 | | Journal (article/letter/editorial) | | 157 Simpso'aite and other tantalate~ from Bikita, Southern Rhodesia. By A. M. MAcommoa, M.A., F.G.S...of Southern Rhodesia. [Read November 1, 1945.] Bikita till and tantalum field is cenCred about 43 miles...the Mdara mine and the Al Hayat claims situated about three-quarters of a mile apart. The Mdara mine...columbium to tantalum varies considerably. At the Mdara mine the ratio of TazO 6 to Cb~Os varies in different...b y Gelding in a sample f r o m t h e M d a r a mine, w h i c h i n c l u d e d ore f r o m a n e w p |  | | Report (issue) | | corresponding to Alo.98 (TaO.99Nbo.02)~=1.Ol04' (2) Bikita, Zimbabwe; by electron microprobe, corresponding to...manganotantalite, zirconian hafnon, apatite, albite, muscovite (Bikita, Zimbabwe); simpsonite, manganotantalite...on the Kola Peninsula, Russia. In the Mdara mine, Bikita, Zimbabwe. From the Alto do Giz pegmatite, near |  | | Journal (article/letter/editorial) | | schorlomite,and titanomagnetite.The gangue is spheneor apatite,and olivine. Pyrochloreis a rarer recrystallization... Somes6viteor alvikite, rauhaugite,pyroxenite,apatite rock, melilitites,nephelin syenite, ijolite, urtite...faults or their intersections(Kaiserstuhl, Feia district), in or on the edge of rift-valleys. They are...alkalinerocks, (d) fenRes. Phosphateis fixed in apatite, and sideritic or ankeritic iron segregatesas titanmagnetite...roof pendantsin the Idibas (Congo), Madagascar,at Bikita and in the Yellowknife-Beaulieu districts; at low |  | | Journal (issue) | | y. 8. Zircons and Monazite from the Tambane district, SouthernProvince,Nyasaland-(Iead method 28 )...Zircons from nepheline-syenite-gneiss, south of Mine Camp, Tambane apparent ages of four samples: 515...from an albite-aegirine rocl( 2 miles north-west of Mine Camp, Tambane apparent age: 542 m.y. Average apparentage...the above: 550 m. y. 9. Davidite, Mavuzi, Tete District, Mozambique-(chemical analysis 29 ) uncorrected...45 ) apparent age: 625 11. Lepidolites,Karibib District, South-West Africa-(strontium, ± 70 m.y. 60 |  | | Book | | (formerly Belgian Congo), Zambia, 602 485 Zimbabwe Norway, 486 (formerly Rhodesia), 603 488 ...more km) from Coptos passed center for these district, correspond cites a King to the are to Bostock...location of the mines Holland’s translation, of district, and it could have been Probably these mines...north of Thebes. No emeralds exist the emerald mine through stones. Qift as as other mineral, ... he cited Rome time, and the “Peruvian emerald mine” is described the lead a was “A beautiful |  | | Journal (issue) | | was discovered in 1881 1881 at Soomjam in the district of Padar (Jammu and © Copyright the Gemmological...intermittently mined at several localities (Old Mine, New Mine, Valley). The production included some large...visited at the Chimwadzulu Hill (Figure 2) and the mine at © © Copyright the Gemmological Association ...crystal symmetry of grossular garnets from the Jeffrey mine, Asbestos, Quebec, Canada. American Mineralogist... 859-64,4 figs. Orange garnets from the Jeffrey mine, Asbestos, Quebec, Canada, may show non-cubic symmetry |  | | Book | | REMARKS by PROFESSOR R. A. L. BLACK 95 MISTRESS MINE by H.J. MARTIN 96 DELEGATES IN ATTENDANCE • INDEX...pegmatites. and we have one deposit. namely. that at Bikita. which for it size. and the value which ha. been...excess of 12 million pound, already. valued ·at mine·. The main minerals. of cot1r,e. have been tin....particularly the tructure at depth. As Minister of Mine . 1 am extremely interested in the po sibilities...the unwcathcred zone. is much more expensive to mine. The coarse beryl con tent of many pcgmatites is |  | | Book | | resources under this category are associated with apatite–magnetite vines of Singhbum Shear Zone (SSZ), Jharkhand...Pradesh. In addition, pegmatites of the Madurai district, Tamil Nadu, also contain REE minerals. Where...Area, Jharkhand and West Bengal . . 