 | Wysoczanski, R.J., Gamble, J.A., Kyle, P.R., Thirlwall, M.F. (1995) The petrology of lower crustal xenoliths from the Executive Committee Range, Marie Byrd Land Volcanic Province, West Antarctica. Lithos, 36 (3) 185-201 doi:10.1016/0024-4937(95)00017-8 | Journal (article/letter/editorial) | | xenoliths from the Executive Committee Range, Marie Byrd Land Volcanic Province, West Antarctica R.J. Wysoczanski...magmas from the late-Cenozoic Marie Byrd Land Volcanic Province, West Antarctica, have entrained lithospheric...collected from the Executive Committee Range (Mounts Hampton in the north and Mount Sidley in the south) in...in central Marie Byrd Land, and their petrological characteristics together with preliminary geochemicai...xenoliths from Mounts Hampton and Sidley differ (e.g. Mount Sidley xenoliths have Mg# 32-80, are relatively |  | | Journal (article/letter/editorial) | | PhonoliteâTrachyte Succession at Mount Sidley, Marie Byrd Land, Antarctica KURT S. PANTER1â, PHILIP R. KYLE1...the Late Pliocene (5·7 to 4·2 Ma) Mt Sidley volcano, Marie Byrd Land, is examined using major and trace...caldera exposes lavas and tephras, deep within Mt Sidley, and allows its magmatic evolution to be elucidated...compositions in both series fall within a narrow range of 87Sr/86Sri (0·7028â 0·7032), 143Nd/144Ndi (0·51285â0·51290)...phonolitic series is modeled by fractionation of diopside, olivine, plagioclase, titaniferous magnetite |  | LeMasurier, Wesley E., Futa, Kiyoto, Hole, Malcolm, Kawachi, Yosuke (2003) Polybaric Evolution of Phonolite, Trachyte, and Rhyolite Volcanoes in Eastern Marie Byrd Land, Antarctica: Controls on Peralkalinity and Silica Saturation. International Geology Review, 45 (12) 1055-1099 doi:10.2747/0020-6814.45.12.1055 | Journal (article/letter/editorial) | | Trachyte, and Rhyolite Volcanoes in Eastern Marie Byrd Land, Antarctica: Controls on Peralkalinity and Silica...Trachyte, and Rhyolite Volcanoes in Eastern Marie Byrd Land, Antarctica: Controls on Peralkalinity and Silica...Trachyte, and Rhyolite Volcanoes in Eastern Marie Byrd Land, Antarctica: Controls on Peralkalinity and Silica...Otago, Dunedin, New Zealand2 Abstract In the Marie Byrd Land volcanic province, peralkaline and metaluminous...contamination. We focus on volcanoes of the Executive Committee Range and Mount Murphy, where we find good representation |  | | Journal (article/letter/editorial) | | Cenozoic, alkalic volcanic lineages at Mount Morning, West Antarctica and their entrained lithospheric mantle...identiïŹed at Mount Morning, a Cenozoic to recent, eruptive centre in the Ross Sea, West Antarctica, which is...trace element and isotope variation (SrâNdâPb) in Mount Morning basaltic rocks and entrained xenoliths suggests...volcanic rocks in Antarctica (Victoria Land â including Mount Morning â and Marie Byrd Land), Zealandia and...measured in some SCLM xenoliths and volcanic rocks at Mount Morning, and in volcanic rocks across the DAMP, |  | LeMasurier, Wesley E., Choi, Sung Hi, Kawachi, Y., Mukasa, Samuel B., Rogers, N. W. (2011) Evolution of pantellerite-trachyte-phonolite volcanoes by fractional crystallization of basanite magma in a continental rift setting, Marie Byrd Land, Antarctica. Contributions to Mineralogy and Petrology, 162 (6) 1175-1199 doi:10.1007/s00410-011-0646-z | Journal (article/letter/editorial) | | magma in a continental rift setting, Marie Byrd Land, Antarctica Wesley E. LeMasurier âą Sung Hi Choi âą...2011 Ă Springer-Verlag 2011 Abstract The Marie Byrd Land province includes 18 large (up to 1,800 km3)...isotopic equilibrium throughout the basalt-felsic range, and the results of modeling, all exclude significant...rocks by fractional crystallization. Keywords Marie Byrd Land dome Polybaric fractionation Pantellerite...which is available to authorized users. The Marie Byrd Land (MBL) province