 | Ertl, A., Rossman, G. R., Hughes, J. M., London, D., Wang, Y., O'Leary, J. A., Dyar, M. D., Prowatke, S., Ludwig, T., Tillmanns, E. (2010) Tourmaline of the elbaite-schorl series from the Himalaya Mine, Mesa Grande, California: A detailed investigation. American Mineralogist, 95 (1) 24-40 doi:10.2138/am.2010.3271 | Journal (article/letter/editorial) | | Tourmaline of the elbaite-schorl series from the Himalaya Mine, Mesa Grande, California: A detailed investigation...and Planetary Sciences, California Institute of Technology, Pasadena, California 91125-2500, U.S.A. 3 Office...from gem pockets in the Himalaya mine, San Diego County, California, including a strongly color-zoned...Mn-bearing “oxy-schorl.” The grayish-yellow, intermediate zone is Mn-rich “fluor-elbaite” that contains...content with ~6 wt% MnO. The nearly colorless “fluor-elbaite” rim has the highest Li content of all zones. There |  | | Journal (article/letter/editorial) | | Center, 100 East Boyd Street, Norman, Oklahoma 73019, USA Abstract Experiments with tourmaline-group minerals...tourmaline-group minerals (solid solutions among schorl, dravite, olenite, foitite and, to a lesser extent...granulite facies. However, the stability field of elbaite, the most common Li-rich species, is not known...habituelles (solutions solides impliquant les pôles schorl, dravite, olénite, foïtite et, à un degré moindre...case in point is tourmaline from the Himalaya mine, California. The Na and F contents of tourmaline increase |  | | Journal (article/letter/editorial) | | (+1 or +2) or is vacant (zero charge). There are three Y-site cations, which can have charges of +1, +2...Because of local bonding of the O(1)-site anion to three neighboring Y-site cations and an X-site cation...However, local bond-valence arrangements for the three Y-site cations most commonly have a cumulative local...(Hawthorne 2002). Nonetheless, local charges at the three Y-site cations as low as +5 (e.g., Li2Al) and as...____________________ Alkali group Schorl Fluor-schorl “Oxy-schorl”* Dravite Fluor-dravite “Oxy-dravite”* |  | | Journal (article/letter/editorial) | | green Cu-bearing tourmalines from the da Batalha mine in Paraiba state, northeastern Brazil (Koivula and...been mined from other deposits near the da Batalha mine (Fig. 1) in the neighbouring state of Rio Grande...2007). The Mavuco (or Chalaua) mine in the Alto Ligonha pegmatitic district, Mozambique, is the world’s...Table 1 gives the chemical compositions (mean of three determinations) and formulae calculated with the...State, Brazil, showing the location of the Batalha mine (modified from Soares et al., 2007). Isotope ratios |  | | Journal (volume) | | considered as “puzzling” rocks. In the following three aspects regarding pegmatite classification and genesis...example a 14-m-long spodumene crystal from the Etta mine in the Black Hills, South Dakota and an 18-m-long...temperature at which pegmatites crystallize may have little or no direct relationship to the conditions of...Mineralogical Association of Canada Short Course Series 44, 257-304. Simmons, W.B. & Webber, K.L. (2008):...must involve a more complex and interdependent series of processes beside simple fractionation in order |
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