 | | Journal (issue) | | Switzerland Famous mineral localities: zeolites from Iceland and the Faeroes .................................written on by every generation o f mineralogists. Iceland and the Faeroes have pro duced huge amounts o... An atypically sunny day near Helgusta5anama, Iceland; Holmatindur (Holma Peak) near ReySarfjorSur is...January-February, 1981 5 INTRODUCTION In the region of the North Atlantic, vast areas of the land and...Province. These basalts, visible in eastern and western Greenland, Iceland, Jan Mayen, the Faeroes, Scotland |  | | Journal (article/letter/editorial) | | Science Institute, University of Iceland, Dunhagi 3, 107 Reykjavik, Iceland (Received October 30, 2000; accepted...compositions of stilbite SS in Tertiary metabasalts in Iceland and Icelandic geothermal systems change systematically...compositional-relations in metabasalts at Berufjördur, Iceland, measured temperatures of zeolite mineral distribution...metabasalts of Iceland, as well as the observed temperature of the stilbite SS to laumontite (leonhardite)...zeolite paragenesis in active geothermal systems in Iceland, were used to supplement calorimetric and phase |  | | Journal (article/letter/editorial) | | cowlesite, epistilbite, gismondine, goosecreekite, laumontite, stellerite, wairakite, and yugawaralite. Scolecite...minerals. Scolecite is apparently not abundant in the eastern United States. It occurs as small white radial...pink 15-cm scolecite spray with associatedwhite laumontite crystals from Nashik, Maharashtra, India. Dr...aggregates with heulandite, stilbite, epidesmine, laumontite, and apophyllite in basalt in the Kosmos area...Lane County, Oregon. The Canadian Atlantic coastal region is well known as a source of excellent zeolite |  | | Journal (article/letter/editorial) | | in Tertiary basaltic lavas in the North Atlantic region indicate that individual zeolite minerals are distributed...NEUHOFF ET AL. FIG. 1. Crystal structure of laumontite (Table 1). after Armbruster and Koliler (1992)...zeolite deposits, such as those in the North Atlantic region, are among the most common occurrences of these...o l i t e , s c o l e c i t e , yugawaralite, laumontite, and wairakite to variations of up to 5 0 % in...Ca (Na, K, Sr) ~ 2 . 8 5 - ~3.15 ~1.80-2.35 laumontite yugawaralite LAU CaAl2Si4O12• 2H 2 O CaAl |  | | Journal (article/letter/editorial) | | K. H. Scheumann:3 Heulandite from Berufiord, Iceland. 1Hdb. Mineralchemie, II, 3, (1921), p. l7l. 2...analysis (P5 in Fig. 5) of ptilolite from Teigarhorn, Iceland,ll has the same ratio as found in mordenite;it...Natrolite Mesolite Scolecite Edingtonite Gismondite Laumontite Heulandite Mordenite Epistilbite Brewsterite...Heulandite Epistilbite Brewsterite Stilbite Harmotome Laumontite Chabazite Levynite Scolecite Edingtonite Feldspar...solutions and by their difierences of symmetry. 3. Laumontite is probably a short isomorphous series of the |  | | Journal (article/letter/editorial) | | diagram are shown the variations of composition of laumontite and of gismondite, as well as the approximately...composition in gismondite, laumontite, heulandite, mordenite, and ptilolite. Laumontite and gismonditevary a...A.: Mi'n. Abst., vol. 4, p. 320,1930. 