 | | Journal (article/letter/editorial) | | OF NEW ENGLAND By ROBERT GREENWOOD ABSTRACT In north-central Nigeria a group of rocks of alkalic affinities...close to the surface. Many bodies of intrusive rhyolite occupy crescentic fractures, and granite porphyry...post-tectonic phase. CONTENTS TEXT Page Page Rhyolite dikes 1163 Introduction 1152 Contact metamorphism...1166 Hornblende micro-gabbro dikes 1157 Other areas in Nigeria 1168 Rhyolite sheets 1157 Northern Plateau...1161 Alkalic Rocks of New England 1171 Dolerite dikes 1162 Introduction 1171 1151 1152 ROBERT GREENWOODâYOUNGER |  | | Report (volume) | | and Coyote Mountains Wilderness Study Areas, Pima County, Arizona ARIZONA Chapter E Mineral Resources...Coyote Mountains Wilderness Study Areas, · Pima County, Arizona By GARY A. NOWLAN, GORDON B. HAXEL, ....and Coyote Mountains Wilderness Study Areas, Pima County, Arizona I by Gary A. Nowlan ... [et al.]. p. em...Mountains (AZ-020-202) Wilderness Study Areas, Pima County, Arizona. CONTENTS Summary El Abstract El Character...and Coyote Mountains Wilderness Study Areas, Pima County, Arizona E2 Map showing mineral resource potential |  | | Journal (article/letter/editorial) | | of felsic relative to mafic volcanicrocks from north to southis accompanied by increasing proportionsof...southernsequencesare consistently more radiogenicthan thoseto the north, and they interpretall thesefeaturesasreflectingan...couldbe determinedin this study,and none cleavage,north-northwest-trending blockor strike- is impliedby...Deformed felsicvolcanic rocks, mostly pyroclostic Rhyolite Boy Du Nord Group-semi-pelitic schist âą felsic...equigranularwith rapikivi phasesand ChetwyndGranite rhyolite dikes Intrusive contact Unnamed granite Porphyriticgranite |  | | Journal (article/letter/editorial) | | (Gandhi et al. 2001) and Great Bear batholith to the North (Hildebrand et al. 2010). Collectively, these observations...a depth of 300 m along the moderate to steeply north-northeast-dipping stratification of thick-bedded...chalcopyrite, hematite, quartz, chloropotassic hastingsite, chlorite, emplectite (CuBiS2) and wittichenite... but also altered some porphyritic rhyolite dikes, granite dikes and intrusions. Bedding of the host...metasiltstone is generally steeply dipping to the north-northeast. At a regional scale, the orientation |  | | Report (issue) | | andesite __________ ~ ____________ ~ ____ _ 27 Banded rhyolite ________________ ___________ _ 27 Red andesite...Tertiary (?) effusive igneous rocks-Continued. Red rhyolite _____________________________ - _ Upper andesite...andesite __________ ~ _______ __________ _ Pink rhyolite ____________________ __________ _ White felsite tuff...Latite porphyry ___________________________ _ Latite dikes _______ ~ _______________ - _- _--- _Rhyolite porphyry...Lithology __________________ ____________ _ Aplite dikes ________________ ----- ---:..------Pegmatitic materiaL |  | | Journal (article/letter/editorial) | | central Great Basin, USA David R. Boden 1445 High Chaparral Dr., Reno, NV 89511, USA Received May 10, 1992...was erupted from the complex. The high-silica rhyolite tuff of Moores Creek is the least strongly zoned...high-silica rhyolite to ~800 840~ for dacite), and water-rich (5.0-5.5 wt% H 2 0 for highsilica rhyolite to ~4...at 37 34 Ma. The dikes are broadly bimodal assemblage of silicic andesite and rhyolite. Voluminous ash-flow-tuff...Basin and Range province, a region characterized by north-trending ranges and 10- to 20-kinwide alluviated |  | | Report (volume) | | Mountains of Wyoming. It extends southeast 115 mi from north of Sundance, Wyo., to south of Hot Springs, S. Dak...Springs, to 7,242 ft at the top of Harney Peak, north of Custer. The rocks in the