 | Macdonald, R., Marshall, A. S., Dawson, J. B., Hinton, R. W., Hill, P. G. (2002) Chevkinite-group minerals from salic volcanic rocks of the East African Rift. Mineralogical Magazine, 66 (2) 287-299 doi:10.1180/0026461026620029 | Journal (article/letter/editorial) | | Centre, Lancaster University, Lancaster LA1 4YQ, UK Department of Geology and Geophysics, University...of Edinburgh, West Mains Road, Edinburgh EH9 3JW, UK ABSTR ACT Electron microprobe analyses are presented... ilmenite, biotite, riebeckitearfvedsonite, aenigmatite, fluorite, a CGM, apatite and zircon. Hedenbe...to be replaced by riebeckite-arfvedsonite + aenigmatite + biotite CHEVKINITE-GROUP MINERALS TABLE...difficult to distinguish from aenigmatite optically and CGM may be more, and aenigmatite less, widespread in the |  | | Journal (article/letter/editorial) | | Geophysics, University of Edinburgh, EH9 3JW Edinburgh, UK ABSTR ACT Weakly peralkaline syenite ejecta within...titanite, eudialyte, a laÊ venite-like mineral and aenigmatite are present as accessories in some. The saturated/...oxide and 0 – 5% quartz. Apatite, titanite, aenigmatite, zircon, chevkinite-(Ce), pyrochlore, dalyite...mineral, Ttn = titanite, Ap = apatite, Ang = aenigmatite, Zrc = zircon, Chv = chevkinite-(Ce), Thr = thorite...apatite (Rønsbo, 1989; Oberti et al., 2001). Aenigmatite Aenigmatite is present in both syenite groups. It is |  | | Journal (article/letter/editorial) | | CESPAR, Open University, Milton Keynes MK7 6AA, UK [Received 4 February 2008; Accepted 12 May 2008]...(Macdonald et al., 2002), apatite and zircon. Aenigmatite has been reported from two rocks (Macdonald et...replaced by riebeckite-arfvedsonite K biotite K aenigmatite assemblages as the rocks become more peralkaline...Harris (1954) of a pitchstone from Ardnamurchan, Scotland. A chevkinite-(Ce) phenocryst in BL210b carries...magnetites of three rhyolitic pitchstones from Scotland. The preference of Ge (0.530 Å) for magnetite |  | | Journal (article/letter/editorial) | | a contribution to the adcumulus debate, 465 Aenigmatite minerals, phase relations in a syenitic ejectum...the, 617 Armenite, from the Middle Dalradian of Scotland, 135 Arsenic-silver, incompatibility in fahlore...Australia, 549 Coire Loch Kander, armenite at, Scotland, 135 Corlorado, metamunirite--a new anhydrous...from eastern Labrador, Canada, 173 ETmOPIA, aenigmatite minerals from a syenitic ejeetum, 529 Eudialyte...FORSYTH, D. M., 95 FORTEV, N. J., armenite from Scotland, 135 FOXFORD, K. A., the Panasqueira W-Cu-Sn deposit |  | | Journal (article/letter/editorial) | | Aegirine-augite, optical determination, 132 Aenigmatite, unit cell, formula, paragenesis, 986; Greenland...anal., X-ray, 949; Australia, anal., X-ray, 949; Scotland, anal., X-ray, 949; Pantel. leria, anal., opt...(T. R. D.), see DARNLEY (A. G), 48 Charnockite, Scotland, 903 Chevkinite, Arizona, Madarjascar, New ItamTsh~re... hydrothermal growth of, 974 Cossyrite, see Aenigmatite Craignurite, Mull, anal., petr. thermal history...(S. E.), A phosphatic calculus, 600 Enderbite, Scotland, anal., 903 ENGLISH (T. H.), see DAHNLEY (A. G |  | | Journal (article/letter/editorial) | | 69, 97-103 (1979) 9 by Springer-Verlag 1979 Aenigmatite, Sodic Pyroxene, Arfvedsonite and Associated...GeologicalSurveyof Japan, Kawasaki,Japan Abstract. Aenigmatite, sodic pyroxene and arfvedsonite occur as interstitial...patches in alkali dolerite, Morotu, Sakhalin. Aenigmatite is zoned from Ca, A1, Fe3+-rich cores to Ti,...4+ ~-~-2Fe3+, NaSi~CaA1 and M n 2 + ~ F e 2+. Aenigmatite replaces aegirine and ilmenite supporting the...'no-oxide' field in f o 2 - T space. In one case aenigmatite has apparently formed by reaction between ilmenite |  | | Journal (article/letter/editorial) | | nomenclature for the sapphirine group (formerly