46. Teigarhorn,Iceland. Cavinato, 4..: loc. cit. 47. Maderanertal...cit. 44. Bombay,India. Hey, M.H.: loe. cit. 45. Iceland,Hey, M. H.: loc.cit. 46. Bombay,India. Hey, M.H |  | | Journal (article/letter/editorial) | | Science Institute, University of Iceland, Dunhaga 3, 107 Reykjavík, Iceland Reykjavík Energy, Baejarhálsi...Baejarhálsi 1, 110 Reykjavík, Iceland Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley CA 94720...and compared to observed basalt alteration in Iceland and Greenland. Overall simulated and observed alteration...Reykjavík Energy, Baejarhálsi 1, 110, Reykjavík, Iceland. Tel.: +354 516 6992; fax: +354 516 6709. E-mail...CO2 mineral sequestration. Natural analogs from Iceland and Greenland were used to identify primary and |  | | Journal (article/letter/editorial) | | pages 277–287, 2003 Hydrogen-bonded water in laumontite I: X-ray powder diffraction study of water site...site occupancy and structural changes in laumontite during room-temperature isothermal hydration/dehydration...Mexico 87545, U.S.A. ABSTRACT The response of the laumontite crystal structure to hydration/dehydration was...discontinuous, as manifested by the presence of two laumontite phases during hydration and dehydration. Unit-cell...Unit-cell parameters of the two coexisting laumontite phases observed under these conditions are consistent |  | Neuhoff, Philip S., Rogers, Karyn L., Stannius, Lotte S., Bird, Dennis K., Pedersen, Asger K. (2006) Regional very low-grade metamorphism of basaltic lavas, Disko–Nuussuaq region, West Greenland. Lithos, 92 (1) 33-54 doi:10.1016/j.lithos.2006.03.028 | Journal (article/letter/editorial) | | metamorphism of basaltic lavas, Disko–Nuussuaq region, West Greenland Philip S. Neuhoff a,⁎, Karyn L...tholeiitic lavas, occurring widely throughout Iceland (e.g., Walker, 1960b; Neuhoff et al., 1999), the...(Sukheswala et al., 1974) and the Blosseville Kyst region of East Greenland (e.g., Fawcett et al., 1966;...tholeiitic lavas hosting active geothermal systems in Iceland (Kristmannsdóttir and Tómasson, 1978). Compositional...equivalent metamorphic grades. A unique aspect of this region is the presence of reservoir-scale petroleum accumulations |  | | Journal (article/letter/editorial) | | zeolite-bearing fissures: (i) in the central and eastern part of the Aar- and Gotthard Massifs; (2) Gibelsbach...different zeolites is limited to six species: laumontite, stilbite and scolecite are abundant and common...order (old to young = hot to cold): scolecite, laumontite, heulandite, chabazite and stilbite. The necessary...particularly at low temperature. Key words: granite; laumontite; Swiss Alps; water–rock interaction; zeolite...H2O = laumontite + prehnite, at low-pressure end and epidote + chlorite + quartz + H2O = laumontite + pumpellyite |  | | Journal (article/letter/editorial) | | cation contents. Examples of this behavior include laumontite (CaAl2Si4O12d nH2O), longrange Si–Al ordered...discussed in text Mode I Mineral Composition Laumontite Wairakite Bikitaite Yugawaralite Natrolite Mesolite...water vapor pressure at room temperature (e.g., laumontite; Neuhoff and Bird, 2001; Fridriksson et 2.0...increasing grade in zeolite facies basalts in eastern Iceland (Neuhoff, unpublished data). Unfortunately...compositions of analcime in zeolite facies metabasalts in Iceland (Neuhoff, unpublished data) and the rightmost gray |  | | Book | | HEULANDITE 53 HYDRONEPHELITE 58 LAUBANITE 59 LAUMONTITE 60 LEONHARDITE 65 LEVYNITE= LEVYNE 67 MAZZITE...Hilaire Bluff, Bay of Fundy ATLANTIC 1 I I ICELAND Berufjord, Fasrudsfjord EUROPE BRmSH ISLES IRELAND...Collingwood, Richmond, Melbourne, Victoria ATLANTIC ICELAND Berufjord GREENLAND Faroe Island SOUTH AMERICA...and auartz in limestone stllbite, analcime, laumontite, and shists. gemelinite, thomsonite, prehnite...NOVA SCOTIA In the Bay of Fundy Region, Annapolis Royal. ATLANTIC ICELAND Berugjord GREENLAND Faroe |  | | 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...mineralization sequence developed with chlorite, laumontite I, quartz, and calcite I. Ongoing magmatic activity...temperatures, in the range