 | Duffield, W.A., Bullen, T.D., Clynne, M.A., Fournier, R.O., Janik, C.J., Lanphere, M.A., Lowenstern, Jacob, Smith, James G., Giorgis, L.W., Kahsai, Gabreab, Mariam, K.W., Tesfai, Theoderos (1997) Geothermal potential of the Alid Volcanic Center, Danakil Depression, Eritrea. Open-File Report Vol. 1997 (97-291) US Geological Survey doi:10.3133/ofr97291 | Report (issue) | | GEOTHERMAL POTENTIAL OF THE ALID VOLCANIC CENTER, DANAKIL DEPRESSION, ERITREA By: Wendell A. Duffield1 Thomas...Ministry of Energy, Mines and Water Resources, Eritrea Open-File Report 97-291 This report is preliminary...the terms of PAS A Number AOT-0002-P-00-5033-00. Alid structural dome as seen from the field camp. View...10, 1996, in the west part of the summit area of Alid. View is to the westnorthwest. Mountains in the...west of Alid graben. Back row, left to right: Glenn Anders, head ofUSAID mission in Eritrea; Leake W/Giorgis |  | | Report (issue) | | world ALID VOLCANO IN THE COLONY OF ERITREA (Translation of Angelo Marini's "IL VULCANO ALID NELLA COLONIA...COLONIA ERITREA")' Edited and Translated by Jacob B. Lowenstern 1 and Francesco Villa^ *originally published...1998 Alid Volcano in the Colony of Eritrea (Translation of Angelo Marini's "H Vulcano Alid nella Colonia...Colonia Eritrea") UNITED STATES DEPARTMENT OF THE INTERIOR BRUCE BABBITT, Secretary U.S. GEOLOGICAL............................... 2 Alid Volcano in the Colony of Eritrea (L'Universo: Jan. 1938, v. 19, p |  | | Book | | three major structures of the Earth’s crust: the Red Sea, the Gulf of Aden and the East African Rift. Nearly...discovery—along the axis of the depression—of some active volcanic ranges displaying magmatic and tectonic features...be attempted. Extensive radiometric dating of volcanic rocks, coupled with tectonic, petrological and...internal Afar was almost entirely floored by recent volcanic rocks (less than four million years old) and that...margin showed that the connection between the Red Sea and the Gulf of Aden spreading axes had to be found |  | | Journal (article/letter/editorial) | | carbon dioxide is the second most common gas in volcanic exhalations (White and Waring 1963; Symonds et...corroborated by gas-rich groundwaters, CO2-rich volcanic gases, and the associ- Fig. 3 Solubility plot...dolomite broke down completely. Berg (1986) described calcite±brucite intergrowths, which may also represent...basalt compositions from the submarine North Arch volcanic ®eld, north of Oahu (Hawaii). They argue that...(with CO2/H2O by wt=2.5 in both). The mantle source region was inferred to be ¯uid absent, although the host |  | | Journal (article/letter/editorial) | | ANTHONY D. FOWLER, Ottawa-Carleton Geoscience Center, Department of Earth Sciences, University of Ottawa...xenocrysts. The well-known ore deposits of the Sudbury region are directly related to the genesis of the Sudbury...0361-0128/01/3299/1521-20 $6.00 occurs in the center of the Sudbury structure. It overlies brecciated...into three regions: the North Range (i.e., the northern portion of the Sudbury Igneous Complex), which...69, plane-polarized light. B. Dendritic quartz (center-right of picture) in quartz and alkali feldspar |  | | Journal (article/letter/editorial) | | several sequences of plutonic (subvolcanic) and volcanic rocks, which host iron deposits in the Qorveh... monzonite, diorite, and minor gabbros with a volcanic sequences comprised of rhyolitic rocks. The coeval... REE = 177–209 ppm and La/Yb = 4.2–9 ppm for volcanic La/Yb = 2.6–9 ppm for plutonic samples; samples)...rocks with acidic to intermediate intrusive and volcanic rocks, which are Phanerozoic in age (Alavi, 1994)...1): intrusive rocks, volcanic rocks, and metamorphic rocks. Intrusive and volcanic rocks have a range of |  | Upton, B. G. J., Macdonald, R., Odling, N., Rämö, O. T., Bagiński, B. (2013) Kûngnât, revisited. A review of five decades of research into an alkaline complex in South Greenland, with new trace-element and Nd isotopic data. Mineralogical Magazine, 77 (4) 523-550 doi:10.1180/minmag.2013.077.4.11 | Journal (article/letter/editorial) | | include alkali amphibole, biotite, quartz and calcite). In the well dissected earlier stock, a 2.2 km-thick...Niger–Nigerian ringcomplexes (Bowden et al., 1987) and Center 1, Coldwell Complex, Ontario (Mitchell and Platt...rose high into the early Gardar sedimentary and volcanic strata shows that they attained such shallow crustal...insight into the physical processes operating in sub-volcanic reservoirs, including mechanisms of crystal-melt...A REVIEW OF AN ALKALINE COMPLEX siderite and calcite. The peak of the Ca-Fe carbonate solvus is ~800ºC |  | Årebäck, H., Andersson, U. B., Petersson, J. (2008) Petrological evidence for crustal melting, unmixing, and undercooling in an alkali-calcic, high-level intrusion: the late Sveconorwegian Vinga intrusion, SW Sweden. Mineralogy and Petrology, 93 (1) 1-46 doi:10.1007/s00710-007-0217-1 | Journal (article/letter/editorial) | | postkinematic, late Sveconorwegian intrusions in the region. Rocks in the intrusion display complex, but well...Segment. ES: Eastern Segment. WG: Western Gneiss Region. TIB: Trans-Scandinavian Igneous Belt The late...1996; Andersen and Griffin, 2004) (Fig. 1). The region affected by the Sveconorwegian orogeny is a mosaic...1796 1784 1553 1682 Include zircon, epidot, calcite, allanite, sphene, pyrite, pyrrhotite 60 Grey...quartz þ K-feldspar calcite and chlorite calcite in their central parts. The northern side of Vinga Island |  | | Journal (article/letter/editorial) | | distributions of magma reservoir bubbles preceding volcanic eruptions. Studies considering bubbles in magmas...and bubble number density. Small ‘‘9’’ designates center of melt pool in 1-day and 2-week images. Note lower...walls, with small bubbles restricted to the capsule center, and separating these is a sheath of melt lacking...and that small bubbles are clustered in capsule center experimental series there is a visually apparent...coarsening in rhyolite with 4–6 wt% H2O (moderate); Red lines represent minimum and maximum coarsening in |  | Sainlot, N., Vlastélic, I., Moune, S., Rose-Koga, E.F., Schiavi, F., Valade, S., Aguilera, F. (2020) Uptake of gaseous thallium, tellurium, vanadium and molybdenum into anhydrous alum, Lascar volcano fumaroles, Chile. Geochimica et Cosmochimica Acta, 275. 64-82 doi:10.1016/j.gca.2020.02.009 | Journal (article/letter/editorial) | | secondary sulfate minerals during the reaction between volcanic gases and rocks modulates the composition and...ground. The other fraction is trapped within the volcanic edifices, due to the dissolution of magmatic gases...and rocks significantly influence the chemistry of volcanic emanations (Henley and Berger, 2013; Henley and...which commonly form when acid gases interact with volcanic rocks rich in aluminium and alkalis (Getahun et...of the sulfate. This effect potentially depletes volcanic emanations in these elements and contributes to |  | | Report (issue) | | plutonic environment, as well as inclusions from the volcanic or extrusive environment that have undergone slow...accepted technique to investigate melt evolution in volcanic systems (Clocchiatti 1975, Roedder 1979, Lowenstern...al. 2001, Anderson 2003, Schiano 2003). MI in volcanic rocks are commonly large (>50 µm), glassy and...minerals, and are generally easy to identify. MI in volcanic rocks generally provide consistent and reasonable...behavior of two crystallized MI in quartz from the Red Mountain, Arizona, USA, porphyry copper deposit during |
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