 | Cadoux, Anita, Pinti, Daniele L., Aznar, Cyril, Chiesa, Sergio, Gillot, Pierre-Yves (2005) New chronological and geochemical constraints on the genesis and geological evolution of Ponza and Palmarola Volcanic Islands (Tyrrhenian Sea, Italy) Lithos, 81 (1) 121-151 doi:10.1016/j.lithos.2004.09.020 | Journal (article/letter/editorial) | | and Palmarola Volcanic Islands (Tyrrhenian Sea, Italy) Anita Cadouxa,*, Daniele L. Pintia,1, Cyril Aznara...Dalmine Via Pasubio 3/5, 24044 Dalmine (Bergamo), Italy Received 12 August 2003; accepted 27 September 2004...including the Tuscan Magmatic Province (TMP) and the Roman Co-Magmatic Province (RCMP) (e.g., Savelli, 2000)...and Dolfi, 2002), whereas the Quaternary trachytic dome exposed in the southern part of Ponza has been considered... 1998). The products are high-K calc-alkaline rhyolite lavas issued from submarine vents (Carmassi et |  | | Report (issue) | | north to high hills of rhyolite and rhyolite breccia of the Thlewycho east lava dome. Photograph by M.B....White-weathering rhyolite derived turbidite beds on northern end of the Gold Lake lava dome, west side of...distribution Lithology Andesite and basalt Dacite Rhyolite Volcaniclastic and iron-rich sedimentary rocks...Flow units Andesite lavas Dacitic lavas and tuffs Rhyolite lavas, domes, and intrusions Volcaniclastic rocks...lavas Rhyolite turbidite Interpretation Carbonate units Stromatolites Stromatolites in felsic dome breccia |  | | Journal (article/letter/editorial) | | di Scienze Geologiche, UniversitĆ di Roma TRE, Italy. Department of Earth Sciences, PO Box 28E, Monash...deposits are present, the latter being interpreted as dome-top tuff cone deposits (Cas et al. 1990). The Boyd...characterised by bimodal volcanism, such as the Mt Howitt Province of Figure 2 Detailed geological and structural...detailed work on the Mansfield Basin of the Mt Howitt Province (OāHalloran & Cas 1995) revealed that compressional...Figure 3 Tension-gashes filled with quartz developed in a rhyolite cryptodome body as a response to the |  | | Journal (article/letter/editorial) | | Goldfield-Superstition volcanic province, Central Arizona, USA: Geochemically distinct rhyolite sources, 20.5 to 19...GoldfieldSuperstition volcanic province, Central Arizona, USA: Geochemically distinct rhyolite sources, 20.5 to 19...Goldfield-Superstition volcanic province, central Arizona, USA: geochemically distinct rhyolite sources, 20.5 to 19...Abstract The Miocene Goldfield-Superstition volcanic province (G-SVP) in central Arizona is composed of silicic...bulk of IP this large province from ~19 to 18.5 Ma (~8000 km2 ). CR Rhyolite compositions dominate |  | Brathwaite, R. L., Christie, A. B., Faure, K., Townsend, M. G., Terlesk, S. (2012) Origin of the Matauri Bay halloysite deposit, Northland, New Zealand. Mineralium Deposita, 47 (8) 897-910 doi:10.1007/s00126-012-0404-9 | Journal (article/letter/editorial) | | hosted by a sanidine rhyolite dome (ArāAr dated at 10.1 Ā± 0.03 Ma). The rhyolite dome intrudes an older...Primary sanidine and plagioclase phenocrysts in rhyolite are completely leached out in the halloysite-rich...plagioclase phenocrysts and groundmass glass in the rhyolite, resulting in loss of K, Ca, Na and Si and enrichment...10%) and Al2O3 (20ā30%) relative to least-altered rhyolite with 1.8% LOI and 14.5% Al2O3. Oxygen and hydrogen...Zealand Keywords Halloysite . MioceneāPliocene rhyolite and basalt . Supergene . Subtropical weathering |  | | Report (issue) | | and Petrogenesis of the Island Park Caldera of Rhyolite and Basalt Eastern Idaho GEOLOGICAL SURVEY PROFESSIONAL...and Petrogenesis of the Island Park Caldera of Rhyolite and Basalt Eastern Idaho By WARREN HAMILTON SHORTER...collapse of a large magma chamber in which liquid rhyolite overlay liquid basalt UNITED STATES GOVERNMENT...The caldera____________________________________ Rhyolite of precaldera shield volcano__________ Caldera...