 | | Journal (article/letter/editorial) | | A weathered skarn-type mineralization in Ivory Coast: The Ity gold deposit Didier BĂ©ziat a,â, Luc Siebenaller...Birimian Ivory Coast Gold mineralization Saprolitic zone Skarn a b s t r a c t Although the Ity deposit...operating mine in Ivory Coast, very few studies exist on this deposit. It is situated in Western Ivory Coast...Abidjan. The mine is presently operated and mined by SMI (SociĂ©tĂ© des mines d'Ity â Society of Ity Mines),...in the Ity area form a cluster of mining operations of various sizes (Flotouo, Zia, Mont Ity), hosted |  | Gunn, A.G., Dorbor, J.K., Mankelow, J.M., Lusty, P.A.J., Deady, E.A., Shaw, R.A., Goodenough, K.M. (2018) A review of the mineral potential of Liberia. Ore Geology Reviews, 101. 413-431 doi:10.1016/j.oregeorev.2018.07.021 | Journal (article/letter/editorial) | | of iron ore is currently restricted to a single mine, Yekepa, in the Nimba Range. Other important deposits...Niger, Burkina Faso and CĂŽte dâIvoire (Figure 2). At Ity in CĂŽte dâIvoire, located about 25 km from the Liberian...Africa. One of the areas studied was the Toulepleu-Ity area in Liberia and western CĂŽte dâIvoire, running...lithology, the alteration assemblages may include phlogopite, talc, magnetite, hematite, iron sulfide, tourmaline...mineralised zone and the immediate hanging wall, phlogopite and chlorite are found within the ore zone and |  | | Other Paper | | « CARACTERISATION DE PHLOGOPITE DâAMPANDRANDAVA PAR LES METHODES FLUORESCENCE-X ET VALORISATION DU GISEMENT...rh_miora@yahoo.fr / rakmiora@gmail.com RESUME La mine dâAmpandrandava figure parmi les plus vieilles mines...datant avant la pĂ©riode coloniale. Elle est la seule mine encore accessible en profondeur et en quasiactivitĂ©...souterraine, cette mine se caractĂ©rise aussi par les diffĂ©rents minĂ©raux dont la phlogopite unique en son...et valoriser le minĂ©ral de phlogopite, il est important dâinscrire la mine parmi les patrimoines de lâexploitation |  | Lawrence, D.M., Allibone, A.H., Chang, Z., Meffre, S., Lambert-Smith, J.S., Treloar, P.J. (2017) The Tongon Au Deposit, Northern CĂŽte dâIvoire: An Example of Paleoproterozoic Au Skarn MineralizationâŒ. Economic Geology, 112 (7) 1571-1593 doi:10.5382/econgeo.2017.4522 | Journal (article/letter/editorial) | | Wollastonite Fluorite/fluorapitite Titanite *Forsterite *Phlogopite *Tremolite Clinoizosite/epidote Prehnite/pumpellyite...of Mg-rich prograde skarn (stage 2 diopside, phlogopite, tremolite, and forsterite) are partly replaced...Zone B Diopside + tremolite + forsterite â + phlogopite 1Talc Epidote + prehnite + calcite + albite...zone 2 = diopside; zone B = localized diopside + phlogopite + tremolite + forsterite; zone C = hedenbergite...Mgrich minerals such as forsterite, tremolite, and phlogopite (Table 2). However, isocon/mass balance analyses |  | | Journal (article/letter/editorial) | | Dawson, Department of Geology, University of Sheffield, Sheffield Si 3,1D, U.K. R. Fuge, Department of Geo[...Inner Zone Pegmatoid body, a coarse ~gmatitic phlogopite-apatite pyroxenite (Verwoenl 1967). The Goudini...of Lake Magadi, Kenya, and at the Gelai magnesite mine, east shore of L. Natron, Tanzania; trona samples...~uorine into apatite relative to co-existing phlogopite. In the case of Cl, this apparently partitions...to apatite; in addition, when the analyses for phlogopite and vermiculite are compared, it will be ~een |  | | Journal (article/letter/editorial) | | 1988 Barium-rich the Upper phlogopite Canada Implications in a mantle Mine derived xenolith of kimberlite...During a petrological study of the Upper Canada Mine kimberlite dyke, Ontario (Arima et al., 1986a...Potential reservoirs of Ba in the upper mantle are phlogopite and to a lesser extent which are unusually higher...discuss petrological significances of the Ba-rich phlogopite related 218 to origin of continental volcanic...exposed in a under