 | | Journal (article/letter/editorial) | | intermediate and mafic pyroclastics, lavas, and dykes occupy a NW-trending zone through the Whitsunday...rare basalt flows. The sequence is cut by abundant dykes, especially in the northern region and adjacent...ranging from dolerite through andesite, dacite and rhyolite. Dyke orientations show maxima between NW-NNE..."orogenic" volcanics. Phases include plagioclase, augite, hypersthene (uralitised), magnetite, ilmenite...ranges continuously from basalt to high-silica rhyolite, with calc-alkali to high-K affinities, and geochemical |  | | Journal (article/letter/editorial) | | flow, rhyolitic dykes, a trachyandesitic lava flow and basaltic trachyandesitic dykes. Existence of mafic...magmas of rhyolite lava and dykes, and trachyandesite lava and basaltic trachyandesite dykes were derived...trachyandesitic lava flows and basaltic trachyandesitic dykes. Oxide phases in all rocks are magnetite and ilmenite...intermediate-mafic mixing. The rhyolitic lava flow and dykes evolved in relatively shallower crustal magma chambers...2007 KEY WORDS mixing; mingling; Turkey; Malatya; rhyolite; trachyandesite; mineralogical disequilibrium; |  | Cucciniello, Ciro, Sheth, Hetu, Duraiswami, Raymond A., Wegner, Wencke, Koeberl, Christian, Das, Tarulata, Ghule, Vivek (2020) The Southeastern Saurashtra dyke swarm, Deccan Traps: Magmatic evolution of a tholeiitic basalt–basaltic andesite–andesite–rhyolite suite. Lithos, 376. 105759pp. doi:10.1016/j.lithos.2020.105759 | Journal (article/letter/editorial) | | a tholeiitic basalt–basaltic andesite–andesite–rhyolite suite Ciro Cucciniello a,⁎, Hetu Sheth b, Raymond...widespread occurrence of mafic enclaves in the rhyolite dykes suggests that processes such as magma mixing...the Western Ghats, with more randomly oriented dykes than the 2 C. Cucciniello et al. / Lithos 376–377...features and localities mentioned in the text. Dykes of the Eastern, Central, and Southeastern Saurashtra...Geochemical (including Sr-Nd-Pb isotopic) data on dykes of the three swarms (Vanderkluysen et al., 2011 |  | | Report (chapter) | | strained schist and phyllite with minor tuff, rhyolite, marble and greenstone of the Mississippian Takhini...the footwall are variably deformed and include augite-phenocrystic basalt, volcaniclastic, and sedimentary...granodiorite, quartz diorite and numerous sub-volcanic rhyolite dykes are in intrusive or fault contact with the...THSZ on Tally Ho Mountain; (d) augite phenocrysts in undeformed augite-phenocrystic basalt adjacent to...lithological units Augite-phenocrystic basalt. East of the THSZ is a massive augite-phenocrystic to aphyric |  | Waight, T.E., Weaver, S.D., Maas, R., Eby, G.N. (1998) French Creek Granite and Hohonu Dyke Swarm, South Island, New Zealand: Late Cretaceous alkaline magmatism and the opening of the Tasman Sea*. Australian Journal of Earth Sciences, 45 (6) 823-835 doi:10.1080/08120099808728438 | Journal (article/letter/editorial) | | feldspar syenite. Spatially associated rhyolitic dykes are considered to represent hypabyssal equivalents...varieties dominate the swarm, with rare phonolite dykes also present. Geochemical compositions of French...and Greenland Group are cut by a swarm of mafic dykes called the Hohonu Dyke Swarm (Waight 1994). Concentrations...much of the Hohonu Ranges, blue to cream-grey rhyolite dykes (up to 15 m wide) intrude the Deutgam Granodiorite...Granodiorite. Chemical similarities suggest these dykes represent hypabyssal equivalents of French Creek |  | | Journal (article/letter/editorial) | | associated with a swarm of dykes of doleriteibasalt, minor trachyte and rhyolite composition. The dolerites...peralkaline trachyte and subalkalineiperalkaline rhyolite with alkali feldspar and quartz f alkali amphibole...and trace element geochemistry indicate that the dykes may be regarded as a cogenetic dolerite-peralkaline...(oligoclase) + Fe-Ti oxide apatite results in peralkaline rhyolite. Rarer subalkaline rhyolites result from fractionation...trachyte)/rhyolite bimodality reflects rapid crystallization of basalt magma to trachyte (and rhyolite) over |  | | Journal (article/letter/editorial) | | form acid dykes, pitchstone margins of acid intrusives and lavas. In Japan, Fe-rich augite, ferropigeonite...saponite. and Tadami areas, Northeast Japan 421 Augite-hypersthene perlite, Gomizawa, west of Tadami....color and consists of phenoycrsts of plagioclase, augite and hypersthene in dark brown glass. Plagio clase...clase (An38-40)is euhedral and has zonal structure. Augite is euhedral and pale greenish in color. Hypersthene...Kuro sawa, Tadami. 