---------------------Rhyolite domes on caldera rim_______________ Postcollapse rhyolite ash flows________________ |  | JACKSON, N, DOUCH, C, WALSH, J, BEDAWI, H, ALHASMI, H (1982) Granitic plutonism and mineralisation in the Central Hijaz between 23ā25Ā°N, 37ā40Ā°E. Precambrian Research, 16 (4) doi:10.1016/0301-9268(82)90104-8 | Journal (article/letter/editorial) | | The volcanics contain several sets of subvertical quartz veins including the orebodies. The ore minerals...which occur in veins and quartz stockworks associated with a small rhyolite dome: a detailed map of the...the area around the rhyolite dome ('Mine Hill') is presented. The controls on mineralisation appear to bei...coarse tuff horizon; and (c) closeness to the rhyolite. GRANITIC PLUTON!SM AND MINERALISATION HIJAZ...monzogranites are known to host Mo-, Bi-, Pb-, Ag-bearing quartz vein systems. Evolution of granitic magmatism appears |  | | Report (chapter) | | basin-and-range provinces (e.g. the Basin-and-Range Province of the western U S A and northern Mexico (Scholz...to rhyolitic volcanism is the Basin-and-Range Province in the western USA and in northern Mexico (Scholz...1987; Harry et al. 1993). The Basin-and-Range Province, however, is not related to a late-orogenic tectonic...restricted to three probably also Lower Permian rhyolite dykes (Dreyer et al. 1983), their potential surface...ignimbrite vent, 1 km in diameter, with an intrusive rhyolite plug (Minning & Lorenz 1983; Negendank 1983) which |  | | Report (issue) | | ........................................15 Rhyolite Dome................................................................................17 Oligocene Rhyolite Domes...........................................analyses of the tuff of Hall Creek and related rhyolite domes, compared to data from intracaldera Caetano...for analyses of the tuff of Hall Creek, related rhyolite domes, and outflow Caetano Tuff analyzed in this...tuff of Hall Creek, a moderately crystal-rich rhyolite (71ā77 percent SiO2) ash-flow tuff. Caldera collapse |  | Gioncada, Anna, Orlandi, Paolo, Vezzoli, Luigina, Omarini, Ricardo H., Mazzuoli, Roberto, Lopez-Azarevich, Vanina, Sureda, Ricardo, Azarevich, Miguel, Acocella, Valerio, Ruch, Joel (2014) Topaz magmatic crystallization in rhyolites of the Central Andes (Chivinar volcanic complex, NW Argentina): Constraints from texture, mineralogy and rock chemistry. Lithos, 184. 62-73 doi:10.1016/j.lithos.2013.10.023 | Journal (article/letter/editorial) | | Pisa, Italy Dipartimento di Scienza e Alta Tecnologia, UniversitĆ dell'Insubria, Como, Italy c Facultad...Dipartimento di Scienze, UniversitĆ Roma Tre, Roma, Italy b a r t i c l e i n f o Article history: Received...online 30 October 2013 Keywords: Topaz-bearing rhyolite Fluorine Magmatic volatiles Miarolitic texture...texture Central Andes a b s t r a c t Topaz-bearing rhyolite lavas were erupted as domes and cryptodomes during...volcano, in Central Andes. These are the only topaz rhyolite lavas recognized in Central Andes. Textural, mineralogical |  | | Report (issue) | | ..................................... Resurgent Dome and Central Graben ............................................................................ Rhyolite Dikes .................................................... Rhyolite and Basalt Flows and Intrusions ............................ Rhyolite Dikes .................................................... Rhyolite Ring-Domes and Flows ...........................Near-Vent Intracaldera Ash-Flow Tuff with a Banded Rhyolite Block ....................................... |  | | Journal (article/letter/editorial) | | Three locations in the Trans-Pecos Magrnatic Province, Texas, U.S.A., demonstrate this hydrothermal...intrusions, a series of mildly peraluminous, F-rich rhyolite laccoliths, contain as much as 1000 ppm Zr, mostly...concentrations in fluorspar are ~ 200 ppm. Metaluminous quartz monzonite from the Infiernito caldera contains...mostly as zircon. Euhedral zircon in quartz-fluorite veins in the quartz monzonite indicates mobility of Zr...therefore mobility of Zr. 2. Trans-Pecos Magmatic Province, Texas Magmatism in Trans-Pecos Texas