 | | Journal (article/letter/editorial) | | Harvard's Mineralogical Tour of Iceland Downloaded by [University of Florida] at 17:55 08 August 2017...late evening flight on Icelandair to Keflavik, Iceland. T H E HARVARD MINERALOGICAL MUSEUM AS S O C... in Iceland. A group of nineteen individuals from across the United States participated. Iceland presented...process of formation. Volcanoes are very common in Iceland, erupting on the average of one in every five years...000 years. Most types of volcanoes are known in Iceland, with fissure eruption being the most common; shield |  | | Journal (article/letter/editorial) | | com/locate/epsl Silicate versus carbonate weathering in Iceland: New insights from Ca isotopes Andrew D. Jacobson...Editor: J. Lynch-Stieglitz Keywords: Ca isotopes Iceland chemical weathering long-term carbon cycle isotope...riverine fluxes of Ca and carbonate alkalinity in Iceland with the aim of quantifying the role of basalt...clinopyroxene. However, hydrothermal calcite occurs throughout Iceland, and even trace levels are expected...low-temperature groundwater, basalt, hydrothermal calcite (including Iceland Spar), and stilbite and heulandite, which |  | | 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) | | prehnite, calcite, and apophyllite-group minerals. Scolecite is apparently not abundant in the eastern United...masses of white radiating crystals to 2 cm with calcite, heulandite, and quartz in gold-bearing veins of...Lane County, Oregon. The Canadian Atlantic coastal region is well known as a source of excellent zeolite...as sparsely distributed crystals to 4 cm with calcite and datolite at Charcas, San Luis Potosi, Mexico...have been collected from the volcanic rocks of Iceland and the Faroes for centuries (Betz 1981). Scolecite |  | | Journal (article/letter/editorial) | | Earth Sciences, University of Iceland, Sturlugata 7, 101 Reykjavik, Iceland ABSTR ACT The effects of CO2...(Ca)-Fe-Mg smectites, SiO2, Ca-Na zeolites and calcite become the dominant secondary minerals forming...the level of atmospheric CO2. A project in SW Iceland, including scientists from different fields, is...quartz/chalcedony, clays and zeolites as well as calcite to be the dominant secondary minerals (Neuhoff...2001); HN-1 well water (Reykjavik Energy database, Iceland). The thermodynamic properties for phyllosilicates |  | | Journal (article/letter/editorial) | | igneous r~s assocI~ted wI~h. other ze~lltes ~d calcite, Occasionally It IS fo~d In gneisses, granires...specimens of HEULANDlTE come from Iceland at Berufjord and Teigarhorn, in Iceland, where crystals may attain...zeolites, have been collected from basalts in the region between Veronopolis and Bento Goncalves, Rio Grande |  | | Journal (issue) | | email at roy.starkey@gmail.com 10 Zeolites (rom Iceland DavidHardman When I started collecting seriously...Svappavaara in North Sweden) and mesolite (from Iceland). However, the Greeks,Romansand Mayasknew about...optical-gradecalcite since the late 16 centlJr)'· rt,e calcite is birefringent and its property of light polarizationwas...be used to aid marine navigatior1_.;specimen of Iceland Spar from this locality was recovered from the...now little to see or collect. So treasure any Iceland Spar specimensyou may havefrom this locality! |  | | Journal (article/letter/editorial) | | mine; for those who enjoy underground plates of calcite, and anatase on quartz, to name a few). One of...meteorite Agpalilik, recovered from the Cape York region near Thule, Greenland, sits in the center on a...Greenland, Iceland, and the Faroe Islands. Specimens of scolecite, heulandite, mesolite, and calcite from these...last two localities are astounding. In fact, the Teigarhorn heulandite crystal is included among the world’s...Figure 11. Stilbite, 6 x 3 x 3 cm, Berufjord, Iceland; collection of the Geological Museum,Copenhagen; |  | | Report (issue) | | gabbroic magmas. Association: Zeolites, prehnite, calcite. Distribution: Many localities for good crystals...known; exceptional crystals from the Teigarhorn, Berufjord, Iceland. At Ben More, Isle of Mull, and Talisker |  | | Report (issue) | | conglomerates. Association: Zeolites, prehnite, calcite, quartz. Distribution: A common zeolite, with...¯ne crystals. In Iceland, at the Helgustadir mine, Reydarfjord, and the Teigarhorn, Berufjord. On several |  | | Journal (article/letter/editorial) | | frequently P S E U D O M E S O L I T E X L S with Calcite - Grant C o . , Oregon ( p h o t o by D o n G...M E S O L I T E crystals come from Berufjord, Iceland, where colorless trans parent specimens often...often reach a length of 2 " or more. At Teigarhorn, Iceland, M E S O L I T E has been collected in fine MESOLITE...Victoria, Australia. M E S O L I T E pseudomorphed by calcite has been reported from Georgia, U.S.S.R. (photo...these species to swap. Bibliography "BerufjorJ, Iceland." Rocks & Minerals. Vol. 20, No. 8, Aug. 1945: |  | | Report (issue) | | Association: Zeolites, datolite, pectolite, calcite, quartz. Distribution: Many localities worldwide...specimens with large crystals from the Teigarhorn, Berufjord, Iceland. On the Alpe di Siusi, Trentino-Alto |  | | Report (issue) | | Association: Zeolites, datolite, apophyllite, calcite. Distribution: Many localities, even for ¯ne specimens...specimens. Exceptional crystals from the Teigarhorn, Berufjord, Iceland. At Haldarsvik, on Streymoy, Faeroe |  | | Journal (article/letter/editorial) | | Italy); 4) Nignaia Tunguska, Siberia, USSR; 5) Teigarhorn, Iceland; 6) Yoshida Area, Kagoshima Pref., Japan;...connected by microcrystalline quartz, but sometimes by calcite and/or hematite (when hematite is present, the...hematite (not determinable) ; Samples I, J and N: calcite; Sample K : eristobalite (more than 10%); Samples...Lindstr6m, G.: Investigation of ptilolite from Teigarhorn, Iceland. Geol. l~Sren. Stockholm F6rh. 29, 106 (1907)...Cretaceous and Palaeogene marine deposits of the eastern slopes of the Urals. Compt. Rend. (Doklady) Acad |  | 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) | | carbonates (siderite, magnesite, dolomite and calcite) and quartz. Carbonates associated with petroleum...approximate range of 0 ± 5‰, and (2) late stage calcite veins that are lighter in 18O (δ18OvSMOW between...