 | | Journal (issue) | | OREGON GEOLOGY published by the Oregon Department of Geology and Mineral Industries . VOLUME 48, NUMBER...SEPTEMBER 1986 . \ LOCATION MAP 1 ""'GOH OREGON GEOLOGY (lSSN 0164-3304) VOLUME 48, NUMBER 9 ... SEPTEMBER 1986 Published monthly by the Oregon Department of Geology and MineraI Industries (Volumes...Supervisor Second class postage paid at Portland, Oregon. Subscription rates: 1 year $6; 3 years, $15. Single...subscription orders, renewals, and changes of address to Oregon Geology, 910 State Office Building, Portland, OR |  | | Report (issue) | | Hydrothermal Alteration Mineralogy in Newberry 2 Drill Core, Newberry Volcano, Oregon by Keith E. Bargar and Terry...iMenlo Park, CA INTRODUCTION Newberry Volcano, located in central Oregon about 40 km south of Bend, lies...western end of a volcanic terrain that extends across much of the southeastern part of Oregon, and becomes...the west (Macleod and others, 1976). The caldera of Newberry Volcano contains several hot-springs, fumaroles...1981; MacLeod and Sammel, 1982). Accordingly, Newberry 2, a 932 m deep drill hole was drilled by the |  | | Journal (issue) | | OREGON GEOLOGY published by the Oregon Department of Geology and Mineral Industries VOLUME 46, NUMBER...NUMBER 1 JANUARY 1984 OREGON GEOLOGY OIL AND GAS NEWS (ISSN 0164-3304) VOLUME 46, NUMBER 1 JANUARY...JANUARY 1984 Published monthly by the State of Oregon Department of Geology and Mineral Industries (Volumes...subscription orders, renewals, and changes of address to Oregon Geology, 1005 State Office Building, Portland,...information contained herein. Credit given to the Oregon Department of Geology and Mineral Industries for |  | | Journal (article/letter/editorial) | | Beltsville, Maryland 20705 Petrology of Newberry Volcano, Central Oregon Note: This paper is dedicated to Aaron...volcanoes that appears to be a subprovince of the Oregon high-alumina plateau basalt petrologic province...complex volcanic centers is Newberry Volcano in central Oregon, a shield volcano with a big caldera at its...stratigraphy of the caldera walls and of features on the caldera floor at Newberry allows detailed interpretation...younger parts of the volcano and caldera. The formation of Newberry Caldera was apparently a slow process |  | | Report (issue) | | hydrothermal minerals in the Cascade Mountains of northern Oregon by Keith E. Bargar and Robert L. Oscarson Open-File...area ........................................ .6 Newberry volcano ........................................from outcrops and geothermal drill holes in the Oregon Cascade Mountains ................... 24 4. Scanning...specimens and late Tertiary volcanic rock outcrop samples in three areas of the Oregon Cascade Mountains (near...Breitenbush-Austin Hot Springs area, and Newberry Volcano). The Neogene to Holocene volcanic rocks contain euhedral to |  | | Report (issue) | | Cenozoic tectonics of the Cascade arc, Washington, Oregon, and California Ray E. Wells..................... and regional tectonic setting of the Cascade volcanic province Richard J. Blakely and Robert C. Jachens...circulation in the Cascade Range, north-central Oregon Steve E. Ingebritsen, David R. Sherrod, and Robert...Robert H. Mariner.. 122 Heat flow in the Oregon Cascade Range and its correlation with regional gravity...Range in Oregon David R. Sherrod and LedaBeth G. Pickthorn..................... 351 Volcanic history |  | | Journal (article/letter/editorial) | | elsevier.com/locate/oregeorev The Southeast Missouri (USA) Proterozoic iron metallogenic province—Types of...University of Central Missouri, Warrensburg, MO 64093, USA ARC Centre of Excellence in Ore Deposits, University...2013 Keywords: Missouri (USA) iron district Proterozoic Magnetite Hematite IOCG-IOA a b s t r a c t...t The Southeast Missouri (USA) iron metallogenic province within the Mesoproterozoic St. Francois Mountains...of volcanic rocks. Iron oxides within all district deposits are dominantly magnetite and hematite, but |  | | Report (issue) | | .............................. .82 35. Bladed hematite deposits coating open spaces along with later...370 m) were collected for this investigation. Volcanic glass and open spaces of fractures, vesicles,...drill holes located both outside and within the caldera show the effects of hydrothermal alteration. The...