occurred |  | | Report (issue) | | by eruption of the caldera-forming low-silica rhyolite Confidence Peak Tuff. The intracaldera Confidence...it has been intruded by younger plutons of the quartz monzodiorite porphyry suite. Large blocks (up...sequence in the western Silver Bell Mountains. Quartz monzodiorite to granodiorite porphyry plutons were...65 Ma related to emplacement of plutons of the quartz monzodiorite porphyry suite. The final late Cretaceous...in the Silver Bell Mountains was small-volume rhyolite and dacite volcanism deposited above the Cat Mountain |  | Klein, T. L., Cunningham, C. G., Logan, M.A.V., Seal, R. R. (2007) The Russell Gold Deposit, Carolina Slate Belt, North Carolina. Economic Geology, 102 (2) 239-256 doi:10.2113/gsecongeo.102.2.239 | Journal (article/letter/editorial) | | Formation. Recent mapping has shown that a rhyolitic dome near the Russell mine was extruded during the deposition...the ore zones suggest contemporaneous bimodal (rhyolite-basalt) volcanism. The maximum formation age of...in and near pyritic ore (3.5ā4.5ā°), in the rhyolite dome (5.1ā5.4ā°) and in the Tillery Formation (5.9ā6...pyrite veins and disseminations in the nearby rhyolite dome, suggesting a possible genetic link between...from the Russell deposit, including a nearby rhyolite dome, and compare the Russell deposit with others |  | | Journal (article/letter/editorial) | | massive rhyolites occur as dome or domelike stubby lava flows. These rhyolite domes vertically and laterally...form hyaloclastic blankets. In and around these rhyolite domes, we have defined six different volcanic...of: (1) massive rhyolite; (2) massive perlite; (3) hyaloclastic breccias; (4) rhyolite pumice and lithic...ignimbrites; and (6) brecciated perlite. The massive rhyolite facies have distinct structures from the centers...complex, which is predominantly composed of massive rhyolite and felsic volcaniclastic rocks. In the uppermost |  | | Journal (article/letter/editorial) | | Alteration was mapped around a partly fragmental rhyolite dome, enclosedin mafic flows. Sodic regional alteration...conicalbrecciapipes within the rhyolite dome, which terminate at a pyroclasticrhyolite-rhyolite breccia contact.Cu-Zn...approximate upward stratigraphic ments away from the dome suggest that this sequenceby the Godden, Caldwell...massiveand are up to 60 m mation, a monomictic rhyolite breecia composed thick. Northeasterly trending...trending diorite dikes (Fig. of 85 percent angular rhyolite clastsin an aphan- 2) are gradational in places |  | Peterson, Tony D., Scott, Jeffrey M.J., LeCheminant, Anthony N., Jefferson, Charles W., Pehrsson, Sally J. (2015) The Kivalliq Igneous Suite: Anorogenic bimodal magmatism at 1.75Ga in the western Churchill Province, Canada. Precambrian Research, 262. 101-119 doi:10.1016/j.precamres.2015.02.019 | Journal (article/letter/editorial) | | magmatism at 1.75 Ga in the western Churchill Province, Canada Tony D. Peterson a,ā , Jeffrey M.J. Scott...granite Maļ¬c dyke swarm Proterozoic Nuna Churchill Province a b s t r a c t The Kivalliq Igneous Suite (1...intrusions; three swarms of maļ¬c dykes; and basalt, rhyolite and pyroclastic rocks of the Pitz Formation (Wharton...trans-Hudson orogen, in the central western Churchill Province (WCP) of the Canadian Shield. The Nueltin granites...the suite comprises a classic bimodal anorogenic province. Kivalliq rhyolites/granites were erupted/emplaced |  | | Journal (article/letter/editorial) | | nested caldera and intrusion of a ring-fault rhyolite dome and intracaldera dikes at 31.8 Ma. These ages...and Au veins 31.76 0.44 Ma X Mineralni Bani dome Mineralni Bani 32.30 0.24 Ma Sarnitsa monzonite...Borovitsa ring dikes Caldera-bounding faults Murga ring dome Silicic tuffs and lavas aca Borovitsa Volcanic...Neogene - Quaternary sediment or B sa Quartz trachyte & rhyolite dikes Advanced argillic alteration &...fov et al., 1990; Yanev and Pe to high silica rhyolite, including lava flows, pyroclastic rocks, stocks |  | | Journal (article/letter/editorial) | | Springer-Verlag 