 | | Report (chapter) |
| of the mafic–intermediate dykes and intrusions in the İstanbul Zone. Mafic dykes are represented by calc-alkaline...alkaline lamprophyre and diabase. Intermediate dykes and subvolcanics are andesitic to dacitic in composition...Ma (Lower Paleocene–Danian) for the intermediate dykes, and 58.9 ± 1.8 Ma (Upper Paleocene–Thanetian) for...87Sr/86Sr(i) values of the mafic and intermediate dykes and small stocks span a range from 0.703508 to 0...NdTDM model ages range between 0.46 and 0.77 Ga. Dykes are enriched in large ion lithophile elements (LILEs) |
 | | Journal (article/letter/editorial) |
| Paleogene Faroe Islands basalt plateau are presented. The samples are mainly dykes and were formed by the...four main types: Ž1. Low-Ti picritic and olivine basaltic dykes ŽMgO ) 10%. with N-type MORB incompatible...206 Pbr204 Pb s 17.9–18.4. Ž2. Low-Ti basaltic dykes ŽMgO- 10%. also with unfractionated HREEs but trending...and lower 206 Pbr204 Pb. Ž3. High-Ti magnesian basalt lavas with isotopic compositions like some Atlantic...fractionated HREEs ŽSmrYbcho f 2.4.. Ž4. High-Ti basalt dykes are relatively enriched in the highly incompatible |
 | | Journal (issue) |
| and the younger DYKES Mineralogy of the Gower-Lidgbird Lavas and the younger DYKES (a) Plagioclase...Lord Howe Island volcanics are of typical alkali basalt composition, but show considerable textural and...mineral phases, 9. namely plagioclase, pyroxene, olivine and iron ore in particular to investigate the to...altered groups of lavas and the older, altered dykes were briefly visited. The following groups of volcanic...of Salmon beach. 6. A series of basic sheets and dykes cutting the inclined altered series and parPoint |
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| and Pitchstones 3 5 5 11 Petrochemistry The Basalt-hawaiite-mugearite Series Salic Volcanics 13 13...Biotite and Amphibole 22 33 33 34 Discussion The Basalt-mugearite Series The Status of the Rhum Mugearites...Mugearites The Derivation of Alkali Olivine-basalt The Origin of the Pitchstones and Felsites 35 Analytical...Western Scotland, assured the British Tertiary Province of a special status in fashioning petrological...the Hawaiian Islands-con cluded that the alkali olivine-basalts and tholeiites there were chemically and |
 | Holwell, David A., Mitchell, Chloe L., Howe, Grace A., Evans, David M., Ward, Laura A., Friedman, Richard (2017) The Munali Ni sulfide deposit, southern Zambia: A multi-stage, mafic-ultramafic, magmatic sulfide-magnetite-apatite-carbonate megabreccia. Ore Geology Reviews, 90. 553-575 doi:10.1016/j.oregeorev.2017.02.034 | Journal (article/letter/editorial) |
| (olivinites, olivine-magnetite rocks, and phoscorites), poikilitic gabbro and olivine basalt/dolerite dykes, brecciated...transitions, through tube-like chonoliths into bladed dykes (Barnes et al., 2016a). If Munali conforms to one... exemplified by sulfide breccias in the offset dykes at Sudbury (e.g. Lightfoot and Farrow, 2002; Ripley...relationship with the CGU and includes barren olivine dolerite with quench textures. The mineralised...mineralogical analysis at the University of Leicester. Olivine compositions were determined at the University |
 | | Journal (article/letter/editorial) |
| Publishers B.V., Amsterdam 87 High K/Na alkaline mafic dykes near Radok Lake, northern Prince Charles Mountains...and Cook, N.D.J., 1992. High K/Na alkaline mafic dykes near Radok Lake, northern Prince Charles Mountains...East Antarctica. Lithos, 29: 87-105. Thin mafic dykes emplaced in ca. 1000 Ma granulite-facies basement...(1) plagioclase_+olivine-phyric, (2) clinopyroxene + olivine-phyric and (3) aphyric dykes. Clinopyroxene...Clinopyroxene "phenocrysts" in group (2) dykes comprise low-P phenocrysts, xenocrysts of possible mantle derivation |
