A More Informative Way to Name Plutonic Rocks a More Informative Way to Name Plutonic Rocks
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Minor Elements in Magnetic Concentrates from the Syenite-Shonkinite Province, Southern Asir, Kingdom of Saudi Arabia
DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY Minor elements in Magnetic concentrates from the Syenite-Shonkinite Province, Southern Asir, Kingdom of Saudi Arabia I/ I/ I/ I/ W. C. Overstreet, G. W. Day, Theodore Botinelly, and George Van Trump, Jr. Open-File Report 87 r Report prepared by the U.S. Geological Survey in cooperation with the Deputy Ministry for Mineral Resources, Saudi Arabia This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature, I/ USGS, Retired 2/ USGS, Denver, CO 1987 CONTENTS ABSTRACT............................................................ 1 ACKNOWLEDGMENT...................................................... 1 INTRODUCTION........................................................ 1 Areas covered and previous work................................ 1 Syenite plutons........................................... 3 Jabal Fayfa and Jabal Bani Malik..................... 3 Pluton southeast of Suq al Ithnayn................... 3 Shonkinite pluton at Jabal Atwid..................... 3 Mineral potential......................................... 3 Purpose of present investigation............................... 3 PROCEDURES.......................................................... 10 Collection and preparation of detrital magnetite............... 10 Mineralogical analyses......................................... 10 Semiquantitative spectrographic analyses....................... 11 Method................................................... -
Feldspar and Nepheline Syenite 2016
2016 Minerals Yearbook FELDSPAR AND NEPHELINE SYENITE [ADVANCE RELEASE] U.S. Department of the Interior January 2020 U.S. Geological Survey Feldspar and Nepheline Syenite By Arnold O. Tanner Domestic survey data and tables were prepared by Raymond I. Eldridge III, statistical assistant. In 2016, feldspar production in the United States was representing 46% of the 2016 production tonnages listed in estimated to be 470,000 metric tons (t) valued at $33.1 million, tables 1 and 2. an almost 10% decrease in quantity and a 11% decrease in Feldspar was mined in six States (table 3). North Carolina value compared with 2015 (table 1). Exports of feldspar in 2016 was by far the leading producer State; the remaining five were, decreased by 61% to 5,890 t, valued at $1.5 million, and imports in descending order of estimated output, Virginia, California, of feldspar decreased by 69% to 36,900 t, valued at $3.4 million. Idaho, Oklahoma, and South Dakota. Production was from Imports of nepheline syenite (predominantly from Canada) 10 mines and beneficiating facilities—4 in North Carolina, 2 in increased by 27% to about 572,000 t valued at $73 million. California, and 1 in each of the 4 remaining States (table 3). World production of feldspar in 2016 was 23.4 million metric I-Minerals Inc. continued the mine permitting process for tons (Mt) (tables 1, 7). its Helmer-Bovill project in north-central Idaho; the mine Feldspars, which constitute about 60% of the earth’s crust, would produce potassium feldspar, halloysite, kaolin, and are anhydrous aluminosilicate minerals of two main groupings: quartz. -
Some Geologic and Exploration Characteristics of Porphyry Copper Deposits in a Volcanic Environment, Sonora, Mexico
Some geologic and exploration characteristics of porphyry copper deposits in a volcanic environment, Sonora, Mexico Item Type text; Thesis-Reproduction (electronic); maps Authors Solano Rico, Baltazar, 1946- Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 30/09/2021 03:12:43 Link to Item http://hdl.handle.net/10150/566651 SOME GEOLOGIC AND EXPLORATION CHARACTERISTICS OF PORPHYRY COPPER DEPOSITS IN A VOLCANIC ENVIRONMENT, SONORA, MEXICO by Baltazar Solano Rico A Thesis Submitted to the Faculty of the DEPARTMENT OF MINING AND GEOLOGICAL ENGINEERING In Partial Fulfillment of the Requirements For the Degree of MASTER OF SCIENCE WITH A MAJOR IN GEOLOGICAL ENGINEERING In the Graduate College THE UNIVERSITY OF ARIZONA 19 7 5 STATEMENT BY AUTHOR This thesis has been submitted in partial fulfillment of re quirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. Brief quotations from this thesis are allowable without special permission, provided that accurate acknowledgment of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the head of the major department or the Dean of the Graduate College when in his judg ment the proposed use of the material is in the interests of scholar ship. -
