 | | Journal (article/letter/editorial) | | Lavas and Associated Plutonic Inclusions of Ascension Island by CHRIS HARRIS1 Dept. of Geology and Mineralogy...in revisedform 5 May 1983) INTRODUCTION Ascension Island is a large composite volcano situated at approximately...the South Atlantic Ocean (Fig. 1). The Island is 98 km2 in area and represents the uppermost portion of...March 29, 2014 ABSTRACT The lavas and pyroclastics of Ascension Island contain a suite of plutonic inclusions...trachyandesite and trachyte to comendite. Basalt sensu stricto is relatively rare and there is a scarcity |  | | Journal (article/letter/editorial) | | silicate melt inclusions in Ascension Island granite xenoliths J. D. WEBSTER1,* and C. R. REBBERT2 1 Department...Department of Earth and Planetary Sciences, American Museum of Natural History, Central Park West at 79th...alkaline volcanic rocks of Ascension Island were analyzed for 29 major, minor, and trace elements. For most...are similar to those of the volcanic whole rocks and the xenoliths; we interpret the glasses to be chemically...alkaline; contain low S and P abundances; and are enriched in H2O, Cl, F, and Na relative to K. Inclusions |  | | Journal (article/letter/editorial) | | Crystallization and destabilization of eudialyte-group minerals in peralkaline granite and pegmatite: a...complex, Madagascar GUILLAUME ESTRADE *, STEFANO SALVI AND DIDIER BÉZIAT University of Toulouse, GET, CNRS,...Associate Editor: Katharina Pfaff ] ABSTR ACT Eudialyte-group minerals (EGM) are very common in highly...highly evolved SiO2-undersaturated syenites and are characteristic minerals of agpaitic rocks. Conversely...granites from the Cenozoic Ambohimirahavavy complex, and assess the magmatic conditions required to crystallize |  | Schilling, J., Wu, F.-Y., McCammon, C., Wenzel, T., Marks, M. A. W., Pfaff, K., Jacob, D. E., Markl, G. (2011) The compositional variability of eudialyte-group minerals. Mineralogical Magazine, 75 (1) 87-115 doi:10.1180/minmag.2011.075.1.87 | Journal (article/letter/editorial) | | pp. 87–115 The compositional variability of eudialyte-group minerals J. SCHILLING1, F.-Y. WU2, C. MCCAMMON3... K. PFAFF1, D. E. JACOB4 G. MARKL1,* 1 2 3 4 AND Mathematisch-Naturwissenschaftliche Fakultät, Fachbereich...of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box...October 2010; Accepted 24 January 2011] ABSTR ACT Eudialyte-group minerals (EGM) represent the most important...combined EPMA, Mössbauer spectroscopy and LA-ICP-MS study and EGM which crystallized in various fractionation |  | Harris, C., Cressey, G., Bell, J. D., Atkins, F. B., Beswetherick, S. (1982) An occurrence of rare-earth-rich eudialyte from Ascension Island, South Atlantic. Mineralogical Magazine, 46 (341) 421-425 doi:10.1180/minmag.1982.046.341.02 | Journal (article/letter/editorial) | | An occurrence of rare-earth-rich eudialyte from Ascension Island, South Atlantic C. HARRIS, G. CRESSEY... J. D. BELL, F. B. ATKINS, AND S. BESWETHERICK Department of Geology and Mineralogy, Parks Road, Oxford...resembling eudialyte in arfvedsonite/aegirine perthite granites. The only singlecrystal X-ray pattern and chemistry...chemistry has been found specimen found to contain eudialyte [spec. H in one granite block from the 5 Mile...30(1)] falls within group (iii). Ascension Island. To our knowledge, eudialyte has not Petrographically, this |  | | Report (volume) | | Carlton Victoria 3053, Australia DISTRIBUTORS USA and Canada Blackwell Scientific Publications Inc PO Box...granted by The Geological Society for libraries and other users registered with the Copyright Clearance...Typeset, printed and bound in Great Britain by William Clowes Limited, Beccles and London Library of...metasomatism--perspective and prospect vii ix 1 MENZIES, M. Alkaline rocks and their inclusions: a window...experimental studies 29 LE Bhs, M. J. Nephelinites and carbonatites 53 TWYMAN, J. D. & GITTINS, J. Alkalic |  | | Journal (article/letter/editorial) | | Earfh and Plonera~ Science Letters, 60 ( 1982) 79-85 ElsevierScientific Publishing Company. Amsterdam...composition of lead