 | Ottens, Berthold, Götze, Jens, Schuster, Ralf, Krenn, Kurt, Hauzenberger, Christoph, Zsolt, Benkó, Vennemann, Torsten (2019) Exceptional Multi Stage Mineralization of Secondary Minerals in Cavities of Flood Basalts from the Deccan Volcanic Province, India. Minerals, 9 (6) 351 doi:10.3390/min9060351 | Journal (article/letter/editorial) | | calcite (I) and zeolite (I) (including mordenite, heulandite, and stilbite) as well as plagioclase was overgrown...basalt was undertaken for for the the basalts of Iceland [19]. Later on the basalts provinces. Most Mostbasic...was undertaken basalts of Iceland [19]. studies Later studies on the of Iceland [11], Greenland [20,21]...Scotland [23], and[23], Northern Ireland basalts of Iceland [11], Greenland Faroe Islands Isle of Skye, Scotland...Savda region is unknown. Neuhoff et al. [9] estimated for basaltic lavas at Teigarhorn, Eastern Iceland |  | | Journal (article/letter/editorial) | | of clinoptilolite-Na → mordenite → heulandite, clinoptilolite-Ca, or epistilbite → stilbite, barrerite...veines: clinoptilolite-Na → mordenite → heulandite, clinoptilolite-Ca, ou epistilbite → stilbite, barrerite...13:13 1216 THE CANADIAN MINERALOGIST Parrsboro CA BL NAD AC A C K R RE MO OC EK RD K EN R NO TH ...as at Antrim, in Ireland (Walker 1960) and in Iceland (e.g., Neuhoff et al. 1999). The purpose of this...present include mordenite, apophyllite, quartz, heulandite and epistilbite. However, many amygdales are |  | | Journal (article/letter/editorial) | | Northern Iceland Thráinn Fridriksson a,*, Stefán Arnórsson b, Dennis K. Bird c a Iceland GeoSurvey...Grensásvegur 9, 108 Reykjavı́k, Iceland Institute of Earth Sciences, University of Iceland, Sturlugata 7, 101 Reykjavı́k...Reykjavı́k, Iceland c Department of Geological and Environmental Sciences, Stanford University, Stanford...Stanford, CA 94305-2115, USA b Received 22 October 2008; accepted in revised form 20 August 2009; available...Skagafjördur, a Tertiary tholeiitic flood basalt region in northern Iceland range between 0.10 and 28 ppb. Surface |  | | Journal (article/letter/editorial) | | in Tertiary basaltic lavas in the North Atlantic region indicate that individual zeolite minerals are distributed...magnitude in heulandite, resulting in an overall Sr enrichment of lavas in the heulandite-stilbite zeolite...tetrahedrally coordinated Si and Al (Al tetrahedra adjoin Ca sites). Four distinct water sites are present (labeled...zeolite deposits, such as those in the North Atlantic region, are among the most common occurrences of these...represents interchannel cations (such as Na+, K + , Ca +2 , Ba +2 , Sr +2 , Cs + , and Mg +2 ), B are tetrahedrally |  | | Journal (article/letter/editorial) | | basalts of Salsette Island in the greater Mumbai region, as well as in other localities in the Deccan Volcanic...unique geological environment. The greater Mumbai region is built up by the Salsette subgroup, which represents...conditions and precipitation of okenite I, scolecite, heulandite, stilbite, and finally chabazite I, in the temperature...contrast, the basalts in the Mumbai (formerly Bombay) region erupted in a lagoonal to shallow marine environment...Amygdaloidal tholeiitic basalt occupies most of the eastern part of the island, whereas spilitic basalt with |  | | Journal (article/letter/editorial) | | weisenberger@minpet.uni-freiburg.de) ABSTRACT Six different Ca-zeolite minerals are widespread in various assemblages...zeolite-bearing fissures: (i) in the central and eastern part of the Aar- and Gotthard Massifs; (2) Gibelsbach...and scolecite are abundant and common, whereas heulandite, chabazite and epistilbite occur occasionally...extra-framework cation, with minor K and Na. Heulandite and chabazite contain Sr up to 29 and 10 mol...assemblages and equilibrium calculations show that the Ca-dominated zeolites precipitated from fluid with decreasing |  | | Journal (article/letter/editorial) | | gneiss and granite have the potential to precipitate Ca–zeolite. This is an important find because many fluids...found to be oversaturated in respect to a number of Ca–zeolite species. Vein formation during late uplift...formation of Ca–Al silicates. The water–rock interaction is associated with a depletion of Al, Si, Ca, Fe and...reactions are predominantly chlorite, K-feldspar and Ca–Al silicates such as epidote, prehnite or zeolite...2001; Neuhoff et al. 1999; Walker 1960, 1963). Low-T Ca–Al-silicates have been reported from gneiss and granite |  | | Journal (article/letter/editorial) | | Earth Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland Received 13 January 2011; accepted...