lies within the West Antarctic |  | Sharygin, V.V., KĂłthay, K., SzabĂł, Cs., Timina, T.Ju., Török, K., Vapnik, Ye., Kuzmin, D.V. (2011) Rhönite in alkali basalts: silicate melt inclusions in olivine phenocrysts. Russian Geology and Geophysics, 52 (11) 1334-1352 doi:10.1016/j.rgg.2011.10.006 | Journal (article/letter/editorial) | | kbar. Rhönite crystallized in a narrow temperature range (1180â1260 °C) and P < 0.5 kbar. The petrography...Olsson, 1983 Iceland plume Prestvik et al., 1999 Western Romania Downes et al., 1995; Seghedi et al., 1995...TĂłth, 2003 Poland Ladenberger et al., 2006 Antarctica Kyle and Price, 1975; Wysoczanski, 1993 Cape...1964 Eifel, Germany Shaw and KlĂŒgel, 2002 Antarctica Gamble and Kyle; 1987; Grapes et al., 2003 ...(BBHVF) is situated in the central Pannonian basin (Western Hungary), whereas the NĂłgrĂĄd-Gömör Volcanic Field |  | | Journal (article/letter/editorial) | | carbonatic pyroxenite xenolith type, is composed of diopside, subordinate fluorapatite, interstitial Fe-Mg...dacitetrachydacite glass in primary silicate melt inclusions in diopside, together with calcio-carbonatite and CO2-N2-CO...K-feldspar (Kfs), amphibole (Amp), newly formed diopside (Px) and residual silicic glass. 67 V. HURAI...inclusions correspond to diopside (Table 1). Mica inclusions in the diopside and the daughter phases in...6ÂșC (natural CO2 Angular carbonate fragments in diopside are Ca-Mg siderites containing up to 13 wt.% of |  | | Book | | 6-15 August 1970, organized by the SCIENTIFIC COMMITTEE ON ANTARCTIC RESEARCH and sponsored by the INTERNATIONAL...earth scientists in the scientific exploration of Antarctica can best be judged from the fact that 7 years...Cape Town, Antarctic earth scientists were able to mount a larger but similarly effective symposium at Oslo...geology and solid earth geophysical literature of Antarctica. It is worth noting that two important differences...result of much work by the Norwegian National Committee under the Chairman, Dr T. Gjelsvik, and the grateful |  | Shchipalkina, Nadezhda V., Pekov, Igor V., Chukanov, Nikita V., Koshlyakova, Natalya N., Ternes, Bernd, SchĂŒller, Willi (2019) Crystal chemistry of dorrite from the Eifel volcanic region, Germany, and chemical variations in the khesinite-dorrite-rhönite-kuratite solid-solution system. Mineralogy and Petrology, 113 (2) 249-259 doi:10.1007/s00710-018-0645-0 | Journal (article/letter/editorial) | | tetrahedrally coordinated positions). Different wide-range substitutions in the positions M1â7 and T are typical...core and ingrowths of hematite (Hem) embedded in diopside (Di) aggregate. FOV width is 0.2 mm member formulae...for quantitative analysis: wollastonite (Ca), diopside (Mg), Mn (Mn), Zn (Zn), hedenbergite (Fe), hornblende...The associated minerals are cuspidine, spinel, diopside, gehlenite, calcite, Table 2 Chemical composition...(000) Xcalibur S CCD MoKα; 0.71073 6.233 850 Data range Ξ (°) Unique reflections /unique reflections with |  | Brenna, Marco, Pontesilli, Alessio, Mollo, Silvio, Masotta, Matteo, Cronin, Shane J., Smith, Ian E.M., Moufti, Mohammed Rashad Hassan, Scarlato, Piergiorgio (2019) Intra-eruptive trachyte-phonolite transition: Natural evidence and experimental constraints on the role of crystal mushes. American Mineralogist, 104 (12) 1750-1764 doi:10.2138/am-2019-6963 | Journal (article/letter/editorial) | | Clinopyroxene crystallizes with compositions diopside-augite and augite-hedenbergite, respectively,...(<200 MPa) reservoirs. In the Marie Byrd Land volcanic province (Antarctica), LeMasurier et al. 1750 Downloaded...of the Al Shaatha eruption along a wadi on the western side of the volcano. The crater rim (dashed) is...1755 Figure 4 Wo a) Wo 50 50 Hedenbergite Diopside 45 45 Augite 40 40 En Fs 6 1.5 TiO2 (wt%)...is its distal equivalent. The eruptive products range from poorly vesicular (<25%) and crystalline (diktytaxitic |  | | Journal (article/letter/editorial) | | Elsevier B.V. All rights reserved. 