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 |  | | 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 |  | | Journal (article/letter/editorial) | | of CO2 at the CarbFix site at Hellisheidi, SW-Iceland Sandra Ó. Snæbjörnsdóttir, Sigurdur R. Gislason...of CO2 at the CarbFix site at Hellisheidi, SW-Iceland, Geochimica et Cosmochimica Acta (2017), doi: https://doi...Hellisheidi, SW-Iceland Sandra Ó. Snæbjörnsdóttir Institute of Earth Sciences University of Iceland Askja Sturlugata...Sturlugata 7 101 Reykjavík, Iceland tel. 354-525-5414 fax. 354-525-4499 sos22@hi.is Reaction path modelling...of CO2 at the CarbFix site at Hellisheidi, SW-Iceland 1 Sandra Ó. Snæbjörnsdóttir1, Sigurdur R. Gislason1 |  | 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) | | that forms the Vista Alegre district in the border region of Rio Grande do Sul and Santa Catarina states...zeolites (heulandite and clinoptilonite), quartz, and calcite, typical of a low-T (100–150°C) hydrothermal alteration...number of native copper occurrences (n = 85) in the region. *Corresponding author. Email: leo.hartmann@ufrgs...carried out in ores and massive basalts in this region for comparison. Au, Pt, and Pd have a 0.5 ppb detection...covers an extensive area (∼1,200,000 km2) in south-eastern South America (Figure 1). The small Etendeka remnant |  | 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) | | Earth’s surface. In stage II, first an assemblage of calcite (I) and zeolite (I) (including mordenite, heulandite...overgrown by chalcedony, and finally a second calcite (II) and zeolite (II) generation developed by burial...III is characterized by precipitation of a third calcite (III) generation together with powellite and apophyllite...unusual twinned calcite crystals, and encrusted chalcedony, unusual twinned calcite crystals, and lately...basalt was undertaken for for the the basalts of Iceland [19]. Later on the basalts provinces. Most Mostbasic |  | | Journal (article/letter/editorial) | | in Tertiary basaltic lavas in the North Atlantic region indicate that individual zeolite minerals are distributed...zeolite deposits, such as those in the North Atlantic region, are among the most common occurrences of these...Data taken from Walker (1960b; Iceland basalts), this study (Iceland and East Greenland basalts), Schmidt...basalts), Kristmannsdottir and T6masson (1978; Iceland geothermal systems), Iijima (1988; Japan sediments)...observa tions of zeolite-zone parageneses in Iceland and Greenland, summarized below. Downloaded by |  | | 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...≥150 °C, mixed Ca–Mg–Fe smectites and chlorite, calcite, amorphous silica and zeolites formed instead of...initially and progressively being replaced by calcite and chlorite. The basaltic glass dissolution rate...limit the availability of Mg and Fe resulting in calcite being the only carbonate formed. This implies a...and include quartz, smectites, laumontite and calcite, with the appearance of wairakite and epidote and |  | | Journal (article/letter/editorial) | | phillipsite-Na and scolecite) and other secondary minerals (calcite, smectite-group minerals, goethite and Mn-oxides)... The Ca-rich and Narich zeolites and abundant calcite were produced by hydrothermal alteration. Mineral...they were followed by zeolite-group minerals and calcite. Analcime and phillipsite with or without chab...natrolite crystallized later from Na-rich fluids. Calcite and smectite-group minerals crystallized continually...from other localities in the Balaton Highland, Iceland and Northern Ireland. K EY WORDS : miarolitic |  | | Journal (article/letter/editorial) | | alteration minerals including quartz, chalcedony, opal, calcite, nontronite, saponite, and zeolites such as clinoptilolite...Infrared band assignments in the OH-stretching region, following assignments made in Besson and Drits...ongoing reaction with basalt and precipitation of calcite, clinoptilolite, opal, and Ca-Mg-rich clay minerals...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 |  | | Journal (article/letter/editorial) | | Bötzingen, Germany 2 ÌSOR Iceland GeoSurvey, Grensásvegur 9, 108 Reykjavik, Iceland 3 Institute for Technology...within the phonolite matrix. Phonolites in the eastern Kaiserstuhl were emplaced into a sedimentary sequence...different major geologic units (Fig. 1). (1) The eastern part consists of a sequence of Paleogene sediments...(“melanite”) and sodalite/haüyne. Phonolites from the eastern KVC (Fig. 1) form a distinct subgroup characterized...into the pre-volcanic Oligocene sediments of the eastern Kaiserstuhl (Fohberg, Endhalden); and (3) as intrusion |
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