 | | Journal (article/letter/editorial) | | Grandidieriteof contact-metamorphic originfrom Maratakka, northwestSurinam Euoxo W. F. or Rorvnn GeologischM...pyroxene-hornfels-facies xenolithsin a gabbroicintrusion at Maratakka,northwestSurinam. Introduction Occurrence Grandidierite...body, a few kilometersin size, gabbroicbodyat Maratakka(5" 11,37,,N, 56"54,16" surroundedby granite,presumablywith...herwith a hornfelsof tive. The combinationof tourmaline-like granoblastic andesine andpoikiloblastic...grandidierite is uncertain (Black, 1970). At Maratakka the only evidence of boron metasomatismmight be |  | | Journal (article/letter/editorial) | | similar xenoliths do not contain grandidierite (nor tourmaline nor any other boron mineral) make it improbable...from primary tourmaline, either directly by a high-temperature transition of tourmaline into grandidierite... 345. Mt. Amiata (Italy) Mt. Cimino (Italy) Maratakka (Surinam) Tizi-Ouchen (Algeria) Blanket Bay (Cuvier...(Brewer et al., 1979). Here grandidierite and tourmaline occur sporadically in an originally low-grade...grandidierite as a high-temperature breakdown product of tourmaline. For the formation of grandidierite, reaction |  | | Report (issue) | | corundum, sillimanite, andalusite, cordierite, tourmaline, kornerupine, sapphirine, serendibite, sinhalite...on Madagascar. In the Kachebere Hills, Mchinji district, Malawi. From Tizi-Ouchen, B¶ejaia, Algeria. From...on Almjotheia, 12 km north of Moi, Norway. At Maratakka, Surinam. On Cuvier Island, New Zealand. Known |  | | Journal (article/letter/editorial) | | associations occur: (1) At McCarthy Point, 1-10 mm thick tourmaline-kornerupine-grandidieritelayers are hosted within...McCarthy Point, grandidierite, kornerupine and late-tourmaline growth predates, or is synchronous, with F3 fold...presence of excess B203 and H20, alkali-free tourmaline decomposes to grandidierite-quartz at temperatures...product phase from the degeneration of alkali-free tourmaline at fluid pressures of between 1 and 2 kbar at...experimental charges from degeneration of Mg-rich tourmaline (dravite) at 895~ and 5 kbar. Seifert (1975) |  | | Journal (issue) | | alluvial sapphires from Russia’s Jewish Autonomous District. 266 A New Deposit of Gem-Quality Grandidierite...spinel from Madagascar • Sphalerite in topaz • Tourmaline termination • Quarterly crystal: Axinite in quartz...JAPAN CHINA 0 50 km Figure 2. The Sutara mine district is located in the Jewish Autonomous Region (Russian...are present as biotite granites, biotite and tourmaline leucogranites, veins of granitic pegmatites,...diorite, granite, skarn ORDOVICIAN Biotite and tourmaline leucogranite, granitic pegmatite CAMBRIAN Aleurolite |  | | Report (volume) | | (Anovitz and Grew, Chapter 1) Tourmaline group. In addition to four new tourmaline species, a new classification...classification has been proposed. Another tourmaline, olenite, has been shown to contain substantial amounts...a finding that has revolutionized our view of tourmaline crystal chemistry (Werding and Schreyer, Chapter...IMA-approved and synthetic tourmaline species Chapter 11. Table 1, p. 561: Selected tourmaline-bearing tin +/- tungsten...replacements Chapter 11. Table 2, p. 569: Selected tourmaline-bearing breccia pipes and porphyry deposits Chapter | | | Report (volume) | | IMA-approved and synthetic tourmaline species Chapter 11. Table 1, p. 561: Selected tourmaline-bearing tin +/- tungsten...veins, Chapter 11. Table 2, p. 569: Selected tourmaline-bearing skarns and replacements breccia pipes...Selected tourmaline-bearing vein deposits in metamorphic Chapter 11. Table 4,p.581: Selected tourmaline-bearing...granitic magmas: The importance of tourmaline...... 303 Stability of tourmaline at subsolidus conditions .................0.csceeeeeee ees 303 Reaction of tourmaline at the onset Of anatexis 0.0.5... .....0cds.ceesedsnesveee |  | Gaines, Richard V., Skinner, H. Catherine W., Foord, Eugene E., Mason, Brian, Rosenzweig, Abraham, King, Vandall T. (1997) Dana's New Mineralogy (8th ed.) Wiley-Interscience. p.1872 | Book (edition) | | Co., Bonanza mine, Trinity Co., Michigan Bluff district, Placer Co., in AK, placers at Fairbanks, Iditarod...and quartz veins at Juneau. In Canada, Noranda district, PQ; Porcupine, Kirkland Lake, and Larder Lake...deposits, ON; Atlin and Caribou, BC; and Klondike district, YT. In Mexico, Altar and Magdalena, SON; Parral...localities, AZ; Calico district, San Bernadino Co., Cerro Gordo(*), Inyo Co., Bodie district, Mono Co., and other...in CA. In Canada, at Cobalt(*) and Thunder Bay district, ON, Highland Bell mine(*), Beaverdell, BC, and |
|