3. Glass of groundmass of ferro augite perlite, Suwa pass, Tsugawa. 2 and 3 were analyzed |  | | Journal (article/letter/editorial) | | ring-dykes intrusive into upturned sandstones, and cross-cutting non-arcuate dykes of rhyolite, comendite...injected by numerous narrow steeply-dipping ring-dykes. Later dykes and breccia necks have pierced the complex...complex and country rocks. Outside the zone of ring-dykes the surface rocks belong to the Jurassic Walloon...masses of Mt. Greville (comendite), Mt. Moon (rhyolite) and Minto Crags (a ring-dyke of comendite), respectively...micropegmatite and as separate, larger grains. Hornblende, augite and biotite are confined to the groundmass, where |  | | Journal (article/letter/editorial) | | Mesozoic granitoid batholiths, stocks and granitoids dykes are common throughout Alkaline igneous rocks the...metamorphic rocks Pz alkaline cryptoexplosive breccia dykes in Pt metamorphic rocks Same as that of Jiaojia...(Ar) Quartz monzonite stocks (116-132 Ma) & rhyolite dykes (122±1 Ma) Same as that of Yuerya (3) Anjiayingzi...chambers native Au & ele Diabase, aplite & granite dykes or stocks (Mz) EW-trending qtz veins, Py, gn, mag...intrusive NW-trending alteration Py, cpy, gn, sp, bmt, dykes (Pz & Mz) zones & chambers bn, mo & mag gabbro |  | | Journal (article/letter/editorial) | | of Spherulitic Felsite in Papa Stour, . . 371 4. Dykes— 373 a. Binary Granites, . . . 373 6. Quartz-felsites...Sheet, . Sandsting Sheet, . Papa Stour Sheet, . 5. Dykes— Acidic Rocks. Binary Granites . and Quartz-felsites...the order of succession is disturbed by intrusive dykes; but near Tang Wick Ness the lavas are seen dipping...may be grouped in three divisions—(1) Sheets, (2) Dykes, (3) Necks. Of these divisions the first is the...come to treat of their microscopic characters. 2. Dykes and Veins.—One of the most interesting features |  | Sun, Ming-Dao, Chen, Han-Lin, Zhang, Feng-Qi, Wilde, Simon A., Dong, Chuan-Wan, Yang, Shu-Feng (2013) A 100Ma bimodal composite dyke complex in the Jiamusi Block, NE China: An indication for lithospheric extension driven by Paleo-Pacific roll-back. Lithos, 162. 317-330 doi:10.1016/j.lithos.2012.11.021 | Journal (article/letter/editorial) | | composite dyke complex, consisting of rhyolite and dolerite dykes, was emplaced into Cretaceous volcanic...in the Jiamusi Block of NE China. The dolerite dykes are sub-vertical, strike north-south, and intruded...intruded into both the country rocks and rhyolite dykes soon after the latter solidified. SHRIMP zircon U–Pb...dating shows that the rhyolite dykes were emplaced at 100 ± 2 Ma and the dolerite dykes were also most likely...likely emplaced at 100 ± 2 Ma. The rhyolite is characterized by enrichment in large-ion lithophile elements |  | Pisarevsky, Sergei A., Biswal, Tapas Kumar, Wang, Xuan-Ce, De Waele, Bert, Ernst, Richard, Söderlund, Ulf, Tait, Jennifer A., Ratre, Kamleshwar, Singh, Yengkhom Kesorjit, Cleve, Mads (2013) Palaeomagnetic, geochronological and geochemical study of Mesoproterozoic Lakhna Dykes in the Bastar Craton, India: Implications for the Mesoproterozoic supercontinent. Lithos, 174. 125-143 doi:10.1016/j.lithos.2012.07.015 | Journal (article/letter/editorial) | | and geochemical study of Mesoproterozoic Lakhna Dykes in the Bastar Craton, India: Implications for the...Available online 25 July 2012 Keywords: Paleomagnetism Dykes Supercontinent Columbia Proterozoic India a b s...t r a c t Palaeomagnetic analysis of the Lakhna Dykes (Bastar Craton, India) yields a palaeopole at 36...U\Pb zircon age obtained from one of the rhyolitic dykes is 1466.4 ± 2.6 Ma (MSWD = 0.21, concordia age based...Major and trace element analyses of the Lakhna Dykes show shoshonitic and high-K calc-alkaline affinities |  | Katzir, Y., Litvinovsky, B.A., Jahn, B.M., Eyal, M., Zanvilevich, A.N., Valley, J.W., Vapnik, Ye., Beeri, Y., Spicuzza, M.J. (2007) Interrelations between coeval mafic and A-type silicic magmas from composite dykes in a bimodal suite of southern Israel, northernmost Arabian–Nubian Shield: Geochemical and isotope constraints. Lithos, 