 | | Journal (article/letter/editorial) | | 1978 An aenigmatite-richterite-olivine trachytefrom Puu Koae, WestMaui, Hawaii DeNtnlln Vnlon Laboratoirede...Abstract The Puu Koae trachyteforms a conspicuousbulbous dome on the north shoreof West Maui. This trachyte...evolutionof the islandof Maui. Introduction Description The geologyof West Maui has been describedby Stearns...Stearns and Macdonald (1942). West Maui is a mainly basalticvolcano,the rocksof which, known as the Wailuku...volcanic series (Macdonald and Katsura, 1964).The Puu Koae trachyte,the subjectof this note, belongsto the |  | | Journal (article/letter/editorial) | | Springer-Verlag 1994 Printed in Austria Potassium-fluor-richterite in metacherts from the Bufa del Diente contact-metamorphic...accepted June 9, 1993 Summary Potassium-fluor-richterite is reported from wollastonite-rimmed metachert...KNaCaMgsSisO22(F)z + 4 Ca2NaH(SiO3)3 + 8 HClaq K-F-richterite + pectolite Compositional ranges in two samples...that Cacontaining fluids cannot coexist with richterite and that Ca is incorporated into amphibole as...Metaquarzite enthalten Kalium- und Fluor-reiche Richterite. Die K-FRichterite bildeten sich durch Reaktion |  | | Journal (article/letter/editorial) | | limited trends, amphibole varying from ferro-richterite to arfvedsonite and pyroxenes along the acmite-hedenbergite...2); and (2) relatively reduced cores of ferro-richterite surrounded by two to three rims of arfvedsonite...As a whole, the amphibole evolved from ferro-richterite to arfvedsonite, de ning an alkaline trend marked...Small squares: alkali amphibole end-members (RIC: richterite; ARF: arfvedsonite; RIE: riebeckite), after Giret...value of 5.3% obtained in the Puukoae trachytes of Hawaii (Velde, 1978), but resembles the one from the trachytes |  | | Journal (article/letter/editorial) | | mechanisms of formation for MARIDtype rocks. K-richterite is stable in a wide range of bulk K/Na ratios...At P >7·0 GPa, K-richterite can coexist with garnet. Phase relations of K-richterite in a natural MARID...system and confirm the potential stability of K-richterite and Krichterite + garnet within the diamond stability...stability field. The assemblage K-richterite + phlogopite + clinopyroxene is incompletely buffered in...exceptions they are represented by K-rich varieties of richterite NaCaNaMg5Si8O22(OH)2, katophorite NaCaNaMg4– |  | | Journal (article/letter/editorial) | | Bryand Research Center, Orono, 04469-5790 Maine, USA 2 Department of Mineralogy, Swedish Museum of Natural...triclinic mineral ‘cossyrite’ in volcanic rocks of the island Pantelleria, southern Italy (Cossyra in ancient...Proterozoic rocks in the Caledonides, Nordland County, Norway (Grauch et al. 1994; Burt 1994). The mineral...for Serendib, the old Arabic designation for this island. Ye. N. Belova (in Pertsev and Nikitina, 1959)...sapphirine, to date only found at Johnsburg, New York, USA (Grew et al., 1992), contains significantly more B |  | | Book | | of Chicago 5734 S. Ellis Avenue Chicago IL 60637 USA Dr. WILLIAM L. BROWN CRPG Centre National de la Recherche...identified from Table 3.1 50 Order-Disorder The Lake County labradorite with a, b, c and e diffractions is...Or51Ab4SAnl' from Rabb Canyon pegmatite, Grant County, New Mexico (Keefer and G E Brown 1978) for which...contours for M site of selected plagioclases: Mitchell County pegmatite (Phillips et al. 1971), Hogarth Range...flows at the Sulphur Bank quicksilver mine, Lake County, California. It is named after the petrologist |
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