1. Introduction Mount Suswa is a large (>700 km 2) trachytic shield volcano...west Africa (Fitton, 1987); the Marie Byrd Land province, west Antarctica rift system (LeMasurier et al...Synâcaldera Phreatomagmatic Group Ring Feeder Group Western Pumice Group Enkorika Fissure Group Early Postâcaldera...(RFG, S3), including trachytic lava ïŹows; (c) the Western Pumice Group (WPG, S4) consisting of pumice-lapilli...(Omenda, 1997). Fig. 2. SimpliïŹed geologic map of Mount Suswa following Skilling (1988, 1993). J.C. White |  | Eskandari, Amir, Deevsalar, Reza, De Rosa, Rosanna, Shinjo, Ryuichi, Donato, Paola, Neill, Iain (2020) Geochemical and isotopic constraints on the evolution of magma plumbing system at Damavand Volcano, N Iran. Lithos, 354. 105274 doi:10.1016/j.lithos.2019.105274 | Journal (article/letter/editorial) | | (stage-4). The results affirm the advantages of using a range of compositional and textural records in modeling...The results affirm the 43 advantages of using a range of compositional and textural records in modeling...crustal thickness beneath the central part of Alborz range has been estimated from 46-58 km, 92 comprising...deposits are well preserved on the southern and western flanks of the volcano and consist of thick lava...of olivine (Fo78-88) and clinopyroxene (high Mg diopside, Mg# 80-89) set in with a groundmass 124 containing |  | | Journal (article/letter/editorial) | | alkali lamprophyre dyke swarm was emplaced in western South Island, New Zealand, during transtensional...aegirineâriebeckite schists. Carbonatites show a wide range of compositions from calcite- through dolomiteâankerite-...synthetic standards were prepared to extend the range of calibration for Ca, Mg and Fe. Fused discs of...matrix-calibration curves and to extend the analytical range. Proportions of the stable isotopes were measured...in many samples of ferrocarbonatite and shows a range of compositions from Ca0.011Mg0.188Fe1.698 Sr0.000Mn0 |  | | Journal (article/letter/editorial) | | latter can be followed for 50â60 cm along the western contact, which is the least deformed part of the...5O18] âZircon Pointâ, Khmara Bay, Enderby Land, Antarctica Metamorphosed granite pegmatitic leucosomes...hematite (FeKα), spessartine (MnKα), diopside (MgKα), diopside (CaKα), jadeite (NaKα), orthoclase (KKα)...reĂnement. Estimated standard deviations (e.s.d.) range from 0.8â1.0% of the reĂned Be occupancies in makarochkinite...at a spectral resolution of 5 nm in the UV/VIS range and 10 nm in the NIR region. The measure spot was |  | | Journal (article/letter/editorial) | | kaersutite-bearing spinel-wehrlite xenoliths in Foster Crater, Antarctica (Gamble and Kyle, 1987); (5) tephrite and nepheline...Kp = kaliophilite, Ns = Na metasilicate, Di = diopside, Ol = olivine, Cs = Ca orthosilicate, Ilm = ilmenite...but the contents of Ă„kermanite vary in a broad range (Fig. 4). Ă
kermanite and gehlenite in melilites...<0.6 wt.% K2O. Most clinopyroxenes are Al-rich diopsideâ hedenbergites (Fig. 5). Al-clinopyroxene microphenocrysts...a stronger peak at 525 cmâ1 in the 500â600 cmâ1 range, which is shifted to lower frequencies, but a smaller |  | | Journal (article/letter/editorial) | | 01 m/s, corresponding to an ascent time in the range of 5â29 days for a depth of entrapment of 25 km...coeval (Aeolian archipelago) or older (e.g. the sea-mount Anchise, a few km west of Ustica, whose age is 3...thinned oceanic crust (about 8 km thick) and a westernâsouthern domain characterized by a variably thick...orientation and particularly well exposed in the western side of the island. 