 | | Journal (article/letter/editorial) |
| abundant tholeiite and rare alkaline dykes. At leastfivegenerations of dykes have been recognized on the basis...defined events (viz. c. 2400,1800, and 1400 Ma). Dykes in the southwestern part of the Vestfold Block were...contamination cannot be discounted. The oldest dykes, a diverse group of high-Mg tholeiites, and the...of their mantle source region. 2400 Ma high-Mg dykes in Enderby Land have virtually identical chemical...region like that of the c. 1800 Ma Vestfold Block dykes. Hence, both Sr isotopic and geochemical data indicate |
 | | Journal (issue) |
| regional petrology of the East-European alkaline province, but it is also the most complete and comprehensive...clinopyroxene 120 Plate II Porphyritic Pyroxene - Olivine Basalt, Group 2 . . 1. Phenocryst of diopsidic clinopyroxene...1. Clinopyroxene with olivine showing partial serpentinisation 2. Turbid olivine phenocrysts containing...X-ray powder photograph of olivine from Baniata. 2. Non-porphyritic olivine basalt (Group 4) showing abundant...4,000 ft. . . . . . The relative abundance of olivine, clinopyroxene and feldspar phenocrysts in the |
 | | Report (chapter) |
| 1970; Boudjema 1987), and acidic lava flows and dykes of Permian-Triassic age have been reported from...(1984). In central Sinai basaltic lava flows and dykes give 4~ ages ranging from 273 to 240 Ma (Steinitz...reported a K - A r age of 238 + 3 Ma for an olivine basalt from Farsh E1 Azraq. Triassic-Liassic magmatism...the Mamonia volcanic rocks are mid-ocean ridge basalt (MORB)-Iike tholeiitic pillow lavas. Interpillow...extending from Oman to southern Turkey. The Zagros province was magmatically active from Permian to Dogger |
 | | Report (chapter) |
| of diamond in the North African diamondiferous province M. Kahoui, Y. Mahdjoub and F. V. Kaminsky Geological...of diamond in the North African diamondiferous province M. KAHOUI1, Y. MAHDJOUB1 & F. V. KAMINSKY2 1 ...and may form a new, North African diamondiferous province (Kaminsky et al. 1992b). In the 1990s, we suggested...on August 23, 2014 NORTH AFRICAN DIAMONDIFEROUS PROVINCE of the Precambrian Reguibat rise of the WAC (Kahoui...diameter), a great number of lamprophyric and doleritic dykes, and our first pyrope garnet and ruby were found |
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| hypabyssal rocks, apart from the Shap granite, its dykes, and a few minor intrusions, are treated as connections...the pyroxene pheno·crysts may be orthorhombic. Olivine is unknown. Almost every possible variation occurs...the actual temperature and the fusion-point. A basalt flo\t'S readily at a temperature slightly above...Skidda\\' Slate, where exposed, is a.lmost free from dykes, except a very few of distinct composition. The...Heft. 152, p. 127. 16:z J. F. N. GREEN ON basalt; and it therefore follows that under submarine |
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| slightly seaward-dipping layers of hard compact olivine-basalt and coarse agglomerate, with minor discontinuous...trachyte anti trachytic dykes, as well as a ramifying system of olivine-basalt dykes having a very rough...disintegration, under submarine conditions, of the doleritic basalt magma. Raised reefs and beaches composed of t1nconsolidated...compact olivine-basalt and coarse agglomerate intruded by endogenous domes of trachyte and · dykes of olivine-basalt...parallel flows of olivine-basalt, coarse agglomerate and subordinate tuffs. The olivine-basalts show all |
 | | Journal (article/letter/editorial) |
