 | | Journal (article/letter/editorial) | | P P 375-379 Crystal chemistry of danalite from Daba Shabeli Complex (N Somalia) P. Nimis G. Molin D....altered alkali granites have also been reported. Danalite is rarer than helvite (Mn endmember) and genthelvite...that there is no crystal-chemical reason for pure danalite not being stable and that complete miscibility...end-members. The apparently restricted stability of danalite in natural environments is probably controlled...controlled by sulphur and oxygen fugacities, danalite being replaced by pyrite- or pyrrhotite-bearing assemblages |  | | Journal (article/letter/editorial) | | alkaline ultramafic Inagli complex, 711 Alkaline, potassic ultramafic Inagli complex, eastern Siberia, geochronology...geochronology and mineral chemistry, 711 Alkaline complex, at Little Murun, Aldan Shield, Russia: compositional...275 BRYON,D. N., 163 BUSECK, P. R., 799 Bushveld complex, compositional cyclicity in a pyroxenitic layer...and titanites from the Deadhorse Creek diatreme complex, northwestern Ontario, 403 Cancrinite, thermal...Orefield, 317 Cathodoluminescence, used to show complex zonation in metasomatic apatites from the North |  | | Journal (article/letter/editorial) | | Zn8[Be6Si6O24]S2, from the alkaline intrusive complex at Mont SaintHilaire, Quebec, where genthelvite...The end members have Zn in genthelvite, Fe2+ in danalite, and Mn in helvine, which is the IMA-approved...helvine and genthelvite do occur naturally, but danalite contains a maximum of about 86% of the Fe end-member...Mel’nikov et al. (1971), and all three (including danalite) by Fursenko & Klyakhin (1981) and Fursenko (1982)...among the three end-members. The lack of pure danalite in nature may simply indicate that another phase |  | | Journal (article/letter/editorial) | | 3749/canmin.1600066 GENTHELVITE OVERGROWTHS ON DANALITE CORES FROM A PEGMATITE MIAROLITIC CAVITY IN CHEYENNE...includes epitaxial genthelvite overgrowths on danalite cores. The cavity was lined with white microcline...10 cm in size. In addition to the genthelvite/danalite, accessory columbite-(Fe), ilmenite, and bastnäsite-(Ce)...beryl. The epitaxial overgrowths of genthelvite on danalite are particularly unusual because these two minerals...pocket forming stage resulted in the change from danalite to genthelvite crystallization. Increasing f O2 |  | | Journal (article/letter/editorial) | | References Burt, M.D. (1980) The stability of danalite, FeaBe3(SiO4)3S. Amer. Mineral., 65, 355-60. Hassan...(1986) The compositional variation and genesis of danalite in Sn-F-W skarns, NW Tasmania, Australia. Neues...16, 486. Vison/l, D. (1993) The Daba Shabeli gabbro-syenite complex: an element of the gabbro belt in...Mineralogical Society KEVWORDS:danalite, Daba Shabeli Complex, Somalia, crystal chemistry MINERALOGICAL..., California, USA Eugene E. Foord THE 100 Ma complex LCT-type composite pegmatite-aplite dykes, intruded |  | | Journal (article/letter/editorial) | | M cations where M = Zn2+ (genthelvite), Fe2+ (danalite), and Mn2+ (helvine). The latter was formerly...helvite. Helvine is the most common, follow by danalite, and genthelvite is by far the rarest. Helvine-group...genthelvite, = danalite, and = helvine) a crustal coating around D38H33. Zoned genthelvite DD = danalite, and HH...genthelvite occur naturally, but danalite is about 86% of the Fe2+ endmember. Danalite is the only endmember that...pure danalite in nature may indicate that another phase may be more stable relative to danalite. Pure |  | | Journal (issue) | | mineralization in a rediscovered pegmatite in the Stettin Complex, Wausau Syenite Compley, Marathon County, Wisconsin...containing epitaxial overgrowths of genthelvite on danalite cores…………………………………………………………………………………………………………………...nepheline syenite pegmatites in the Larvik plutonic complex, Oslo Rift, Norway…………………………………………………………………………135...al., 2017). In either case, they form part of a complex continental crust with a long evolutionary history...from the Storgangen intrusion, Rogaland Intrusive Complex, SW Norway: Implications for the composition and |
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