and strontium in lavas and coarse-gained blocks from Ascension Island, South Atlantic...Atlantic C. Harris, J.D. Bell and F.B. Atkins Department of Geology and Mmeralogv, University of Oxford, Parks...May 13, 1982 New Sr and Pb isotope data are presented for a selection of lavas and associated coarse-grained...coarse-grained blocks from Ascension Island. K-Ar dates for the lavas range up to 1.5*0.2 Ma. Initial “‘Sr / |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology (2018) 173:8 https://doi.org/10.1007/s00410-017-1433-2 ORIGINAL...Springer Nature 2017 Abstract Peralkaline syenite and granite dykes cut the Straumsvola nepheline syenite...29) and manifests itself in the presence of the Zr silicates eudialyte, dalyite and vlasovite, and the...nepheline syenite pluton, and the petrogenetic relationship of the dykes and the pluton cannot be related...exists between silicaundersaturated and oversaturated magmas. Major and trace element variations in the dykes |  | | Report (chapter) | | a g m a and fluid evolution in the lavas and associated granite xenoliths of Ascension Island Chris Harris...Harris and Simon M.F. Sheppard S U M M A R Y : The mildly alkaline lavas of Ascension Island evolved in...similar to the evolved lavas contain silicate glass and fluid inclusions which demonstrate that the original...original granite magma is due to sea-water addition and that this explains these differences. Sea-water interaction...interaction with high-level magma chambers on Ascension may have been the cause of the extensive pyroclastic |  | | Journal (article/letter/editorial) | | On the poikilitic nature of Jabal A1 Hasawinah eudialyte KHALED M. O u ~ University of AI Fatah, Department...Box 13258, Tripoli, Libya Abstract Poikilitic eudialyte outcrops in a strongly peralkaline phonolithic...Libya. Textural relationships reveal that the eudialyte has formed at a very late stage of the rock petrogenesis...its volatile (hydrous) nature and low R E E content. K~VWOR~S: eudialyte, phonolite, Jabal AI Hasawinah...Hasawinah, Libya. Introduction occurrence of eudialyte; (Na,Ca,REE)5(Fe2+,Mn)(Zr,Ti){(SiO309)2}(OH,C1) in Jabal |  | Jeffery, A. J., Gertisser, R., Jackson, R. A., O'Driscoll, B., Kronz, A. (2016) On the compositional variability of dalyite, K2ZrSi6O15: a new occurrence from Terceira, Azores. Mineralogical Magazine, 80 (4) 547-565 doi:10.1180/minmag.2016.080.018 | Journal (article/letter/editorial) | | JACKSON1, B. O’DRISCOLL1,2 AND A. KRONZ3 1 2 3 School of Physical and Geographical Sciences, Keele...Staffordshire ST5 5BG, UK School of Earth, Atmospheric and Environmental Sciences, The University of Manchester...the placement of substituting Hf and Ti in the octahedral site, and highlight the overall complexity...Fe, Mg and Ba. The combined dataset reveals that dalyite found within peralkaline granites and syenites...is generally defined by higher Na↔K substitution and lower Ti↔Zr substitution relative to dalyite from |  | | Journal (article/letter/editorial) | | Mineralogy and Petrology Contrib Mineral Petrol (1985) 91:74-81 9 Springer-Verlag1985 Hydrogen and oxygen...geochemistry of Ascension Island lavas and granites: variation with crystal fractionation and interaction...interaction with sea water* Simon M.F. Sheppard and Chris Harris** Centre de Recherches P~trographiques et G6ochimiques...Vandoeuvre-l~s-Nancy, France Abstract. Lavas and pyroclastics on Ascension Island contain plutonic blocks that include...ratios, F and C1 have been analysed on whole rocks and/or minerals for lavas and granites, and D/H ratios |  | | Report (issue) | | commonly as subrounded to irregularly shaped grains and aggregates of such grains. Twinning: Twin plane f010g...to (Na; K; Ca)2:00 Zr0:96 Si 3:91O 11 : (2) Ascension Island; corresponds to (Na; K; Ca)2:02 Zr0:97 Si...phase in nepheline syenites, syenitic pegmatites, and along the contact zone of a di®erentiated alkalic...blocks of peralkalic granite (Ascension Island). Association: Eudialyte, microcline, albite, lorenzenite...near Mt. Vavnbed, Lovozero massif, Kola Peninsula; and in the Burpala massif, about 