, 1967) AND TOMBSTONE,ARIZONA BRAUNITE RHODOCHROSITE (EMMON$ ET AL,19Z?,ENTWISTLE,•4...O•PO$1T$, HOKKAIDO,JAPAN. BIS•EE & CORONADITE BRAUNITE RHODOCHROSITE,RHOOON•TE, ALABANDITE (HEWETT...Bixbyite (Utah and Patagonia), hausmanniteand braunite,with manganesepartly in bivalentand partly in |
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