(DonnellyNolan and others, 1990). The most recent volcanic activity (about 900 years ago), at Glass Mountain...Mountain, occurs in the vicinity of the 7 x 12 km caldera (Figure 2) (Donnelly-Nolan and others, 1990). Figure |  | | Journal (issue) | | State of Oregon Department of Geology and Mineral Industries 1069 State Office Bldg. Portland Oregon 97201...34,no.12 December 1972 OREGON "SUNSTONES" N. V. Peterson, Geologist Oregon Dept. of Geology and Mineral...Mineral Industries Introduction Within Oregon there is a small but unusual occurrence of semiprecious gems...locality is in the Rabbit Basin of southeastern lake County, and the "sunstones" occur as phenocrysts (large...of Portland, Oregon; Don Sellers of lakeview, Oregon; Truman Mitchell of Milwaukie, Oregon; and Mrs. T |  | | Journal (article/letter/editorial) | | predominantly andesitic volcanics forming and filling caldera structures (Lipman, 1975). The La Jara is predominantly...from the contact. The contact is also cut by fine hematite-filled fractures extending into adjacent tuff...m o n z o n i t e and and•site of the Platoro caldera. Weak correlations with Th hold (in all b u t...Formation is exposed in a quarry on the H o o d River, Oregon. Investigation of this contact showed that chemical...rhyodacite dike and basalt, quarry on Hood River, Oregon. The migration of radio- and trace elements into |  | | Journal (article/letter/editorial) | | middle of the Mexican Volcanic Belt (MVB), a vast Miocene-Recent, E-W–oriented volcanic province spanning...active geothermal field located in the Mexican Volcanic Belt (MVB), 200 km northwest of Mexico City. With...geothermal field is distinguished by extensive Neogene volcanic rocks, dominated by andesitic and basaltic lavas...rocks of Late Mesozoic to Oligocene age. The pre-volcanic basement consists of gently folded shales, sandstones...sandstones, and conglomerates. The oldest volcanic activity reported in this area began as andesite flows |  | | Report (issue) | | Reconnaissance geology of the Mount Edgecumbe volcanic field, Kruzof Island, southeastern Alaska, by...Concentric structure in elongate pillows, Amador County, Calif., by W. A. Duffield._______________________________...lapilli deposits from Central Pumice Cone, Newberry Caldera, Oreg., by M. W. Higgins______ Similarity...__________ Ultramafic xenoliths in basalt, Nye County, Nev., by N. J. Trask___-____-___________----_...Pink copper-bearing prehnite from Isle Royale National Park, Mich., by N. K. Huber_____________________________ |  | | Report (issue) | | Guides to some Volcanic Terranes in Washington, l~ho, Oregon, and Northern California David A. Johnston...tri p bet ween Lewiston , Idaho, and Kimberly , Oregon, emphasizing the Columbia River Basalt Group by...trip bet ween Lewiston , Idaho , and Kimberly , Oregon by D. A. Swanson , U. S . Geological Sur vey, Me...geologic field trip bet ween Kimberly and Bend, Oregon with emphasis on the John Day Formation by Paul...l. 2. 3. 4. 29 Index map of north - central Oregon with extent of John Day Formation ------------ |  | | Report (issue) | | Washington. Lower left: South Sister Volcano, Oregon, viewed from south. Devil’s Hill rhyodacite dome...the lava dome at Mount St. Helens, Washington, (USA), 1981-1983 ........ D. A. Swanson, D. Dzurisin...J. Casadevall, J. W. Ewert, and C. C. Heliker Volcanic activity at Santiaguito volcano, 1976-1984 oo...eruptions on the flanks of South Sister volcano, Oregon ......... William E. Scott Tephra deposits associated...structures in the 600-year-old lavas of the Inyo volcanic chain, eastern California ......... 0c ccc eee |  | | Report (issue) | | 3128,345 MiddlefieldRd. - RESTON, Virginia-National Center, Rm. 1C402,12201 Sunrise Valley Dr. SALT...Higgins (1973) for obsidians from the Newberry Volcano, Oregon, are consistently higher than those of...of Jack and Carmichael (1969) for the Newberry rocks. Jack and CarmichaePs (1969) Zn determinations, by...than those given by Laidley and McKay (1971) for Newberry glasses. In view of these difficulties with the...report compiles geochemical information on silicic volcanic glasses. The majority of analyses has been made |  | | Journal (article/letter/editorial) | | Wairakite Albite Sphene Epidote Actinolite Calcite Hematite Pyrite D l s t a n c ef r o m D l o r i t e I...regularly interstratified I/S (rectorite) with hematite and very small amounts of illite, chlorite, and...by fine-grained biotite, actinolite, chlorite, hematite, and pyrite. Thesesecondary minerals have crystallized...interferencecolors and negativeelongation.Although hematite is commonly found in the rocks of Zones II-Y,...Fe3+is accommodated preferentially in epidote and hematite, and as a result the Fe'z+/(Fe,*+ Mg) ratios of |  | | Report (volume) | | this alteration resulted in severely weakened volcanic edifices that were susceptible to failure and...and in the Osceola Mudflow, Washington altered volcanic rocks, one covering about 20 km2 on the north...