CONTRIBUTION to PETROLOGY and K/Ar AMPHIBOLE DATA for PLUTONIC ROCKS of the HAGGIER MTS., SOCOTRA ISLAND, YEMEN
Acta Geodyn. Geomater., Vol. 6, No. 4 (156), 441–451, 2009 CONTRIBUTION TO PETROLOGY AND K/Ar AMPHIBOLE DATA FOR PLUTONIC ROCKS OF THE HAGGIER MTS., SOCOTRA ISLAND, YEMEN 1) 2) .Ferry FEDIUK * and Kadosa BALOGH 1) Geohelp, Na Petřinách 1897, Praha 6, Czech Republic 2) Institute of Nuclear Research of the Hungarian Academy of Sciences *Corresponding author‘s e-mail: [email protected] (Received June 2009, accepted November 2009) ABSTRACT A morphologically distinct intrusive massif emerges from sedimentary Mesozoic/Tertiary cover in Eastern Socotra forming the high Haggier Mts. It is mostly composed of peralkaline and hypersolvus granite partly accompanied by gabbroic rocks. Amphibole, the sole mafic mineral of the granite, shows predominately the arfvedsonite composition, while riebeckite, for which Socotra is reported in most manuals of mineralogy as the “locus typicus”, occurs subordinately only. Either Paleozoic or Tertiary age has been assumed for this massif for a long time. In the last decade, however, K/Ar datings have been published clearly showing Precambrian (Neoproterozoic) age. The present authors confirm with somewhat modified results this statement by five new radiometric measurements of monomineral amphibole fractions yielding values of 687 to 741 Ma for granites and 762 Ma for gabbroic rocks. The massif represents an isolated segment of numerous late postorogenic Pan- African A-granite bodies piercing the Nubian-Arabian Shield and is explained as the result of partial melting of Pan-African calc-alkaline shield rocks in the closing stage of the orogeny. KEYWORDS: Yemen, Socotra, Arabian–Nubian Shield, K/Ar data, amphiboles, peralkaline granite, coronitic gabbronorite, Neoproterozoic 1. -
Petrographic Study of a Quartz Diorite Stock Near Superior, Pinal County, Arizona
Petrographic study of a quartz diorite stock near Superior, Pinal County, Arizona Item Type text; Thesis-Reproduction (electronic); maps Authors Puckett, James Carl, 1940- Publisher The University of Arizona. Rights Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author. Download date 23/09/2021 23:40:37 Link to Item http://hdl.handle.net/10150/554062 PETROGRAPHIC STUDY OF A QUARTZ DIORITE STOCK NEAR SUPERIOR, PINAL COUNTY, ARIZONA by James Carl Puckett, Jr. A Thesis Submitted to the Faculty of the DEPARTMENT OF GEOLOGY In Partial Fulfillment of the Requirements For the Degree of MASTER OF SCIENCE In the Graduate College THE UNIVERSITY OF ARIZONA 1 9 7 0 STATEMENT BY AUTHOR This thesis has been submitted in partial fulfillment of re quirements for an advanced degree at The University of Arizona and is deposited in the University Library to be made available to borrowers under rules of the Library. Brief quotations from this thesis are allowable without special permission, provided that accurate acknowledgment of source is made. Requests for permission for extended quotation from or reproduction of this manuscript in whole or in part may be granted by the head of the major department or the Dean of the Graduate College when in his judg ment the proposed use of the material is in the interests of scholar ship. In all other instances, however, permission must be obtained from the author. -
The Commingling of Diverse Magma Types in the Fwgstaff Ltlke Igneous Complex