of 270–180 ◦ C, babingtonite, laumontite II, prehnite, julgoldite, yugawaralite, calcite...contrast, the basalts in the Mumbai (formerly Bombay) region erupted in a lagoonal to shallow marine environment |  | | Journal (article/letter/editorial) | | aqueous liquid. Keywords Water–Rock Interaction Laumontite Prehnite Reaction Vein Albitisation Arvigo...conditions of Barrovian late Alpine metamorphism for the region around Arvigo yield a temperature range from 600–680°C...chlorite II, calcite and zeolites. Scolecite and laumontite are by far the dominant zeolite species, whereas...the rock matrix. Calcite, epidote, prehnite and laumontite occur as accessory minerals only in TS 12.1....following albitisation of gneiss plagioclase. Laumontite is visible due to the perfect cleavage 123 |  | | Book | | Analcime, Wairakite, Viseite, Hsianghualite .. Laumontite, Leonhardite .................. Yugawaralite...Harmotome: Haiiy (1801) Natrolite: Klaproth (1803) Laumontite: Werner (in Karsten 1808) Scolecite: Gehlen and...related to each other, namely those of analcime, laumontite, yugawaralite and roggianite. A description of...orthogonal cages (Fig. 0.2 G b). The framework of laumontite may be built by assembling a 12-nodes unit (Fig...Ia3d Analcime Ia3d or I4l/acd or Ibca C2Im Laumontite C2Im C2Im Yugawaralite Pc I4/mcm Roggianite |  | | 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...Skagafjördur, a Tertiary tholeiitic flood basalt region in northern Iceland range between 0.10 and 28 ppb. Surface...relative mobilities of these elements elsewhere in Iceland and in other basaltic regions. Peat soil waters |  | Rogers, Karyn L., Neuhoff, Philip S., Pedersen, Asger K., Bird, Dennis K. (2006) CO2 metasomatism in a basalt-hosted petroleum reservoir, Nuussuaq, West Greenland. Lithos, 92 (1) 55-82 doi:10.1016/j.lithos.2006.04.002 | Journal (article/letter/editorial) | | hydrothermal and deformation events affecting this region. Regional metamorphism resulted in extensive occlusion...exposures of a basaltic petroleum reservoir. This region is ideal for characterizing the evolution of these...Paleogene rocks from the Labrador Sea to Baffin Bay region. The Nuussuaq Basin belongs to a complex of sedimentary...Generalized geologic map of the Nuussuaq-Disko region in West Greenland. The crosshatched areas indicate...basalts. extensional fault system establishes the eastern boundary (Chalmers et al., 1999). In the early |  | 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) | | 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...and Selbekk [11] estimated for Hvalfjördur area, Iceland, a paleo geothermal gradient of 133 ± 10 ◦ C/km |  | | Journal (article/letter/editorial) | | temperatures wairakite reacts with HeO to form laumontite. Reconnaissance experiments dealing with the...of calcium zeolites suggest that wairakite or laumontite may be replaced by the assemblage calcite + montmorillonite...(1969), and Coombs et al. (1970) showed that laumontite- and heulandite-bearing assemblages of zeolite...Qz Cc F Mix () Wairakite, CaAI~SiaO~-2HI~O Laumontite, CaAI~Si401~-4H~O Epistilbite, CaAI2Si6016.5H~O...synthesized from the oxide mixture and from natural laumontite. I t formed, commonly with some other metastable |  | | Journal (article/letter/editorial) | | Earth Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland a r t i c l e i n f o Article...however different and include quartz, smectites, laumontite and calcite, with the appearance of wairakite...quartz observed at b150 °C in the Disko–Nuussuaq region in W Greenland (Rogers et al., 2006), and the formation...basaltic rocks, such as being planned at Hellisheidi, Iceland (Matter et al., 2009, 2011; Gíslason et al., 2010;...spring water from Vellankatla, both collected in SW Iceland (Table 1). The basaltic glass was dry sieved to |  | | Book | | for naming stilbite, analcime, harmotome, and laumontite although he only popularized and more completely...faujasite, ferrierite, gmelinite, goosecreekite, laumontite, levyne, mazzite, merlinoite, montesommaite,...pressure collapses. At high pressure heulandite or laumontite is replaced by lawsonite, and analcime by albite...scattered sites. Rarely, erionite, mordenite, and laumontite are found. Merlinoite is found with plagioclase...flows in Hawaii and Washington (in the U.SA) and Iceland, show that basalt flowed into lakes or rivers and | | | Book | | for naming stilbite, analcime, harmotome, and laumontite although he only popularized and more completely...faujasite, ferrierite, gmelinite, goosecreekite, laumontite, levyne, mazzite, merlinoite, montesommaite,...pressure collapses. At high pressure heulandite or laumontite is replaced by lawsonite, and analcime by albite...scattered sites. Rarely, erionite, mordenite, and laumontite are found. Merlinoite is found with plagioclase...flows in Hawaii and Washington (in the U.SA) and Iceland, show that basalt flowed into lakes or rivers and |  | Stefánsson, Andri, Arnórsson, Stefán, Sveinbjörnsdóttir, Árný E., Heinemaier, Jan, Kristmannsdóttir, Hrefna (2019) Isotope (δD, δ18O, 3H, δ13C, 14C) and chemical (B, Cl) Constrains on water origin, mixing, water-rock interaction and age of low-temperature geothermal water. Applied Geochemistry, 108. 104380 doi:10.1016/j.apgeochem.2019.104380 | Journal (article/letter/editorial) | | Earth Sciences, University of Iceland, Sturlugata 7, 101 Reykjavík, Iceland Aarhus AMS Centre, Department...Consulting Engineers, Lynghás 4, 110 Reykjavík, Iceland A R T I C LE I N FO A B S T R A C T Editorial...low-temperature geothermal water from northern Iceland were investigated in order to delineate the origin...cold and low-temperature geothermal waters in the region display a complex story, with waters originating...of waters for a given low-temperature region in northern Iceland. The dataset is extensive and includes |  | | Journal (article/letter/editorial) | | zeolites such as clinoptilolite, heulandites, and laumontite (Andrews 1980; Alt and Honnorez 1984; Cummings...Infrared band assignments in the OH-stretching region, following assignments made in Besson and Drits...sandstones of the Rewan Group, southern Bowen Basin, eastern Australia, Clay Minerals, 32, 4, 499–506. Benson...their infrared spectra within the OH stretching region; Part I, Identification of the OH stretching bands...equilibria in basalt aquifers: The Columbia Plateau, eastern Washington, U.S.A. Chemical Geology, 36, 15–34 |  | Neuhoff, Philip S., Kroeker, Scott, Du, Lin-Shu, Fridriksson, Thráinn, Stebbins, Jonathan F. (2002) Order/disorder in natrolite group zeolites: A29Si and27Al MAS NMR study. American Mineralogist, 87 (10) 1307-1320 doi:10.2138/am-2002-1006 | Journal (article/letter/editorial) | | Berufjördur, Iceland 2.99 2.02 0.67 0.64 0.00 10 1.48 1.54 SCO001 scolecite Teigarhorn, Iceland 3.00 2.00...additional peaks may not have been identified in the region of the spectrum containing signals from the chabazite...DISORDER IN NATROLITE GROUP ZEOLITES the W1 site in laumontite (Neuhoff and Bird 2001), suggesting that the...energetically similar to the W1 water in laumontite. The W1 site in laumontite is empty under the in situ conditions...conditions in which laumontite precipitates, but it becomes hydrated once the mineral equilibrates at high |
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