Forest range from those...Custer. The search for more gold led prospectors north from Custer to find other placer deposits in the...Irregularly shaped, it extends for 115 mi from north to south, averaging about 25-30 mi in width in South...Carbide Corp., 1979, 1980; Goff and others, 1980; Warren and others, 1980). More detailed surveys of smaller |  | | Report (issue) | | Proterozoic tectonic evolution of the Grenville orogen in North America Edited by Richard P. Tollo Department of...George Washington University Washington, D.C. 20052 USA Louise Corriveau Geological Survey of Canada GSC-QuĂ©bec...Skidmore College Saratoga Springs, New York 12866 USA Mervin J. Bartholomew Department of Earth Sciences...Tennessee 38152 USA Memoir 197 3300 Penrose Place, P.O. Box 9140 â Boulder, Colorado 80301-9140, USA 2004 MWR197...Place, P.O. Box 9140, Boulder, Colorado 80301-9140, USA. Copyright is not claimed on any material prepared |  | | Report (issue) | | Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, product...Loch Ken in Galloway (1786) and on Goatfell in the north of Arran (1787), because he concluded, that if his...More recently, magma transfer through the crust in dikes has become popular. Rates of melt segregation in...applied differential stress and melt ascent in dikes or major shear zones have been modeled, and in some...emplacement. The importance of mass transfer in dikes was recognized by Hutton during field work at Water |  | | Book | | for example, are almost entirely derived from the USA and Tur- key, a situation too narrowly based comfort... The takeover of soda-ash markets, at least in North America, by the mineral trona is another marked...Geology of Industrial Minerals, held annually in North America, provide much geological and related information...Minerals International Congress took place in Boston, USA, in April 1988. 4| a) envi at wererieryre' humus...rocks, including ophiolites (chrysotile of eastern North America and Califor- Determination of tensile strength |  | | Report (issue) | | Eastern North American Mesozoic Magmatism iS) Edited by John H. Puffer and Paul C. Ragland * » Eastern... Eastern North American Mesozoic Magmatism Edited by John H. Puffer Geology Department Rutgers University...Congress Cataloging-in-Publication Data Eastern North America Mesozoic magmatism / edited by John H. Puffer...Sequence and Tectonic Significance of Mesozoic Dikes in Southern Coastal Maine . Mark T. Swanson 37...Petrology and Tectonic Significance of Mesozoic Mafic Dikes of the Coastal New England Igneous Province, Massachusetts |  | | Journal (article/letter/editorial) | | among the Tertiary to Recent igneous centres of the North Atlantic (e.g. Walker and Skelhorn 1966; Gamble...chemical) of representative syenites granites and rhyolite 1 2 3 4 5 6 7 SiO2 TiO2 AlzO3 FezO3 FeO...(specimen 7539) Norm includes corundum 0.323 7. Rhyolite. Adjacent Bjorn syenite (specimen 7716) b Hd...conspicuous among which is flow banded, devitrified, rhyolite which Fig. 7a, b. Plot of A1T+Ca v Si+ Na + K...amphibo!es in a syenites and b hybrids. Ha = hastingsite; Hb = hornblende; Ed= edenite; Act = actinolite/barroisite; |  | | Report (issue) | | COVER PHOTO : Gold nugget from Dukes Creek, White County, weight 5 oz., 12 dwt., approx. 2x. BACK COVER...approx. 1.5x. Lower left - Goethite from Pulaski County, approx. lx. Right - Magnetite crystal face showing.......................................... 130 Hastingsite ......................................................................................... 