Maine Geological Survey Studies in Maine Geology: Volume 3 1989 The Commingling of Diverse Magma Types in the Fwgstaff Ltlke Igneous Complex Roger L. Nielsen1 Emily S. Landis Vincent M . Ceci Cynthia}. Post01i2 Department ofGeo logy University of Maryland College Park, Maryland 20742 1Present address: College of Oceanography Oregon State University Corvallis, Oregon 97331 2 Present address: Building 222, Room A/21 National Bureau ofStandards Gaithersburg, Maryland 20899 ABSTRACT The Flagstaff Lake Igneous Complex is a member of an array of Acadian plutons which extend from the Katahdin batholith in the northeast to New Hampshire in the southwest. It is characterized by four major rock types: (1) gabbro, (2) granite, (3) garnet tonalite, and (4) trondhjemite. Field, petrographic, and geochemical evidence support the hypothesis that these diverse rocks existed as contemporaneous liquids, and that extensive mixing occurred at the time of emplacement. The dominant mafic mineral pairs in the gabbros are olivine-clinopyroxene, two pyroxenes, and pyroxene hornblende. The high Fe, low Ni and Cr contents of most of the gab bro sampled imply that it underwent substantial fractional crystallization prior to and during emplacement. The granitic rocks of the Flagstaff Lake Igneous Complex are heterogeneous, ranging from two-mica granites with equal amounts (-30%) of orthoclase, plagioclase, and quartz, to mafic diorites. These K-feldspar-bearing silicic rocks are exposed over -40% of the areal extent of the complex. Trondhjemite containing biotite, plagioclase, cordierite, and quartz, with minor muscovite and K-feldspar, is located along the margins of the intrusion, particularly in areas where the contact between the gabbro and granite intersects aluminous metapelitic wall rocks. -
Geology and Petrology of the Devils Tower, Missouri Buttes, and Barlow Canyon Area, Crook County, Wyoming Don L
University of North Dakota UND Scholarly Commons Theses and Dissertations Theses, Dissertations, and Senior Projects 1980 Geology and petrology of the Devils Tower, Missouri Buttes, and Barlow Canyon area, Crook County, Wyoming Don L. Halvorson University of North Dakota Follow this and additional works at: https://commons.und.edu/theses Part of the Geology Commons Recommended Citation Halvorson, Don L., "Geology and petrology of the Devils Tower, Missouri Buttes, and Barlow Canyon area, Crook County, Wyoming" (1980). Theses and Dissertations. 119. https://commons.und.edu/theses/119 This Dissertation is brought to you for free and open access by the Theses, Dissertations, and Senior Projects at UND Scholarly Commons. It has been accepted for inclusion in Theses and Dissertations by an authorized administrator of UND Scholarly Commons. For more information, please contact [email protected]. GEOLOGY AND PETROLOGY OF THE DEVILS TOWER, MISSOURI BUTTES, AND BARLOW CANYON AREA, CROOK c.OUNTY, WYOMING by Don L. Halvorson Bachelor of Science, University of Colorado, 1965 Master of Science Teaching, University of North Dakota, 1971 A Dissertation Submitted to the Graduate Faculty of the University of North Dakota in partial fulfillment of the requirements for the degree of Doctor of Philosophy Grand Forks, North Dakota May 1980 Th:ls clisserratio.1 submitted by Don L. Halvol'.'son in partial ful fillment of the requirements fo1· the Degree of Doctor of Philosophy from the University of North Dakota is hereby approved by the Faculty Advisory Committee under whora the work has been done. This dissertation meets the standards for appearance aud con forms to the style and format requirements of the Graduate School of the University of North Dakota, and is hereby approved. -
Tom Abstraktow 6B-Ost Ver Publ.Pdf
Cover photo: A euhedral, oscillatory zoned, primary monazite has been altered at the rims and along cracks to an allanite-apatite-xenotime assemblage. The host mineral is feldspar. Granite, Strzegom Massif. Workshop on accessory minerals, University of Warsaw, September 2014 Editors of Volume Bogusław BAGIŃSKI, Oliwia GRAFKA Witold MATYSZCZAK, Ray MACDONALD Institute of Geochemistry, Mineralogy and Petrology, University of Warsaw Al. Żwirki i Wigury 93, 02-089 Warszawa [email protected] Language correction: Ray MACDONALD Institute of Geochemistry, Mineralogy and Petrology, University of Warsaw Al. Żwirki i Wigury 93, 02-089 Warszawa [email protected] 1 Organizing committee: Bogusław BAGIŃSKI Ray MACDONALD Michał RUSZKOWSKI Financial