| | 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 | | | Journal (article/letter/editorial) | faults or their intersections(Kaiserstuhl, Feia district), in or on the edge of rift-valleys. They are...schorlomite)was foundat severaloccurrences, as well as cassiterite,gold and tourmaline. The only depositsof pyrochlorein...to 500 microns. The distributionof zirconand cassiterite is comparable;thoriteand xenotime tendto formsomewhat...roof pendantsin the Idibas (Congo), Madagascar,at Bikita and in the Yellowknife-Beaulieu districts; at low...the small Bikita field, scheeliteveins and skarnsare nearer to the contact than cassiterite and tantalite-columbite | | | 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 | 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 | (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 | | | 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 ©...ye ty a ara id (ean ® “1 le hI AAP : oo A Mine seh Ranier “i i : lever vei ekealps ; cet ...coating fractures in sandstone at the Fuemrol No. 2 mine, Temple Mountain, Emery County, Utah; also sparsely | | | 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...coating fractures in sandstone at the Fuemrol No. 2 mine, Temple Mountain, Emery County, Utah; also sparsely...Silver Plume district, and at the Little Emma mine, Clear Creek County; at the Enterprise mine, Dolores County;...lode, Summit County, and in the Cripple Creek district. It is also found in Canada; Mexico; Bolivia; | | | Book | 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 . . . . . . ...River, Vadodara District, Gujarat . . . . . . . . . 3.5.2 Ujol River, Panchmahal District, Gujarat . . | | | Book | In the shafts and tunnels of a sixteenth-century mine INTRODUCTION arabic^groffcvinditaris.f} norrafludd9...important ore minerals hematite, Fe203, and cassiterite, Sn02, a tin oxide, are representative of the...want to check this, you will have to visit a salt mine; halides are dissolved by groundwater if they are...walking and for work in such places as quarries and mine dumps. The second requirement is for old, expendable...Collectors working on the spoil tip of a mine. Quarries and mine workings remain a fruitful source for the | | | Book | important ore minerals hematite, Fe,O3, and cassiterite, SnO>, a tin oxide, are representative many...want to check this, you will have to visit a salt mine; halides are dissolved by groundwater if they are...walking and for work in such places as quarries and mine dumps. The second requirement is for old, expendable...Collectors working on the spoil tip ofa mine. Quarries and mine workings remain a fruitful source for...particular feldspars or micas, or perhaps beryl, cassiterite, or tourmaline. The rest of this chapter is intended | | | Book (edition) | Vesuvius, Italy (12, column 2) and SEMSEYITE, Julcani mine, Huancavelica, Peru (#3, column 2). Color, page...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...Juab County, and with austinite at the Gold Hill mine, Tooele County, Utal1; in Inyo, San Bernardino,...Simon mine, Mineral AENIGMATITE County , Nevada. Magnificent specimens occur at the Ojuela mine, Mapimi |
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