ground of the Upper Canada Mine, in the vicin ity of Kirkland Lake, Ontario, Canada (Fig |  | | Journal (article/letter/editorial) | | PREFACE D uring the journey along the west coast of Grcenland where some of the members of the G...hcterogeneoUB banded and veinod gneiSSâŹR along the west coast of Greenland, the gl'anodioritic gnciss of Sukkertoppon...yielded difTerently sinoe ~hey bad not ~be same fluid itY and mobility in ~heir solid state, The mobile crystalline...Due to the mobili!y of the elemen~s of ~he saJic mine"als (quar~z, felspars) thoso elemen~s will migra~e...part is a possibIe reason for the greater fluid itY af the eentral zone during the deformation. The mcelwnical |  | | Journal (issue) | | Jump Mountain. At the Howell iron mine outcrop, just below the copper mine, con siderable talcose schist...hill below the outcrops of iron ore at the Howell mine, but we had no light to explore this. The tunnel...and a hard, dark green serpentine with a little phlogopite and chrysotile, and coated with a secondary deposit...contenta was noticed, except possibly at the Stinson mine. The marble quarry on the Hope-Danville road, seemed...pyroxene, phlogopite, tourmaline and pyrite. In a sample of lean. ore from the Stinson Mine was a little |  | | Journal (article/letter/editorial) | | about ] mile southwest of the Crystal Graphite mine and about 11 miles southeast of Dillon in southwestern...Contribution No. 260 from The Mineralogical Laboratory, Department and Mineralogy, The University of Michigan, Ann...of various proportions of: diopside,tremolite, phlogopite,epidote-groupmineralsand calcite.Some varieties... sillimanite-almandite subfacies) Diopside, phlogopite, calcite, calcic plagioclase, sphene, zlrcon...G. V. GIBBS Arnauan Hollnn, Department of Physics, Loyola IJni,aers,ity, Chicugo. There are two points |  | | Journal (issue) | | AZ 85715 602-299-5274 Articles The Jacupiranga mine, Sao Paula, Brazil ...............................coated with malachite, 5 cm across, from the Onganja mine, Namibia. Collection of the Sorbonne, University...(available from the Mineralogical Record Book Department . . . see ad) should be advised that it may not...D N o v . 10-11: St. Paul's A cad em y, Garden C ity, L.I., NY N o v . 23-25: A rm ory, 14th S t., NYC...known Brazilian mineral collector, gem dealer and mine owner. $24.00 postpaid, (foreign orders 50C additional |  | | Journal (article/letter/editorial) | | 1910). At one time, jasper was mined at the Parrot mine (Chittenden Co.) on a small scale for use in colorful...sources and are not included in the following local ity list. Perkins (1900) indirectly suggests that native...orthoclase palygorskite paragonite phengite pecoraite phlogopite pimelite? plagioclase group albite oligoclase...limonite, wad. Bennington County Bennington manganese mine in Bennington: wad. Mount Anthony Formation (Mount...Formation in Bakersfield: albite. Vermont and Boston mine in Berkshire: azurite, bornite, chalcopyrite, malachite |  | | Journal (article/letter/editorial) | | and Sterling Hill, New Jersey Rosenr J. Tn-lcv Department of Geological Sciences,Virginia Polytechnic Institute...Ba and highest Cr contents. Barian, fluorian phlogopite, also on vein margins, has about 3 wto/oof both...Igneousoccurrencesof barian, F'orClt. titanian phlogopite have been reported from an alkaline INrnonucrroN...kinoshitalite, a barian, manganoananalogueof phlogopite. Solie and Su (1987) describeda low-Mn, kinoshitalitelike...occurrencesinclude barian phlogopite in marble from Rogaland,Norway (Bol et al., 1989),and Ba,Mn phlogopite in ore skarn |  | | Journal (article/letter/editorial) | | Dawson 2 1 Department of Earth Sciences, University of Leeds, Leeds LS2 9 J T (England) : Department of Geology...of metasomatism (e.g. veining, K-richterite or phlogopite) and from M A R I D xenoliths (Mica Amphibole...kimberlite mine in Kimberley. Mineral phases analysed include mainly K-richterite, phlogopite, diopside...subsolidus reaction producing K-richterite from phlogopite is assumed. The liquid appears to have had kimberlitic...of continental uplift [6]. * Present address: Department of Geology, University of Zimbabwe, P.O. Box |  | | Journal (article/letter/editorial) | | ResearchLaboratory, The Pennsylvania State [Jnitsers,ity,University park, Pennsylaania. ABSTRAcT The thermal...Muscovite Phlogopite 2M Kaolinite Dickite Halloysite Serpentine Pyrophyllite Helen Beryl Mine, S. Dakota...060 3 8. 