153 Fig. 3. Microscope photo...island suggests five periods of activity in the range 735 to 130 ka (De Vita et al., 1998). From the volcanological |  | | Journal (article/letter/editorial) | | Quaternary Kula Volcanic Province is located in western Anatolia, Turkey. This Na-alkaline anorogenic volcanism...to lower pressures. The Kula Volcanic Region in western Anatolia, Turkey represents one of the best preserved...contrast to older surrounding volcanic regions in western Anatolia (Fig. 1) that are dominated by K-enriched... Geological setting The geological history of western Anatolia is dominated by collisional tectonics...1996). This post-Oligocene NEâSW extension within western Anatolia initiated the formation of prominent NWâSE |  | | Journal (article/letter/editorial) | | standards: quartz (Si), corundum (Al), albite (Na), diopside (Ca), olivine (Mg), fayalite (Fe), spessartine... RI Chromite is Cr-rich, exhibiting a limited range of variation of Cr3+/(Cr3++Al3+)(Cr#) 0.82 â 0.88...sample (Table 3; Fig. 10). TiO2 contents of chromite range up to 0.52 wt.% in the NU Agrilia samples but...devitrified glass at Agrilia has VIIINa+IVSi in the range 3.87-4.21 per 20 oxygen formula unit (Table 4)....from MA Pournari have a limited compositional range, with SiO2 from 53.5-54.6 wt.%, TiO2 0.21-0.26 wt |  | Matusiak-MaĆek, Magdalena, Puziewicz, Jacek, Ntaflos, Theodoros, GrĂ©goire, Michel, KukuĆa, Anna, Wojtulek, Piotr Marian (2017) Origin and evolution of rare amphibole-bearing mantle peridotites from Wilcza GĂłra (SW Poland), Central Europe. Lithos, 286. 302-323 doi:10.1016/j.lithos.2017.06.017 | Journal (article/letter/editorial) | | temperatures recorded 28 in all groups vary within the range 905-970°C. PT ED 14 AC CE Hornblende-clinopyroxenite...SETTINGS 74 Widespread Cenozoic volcanism in Western and Central Europe (Wilson and Downes, 75 2006)...easternmost Eger (OhĆe) Rift 78 is located in western Bohemian Massif (Fig. 1). Volcanic rocks occur...studied xenoliths are 230 oval to elongated and range from 100 ÎŒm to >2 cm in diameter. Contacts between...slightly negative. T 278 Clinopyroxene I is Cr-diopside with Mg# ranging from 0.91 to 0.93 (Supplementary |  | | Journal (article/letter/editorial) | | 85-107 Mediterranean region, heat flow 33(1-3) 3-30 Western Australia, geochemistry 37(2-3) 199-221 Acebuches...33( l-3) 169-188 Brooks Range 35( l-2) l-25 structural geology, Brooks Range 33( l-3) 67-83 Albacete...121-138; l3(2) 217-219; l7(4) 289298; 36(2) 103-l 14 Antarctica 29( l-2) 87- 105 Califomia27(2) 107.114 France...Volumes 1-39 Cima dâ Asta 32( l-2) 47-62 Koralpe Range 25( l-3) 219-226 magmas, Dolomites 10(l) 39-47 metamorphism...1-2) 43-56 mineralogy 3(2) 161-166; 7(2) 75-79 Western Australia, geochemistry 37(2-3) 181-197 amber mica |  | | Journal (article/letter/editorial) | | then six deep ice cores have been drilled in Antarctica and four more in Greenland. Development of techniques...actinides requires considerable knowledge of a wide range of geochemical processes: dissolution, complexation...genetic exchange between microorganisms with a range of relatedness and to begin to build an ecosystem...the reason why it is still far from perfect. In western Canada, the presence of high concentrations of...be demonstrated in the southern portion of the Western Canada Sedimentary Basin where several families |  | | Report (issue) | | ICOG-8. Finally, it was the wish of the Organizing Committee to provide the delegates with a referenceable...Electric Company Western Mining Corporation (USA) VMI, Inc. iv ICOG-8 Organizing Committee Gamiss H. Curtis...derived from Tertiary volcanic centers in the western U.S. These results support geomorphic, geochemical...surface water from the impoundments. The data span a range of 12 o/oo in 8 180H20 and 55 o/oo in 8D. Seeps...+2.6 %o and +4.1 to +4.8 %o. Values of 8180so4 range from -1.4 to +2.5 %o. Possible explanations for |
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