support: Workshop on accessory minerals was financially supported by the Polish Ministry of Science and Higher Education subvention and research grant No N N307634040, Faculty of Geology University of Warsaw and PIG-PIB. 2 Workshop on accessory minerals, University of Warsaw, September 2014 Preface The progress made over the past two decades in our understanding of accessory minerals containing HFSE has been remarkable. Even when “fresh-minted”, minerals such as monazite, xenotime, allanite and zircon are compositionally and structurally complex. The complexity increases many times during low-temperature alteration processes, such as interaction with hydrothermal fluids and weathering. Progress has, of course, been expedited by the introduction of a range of exciting new technologies, especially in structure determinations. On re-reading the excellent 2002 review of accessory mineral research by Poitrasson et al., one is struck by how far the subject area has advanced in 12 years. We felt that this was an opportune time to bring together a group of Earth scientists with special expertise in accessory minerals to outline their current research interests, to share ideas and to consider productive future research directions. -
Chapter 1 – Introduction – Review of Rocks and Plate Tectonics Practice Exam and Study Guide
Chapter 1 – Introduction – Review of Rocks and Plate Tectonics Practice Exam and Study Guide To be able to understand the material covered during this course you need to have a basic background in the kinds of rocks making up our planet. This section of the study guide is aimed at helping you gain that background. 1. What are the three major groups of rocks found on planet Earth? Igneous Rocks 2. Which of the following processes is associated with igneous rocks? a. Solid‐state recrystallization b. Weathering and erosion c. Transportation and deposition d. Cooling a silicate liquid to a solid rock e. The accumulation of granitic debris in a moraine 3. If a silicate liquid flows out along the Earth’s surface or seabed, then it is called _______________. 4. If a silicate liquid exists beneath the Earth’s surface or seabed, then it is called _______________. 5. Which of the following terms refer to a body of magma or its solidified equivalent? a. Basalt b. Sandstone c. Gneiss d. Pluton e. Schist 6. If you can see the crystals making up an igneous rock with the naked eye, then the texture is described as a. Pyroclastic b. Phaneritic c. Aphanitic d. Porphyritic e. Aphyric from Perilous Earth: Understanding Processes Behind Natural Disasters, ver. 1.0, June, 2009 by G.H. Girty, Department of Geological Sciences, San Diego State University Page 1 7. In an aphanitic igneous rock can you make out the outlines of individual crystals with the naked eye? Yes or No 8. What type of igneous rock is the most volumetrically important on our planet? Intrusive Igneous Rocks 9. -
Open-File Report 2005-1235
Prepared in cooperation with the Idaho Geological Survey and the Montana Bureau of Mines and Geology Spatial databases for the geology of the Northern Rocky Mountains - Idaho, Montana, and Washington By Michael L. Zientek, Pamela Dunlap Derkey, Robert J. Miller, J. Douglas Causey, Arthur A. Bookstrom, Mary H. Carlson, Gregory N. Green, Thomas P. Frost, David E. Boleneus, Karl V. Evans, Bradley S. Van Gosen, Anna B. Wilson, Jeremy C. Larsen, Helen Z. Kayser, William N. Kelley, and Kenneth C. Assmus Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government Open-File Report 2005-1235 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior Gale A. Norton, Secretary U.S. Geological Survey P. Patrick Leahy, Acting Director U.S. Geological Survey, Reston, Virginia 2005 For product and ordering information: World Wide Web: http://www.usgs.gov/pubprod Telephone: 1-888-ASK-USGS For more information on the USGS—the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment: World Wide Web: http://www.usgs.gov Telephone: 1-888-ASK-USGS Although this report is in the public domain, permission must be secured from the individual copyright owners to reproduce any copyrighted material contained within this report. Contents Abstract .......................................................................................................................................................... 1 Introduction -