3.3.2 Simdega District, Jharkhand . . . . . . . . . . . . . . . . . .... . . . . . . . . . . . . . . . 3.4.1 Jashpur District, Chhattisgarh . . . . . . . . . . . . . . . .... . . . . . . 3.4.3 Sarguja District, Chhattisgarh and Sonbhadra District, Uttar Pradesh . . . . . . |  | | Book | | Keweenaw area of north Michigan; at the Copper Queen mine, Bisbee, Arizona and at Georgetown, New Mexico....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...several localities in Chile, and from the Mohawk mine, Keweenaw County, Michigan; also from Lake Superior...chalcocite. Localities. Fine crystals from the Calabona mine, Alghero, Sardinia; other localities are Chile, |  | | Book (edition) | | Morocco; (center, left) wulfenite, San Francisco mine, Sonora, Mexico; (center) ameihyst, Veracruz, Mexico;...rnodochrosite, N’Chwaning mine, South Africa; (lower left, center) wulfenite, Red Cloud mine, Arizona; (lower...Pe Wr * se vat © C6 tad GAa Snive Sr Certain Mine (ax agry wh Oe ee — SS 4 eae wid Bharce ©...follows: 1 2 3 4 5 Talc Gypsum Calcite Fluorite Apatite 6 7 8 9 10 Orthoclase Quartz Topaz Corundum Diamond...talc, (2) gypsum, (3) calcite, (4) fluorite, (5) apatite, (6) orthoclase, (7) quartz, (8) topaz, (9) corundum | | | Book (edition) | | Morocco; (center, left) wulfen ite San Francisco mine, Sonora, Mexico; (center) amethyst, Veracruz, Mexico;...Mountains, Utah; (lower le ft) rhodochrosite, N'Chwaning mine, Sou th A frica; {lower left, center) wulfenite...follows: I Talc 2 Gypsum 3 Calcite 4 Fluorite 5 Apatite 6 7 8 9 10 Orthoclase Quartz Topaz Corundum Diamond...talc, (2) gypsum, (3) calcite, (4) fluorite, (5) apatite, (6) orthoclase, (7) quartz, (8) topaz, (9) corundum...coating fractures in sandstone at the Fuemrol No. 2 mine, Temple Mountain, Emery County, Utah; also sparsely |  | | Book | | prominent. The commonest and most widespread is apatite, Cas(PO4)3(OH, F, Cl), which is a minor constituent...recrystallized to very fine-grained aggregates of apatite, are the world’s main sources of phosphorus for...lining of a druse or roc: cavity Right: Violét apatite from Saxony. Apatit one of the world s main sources...want to check this, you will have to visit a salt mine; halides are dissolved by groundwater if they are...suggest calcite or dolomite; both of these gonal apatite, have prisms while rhombohedral may indicate | | | Book | | In the shafts and tunnels of a sixteenth-century mine INTRODUCTION arabic^groffcvinditaris.f} norrafludd9...prominent. The commonest and most widespread is apatite, Ca5(P04)3(0H, F, Cl), which is a minor constituent...recrystallized to very fine-grained aggregates of apatite, are the world’s main sources of phosphorus for...want to check this, you will have to visit a salt mine; halides are dissolved by groundwater if they are...Hexa¬ gonal prisms may indicate quartz, beryl, or apatite, while trigonal prisms (having a trian¬ gular rather |  | | Book (edition) | | Vesuvius, Italy (12, column 2) and SEMSEYITE, Julcani mine, Huancavelica, Peru (#3, column 2). Color, page...follows: 1 Talc 2 Gypsum 3 Calcjte 4 Fluorite 5 Apatite 6 Orthoclase 7 8 9 10 Quartz Topaz Corundum Diamond...talc, (2) gypsum, (3) calcite, (4) fluorite, (5) apatite, (6) orthoclase, (7) quartz, (8) topaz, (9) corundum...coating fractures in sandstone at the Fuernrol No. 2 mine, Temple Mountain, Emery County, Utah; also sparsely...Pelican Dives rnine , Silver Plun1e district, and at the Little Emma mine, Clear Creek County; at the Enterprise |
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