120 km north of Lake |  | Sokolova, E., Hawthorne, F. C., Ball, N. A., Mitchell, R. H., Della Ventura, G. (2006) Vlasovite, Na2Zr(Si4O11), from the Kipawa alkaline complex, Quebec, Canada: crystal-structure refinement and infrared spectroscopy. The Canadian Mineralogist, 44 (6) 1349-1356 doi:10.2113/gscanmin.44.6.1349 | Journal (article/letter/editorial) | | CRYSTAL-STRUCTURE REFINEMENT AND INFRARED SPECTROSCOPY ELENA SOKOLOVA§, FRANK C. HAWTHORNE AND NEIL A. BALL Department...Si sites with a grand distance of 1.612 Å, and one octahedrally coordinated Zr site with ...split into two subsites, Na(2A) and Na(2B), with a separation of 0.829 Å, and the symmetry-related Na(2B)...octahedrally coordinated, and Na(2B) is [5]-coordinated, and their occupancies are 0.826(8) and 0.092(4) Na, respectively...respectively. Thus the Na(1) and aggregate Na(2) sites are each fully occupied. In the crystal structure |  | | Journal (article/letter/editorial) | | Taylor & Francis Informa Ltd Registered in England and Wales Registered Number: 1072954 Registered office:...Publication details, including instructions for authors and subscription information: http://www.tandfonline...Yevdokimov b a Institute of Precambrian Geology and Geochronology , USSR Academy of Sciences , Leningrad...platform. However, Taylor & Francis, our agents, and our licensors make no representations or warranties...opinions and views expressed in this publication are the opinions and views of the authors, and are not |  | | Journal (article/letter/editorial) | | printed in SMALLCAPITALS,subjects in lower-case roman, and localities in italics; book reviews are placed at...ABDUL-SAMAD, F. A., THOMAS, J. H., WILLIAMS,P. A., and SYMES, R. F., lanarkite, 499 AEGEAN SEA, Santorini...es, X-ray study, 459 Amphibole, microstructures and phase transformations, 395; Greenland, 283 Andradite...banded iron-formation assemblage, 127 ANGUS, N. S., AND KANARIS-SOTIRIOU, R., autometasomatic gneisses, 411...411 Anthophyllite, asbestiform, morphology and alteration, 77 Aragonite, atomic arrangements on twin |  | | Journal (article/letter/editorial) | | Contributions to Mineralogy and Petrology Contrib Mineral Petro! (1984) 86 : 155-158 9 Springer-Verlag...peralkaline melts can be explained. The high ks/ns and high Q calculated in some norms of peralkaline rocks...the mineral zircon in alkaline aqueous solutions and Goldschmidt (1954) concluded from available literature...then petrological (Chao and Fleischer 1960; Siedner 1964; Bowden 1966; Nicholls and Carmichael 1969; Weaver...Weaver et al. 1972) and experimental (Dietrich 1968 ; Larsen 1973) studies have provided growing evidence |  | | Journal (article/letter/editorial) | | Magmatic Inclusions in the Plutonic Ejecta of Ascension Island by CHRIS HARRIS* (Received 25 May 1984; revised...Plutonic blocks' in the volcanic and pyroclastic rocks of Ascension Island contain a variety of silicate... mainly in the intermediate (monzonite-syenite) and granite types. The silicate melt inclusions consist...density CO2 + H 2 0 inclusions, predominantly vapour and (iii) high density approximately pure H2O inclusions...5 wt. per cent H2O before saturation was reached and homogenization temperatures show the trapping of |  | Sjöqvist, Axel S.L., Cornell, David H., Andersen, Tom, Christensson, Ulf I., Berg, Johan T. (2017) Magmatic age of rare-earth element and zirconium mineralisation at the Norra Kärr alkaline complex, southern Sweden, determined by U–Pb and Lu–Hf isotope analyses of metasomatic zircon and eudialyte. Lithos, 294. 