 | | Journal (issue) | | W. Pinch Famous mineral localities: Klein Spitzkoppe, Namibia . . . . . . . . . . . . . . . 317 by B... from O Stope, 31st Level of the Tsumeb mine, Namibia. William Pinch collection; Jeff Scovil photo. For...up to the beautifully engraved scenes on mining stock certificates, and the work of modern painters, scattered...the previous find. The only associated mineral is quartz. The pictured piece has a number of fine crystals...Record, 13, 137–147. KELLER, P. (1984) Tsumeb, Namibia, eine der spektakulärsten Mineralfundstellen der |  | Beurlen, H., Thomas, R., Melgarejo, J. C., Da Silva, J. M. R., Rhede, D., Soares, D. R., Da Silva, M. R. R. (2013) Chrysoberyl-sillimanite association from the Roncadeira pegmatite, Borborema Province, Brazil: implications for gemstone exploration. Journal of GEOsciences, 58 (2) 79-90 | Journal (article/letter/editorial) | | to two centimeters across. It is associated with quartz and fibrolitic sillimanite along centimeter-thick...(Cbl) contains commonly small rounded inclusions of quartz and microscopic fibrous radial aggregates of sillimanite...Beryl + albite + muscovite + H+ = chrysoberyl + quartz + sillimanite + Na + K + H2O, seems to be the most...92). The origin of sillimanite + chrysoberyl + quartz under amphibolite-grade metamorphic conditions...late-tectonic recurrent increase in P–T conditions in the area. Another, less probable, alternative is a metastable |  | | Journal (issue) | | laboratories for producing rock sections up to 1¼q x l" area. This wiit employs a diamond impregnated cutting...Part 2General Features; Structural Analysis of the Area; S1Jmmary and Conclusions. By L. E. Weiss, B.Sc... Gneiss • 1. Transverse Profile of the Turoka Area • • • 2. Coulisse Profiles • • • • • •...Fig. 16 Map of Kenya showing Position of Turoka Area Fig. 17 Fig. 18 Macroscopic Structures from the...the Turoka Area (Mesoscopic Scale) . . . . . . . . Partial Diagrams from the Turoka Area (Macroscopic |
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