0 60.2 2.368 1. 5 3 5 Muscovite Phlogopite o0.12 00.11 00.10 216 HERBERT A. MIKINSTRY...CopnrrcLrurs ol Cr,ev MrNnner,s Mineral Muscovite Phlogopite Kaolinite Dickite Halloysite Serpentine Pyrophyllite...low angle, but no alternative was feasible. The phlogopite had severaloverlappingpeaks in the neighborhoodof |  | | Report (issue) | | Asia: Pakistan, Afghanistan and India .......6 0 Old Mine Emeralds . . . . . . . . . . . . . . . . . . . ...Maharajahs and Maharanis held large emeralds (see "Old Mine Emeralds" page 62). The Color of Islam Emerald...emerald and even testify to a stone's authentic ity. Broken emerald crystals are sometimes found frozen...have produced the green fire: âą Norway, Byrud Gard mine near Eidsvoll: the dumps are accessible on the shores...train station. Light bluish green emeralds in phlogopite schist with white albite blocks; good specimens |  | | Journal (article/letter/editorial) | | ridotite group. These include the paucity of phlogopite and absenceof K-richterite in the former, precludinga...in kimberlites, a group of minerals, including phlogopite, amphibole, rutile, ilmenite, armalcolite, and...usually enclosedwithin serpentine.A small patch of phlogopite is in contact with rutile and olivine on one...rutile by phlogopite. Minor armalcolite occurs between the rutile and olivine + phlogopite, similar to...analysesmade with a fine (-2in composition, with The phlogopite is hetereogeneous pm diameter) electron beam |  | | Journal (issue) | | Mesa Grande district of San Diego Countyâthe Queen mineâthat yielded these beautiful tourmaline crystals...single copies or back issues to the Subscriptions Department. To obtain a Japanese translation of Gems & Gemology...o u r n is principal scientist in the Physics Department at De Beers DTC Research Centre, Maidenhead,...Spear is a research scientist in the Physics Department at De Beers DTC Research Centre. With De Beers...of physics at the Gemology Laboratory, Physics Department, University of Nantes, France. He has a Ph.D |  | | Journal (article/letter/editorial) | | T. RAO, C. V. RAMAN, AND CH. S. PRAKASA RAO Department of Geology, Andhra University, Waltair 530oo3...Prakasa Rao Departm~t of Geology, A r ~ a Umive~ity, Waltair, India The frequent occurrence of m e t...coarse calcites, ls a very narrow zone contalni~ phlogopite, py~rhetits and ~ u l ~ aggregates of apatite...sideroph~llite p~oportions in the m i ~ a~ it is M g rich phlogopite. The te~pe~ture range c ~ e r s the 6O0~ obtained...Copyright the Mineralogical Society ~d coexisting phlogopite I o ~ per 26 or 84 (0, OH, F, Cl) ORISSA, INDIA |  | | Journal (article/letter/editorial) | | Montana TODDW. JOHNSON Ăž ANDLAWRENCE D. MEINERT Department of Geology, Washington StateUniversity, Pullman...porphyryMo targets;how1882. The McLaren open-pit Au-Cu-Ag mine oper- ever, the porphyrytargetsidentifiedwere too...shal(Table1) andare currentlynot includedin the mine low-marinetransgressions andregressions acrossthe...McLarendepositbut maybe completelyreplacedby biotite-phlogopite, chlorite, locallyintensenear faultsor in the...nd other fluid consist of (1) magnetite-rich phlogopite assemblages,conduits,and extendsup to 183 m awayfromthe |  | Chen, H., Clark, A. H., Kyser, T. K., Ullrich, T. D., Baxter, R., Chen, Y., Moody, T. C. (2010) Evolution of the Giant Marcona-Mina Justa Iron Oxide-Copper-Gold