 | Escobedo, David, Patrier, Patricia, Beaufort, Daniel, Gibert, Benoit, Levy, Léa, Findling, Nathaniel, Mortensen, Annette (2021) Contribution of the Paragenetic Sequence of Clay Minerals to Re-Examination of the Alteration Zoning in the Krafla Geothermal System. Minerals, 11 (9) 935 doi:10.3390/min11090935 | Journal (article/letter/editorial) | | Re-Examination of the Alteration Zoning in the Krafla Geothermal System David Escobedo 1,2 , Patricia...Re-Examination of the Alteration Zoning in the Krafla Geothermal System. Minerals 2021, 11, 935. https://doi...beaufort@univ-poitiers.fr ÍSOR—Iceland GeoSurvey, Grensásvegur 9, 108 Reykjavík, Iceland; lea.levy@geo.au.dk Institute...Landsvirkjun Power, Háaleitisbraut 68, 103 Reykjavik, Iceland; Anette.Mortensen@landsvirkjun.is Correspondence:...mineralogy of the “smectite” alteration zone in the Krafla geo-thermal field via the study of an exploratory |  | | Journal (article/letter/editorial) | | water-basalt interactions. II: A field study in N.E. Iceland SJGURDURR. GISLASON*and HANsP. ELJGSTER Department...BARNESet al. ( 1978) and NESBI~ and actions. N.E. Iceland provides a unique opportunity BRKKER (1978). In...of Iceland, on the N.E. Iceland groundwater system, the system Dunhagi 3, 107 Reykjavik, Iceland. responsible...responsible for recharge of the Krafla geothermal field. 2841 5 K. Glslason 2842 GEOLOGY The neovolcanic...1974; AND CLIMATE OF THE N.E. ICELAND RIFT ZONE or rift zane of N.E. Iceland BJORNSSON ef al., 1977, |  | | Journal (article/letter/editorial) | | eastern northward spreading segment and a western northeastern spreading segment. By comparison to other ridge...magmatic plumbing system is characteristic of Iceland today (e.g. Sigurdsson and Sparks 1978; Einarsson...secondary minerals. T r e m - Tremolite, A c t - Actinolite, P r - Prehnite, C h l Chlorite, H b l - Hornblende...partially hydrated and altered to hornblende and actinolite. At a later time after the intrusion had cooled...low N a 2 0 contents of basaltic magmas in this region (Melson and O'Hearn 1979). Given a mantle of homogeneous |  | | Book (volume) | | NORTH ATLANTIC REGION The Geology of North America The Western North Atlantic Region . Frontispiece...North America Volume M The Western North Atlantic Region Edited by Peter R. Vogt Naval Research Laboratory...be photocopied purpose of scientific Atlantic region. and included for the noncommercial or educational...Atlantic Kristjan 6. and tectonics Macdonald in Iceland, and application submarine mid-ocean ridges Gudmundur...delimiting the geographic scope of a synthesis volume. Iceland has often been used as a boundary, but from the |  | | Report (issue) | | Richard A. Houghton (Eds.) 154 The Rocky Mountain Region—An Evolving Lithosphere: Tectonics, Geochemistry...(Eds.) 172 Volcanism and Subduction: The Kamchatka Region John Eichelberger, Evgenii Gordeev, Minoru Kasahara... and Roderick Heelis (Eds.) 182 The Stromboli Volcano: An Integrated Study of the 2002–2003 Eruption..........................67 Implications of the Iceland Deep Drilling Project for Improving Understanding...on faster spreading ridges. Taking advantage of Iceland as the part of the Mid-Atlantic Ridge most accessible |  | | Book | | mineral can have more than one habit. For example, actinolite can be bladed, acicular, fibrous, or massive...which is softer. THIS OBSIDIAN outcrop is in Iceland, an island where acid igneous rocks are rare. ...Trachyte outcrops of trachyte are seen in this volcano on the island of Tenerife. DOME-SHAPED feldspar...margins. and pyroclastic dacite forms much of the volcano at Crater Lake, Oregon, USA. EXTRUSIVE hornblende...country rocks, which surround and lie beneath the volcano. Rounding of the clasts may have occurred in the |  | | Book (edition) | | hidden by a nebular disc of material (diagonal dark region) similar in mass and size to the one that formed...lower side by the 660 km seismic discontinuity. The region between this depth and another prominent discontinuity...capable of moving, albeit very slowly. In this region, heat can be transferred by moving hot low-density...triple junction may be present beneath the Afar region of