(1986) as outflow facies rhyolite tuff related to a caldera located about 10 km to the southeast in the Clearwater...rocks have been interpreted as being related to a caldera (McCulla, 1986). Turn vehicles around and drive...original composition and primary textures of many volcanic rocks are not discernable. In the Superior and |  | Mosser-Ruck, Régine, Pignatelli, Isabella, Bourdelle, Franck, Abdelmoula, Mustapha, Barres, Odile, Guillaume, Damien, Charpentier, Delphine, Rousset, Davy, Cathelineau, Michel, Michau, Nicolas (2016) Contribution of long-term hydrothermal experiments for understanding the smectite-to-chlorite conversion in geological environments. Contributions to Mineralogy and Petrology, 171 (11) doi:10.1007/s00410-016-1307-z | Journal (article/letter/editorial) | | Gray, 25030 Besançon Cedex, France 7 Institut National de Recherche et de Sécurité (I.N.R.S), Avenue...in numerous environments: hydrothermal altered volcanic rocks (Krismannsdottir 1979; Alt et al. 1986;...with less than 15 % mixed layers, in the altered volcanic sequence of the Chipilapa geothermal system in...mineral. It is the MX80 Na, Ca-bentonite (Wyoming, USA), which is mostly composed of montmorillonite (79...%) and other minerals (pyrite, phosphates and hematite, 2 %), all presenting alteration traces (Guillaume |  | | Report (issue) | | Geological Survey (USGS). The USGS has three national programs in mineralrelated studies. The Development...This information is essential for formulating a national mineral policy and for identifying secure foreign...mineral resources in covered areas of Alaska. The National Mineral Resources Assessment Program (NAMRAP)...communities, and all those who are concerned with national mineral policy and land use decisions. These mineralresource...land. The result is an integrated approach to national mineral-resource problems. VI PROGRAM TUESDAY |  | | Book (volume) | | HALKA CHRONIC PAGES OF STONE GEOLOGY OF WESTERN NATIONAL PARKS & MONUMENTS 2: SERRA NEVADA, CASCADES,...Half Dome, Yosemite National Park. Inset: Jointed volcanic rock, Mount Rainier National Park. Manufactured...and Pacific Coast. 1. Geology—West (U.S.) 2. National parks and reserves—West (U.S.) 3. Natural monuments—West...Part 2. National Parks and Monuments Cabrillo National Monument Channel Islands National Park Crater...Crater Lake National Park Devils Postpile National Monument John Day Fossil Beds National Monument Lassen |  | | Journal (issue) | | Patterns in Opal Agate from Morocco Field Report on Oregon Sunstone Fall 2013 VOLUME 49, No. 3 EDITORIAL...Shows the conversion of limonitic residues to hematite in surface-reaching inclusions, a practical indication...pg. 162 FIELD REPORT 162 Three Occurrences of Oregon Sunstone Duncan Pay, Robert Weldon, Shane McClure...Chronicles a visit to the high desert of eastern Oregon to examine commercial sources of this natural copper-bearing...Mouawad Campus 5345 Armada Drive Carlsbad, CA 92008 USA © 2013 Gemological Institute of America All rights |  | | Report (issue) | | SIMS Potassium-Argon Ages from the Mount Taylor Volcanic Field, New Mexico By PETER W. LIPMAN and HARALD...Structurally Complex Rhyolite Center in Southeastern Oregon By RAY E. WELLS Palladium, Platinum, and Rhodium...(B) Potassium-Argon Ages from the Mount Taylor Volcanic Field, New Mexico, by Peter W. Lipman and Harald...Structurally Complex Rhyolite Center in Southeastern Oregon, by Ray E. Wells (F) Palladium, Platinum, and Rhodium...restricted to, the Vermilion the greenschist-facies volcanic and sedimentary rocks of the Vermilion district |  | | Book | | 75 CENOZOIC VOLCANISM IN THE NEWBERRY MOUNTAINS, SAN BERNARDINO COUNTY, CALIFORNIA . . . . . . . . .... • • • • • • • • • ♦ • ■ SAN DIEGO COUNTY, CALIFORNIA . . . . . . . . . . . . . . . . . ...transform system itself, local sedimentary basins and volcanic fields re l ated 3 to Neogene passage of the...oceanic hotspot tracks composed of seamounts and volcanic islands. Uncertainties about the timing of some...specifically from the potassium gradients in arc volcanic rocks (Keith, 1978). During latest Cretaceous |  | | Report (volume) | | Survey Bull. 1200; issued, Paris, 1967, by Centre National de Ia Recherche Scientifique as Volume 7 Amerique...74, Ph miles east of Dutchtown, Cape Girardeau County, Mo. Type section cut by northtrending fault with...stream in NEIA sec. 33, T. 16 N., R. 14 E, Wayne County. Named after village of Abington, about 3 miles...locality Achiote Conglomerate consists of massive red volcanic conglomerate with well-rounded clasts as large...Named for Adam Peak in Osgood Mountains, Humboldt County. Occupies belt about 21f2 miles long on western |  | | Book (volume) | | Ferromagnetism Ferrimagnetism Magnetite: Ulvospinel Series Hematite: Ilmenite Series Alteration Iron Oxyhydroxides...Southern Idaho Batholith Young Volcanic and Tectonic Provinces Oregon High Cascade Range—Washington Cascade...Cascade Range Basin and Range Province Oregon High Lava Plains Owyhee Upland Western Snake River Plain...Snake River Plain 13.7.15. Island Park—Yellowstone National Park 13.3: _ 13:9. xiii 13.7.16. Origins...reliable form. CINDAS is one component of the National Standard Reference Data System (NSRDS), which |
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