District, South-Central Peru. Economic Geology, 105 (1) 155-185 doi:10.2113/gsecongeo.105.1.155 | Journal (article/letter/editorial) | | ** YUMING CHEN 4,⥠AND TIMOTHY C. MOODY 5,âĄâĄ 1 Department of Geological Sciences and Geological Engineering...Centre for Isotopic and Geochemical Research, Department of Earth and Ocean Sciences, University of British...supported by 40Ar/39Ar geochronology of biotite, phlogopite, actinolite, cummingtonite, and K-feldspars,...Ma) generated, respectively, cummingtonite and phlogopite-magnetite assemblages through high-temperature...magnetite-biotitecalcic amphibole ± phlogopite ± fluorapatite to magnetite-phlogopite-calcic amphibole-pyrrhotite-pyrite |  | | Journal (article/letter/editorial) | | Departmentof Geologi.cal Sciences,H arvard U nivers,ity, Cambridge, M assachusetts.r AssrR.{cr Hendricksite...from slightly zincian and manganoan varieties of phlogopite up to material in which the octahedral positions...occupied octahedral positions are Mg be called phlogopite. When the Mg content falls below this limit,...the senseof a manganoanvariety of biotite or phlogopite, or as biotite. A semi-quantitativeexamination...material representsa solid solution extending from phlogopite of essentiallv the end-composition to material |  | | Journal (article/letter/editorial) | | Fedorovsk formation, which yields iron ore and phlogopite. Carbonate rocks in the Fedorovsk forma tion...This does not mean that we reject the possibil ity that undisturbed (autochthonous) carbonate rocks...control of the localization of the iron ore and phlogopite deposits, with all the In this paper, the geologic...less often with schists were observed directly in mine workings. The marble contacts are rather un even...calciphyre, 4) high-grade magnetite ore, 5) runof-mine magnetite ore, 6) quartzite and leucocratic gneiss |  | | Journal (issue) | | just recently and we have made ar rangements to mine all that may be in the deposit. At the present we...College, which has no geology program. A science department head there wrote that the relics of the colÂ... The science department head arranged for the material to go to our geology department at Lafayette as...of 2x5â and 5x7â size; an outstand ing Wheatley Mine anglesite group showing glassy, clean-cut, one-inch...Franklin, N.C.; bournonite and tetrahedrite, Herodsfoot mine, Cornwall; campylite, Drygill, Cumberland; gold |  | Starikova, A. E., Sklyarov, E. V., Kotov, A. B., Salânikova, E. B., Fedorovskii, V. S., Lavrenchuk, A. V., Mazukabzov, A. M. (2014) Vein calciphyre and contact Mg skarn from the Tazheran massif (Western Baikal area, Russia): Age and genesis. Doklady Earth Sciences, 457 (2) 1003-1007 doi:10.1134/s1028334x14080182 | Journal (article/letter/editorial) | | likely controlled by the effect of reflected alkalin ity. Pyroxeneânepheline rocks are composed of anhe dral...apparent regularity. Segregations and zones of phlogopite formed at the post magmatic skarn stage after...spinelâforsterite calciphyre; (3) vein of forsteriteâspinelâphlogopite calciphyre in nepheline syenite. Prv, perovskite...aggregates are completely replaced with later phlogopite. Among the accessory minerals of contact magnesium...nepheline rock (Sample SE1074A) in order to deter mine the age of contact magnesium skarn. Baddeleyite |  | | Journal (issue) | | Presidency College, KolkaTa 700 073 S. S. SARKAR Department of Geo logy, Dll rgapur Government College, DU...DU I:ïżœapllr 713 2 J 4 AND P. P. BANERJEE Department of Geo/(lg 'J, Presidency College, Kolkata 700...ai" I 999). It is necessary now to closely eX:...mine and quantify the compositional characteri stics...ies a greater degree of compositional h omogene ity. The poor correlation pattern is apparently a reflection...Attapadi can draw some similarity with the Renco mine in that both occur within the gra n u l i te b e |
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