1978 Volcanogenic Mineralization and a Rhyolite Dome in the Arabian Shield J. McMahon Moore Imperiar...volcanic rocks, ranging in composition from basalt to rhyolite. The mineral~ ization occurs in veins and as strata-bound...alteration of adjacent rocks. An intrusive rhyolite dome or laceolith is situated at the centre of an...volcanogenic mineralization, based on a concept of the dome acting as a heat source to drive a geothermal "cell"...volcanics and sediments which mantle the sub-volcanic, rhyolite intrusion. The ore genetic model implies that |  | | Report (issue) | | ___________ 8 Potassium-argon ages Continued Rhyolite domes______________________ _ D8 Altered basaltic...area lies approximately on a line connecting four rhyolite domes, the largest of which is 3 km southwest...from which the rhyolite domes were emplaced. Sanidine and obsidian from four of the rhyolite domes yielded...Steamboat Springs (Pliocene) Rhyolite Includes Steamboat Hills Rhyolite (Pleistocene and late Pliocene...Pliocene?) and Washington Hill Rhyolite (Pliocene) 39Ā°15' 120 00' Volcanic rocks,, mostly intermediate 15 |  | | Journal (article/letter/editorial) | | mixing from the hybrid M rocks of the Ghansura Rhyolite Dome (GRD) of Proterozoic Chotanagpur Granite Gneiss...setting and field relations ED The GRD is a small rhyolite domain occurring in the Bathani volcano-sedimentary...phyllitic tuff, mafic pyroclastic rock, tuff, rhyolite, chert and AC banded iron formation (Fig. 1)...mafic pyroclasts b) acid volcanics comprising rhyolite c) volcano-sedimentary sequence comprising tuff...observations suggest that basaltic magma intruded the rhyolite magma chamber when it was partly solidified and |  | | Report (issue) | | of analyzed samples Map showing distribution of dome and caldera complexes Variations in K20-Na20 and...represented within and marginal to the Basin and Range Province. Within the northern Basin and Range, deposits...and Pliocene age rocks dominated by basalt and rhyolite or rhyodacite (Gay and Aune, 1958; Jennings, 1977;...Included in the study are data on rhyolite, rhyodacite, dacite, and quartz latite collected in southeast...toward analytical data from silicic rocks of isolated dome complexes, as well as clearly identified intrusions |  | | Report (issue) | | Rocks tentatively identified as Caballo Blanco Rhyolite and Davis Canyon Tuffs are in contact with underlying...Gila Hot Springs graben (3) The Alum Mountain rhyolite dome and eruptive center (4) A proposed segment of...Dwellings National Monument. The Alum Mountain rhyolite dome and eruptive center in the southwestern part...Transverse Mercator, zone 12 The Alum Mountain rhyolite dome and Gila River canyon as viewed from the Alum...eruptive center is a dome of pervasively altered and weakly mineralized rhyolite, partially encircled |  | | Report (issue) | | these two provinces. In contrast, the eastern province is characterized by plutons that are not strongly...mineralization lies within the central isotopic province and is generally parallel to both the Carlin trend...between Archean and Proterozoic crust in the eastern province is not defined clearly and probably represents...suite of granitoid rocks from the Basin and Range Province, Arizona, California, Nevada, and Utah: U. S....suite of granitoid rocks from the Basin and Range Province: U. S. Geological Survey Bulletin 1602, 54 P-(13) |  | | Journal (article/letter/editorial) | | massivesulfidebodiesare on the flankof a black rhyolite dome and are assortedwith Mg-rich rocksincludingtalc...The orebodiesare strata-bound within dome-derivedoligomictic rhyolite breccias,which are in turn envelopedby...5 I A- O a0. Basalt B - Trachyte + 25 C- Rhyolite o D- ā¢ _ Phonolite E - Dacite 2o F - Andesire...mation. itc, trachyte, and latite to rhyodaciteand rhyolite, Primary volcanicfeaturesare well preservedin...subaerial canic intrusivedomesof rhyodaciteand rhyolite. ash flows.The interpretationis that the dominant |
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