<6.5), SiO2 and simple Al–Si minerals, Ca–Mg–Fe smectites and Ca–Mg–Fe carbonates predominated. Iron, Al...Al and Si were immobile whereas the Mg and Ca mobility depended on the mass of carbonate formed and water...mineralization, the pH increased to >8 resulting in Ca–Mg–Fe smectite, zeolites and calcite formation, reducing...composition of the carbonates depended on the mobility of Ca, Mg and Fe. At pH <6.5, Fe was in the ferrous oxidation |  | | Book | | to 15 mm ("/» in) come from Konder in Khabarovsk Region, small crystals, but mainly nuggets, weighing up...aggregates are found in Sri Lanka (Radegara, Galle region). Accumulations in Buckingham and Grenvillc, Quebec...Austria and from the deposits in the Tri State region, Missouri, USA. Crystals up to 10 mm ('/» in) occurred...Kladno, Czech Republic; similar from localities in Eastern Pennsylvania, USA and near Ste-Etienne, France...Perovskite Perovskite, 60 mm, Zlatoust, Russia (Ce,Na,Ca)TiOj ORTHORHOMBIC • Properties: C - black, S - |  | | Book | | content in framework aluminosilicates is always (Ca + Mg+ Ba + NaZ+ KZ)/AI = 1. Zeolites differ from...molecules. The general formula for a zeolite mineral is (Ca,NaZ,KZ,Ba,Sr,Mg,CsZ,LiZ)a[AlaSi n_a 0Zn] •xHZO The...counterbalanced by adding positively charged cations (Ca, K, Na, Li, Mg, Sr, Ba, Cs) to produce an electrically...zeolites such as analcime, chabazite, stilbite, and heulandite can be easily identified, named, and cataloged...ratio can be written, for example, as silica-rich heulandite rather than clinoptilolite. Descriptive modifiers | | | Book | | content in framework aluminosilicates is always (Ca + Mg+ Ba + NaZ+ KZ)/AI = 1. Zeolites differ from...molecules. The general formula for a zeolite mineral is (Ca,NaZ,KZ,Ba,Sr,Mg,CsZ,LiZ)a[AlaSi n_a 0Zn] •xHZO The...counterbalanced by adding positively charged cations (Ca, K, Na, Li, Mg, Sr, Ba, Cs) to produce an electrically...zeolites such as analcime, chabazite, stilbite, and heulandite can be easily identified, named, and cataloged...ratio can be written, for example, as silica-rich heulandite rather than clinoptilolite. Descriptive modifiers |  | | Book | | friable masses monoclinic (Al,Mg) [(OH) SisO;0] « (Na,Ca),. . 4H,O Kuzmice, Czechoslovakia white, grey, green...CARNALLITE KMgCl; .6H,O Stassfurt, Germany INYOITE Ca[B;03(OH)s] . 4H Mount Blanco on Furnace Creek,...eliminated from soda lakes, in clays GAYLUSSITE Na»Ca(COs3)o . 5H,O (Natrocalcite) Sangerhausen, Germany...rare in ore deps. WHEWEL- calcite Kladno, LITE Ca[C,0,4] . H,O Czechoslovakia Hardness 3—3.5 CALCITE...(Calcareous Spar) Helgustadir, Reydarfjérdur, Iceland CALCITE CaCOs (Calcareous Spar) Cumberland, England |  | | Book | | 1.6 Laumontite 4.11.2 Flaky zeolites 4.11.2.1 Heulandite 4.11.2.2 Stilbite 4.11.2.3 Epistilbite 4.11.3...Disseminated graphite. Graphitic phyllite. East of Banos, Eastern Cordillera, Ecuador. Uncrossed polarizers. Colour:...minerals and amorphous substances 2.1 Perovskite (Ca, Na, Fe 2+, Ce, Sr) (Ti, Nb)03 pseudo-cubic (rhombic-dipyramidal)...an early crystal phase in silica undersaturated, Ca-rich igneous rocks (Fig. 38), in particular in melilite-bearing...serpentine and titanaugite; Pyrochlore and koppite (Na, Ca)zCNb, Ti, Ta)206(OH, F, 0) cu bic-hexaoctahedral |  | | Book | | fine-grained mass. The rock illustrated is from a region near Oslo, Norway. Samples of it were brought to...first described) or after a landscape, county, or region in which the type locality was situated. Aragonite...+ + + Sa ! / e + + + + + + 4 t+ + ca ai + + J i I + & ¢ + e + + + + + <... Aluminium (Al) Iron (Fe) by weight. Calcium (Ca) Sodium (Na) Potassium (K) Magnesium (Mg) Others...and a covalent bond. @ee--@ The ionic bond K Ca Mg Na Fe Al Si forces that bind the atoms |  | | Book | | 15 mm (1 9h2 in) come from Konder in Khabarovsk Region, small crystals, but mainly nuggets, weighing up...aggregates are found in Sri Lanka (Radegara, Galle region). Accumulations in Buckingham and Grenville, Quebec...Austria and from the deposits in the Tri State region, Missouri, USA. Crystals up to 10 mm (3/s in) occurred...con1e from Navajun, Spain. Large deformed crystals Ca/averite, 21 mm, Nagyag. Romania Pyrite, 74 mm,...Kladno, Czech Republic; similar from localities in Eastern Pennsylvania, USA and near Ste-Etienne, France |  | | Book (edition) | | more structural sites, e.g. jahnsite(~fa). jahn ite-(Ca.