aenigmatite group) makes extensive use of precedent, but...two largest M sites, namely, sapphirine (Mg), aenigmatite (Na), and rhönite (Ca). Classification at the...which the dominant cation is most often Ti (aenigmatite, rhönite, makarochkinite), Fe3+ (wilkinsonite...not recommended. K EY WORDS : nomenclature, aenigmatite, sapphirine, surinamite, chain silicates. Statement...meteorite. We have chosen sapphirine rather than aenigmatite to name the supergroup and larger group therein |  | | Journal (article/letter/editorial) | | liquids are peralkaline and crystallized to aenigmatite and amphiboles which range in composition from...ferrorichterite, ferroactinolite, alkali feldspar, aenigmatite, quartz and zircon. Extreme differentiation of...demonstrated by the occurrence of quartz and aenigmatite in patch pegmatites and as intercumulus phases...of syenites by the appearance of intercumulus aenigmatite and ferrorichteritic amphiboles. Lower series...series (C35-C60) by the presence of intercumulus aenigmatite and sodic TABLE 1 Representative whole rock |  | | Journal (article/letter/editorial) | | of Werner Schreyer The crystal-chemistry of aenigmatite revisited: electron microprobe data, structure...structure refinement and Mössbauer spectroscopy of aenigmatite from Vesterøya (Norway) Edward S. GREW1, *, Ulf...Italy Abstract: The structure of an untwinned aenigmatite crystal from Vesterøya, Vestfold district, Norway... one of the four substitutions proposed for aenigmatite, Ca + IVAl () Na + IVSi, could be operating at...component, Na4Fe2+8Fe3+4Si12O40. Key-words: aenigmatite, sapphirine group, crystal structure, electron |  | | Journal (article/letter/editorial) | | only recently been properly identified (e.g. aenigmatite, botallackite, collyrite, freieslebenite, lettsomite...Cornwall; 2 from Somerset; 1 from Cheshire; 2 from Scotland; and 2 from Ireland). Geographical distribution...minerals: of the 287 minerals listed, 121 are from Scotland; 116 244 H. G. M A C P H E R S O N from England...64 are from England (48 from Cornwall); 35 from Scotland; 19 from Ireland; and 7 from Wales. The remaining...Pennines and northern England, Wales, Ireland, Scotland, etc. When this has been done the way ahead will |  | | Book | | Edition Andrew J. Barker University of Southampton, UK HANDBOOK OF Clinical Applications EDITED BY George...informa business © 2014 Taylor & Francis Group, London, UK Typeset by diacriTech Limited, Chennai, India Printed...section / Andrew J. Barker, University of Southampton, UK. pages cm Includes bibliographical references and...(1999), which are widely used by botanists in the UK. It involves a stepped sequence defining characteristic...of hornblende. Hornblende gneiss; Sleat, Skye, Scotland. c) Irregular but somewhat arranged fractures |  | | Journal (article/letter/editorial) | | [abstr.] Cannillo, E. The crystal structure of aenigmatite Carmichael, I. S. E. The free energy of sodalite...acid rocks in the Tertiary igneous province of Scotland Eberlein, G. Donald New occurrence of yugawaralite...acid rocks in the Tertiary igneous province of Scotland Erd, R. C. New occurrence of yugawaralite from...butlerite Fang, J. H. The crystal structure of aenigmatite Fang,J. H. Crystal structuresand mineral chemistryof...natural graphite Mazzi,F. The crystal structure of aenigmatite McBirney, A. R. Volcanic history of Honduras |  | | Journal (article/letter/editorial) | | arfvedsonite-aegirine trachyte from West Kilbride, Scotland WEST of Glasgow in the West Kilbride-Faidie district...Craig microgranite (Howie and Walsh, 1981), aenigmatite has not been detected, judging from the available...complex composition which might be in part altered aenigmatite, but the low Ti of the silicate grains does not...REFERENCES Geikie, A. (1903) Mere. Geol. Surv. Scotland (N. Arran etc.). Howie, R. A., and Walsh, J. N...and MacGregor, A. G. (1930) Mere. Geol. Surv. Scotland (N. Ayrshire). [Manuscript received 28 October |  | | Journal (article/letter/editorial) | | pantellerite. Of the ferromagnesian phenocrysts, aenigmatite is the most ubiquitous and is commonly associated...from slight variation in Ti/Fe d- Ti ratio, aenigmatite is virtually constant in composition. The pyroxenes...minerals which include pyroxenes, amphiboles, aenigmatite and tnhualites; the chemistry of the peralkaline...5 3.9 trace 3.1 5.5 0.8 . . -0.7 Pyroxene Aenigmatite Amphibole 0.1 0.1 . . trace 0.3 -- . . ...ratio as ERNST (1962) has synthesized a Ti-free aenigmatite, and the analyses compiled b y KEzs~Y and M c |  | | Journal (article/letter/editorial) | | groups. Appendix 3: Minerals discovered first in Scotland 5 5 6 7 9 10 11 11 12 13 39 44 47 SYNOPSIS...groups; and minerals which were discovered first in Scotland. Some 15 per cent of the species listed in this...knowledge as to which mineral species occur in Scotland, but that there is also a need for greater precision...to find the first recordings of minerals new to Scotland since 1901. Many authors have been unaware that...described had not been recorded previously for Scotland or the United Kingdom. The main criteria for accepting |  | | Journal (article/letter/editorial) | | Tenerife, anal., opt., 805; Greenland, anal., 737 Aenigmatite, Nigeria, anal., relation to rh6nite, 595 AGRELL...of migmatites in the Huntly-Portsoy area, N.E. Scotland, 66I ATANASOV (V. A.), Argentian mercurian tetrahedrite...LIVINGSTONE(A.), 441 Auchinstarry quarry, Kilsyth, Scotland, julgoldite, 76I Avondale, Auckland, New Zealand...posnjakite, brochantite, 893 BORLEY (G. D.), Aenigmatite from an AegirineRiebeckite granite, Liruei Complex...carnegieite, 487 Coire na Lochain, Cairn Gorm, Scotland, genthelvite, 637 Colle Ciarbonet, western Alps |  | | Journal (article/letter/editorial) | | of which is xenocrystic' (1) alkali feldspar, aenigmatite, ilmenite, apatite, Na-amphibole, quartz, and...suite from pigeonite- of acid igneous rocks Scotland. The low- and high-silica intrusives contain...Longridge Tuff contains both aenigmatite and a sodic amphibole. Aenigmatite is more siliceous Conrad'...cannot be simply derived by mixing the five aenigmatite •• end-members listed in Grapes et al. [1979]...coexistence of ilmenite, aenigmatite, and arfvedsonitic amphibole is notable. Aenigmatite is known to occur |  | | Journal (article/letter/editorial) | | TiSi4BeAlO20, a new beryllosilicate member of the aenigmatite-sapphirine-surinamite group from the Ilʼmen Mountains...530(100)(213), 2.410(28)(223), – 2.075(39)(411). Of the aenigmatite-sapphirine-surinamite group minerals, makarochkinite...makarochkinite. INTRODUCTION Four minerals of the aenigmatite-sapphirine-surinamite group (Strunz and Nickel...“makarochkinite” as a new mineral related to aenigmatite. This relation was subsequently conÞrmed by single-crystal...fully ordered at a single M site as it is in aenigmatite, then makarochkinite would be the Ti-dominant |  | Barbier, Jacques, Grew, Edward S., Hålenius, Elke, Hålenius, Ulf, Yates, Martin G. (2002) The role of Fe and cation order in the crystal chemistry of surinamite, (Mg,Fe2+)3(Al,Fe3+)3O[AlBeSi3O15]: A crystal structure, Mössbauer spectroscopic, and optical spectroscopic study. American Mineralogist, 87 (4) 501-513 doi:10.2138/am-2002-0413 | Journal (article/letter/editorial) | | related phases of the sapphirine series and aenigmatite groups, and the difference is linked to the unique...ET AL.: IRON AND CATION ORDER IN SURINAMITE aenigmatite group. The new refinement of the surinamite structure...the structures of Bebearing minerals of the aenigmatite group, such as “makarochkinite” (Yakubovich et...1998; Grew et al. 2000) or at South Harris in Scotland (Baba et al. 2000). A tetrahedral cation distribution...