170 County Index ...........................................from Washington and Bleck ley counties to Irwin county. Some minerals described herein have never been |  | | Book | | km 2) stretching from the A rctic Ocean in the north to the Russia/C hina/K orea boundary in the south...location at the junction o f the Eurasian and the North Am erican continental and the P acific Ocean oceanic...central structural unit in the territory is the North A sian Craton represented by eastern parts o f the...zo ic passive continental margin approached the North A sian Craton. The Koryak H ighlands terrane o f...terrans are located south and southeast o f the North A sian Craton. A vast area o f the C enozoic c o |  | | Book | | William Folley and Ms. Valerie Chasen. ledge Dean Warren Ilchman, College of Liberal Arts, Boston University...COASTAL GEOLOGY: BEDROCK GEOLOGY NORTH, WEST, & SOUTH OF BOSTON: NORTH OF BOSTON: 10 Trip No. Page...Paleozoic volcanics and intrusives (Fig, 1), To the north and west is the northeast-southwest trending Clinton-Newbury...Nantucket Island dominate the surface geology (Fig. 1). North of Cape Cod the glacially derived sedimentary coast...often interrupted by bare, jagged rocks, especially north of Boston, Despite the location here of an unusual |  | | Report (volume) | | States and its possessions. The first compilation, "North American Geologic Formation Names," Bulletin 191...contains: (1) an alphabetical listing of 1,500 North American sedimentary formation names and 100 names...year 1955), Bulletin 1056-A, "Geologic Names of North America Introduced in 1936-1955," by Druid Wilson...listed about 5,000 new names introduced for use in North America, the Pacific Island possessions of the United...nonalphabetical "Index to the Geologic Names of North America," Bulletin 1056-B, by Druid Wilson, Grace |  | | Book | | .............. . Calcite-Fluorite-Apatite Vein-Dikes ................................... . Radioactive.... . .. . .. . ......... .. ...... . . . South Carolina .......... . ....... . ........ . .............. ......................... . ............... . North Africa . . . . . . . . ... .. ... . ....... ....... . ......... ... .. . .. .. . . . . . . Other North American Deposits . .. ...... . .... . .. . . ....5.47 A; fron1 pegn1atite, granite, and syenite dikes; associated minerals are potash and soda feldspars |  | | Book | | Schuh, Richard A. Leveille, Isabel Fay, and Robert North 269 Stephen E. Box, Boris Syusyura, Reimar Seltmann...VirgĂnia Soares Monteiro, Systems of the CarajĂĄs Carolina Penteado N. Moreto, AndrĂ© Luiz Silva Pestilho...Copper Systems of the Chilean Andes The Southwestern North America Porphyry Copper Province Tectonomagmatic...Subduction and porphyry copper deposits in southwestern North America â a reply to recent objections: Economic...H., 2008, Major gold deposits and belts in the North and South American Cordillera: Distribution, tectonomagmatic |  | | Journal (article/letter/editorial) | | deposits by Tissot and Welte (1978), Hunt (1979), North (1985), Selley (1997) and Gluyas and Swarbrick (2004)...Halloysite Halotrichite Hambergite Hanksite Hastingsite Hausmannite Hauyne Hawleyite Heazlewoodite Hectorite...classiïŹcation of magmatic rocks into plutonic, subvolcanic, dikes and extrusive/effusive rocks and their wide range...ultrapotassic igneous rocks primarily occurring as dikes and small intrusions. They are alkaline silica-undersaturated...intermediate in composition between dacite and rhyolite (phenocrysts of Na plagioclase, Câ(D) sanidine | | | Journal (article/letter/editorial) | | deposits by Tissot and Welte (1978), Hunt (1979), North (1985), Selley (1997) and Gluyas and Swarbrick (2004)...Halloysite Halotrichite Hambergite Hanksite Hastingsite Hausmannite Hauyne Hawleyite Heazlewoodite Hectorite...classiïŹcation of magmatic rocks into plutonic, subvolcanic, dikes and extrusive/effusive rocks and their wide range...ultrapotassic