| etr. Econ, Geol. 70, 265-285, 1975 TEXTURES AND OLIVINE HOROMAN ULTRAMAFIC KIYOAKI Department FABRICS...the (Niida, textures 1974), the of this olivine massif formation, study which megascopic ...consisted of coarse deformed olivine, polygonal olivine, and fine olivine. Crossed nicols. 2: Negative...Fig. 2. and olivine fabrics of the Horoman ultramafic rocks 1 and 2: Polygonal olivine (P-ol) showing...and 4: Coarse deformed olivine (C-d-ol) with kink bands. [100] axis of olivine runs from top to bottom |
 | | Book |
| udstones, conglomerates, thin coals, seatrocks,. local basalt lavas, one thin 1narine li1nestone Group fnverclvde...conglome;ates, siltstones, • n1udstones, local basalt lavag :' basalt,. basaltic andesite and andesite : )a\'as...l'vteasures J top A Dinantian (Tournasian) -- ·· - olivine basillt lavas ; Passage Forn1ation Nan1urian ...grey\vacke sandstones and si]tstones pyroxene- phyric basalt lavas - - - - - - - - - - - - - -...(CACL) c<-1 nsists mostly of py.roxc11c-phyric basalt .J lavas, with some i n tercalated volcaniclastic |
 | Sahoo, Samarendra, Rao, N.V. Chalapathi, Monié, Patrick, Belyatsky, B., Dhote, Prashant, Lehmann, B. (2020) Petro-geochemistry, Sr Nd isotopes and 40Ar/39Ar ages of fractionated alkaline lamprophyres from the Mount Girnar igneous complex (NW India): Insights into the timing of magmatism and the lithospheric mantle beneath the Deccan Large Igneous Province. Lithos, 374. 105712pp. doi:10.1016/j.lithos.2020.105712 | Journal (article/letter/editorial) |
| lithospheric mantle beneath the Deccan Large Igneous Province Samarendra Sahoo, N.V. Chalapathi Rao, Patrick...lithospheric mantle beneath the Deccan Large Igneous Province, LITHOS (2020), https://doi.org/10.1016/j.lithos...lithospheric mantle beneath the Deccan Large Igneous Province of Samarendra Sahoo1, N.V. Chalapathi Rao1,*...basalts (ca. 69 Myr) of the Deccan Large Igneous Province (Deccan LIP) in the Kathiawar plateau of NW India...of fractionated (Mg#: 36.3- 43.6) lamprophyre dykes (younger intrusives) are reported from two widely |
 | | Book |
| Elliot: Major oxide chemistry of the Kirk¬ patrick basalt, central Transantarctic Mountains 413 A. B. Ford:...composition of strontium and silica con¬ tent of Mesozoic basalt and dolerite from Ant¬ arctica . 617 VI. The Sub-Antarctic...a submarine ridge separating them. The eastern province is characterized by a complex magnetic field presumably...orthogonal to it. The ano¬ malies of the western province form a system of concordantly orientated, regular...(Griffiths and others, magnetic a boundary province is character¬ firm conclusion about the oceanic |
 | | Journal (article/letter/editorial) |
| quartz monzonite lenses and/or bodies and mafic dykes are also observed in the Demirköy Igneous Complex...granite (main body), c) syenite/monzonite and d) mafic dykes. Geochemical data and modelling results favour a...the easternmost member of the Balkan metamorphic province, consisting of three large metamorphic massifs:...content of the host rocks is shown in Fig. 3. Olivine is rarely seen and is represented by small euhedral...country rocks and granite or in several small aplitic dykes throughout the whole pluton. The quartz monzonite-syenite |
 | | Report (issue) |
| Composite Sills and Dykes : General Featu1·es, XIII. Composite Sills and Dykes : Detailed Description...·XVII. Basic Dykes: Field-Relations, XVIII. Basic Dykes: General Petrography, XIX. Basic Dykes: Tacl1ylytic...Tacl1ylytic Selvages, XX. Basic Dykes: Xenoliths, XXI. Basic Dykes and Sheets of the Cuillins, XXII. Later Peridotites...Trachyte and Tracl1y-Andesite Dykes, XXIV. Augite-Andesite and Pitchsto11e Dykes, XXV. General Revie,v of...Scalpay, Section to illt1strate the structure of the basalt plateaux, Section across the volcanic vent of Kilchrist |
 | | Journal (article/letter/editorial) |