73-86 doi:10.1016/j.lithos.2017.09.023 | Journal (article/letter/editorial) | | Accepted Manuscript Magmatic age of rare-earth element and zirconium mineralisation at the Norra Kärr alkaline...determined by U–Pb and Lu–Hf isotope analyses of metasomatic zircon and eudialyte Axel S.L. Sjöqvist...Johan T. Berg , Magmatic age of rare-earth element and zirconium mineralisation at the Norra Kärr alkaline...determined by U–Pb and Lu–Hf isotope analyses of metasomatic zircon and eudialyte. The address for the...manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published |  | | Journal (article/letter/editorial) | | X-Ray and Optical Data for a Rare Earth-Poor Eudialyte from the North-Central Alaska Range By Neil E...Geological Sciences, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, U.S...S.A. Mickey E. Gunter Department of Geology and Geological Engineering, University of Idaho, Moscow...A. Diana N. Solie Alaska Division of Geological and Geophysical Surveys, 3700 Airport Way, Fairbanks...U.S.A. Charles R. Knowles Department of Geology and Geological Engineering, University of Idaho, Moscow |  | | Journal (article/letter/editorial) | | concentrations of zirconium and hafnium in some igneous and metamorphic rocks and minerals Department C.... KENT BROOKS* of Geology and Minorelogy, Parks Road, Oxford (Receked 27 October 1969; accepted in revised...1969) and hafnium determinstions on 47 rocks snd miner& of wideIy different compositions and geogrephical...ratios, as were some strongly differentiated rocks and certain minerals. THIS note presents the results...results of some recent determinations of zirconium and hafnium in representative members of several contrasted |  | | Journal (article/letter/editorial) | | Islands) F. RIDOLFI1, A. RENZULLI1,*, P. SANTI1 1 2 AND B. G. J. UPTON2 Istituto di Vulcanologia e Geochimica...Urbino, I-61029 Urbino, Italy Department of Geology and Geophysics, University of Edinburgh, EH9 3JW Edinburgh...Islands) are divisible into (1) silica-undersaturated and (2) silica-saturated/oversaturated groups. The first...syenites of both groups crystallized at shallow depths and whole-rock geochemistry shows that they have compositions...during which most of the feldspar growth occurred; and (3) a late interstitial stage. Crystallization of |  | | Journal (article/letter/editorial) | | SUBSOLIDUS PROCESSES IN AN AGPAITIC SYSTEM USING EUDIALYTE TEXTURES AND COMPOSITION: A CASE STUDY FROM TAMAZEGHT...Julian SCHILLING§, Michael A.W. MARKS, Thomas WENZEL and Gregor MARKL Universität Tübingen, Institut für Geowissenschaften...cross-cut by carbonatite diatremes, and dyke rocks of both carbonatite and silicate lithology. In spatially...silicate unit of the complex (malignites) contains eudialyte-group minerals (EGM) as index phases for agpaitic...stable over a wide range of temperature and chemical composition and readapt their composition to changing |  | Atanasova, Petya, Marks, Michael A.W., Frenzel, Max, Gutzmer, Jens, Krause, Joachim, Markl, Gregor (2020) Fractionation of geochemical twins (Zr/Hf, Nb/Ta and Y/Ho) and HREE-enrichment during magmatic and metamorphic processes in peralkaline nepheline syenites from Norra Kärr (Sweden). Lithos, 372. 105667pp. doi:10.1016/j.lithos.2020.105667 | Journal (article/letter/editorial) | | geochemical twins (Zr/Hf, Nb/Ta and Y/Ho) and HREE-enrichment during magmatic and metamorphic processes in peralkaline...geochemical twins (Zr/Hf, Nb/Ta and Y/Ho) and HREE-enrichment during magmatic and metamorphic processes in peralkaline...acceptance, such as the addition of a cover page and metadata, and formatting for readability, but it is not...will undergo additional copyediting, typesetting and review before it is published in its final form,...may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain |  | Wu, Fu-Yuan, Yang, Yue-Heng, Marks, Michael A.W., Liu, Zhi-Chao, Zhou, Qin, Ge, Wen-Chun, Yang, Jing-Sui, Zhao, Zi-Fu, Mitchell, Roger H., Markl, Gregor (2010) In situ U–Pb, Sr, Nd and Hf isotopic analysis of eudialyte by LA-(MC)-ICP-MS. Chemical Geology, 273 (1) 8-34 doi:10.1016/j.chemgeo.2010.02.007 | Journal (article/letter/editorial) | | e m g e o In situ U–Pb, Sr, Nd and Hf isotopic analysis of eudialyte by LA-(MC)-ICP-MS Fu-Yuan Wu a,⁎...of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, P. O. Box...Crust-Mantle Materials and Environments, School of Earth and Space Science, University of Science and Technology...Rudnick Keywords: U–Pb ages Sr, Nd and Hf isotopic ratios Eudialyte Laser ablation Agpaitic syenites ...syenites. Given that eudialytes are easily altered and commonly contain inclusions of earlier-crystallized |
|