Petrography and Physicomechanical Properties of Rocks from the Ambela Granitic Complex, NW Pakistan
Hindawi Publishing Corporation The Scientific World Journal Volume 2013, Article ID 349381, 8 pages http://dx.doi.org/10.1155/2013/349381 Research Article Petrography and Physicomechanical Properties of Rocks from the Ambela Granitic Complex, NW Pakistan Mohammad Arif,1 S. Wajid Hanif Bukhari,2 Noor Muhammad,3 and Muhammad Sajid1 1 Department of Geology, University of Peshawar, Peshawar 25120, Pakistan 2 Centre of Excellence in Mineralogy, University of Balochistan, Quetta 87300, Pakistan 3 Department of Mining Engineering, NWFP University of Engineering and Technology, Peshawar 25120, Pakistan Correspondence should be addressed to Mohammad Arif; arif [email protected] Received 17 April 2013; Accepted 11 May 2013 Academic Editors: M. Gregoire,N.Hirao,J.A.Morales,L.Tosi,andJ.Yvon´ Copyright © 2013 Mohammad Arif et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Petrography and physicomechanical properties of alkali granites, alkali quartz syenite, and nepheline syenite from Ambela, NW Pakistan, have been investigated. Whereas the alkali quartz syenite and most of the alkali granites are megaporphyritic, the nepheline syenite and some of the alkali granites are microporphyritic. Their phenocryst shape and size and abundance of groundmass are also different. The values of unconfined compressive strength (UCS) are the lowest and highest for megaporphyritic alkali granite and alkali quartz syenite, respectively. However, all the four rock types are moderately strong. Correspondingly, their specific gravity and water absorption values are within the permissible range for use as construction material. The UCS for the alkali quartz syenite is the highest, most probably because (i) it has roughly equal amounts of phenocryst and groundmass, (ii) it displays maximum size contrast between phenocryst and groundmass, (iii) its phenocrysts are highly irregular, and (iv) it contains substantial amounts of quartz. -
Laboratory 5 in Your Lab Book on Pages 129-152 to Answer the Questions in This Work Sheet
LAST NAME (ALL IN CAPS): ____________________________________ FIRST NAME: _________________________ 6. IGNEOUS ROCKS AND VOLCANIC HAZARDS Instructions: Refer to Laboratory 5 in your lab book on pages 129-152 to answer the questions in this work sheet. Your work will be graded on the basis of its accuracy, completion, clarity, neatness, legibility, and correct spelling of scientific terms. Some rocks that you would be working with may have sharp edges and corners, therefore, be careful when working with them! When you are done with your lab work, please clean the desk and leave all materials you worked with in the same way you found them! INTRODUCTION MAFIC COLOR INDEX (MCI): Is an estimate of the % of mafic (dark) minerals by volume. Mafic minerals are dark colored minerals such as olivine, pyroxene, amphibole, and biotite; Felsic minerals are light colored minerals such as quartz, plagioclase feldspar, k-feldspar, and muscovite. Ultramafic rocks: CI > 85% (made up of more than 85% mafic minerals) Mafic rocks: CI 46-85% Intermediate rocks: CI 16-45% Felsic rocks: CI 0-15% ORIGIN OF ROCK (INTRUSIVE/EXTRUSIVE) Intrusive (plutonic): formed from magma; made up of large minerals (coarse-grained) Extrusive (volcanic): formed from lava; made up of microscopic crystals (fine-grained) TEXTURES OF IGNEOUS ROCKS Phaneritic: Coarse grain size; visible grains (1-10 mm); result of slow cooling Pegmatitic: Minerals are exceptionally large: > 1 cm long Porphyritic: Composed of crystals of 2 different sizes indicative of multistage cooling history (intrusive/extrusive) long period of slow partial cooling from a magma forms the large crystals sudden extrusion of the remaining magma and the already formed crystals Aphanitic: Fine grain size (< 1 mm); result of quick cooling Glassy: Lack crystals; superfast cooling Vesicular: Contains tiny holes called vesicles which formed due to gas bubbles in the lava.