| flat moor above the 300-feet contour. Numerous dykes are seen to strike out on the old sea cliffs and...the ridge called the Sheugbends, of trachyte and olivine dolerite, 300 feet high, seen from Millport Bay...as already stated, is the very great number of dykes and sills of intrusive igneous rocks that appear...are nearly all of carboniferous age, the trachyte dykes that penetrate the Old Red Sandstone being the oldest...the east side. The most numerous are the olivine-basalt dykes, especially on the north-east shore. As |
 | | Book |
| highly sheared and c,,11torted withi11 fa11lt z,,ne dykes, sills, pl11gs and vents • 450-55() 3() + Geology...Palaeogene dyke swarm Regionally persistent Pa laeogene dykes • I ""- ,�· • / • ---- • • --- ,.. . ✓ ·........ . -· Late Carboniferous quartz-dolerite dykes Doleritic sills, Silesia n to Early Permian Felsitic...Intrusive igneous rocks 87 Plugs and vents 87 Sills 9 1 Dykes 94 Thirteen Geophysics 99 Gravity data 99 Aeromagnetic...92 Whole rock analyses of Palaeogcr1c tholeiitic dykes from the Irvine district and adjacent areas 97 S11mma1 |
 | | Report (issue) |
| Smith Woodward. The volcanic rocks a�d' the trap dykes had been investigated by Sir Archibald Geikie, Prof...series of micro-• scopic sections of Orkney trap dykes, among which were the first in which the presence... • • • Camptonites • • • • Bostonites, etc. • Olivine.. basalts • • • • • • Monchiquites • • Nepheline-monchiquites...occurrences of basaltic lavas and a number of intrusive dykes, the islands are built up of flagstones and sandstones...also mentions the occurrence of basalt veins at Yescanaby, and of basalt covered.by sandstone in Shapinsay |
 | | Journal (article/letter/editorial) |
| intrusion (G4) in the form of a small boss and several dykes. Extensive alteration akin to greisenisation is...Caledonian Newer Granites of Scotland. Several olivine-basalt dykes traverse the area and represent an entirely...area. Accompanying the main sheets are numerous dykes of pegmatite and aplite which follow the general...few rnicrogranite dykes of considerable width are associated with numerous thin dykes of microgranite,...fluids. The great majority of the sheets and minor dykes can be shown to be intrusive; the dyke-walls are |
 | | Report (issue) |
| flat in nature resembling a table top composed of Basalt. Most of the east flowing rivers originate in the...conglomerate with cross bedded quartzite, amygdular meta-basalt, quartz-biotite-chlorite garnet schist, talc tremolite-chlorite...assemblage of this schist belt is pillowed meta basalt, meta rhyolite tuff, magnetite chert, autoclastic...and granodiorite; and with minor distribution of basalt. Jonnagiri Schist Belt: The Jonnagiri Schist Belt...lower Dona Formation comprising amphibolites, meta basalt meta dacite, dacite and metarhyolite with concordant |
 | IMMENHAUSER, ADRIAN, SCHREURS, GUIDO, GNOS, EDWIN, OTERDOOM, HEIKO W., HARTMANN, BERNHARD (2000) Late Palaeozoic to Neogene geodynamic evolution of the
northeastern Oman margin. Geological Magazine, 137 (1) 1-18 doi:10.1017/s0016756800003526 | Journal (article/letter/editorial) |
| and cut by a network of rhyolitic and doleritic dykes (Gass et al. 1990; Würsten et al. 1990; Wyns et...The intrusion of Upper Eocene tholeiitic olivine basalt dykes in the south of the Batain area (37–44 Ma; |
 | | Report (issue) |
| cycle of erosion occurring later than the Tertiary basalt flows. The present day landforms are the result...Liassic and Cretaceous rocks are overlain by Tertiary basalt lavas. These rocks are preserved in a large shallow...values exceed 0 .5 mGal, and the largest, close to nor th -eastern Arran, is 1 .07 mGal. The error in the...g/cm 3 ). Thick Fermo -Carboniferous sills of olivine - dolerite ( density 2 .90 g/ cm3 ) in central...communication) and Walker ( 1 969), in the region to the nor th -east of the main Firth, are in general accord |