Ethiopia, with the Red Sea and Gulf of Aden...calcite, also CaCO3 – after a locality in the Aragon region of Spain); after some major chemical constituent |  | | Book (edition) | | hidden by a nebular disc of material (diagonal dark region) similar in mass and size to the one that formed...lower side by the 660 km seismic discontinuity. The region between this depth and another prominent discontinuity...capable of moving, albeit very slowly. In this region, heat can be transferred by moving hot low-density...triple junction may be present beneath the Afar region of Ethiopia, with the Red Sea and Gulf of Aden...calcite, also CaCO3 – after a locality in the Aragon region of Spain); after some major chemical constituent |  | | Book | | environments from ophiolites, contemporary oceanic crust, Iceland, continental rifts, and continental margins. Professor...open your eyes to the largest and most unexplored region on Earth – the global Mid-Ocean Ridge. My own introduction...ridges: fire and ice 4.2.1 Grimsey Field, north of Iceland 4.2.2 Trollveggen (Troll Wall) Field, Mohns Ridge...colonization 4.11.5 Wiring an active submarine volcano 4.12 Guaymas Basin: venting at sedimented ridges...historically difficult to image. In places such as Iceland, however, where volcanism has been ongoing for |  | | Book | | are usually thought to be emplaced from a focal region above a mantle plume (e.g., Halls 1982; Ernst and...Chadwick et al. 2011) and the active Niuafo’ou volcano in a back-arc basin setting behind the Tonga Arc...Vanderkluysen et al. 2011). Dyke orientations in the region between these subswarms are more complicated and...that trend NW across the Saurashtra (Kathiawar) region (Auden 1949). A sparse set of dykes has been mapped...Viegas 1995; Ray et al. 2007). In the Saurashtra region the dykes that intersect the radiating subswarm |  | | Report (issue) | | rocks Precambrian rocks Tectonics Basin and Range region _______ _______________ Stratigraphic and structural...Igneous rocks Geochronologic studies Pacific coast region Oregon Western United States Washington California...Geologic maps Water-resource investigations Northeastern region Connecticut Delaware Illinois Indiana Maryland...Water-resource investigations Continued Northeastern region Continued Virginia ________________________...___ Wisconsin ________________ Southeastern region ___________ Alabama _______________________ Florida |  | | Report (volume) | | rocks Precambrian rocks Tectonics Basin and Range region _______ _______________ Stratigraphic and structural...Igneous rocks Geochronologic studies Pacific coast region Oregon Western United States Washington California...Geologic maps Water-resource investigations Northeastern region Connecticut Delaware Illinois Indiana Maryland...Water-resource investigations Continued Northeastern region Continued Virginia ________________________...___ Wisconsin ________________ Southeastern region ___________ Alabama _______________________ Florida |  | | Book (edition) | | historic eruptions 251 and natural gas 130 13.11 Volcano prediction 257 9.10 Exploration for oil and...ask: What are the lavas made of? How does the volcano work and how is the heat generated? Where do the...the lavas and gases come from? When did the volcano first begin to erupt and when is it likely to erupt...It is quite useless, for example, to ask why a volcano erupts, or why the sky is blue, or why there are...propitiated by suitable sacrifices. In the Mediterranean region, for example, many of the Olympian gods made familiar |  | | Book (volume) | | is less, the viscous-dominated Stokes’ settling region also persists up to 100 mm. However, the fast falling...environment of the estuarine turbidity maximum above the region within a metre of the bed. Closer to the bed, high...sublayer, there is a transition (‘buffer layer’) to a region in which the flow speed varies as the logarithm...it is not suspended. This means that there is a region of bedload transport for all particles of settling...Suspension Once material is moved out of the near-bed region, it is held in suspension by the action of fluid |
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