igneous rocks primarily occurring as dikes and small intrusions. They are alkaline silica-undersaturated...intermediate in composition between dacite and rhyolite (phenocrysts of Na plagioclase, Câ(D) sanidine |  | | Book (edition) | | G. F. Kunz (1890) Gems and precious stones of North America. A. H. Verrill (1939) Minerals, metals,...prospecting for uranium on La Ventana Mesa, Sandoval County, New Mexico. .,3d ed. H. C. Dake (1953) The uranium...and the counare arranged alphabetically; within a county the districts are also given in alphabetical order...camps, and synonyms, together with the name of the county in which the district is located. In perusing the...certain highlights in the history of mineralogy in North America, the reader is referred to W. E. Ford (1918) |  | | Book (edition) | | many exploration geologists as there are in all of North America. The organization of the first two editions...of Wilderness and Primitive areas are limiting USA 50 2 Est. United Kingdom ~ 0 .., 100 C 0...Situation Chile El Tatio Quaternary and Tertiary rhyolite, andesite; Mesozoic sediments Total Generating...(2600) 300 (370) s Quaternary rhyolite, andesite Quaternary rhyolite, andesite Quaternary rhyol ite...185 (200) S +W 3 Quaternary andesite, dacite, rhyolite 250 (400) (800) 75 100 10.5 920 (2300) |  | Nokleberg, Warren J., Bundtzen, Thomas K., Dawson, Kenneth M., Eremin, Roman A., Goryachev, Nikolai A., Koch, Richard D., Ratkin, Vladimir V., Rozenblum, Ilya S., Shpikerman, Vladimir I., Frolov, Yuri F., Gorodinsky, Mary E., Melnikov, Vladimir D., Ognyanov, Nikolai V., Petrachenko, Eugene D., Pozdeev, Anany I., Ross, Katherina V., Wood, Douglas H., Grybeck, Donald, Khanchuk, Alexander I., Kovbas, Lidiya I., Nekrasov, Ivan Ya., Sidorov, Anatoly A. (1996) Significant metalliferous and selected non-metalliferous lode deposits and placer districts for the Russian Far East, Alaska, and the Canadian Cordillera. Open-File Report Vol. 1996 (96-513) US Geological Survey doi:10.3133/ofr96513a | Report (issue) | | Far East, Alaska, and the Canadian Cordillera, by Warren J. Nokleberg, Thomas K. Bundtzen, Kenneth M. Dawson...FAR EAST, ALASKA, AND THE CANADIAN CORDILLERA By Warren J. Nokleberg1, Thomas K. Bundtzen2, Kenneth M....Geological Survey editorial standards or with the North American Stratigraphic Code. Any use of trade, firm...FAR EAST, ALASKA, AND THE CANADIAN CORDILLERA By Warren J. Nokleberg 1 , Thomas K. Bundtzen2, Kenneth M...tectonostratigraphic terrane map of the Circum-North Pacific (Nokleberg and others. 1994c). A companion |  | | Report (issue) | | 31 University of Nevada Press, Reno, Nevada 89557 USA Copyright © 2004 by University of Nevada Press Photographs... Majuba Hill Mine, Antelope district, Pershing County. N. Prenn collection. Photograph by J. Scovil....Goodsprings (Yellow Pine) Mining District, Clark County John C. Kepper 91 References 467 Contributors...Humboldt County and the crystalline quartz collecting area on Petersen Mountain in Washoe County, permission...Igneous intrusions that are series of generally north-trending mountain about 1.4 billion years old |  | | Report (volume) | | Boston Massachusetts 02108, USA 667 Lytton Avenue, Palo Alto California 94301, USA 107 Barry Street, Carlton...Carlton Victoria 3053, Australia DISTRIBUTORS USA and Canada Blackwell Scientific Publications Inc PO Box...directly to CCC, 27 Congress Street, Salem, MA 01970, USA. 0305-8719/87 $02.00 British Library Cataloguing...White Mountain alkaline igneous provinces, eastern North America 433 vi Contents UPTON, B. G. J. & EMELEUS...example, biotites from the Poohbah Lake syenite in north-western Ontario have been dated at around 2.7 Ga |
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