(Bonaccorsi et al. 1990), two minerals from the aenigmatite group with higher Fe3+/Fe2+ ratios than surinamite |  | | Journal (article/letter/editorial) | | pitchstone, INDEX Kirovsk, Kola peninsula: aenigmatite, 986 Ural mountains: chevkinite, 42 augite...apatite, ilmenite, pyrrhotine, stilpnomelane, 1032 SCOTLAND Reyerite, 821 Traprain Law, Haddingtonshire:...ARCTIC Greenland Kangerduguak, East Greenland: aenigmatite, 986 Narsarsuk: epididymite, 450 Niakornak: reyerite |  | | Journal (article/letter/editorial) | | in system CaMgSi~O6-CaFeSi~O6-NaFeSi206, 216. Aenigmatite, synthesis, X-ray, 253; Greenland and Kola, X-ray...Augite, India, anal., opt., cell-dimensions, 417; Scotland, anal., epitaxic growth on bronzite, I I5 ; Comores...mica, zo6. Epitaxic growth of augite on bronzite, Scotland, H5. Erebus, Antarctica, albite, anal., d2o i...Australia, authigenic feldspar in, 588. Gribun, Mull, Scotland, plumbogummite group, 935. Grossular, West Pakistan...Russ, Germany, gersdorffite, z6. Loch Don, Mull, Scotland, plumbogummite group, 934. - - Loch Feith an |  | Christy, A.G., Tabira, Y., Hölscher, A., Grew, E.S., Schreyer, W. (2002) Synthesis of beryllian sapphirine in the system MgO-BeO-Al2O3-SiO2-H2O and comparison with naturally occurring beryllian sapphirine and khmaralite. Part 1: Experiments, TEM, and XRD. American Mineralogist, 87 (8) 1104-1112 doi:10.2138/am-2002-8-907 | Journal (article/letter/editorial) | | macroscopic volumes of a 1A form isotypic with aenigmatite, Na2Fe5Ti[Si6O18]O2 (Cannillo et al. 1971; Merlino...these are three of several vectors relating aenigmatite-group compositions (Burt 1994). All samples of...because the 1A structure predominates in Si-rich aenigmatite-group minerals related to sapphirine. Instead...1999). In this chain, which is also found in aenigmatite-group minerals, two such sites share a corner...-quartz-K-feldspar gneiss at South Harris, NW Scotland. American Mineralogist, 85, 1474–1484. Bancroft |  | | Catalog/List | | Felc'spar/Analcime matrix. 2xl". £1. 50. 4. AENIGMATITE. Sandefjord, vestfold, Norway. Pure, riCh, dark...*x2-txl~". £3.25. ANGLESITE. Leadhills, Lanarkshire, Scotland. Small sharp spear like crystals to i;-" in length...HARMOTONE. Bellsgrove Mine, Stroncian, Argyllshire, Scotland. Specimen n Lustrous creamy sharp twinned crystals...each 2 mm. in size implanted on ~Egirine/Albite/Aenigmatite matrix. Itxltxl"_ £2.25. PVROLUSITE. Sidi-Avard...STRONTIANITE. Whitesmith Mine, Strontian, Argyllshire, Scotland. Rich, lime green coloured lustrous radiated masees |  | | Journal (article/letter/editorial) | | Icelandite and aenigmatite-bearing pantellerite from the McDermitt caldera complex, Nevada-Oregon Andy...caldera. The pantellerite tuff contains 1.5% aenigmatite phenocrysts. The high FeO*/MgO ratios of the...highly differentiated character of the unit. AENIGMATITE-BEARING PANTELLERITE TUFF A very thin unit of...feldspar and quartz (typically 25% to 30%), aenigmatite (1.5%), and clinopyroxene (<0.5%) underlies the...4), as well as the presence of phenocrystic aenigmatite (Sutherland, 1975) and groundmass TABLE 4. MAJOR- |  | | Book | | other localities in Greenland, Iceland, England, Scotland, Ireland and North America. The type localities..._D OTHER THAN ILiMAUSSAQ. l\'IGTUT AND NARSSARSS UK Albnite-iCe) Q:iqoruu:usiaq. Aluk BudnraldiLt...lki Islands, Jopan and Kangcrdluarsuq (Kungcrdlu=uk 'I) area or sou1hcm Gn:cnlnnd Thalackerile (lhalock1o...PHOTO GALLERY of Greenland Type-Minerals 0 0 Aenigmatite; crystal : 26 x 30 mm. The llimaussaq alkaline...F ll1ST DESCl1111ED FROM Gl1E E NLAND 25 Aenigmatite Triclinic, P1 (pseudomonoclinic, P2/n) NAME: |
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