\1nMn). etc. Other examples are pump~U);te-(Fe:,...or numerous zeolites. e.g. gmelinite- a. gmelinite-Ca, etc. For the fonnerly used prefixes such as Greek...both enclosed in square brackets, e.g. fluorapatite Ca[Fl(PO 4)3] or euchroite 0.1 2[OHIAsO 4]•3H 2O. This...abbreviated, e.g. canton (Switzerland), vilayet (Turkey), region (Chile), kray and oblast (Russia). The country...changes of administrative divisions in central and eastern Europe during the last 60 years are the reason |  | | Book | | albite (Na,Ca)(Al0.)x (Si0.)y 1y>29 can contain up to 10% anorthite oligoclase (Na,Ca)(Al0>)x (Si0...monoclinic series in comparison with andesine (Na,Ca)(Al02)x (Si0.)y 13y>25 contains 30% to 50%...5>y>2.3 contains 50% to 70% anorthite bytownite (Na,Ca)(Al0.)x (Si0.)y The introduction of calcium into...and anorthite Ca(Al0,),(Si0,), ions, Ca2*, and the carbonate groups, anorthite (Na,Ca)(Al0,)x (Si0.)y...0¢ and orthoferrosilite Fe,Si,0, labradorite (Na, Ca)(Al0.)x (Si0.)y We have seen how the systematic |  | | Book | | tilisatio n des fo nnules structura les d a ns les ca lcul s analytiques.. . . . . . Utilisation des pa...gazeux (sublimation). La courbe de fusion separe la region correspondant a l'etat solide de celle correspondant...ne sont plus nettement differencies ; c'est la region de l'etat fluide. L'etat liquide presente des caracteres...des bases et des sphenoedres. Tres rare. Cahnite Ca 2 (AsO 4 )[B(OH)4 ]. Systeme hexagonal Un seul type...coordination par rapport a l'oxygene, d'autres comme Al, Ca, Na, Zn, etc ... en ont deux car le rapport de leur |  | | Book (edition) | | Anions tl Na, K, Li, Ag, Cs, H 1 F, Cl, Br, I +2 Ca, Mg, Ba, Zn,’'Be, Sr, Cd —2 O +3 Al, B 2; a8...crystals of siderite, chabazite, apophyllite, heulandite, pyrite and arsenopyrite. Cavernous and “Hopper”...growth OF a Some crystals die out CRYSTALS IN CA Vy WOON NANO Only a few crystals remain DRUSES... 7 o(lll) CUBIC OCTAHEDRAL SPHALERITE = HEULANDITE DODECAHEDRAL A> oe PINACOIDAL CALCITE TOPAZ...present in crystals of calcite, gypsum, sphalerite, heulandite, tite, spodumene, fluorite, etc. apophyllite | | | Book (edition) | | 197 201 207 209 232 238 0 F Na Mg Al Si p s Cl K Ca Ti V Cr Mn Fe Co Ni Cu Zn As Se Br Sr Zr Nb Nfo Ag...neatly disposed of by ionic bonds to the calcium (Ca + 2) ions, which space themselves evenly throughout...Charge +l +2 +3 +4 +5 +6 Na, K, Li, Ag, Cs, I-I Ca, Mg, Ba, Zn, Be, Sr, Cd Al, B Si, Zr, Th Ta -1 ...crystals of siderite, chabazite, apophyllite, heulandite, pyrite and arsenopyrite. Cavernous and "Hopper"...(100) o(l 11) ~zIS CUBIC OCTAHEDRAL SPHALERITE HEULANDITE b(0I0) I (20 1) DODECAHEDRAL CALCITE PINACOIDAL |  | | Book (edition) | | chalcopyrite. Sheens: pearly, talc, apophyllite, heulandite, 1nica; schiller, hypeTsthene; a\·enturescence...albite, nepheline, sodalite, scapolite (crystal), heulandite (crystal), stilbite, serpentine (massive and...H 1 Li Be B C N 0 F Na I\,1 g Al Si p s Cl K Ca Ti V Cr 11n Fe Co Ni Cu Zn As Se Br Sr Zr Nb }.l...neatly disposed of by ionic bonds to the calcium (Ca+ 2) ions, which space themselves evenly throughout...CALCIUM ATOMS CARBON ATOMS marki ng the centers of each ca rbonate radical. One of the latter, greatly enlarged |  | 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) | | published by Aleph Enterprises, Box 213, Livermore, CA 94551; and GEOREF the bibliographical reference compelation...Mexico Central America and the Caribbean Greenland Iceland European countries, from west to east Asia, including...Tennessee Texas Utah Vermont Virginia AL AK AZ AR CA CO CT DE FL GA HI ID IL IN IA KS KY LA ME MD MA MI...Winnemucca(*), Humboldt Co., NV; many localities in CA, especially in the Mother Lode belt in Mariposa,...(Verespatik). In Russia, gold is found on the eastern slope of the Ural Mts. for a distance of 500 miles |
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Teigarhorn, Berufjörður, Djúpavogshreppur, Múlaþing, Eastern Region, Iceland