97 (3) 336-364 doi:10.1016/j.lithos.2007.01.004 | Journal (article/letter/editorial) | | mafic and A-type silicic magmas from composite dykes in a bimodal suite of southern Israel, northernmost...alkaline quartz porphyry dykes, rare mafic dykes, and numerous composite dykes with felsic interiors and...chemically corresponds to A-type granite. Composite dykes with either abrupt or gradational contacts between...at depth and continued during emplacement of the dykes. Oxygen isotope ratios of alkali feldspar in quartz...reveal significant crustal contribution to the rhyolite magma, suggesting that mafic and A-type silicic |  | Mbowou, G. I. B., Lagmet, C., Nomade, S., Ngounouno, I., Déruelle, B., Ohnenstetter, D. (2012) Petrology of the Late Cretaceous peralkaline rhyolites (pantellerite and comendite) from Lake Chad, Central Africa. Journal of GEOsciences, 57 (2) 127-141 | Journal (article/letter/editorial) | | quartz ± alkali feldspar ± fluoro-arfvedsonite ± augite–hedenbergite ± aegirine ± fayalite (Fa97–99) and...Lake Chad will be presented and compared to other rhyolite occurrences from the “Cameroon Hot Line”. These...weathered reddish brown rhyolite, which is cut by greenish dark rhyolitic dykes. This volcano of c. 15–20...sedimentary rocks, which is made up of greenish dark rhyolite belonging to the inner core of the small lava...(Carignan et al. 2001). The dating of a peralkaline rhyolite sample from Lake Chad (Hadjer el Hamis, Tab. 1) |  | | Journal (article/letter/editorial) | | Corsica basement involved in the Alpine orogeny. Rhyolite dykes crosscutting the gabbroic complex of Bocca...this question, we have examined peralkaline rhyolite dykes cropping out in the southern sector of Tenda...whole-rock major-element analyses of peralkaline rhyolite samples. To obtain robust geothermobarometric...complex is crosscut by diffuse dykes of doleritic basalt and porphyritic rhyolite, both showing chilled margins...tonalites), the granitoids and the crosscutting dykes display the overprint of greenschist- over blueschist-facies |  | | Journal (article/letter/editorial) | | Archaean, Black Range dolerite, conglomerates, mafic dykes, phreatomagmatic processes, Pilbara Craton. INTRODUCTION...cases, dykes erupt magma to the surface in fissure eruptions. However, in many cases, igneous dykes intrude...Ernst et al. 2001). Locally, the surface above dykes is deformed into narrow rift basins prior to eruption...younger diatremes in linear zones, called pebble dykes, which have rounded fragments of country rock in...complexes and greenstones, the Fortescue Group and dykes of the Black Range dolerite suite. B, Black Range |  | | Journal (article/letter/editorial) | | 3190/jgeosci.280 Original paper Anorogenic Early Permian dykes in the western Mongolian Altai – petrography, geochemistry...Corresponding author A variety of felsic and mafic dykes grouped into swarms intruded the Lower Palaeozoic...Orogenic Belt (CAOB), western Mongolian Altai. The dykes reach a thickness of 0.5–20 m, length of approximately...transitional calc-alkaline to alkaline character of the dykes indicate magma production through partial melting...conventional whole-rock K–Ar dating of mafic and felsic dykes yielded ages ranging from 300 ± 9 to 281 ± 9 Ma |  | Maino, Matteo, Dallagiovanna, Giorgio, Gaggero, Laura, Seno, Silvio, Tiepolo, Massimo (2012) U-Pb zircon geochronological and petrographic constraints on late to post-collisional Variscan magmatism and metamorphism in the Ligurian Alps, Italy. Geological Journal, 47 (6) 632-652 doi:10.1002/gj.2421 | Journal (article/letter/editorial) | | orthogneisses derived from K-rich rhyolite protoliths and minor rhyolite dykes. However, on account of subsequent...of zircon from the Barbassiria Orthogneisses and dykes was undertaken to unravel the relationships between...Carboniferous), and constrain the age of a subsequent rhyolite dyke emplacement event to 260.2 3.1 Ma (i.e...Carboniferous period. Emplacement of late-stage rhyolite dykes that cut the Barbassiria Orthogneisses is linked...linked to a diffuse episode of Late Permian rhyolite volcanism that is commonly observed in the Ligurian |  | Fortey, N. J., Cooper, A. H., Henney, P. J., Colman, T., Nancarrow, P. H. A. (1994) Appinitic intrusions in the English Lake District. Mineralogy and Petrology, 51 (2) 355-375 doi:10.1007/bf01159737 | Journal (article/letter/editorial) | | are minor intrusions of calc-alkaline, hornblende-augite rich, dioritic to picritic bodies reminiscent of...which includes augite-phyric meladiorite and pyroxenite; others include the 'picrite' (augite-meladiorite...Bridge is modelled as fractionation of olivine, augite, hornblende and chromite, and a similar process...remain poorly resolved. This paper is centred on the augite-phyric dioritic intrusion within the Skiddaw Group...ultramafic bodies, which include the Dash and Barkbeth augite-hornblende meladiorites (formerly described as |  | | Journal (article/letter/editorial) | | coral:rises a suite of traehytic and rhyolitic dykes. In each complex a zimilar suite of trachytie and...loss less se.vere; the majority of the trach)~e/rhyolite dyke rocks are mildly peralkalic. The central...aesNarssaq complex since a swarm of ENE trending dykes cut the latter but are truncated by the former....to hedenbergites with some increase in aegirine-augite solid solution in the lower layered series but...majority ef the ENE dykes. After the initial intrusion of small stocks (or ring-dykes ?) of microsyenite |  | | Report (chapter) | | divided into three groups: A, inland alkaline lavas, dykes and intrusive complexes of nephelinitic parentage;...mildly-alkaline to nephelinitic mafic lavas and dykes mostly in areas that previously experienced tholeiitic...tholeiitic magmatism; C, salic subalkaline to alkaline dykes and intrusive complexes related to group B. All...The basic components are equivalent to alkaline dykes, whereas the salic component is partly derived from...magmat&m in E Greenland systems. Mafic alkaline dykes are abundant. The complex may contain as much as |  | | Journal (article/letter/editorial) | | Silicic large igneous province Melt inclusion Rhyolite Fluorine Australia Mesoproterozoic a b s t r...comparable with flood basalts (e.g. Star Mountain Rhyolite, Trans-Pecos, Henry et al., 1988; Yardea Dacite...volcanic centres. Evenly porphyritic dacite and rhyolite are interbedded with ignimbrites and volumetrically...compositionally homogeneous felsic (dacite and rhyolite) massive lavas (Allen and McPhie, 2002; Allen... Kfeldspar, orthopyroxene (pigeonite Mg#24–43, augite Mg#30–53), Fe–Ti oxide, ±quartz in a quartz-feldspar |  | | Report (volume) | | flows while granites occurring as plutons, ring dykes, bosses and plugs form the second phase. The third...represented by mafic and felsic dykes. The terrestrial basalt-rhyolite/trachyte volcanism of Malani is.................... . Granitoids and gneisses .Dykes . .............................................................................. Peralkaline rhyolite . . ........................................................................ Peraluminous rhyolite . ............. ........ . ............. |  | Khashgerel, Bat-Erdene, Kavalieris, Imants, Hayashi, Ken-ichiro (2008) Mineralogy, textures, and whole-rock geochemistry of advanced argillic alteration: Hugo Dummett porphyry Cu–Au deposit, Oyu Tolgoi mineral district, Mongolia. Mineralium Deposita, 43 (8) 913-932 doi:10.1007/s00126-008-0205-3 | Journal (article/letter/editorial) | | composition. Host rocks are principally massive augite basalts (Late Devonian or older), and dacitic ash-flow...spatially related to small quartz monzodiorite dykes (meters to 50-m width) and intense quartz veining...mineralization is absent at the Hugo Dummett South deposit. Augite basalt and dacitic ash-flow tuff wall rocks and...quartz monzodiorite intrusions are emplaced in augite basalt and are not known to intrude the overlying...ash-flow tuff contact, small quartz monzodiorite dykes (meters thick) intruded parallel to the contact |  | | Journal (article/letter/editorial) | | lamprophyre, basalt, trachybasalt, phonolite and rhyolite dykes. The relationship of carbonatite magma to the...isotopic (C, 0, Sr and Nd) data for a series of dykes from the Igaliko Nepheline-Syenite Complex which...&I80 ratios show that the isotope evolution of the dykes is consistent with closely related carbonatite and...Greenland carbonatite dykes Complex and as a late plug associated setting as dykes within of the Gardar...basalt through trachyte to phonolite and rhyolite, in addition to dykes of lamprophyre and carbonatite (Emeleus |
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