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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................................................... -
Summary of the Mineral Information Package for the Khanneshin Carbonatite Area of Interest
Chapter 21A. Summary of the Mineral Information Package for the Khanneshin Carbonatite Area of Interest Contribution by Robert D. Tucker, Harvey E. Belkin, Klaus J. Schulz, Stephen G. Peters, and Kim P. Buttleman Abstract The Khanneshin carbonatite is a deeply dissected igneous complex of Quaternary age that rises approximately 700 meters above the flat-lying Neogene sediments of the Registan Desert, Helmand Province, Afghanistan. The complex consists almost exclusively of carbonate-rich intrusive and extrusive igneous rocks, crudely circular in outline, with only three small hypabyssal plugs of leucite phonolite and leucitite outcropping in the southeastern part of the complex. The complex is broadly divisible into a central intrusive vent (or massif), approximately 4 kilometers in diameter, consisting of coarse-grained sövite and brecciated and agglomeratic barite-ankerite alvikite; a thin marginal zone (less than 1 kilometer wide) of outwardly dipping (5°–45°). Neogene sedimentary strata; and a peripheral apron of volcanic and volcaniclastic strata extending another 3–5 kilometers away from the central intrusive massif. Small satellitic intrusions of biotite-calcite carbonatite, no larger than 400 meters in diameter, crop out on the southern and southeastern margin of the central intrusive massif. In the 1970s several teams of Soviet geologists identified prospective areas of interest for uranium, phosphorus, and light rare earth element (LREE) mineralization in four regions of the carbonatite complex. High uranium concentrations are reported in two regions; the greatest concentrations are confined to silicified shear zones in sandy clay approximately 1.1 kilometers southwest of the peripheral part of the central vent. An area of phosphorus enrichment, primarily occurring in apatite, is present in coarse-grained agglomeratic alvikite, with abundant fenite xenoliths, approximately 750 meters south of the periphery of the central vent. -
Geological Sukvey
DEPABTMENT OF THE IHTERIOE BULLETIN OF THE UNITED STATES GEOLOGICAL SUKVEY No. 148 WASHINGTON' G-OVEKNMENT PRINTING OFFICE 1897 UNITED STATES GEOLOGICAL SUEYEY CHARLES D. WALCOTT, 'DIRECTOR ANALYSES OF ROCKS ANALYTICAL METHODS LABORATORY OF THE UNITED STATES GEOLOGICAL SURVEY 1880 to 1896 BY F. W. CLAEKE AND W. F. HILLEBEAND WASHINGTON GOVERNMENT PRINTING OFFICE 1897 CONTENTS. Pago. Introduction, by F. W. Clarke ....'.......................................... 9 Some principles and methods of analysis applied to silicate rocks; by W. F. Hillebrand................................................................ 15 Part I. Introduction ................................................... 15 Scope of the present paper .......................................... 20 Part II. Discussion of methods ..................................i....... 22 Preparation of sample....................:.......................... 22 Specific gravity. ............................: ......--.........--... 23 Weights of sample to be employed for analysis....................... 26 Water, hygroscopic ................................ ................. 26 Water, total or combined....... ^.................................... 30 Silica, alumina, iron, etc............................................ 34 Manganese, nickel, cobalt, copper, zinc.............................. 41 Calcium and strontium...................................... ........ 43 Magnesium......................................................... 43 Barium and titanium............... .... ............................ -
Highwood Mountains Range Analysis Project Area on Those Resources Affected by Implementation
United States Department of Agriculture Environmental Forest Service Assessment 2015 Highwood Mountains Range Judith Ranger District, Lewis and Clark National Forest Cascade, Choteau and Judith Basin Counties, Montana For More Information Contact: Lewis and Clark National Forest Judith Ranger District Standford, Montana www.fs.fed.us/r1/lewisclark/projects 406-566-2292. The U.S. Department of Agriculture (USDA) prohibits discrimination in all its programs and activities on the basis of race, color, national origin, age, disability, and where applicable, sex, marital status, familial status, parental status, religion, sexual orientation, genetic information, political beliefs, reprisal, or because all or part of an individual’s income is derived from any public assistance program. (Not all prohibited bases apply to all programs.) Persons with disabilities who require alternative means for communication of program information (Braille, large print, audiotape, etc.) should contact USDA’s TARGET Center at (202) 720-2600 (voice and TTY). To file a complaint of discrimination, write to USDA, Director, Office of Civil Rights, 1400 Independence Avenue, SW., Washington, DC 20250-9410, or call (800) 795-3272 (voice) or (202) 720-6382 (TTY). USDA is an equal opportunity provider and employer. Environmental Assessment Table of Contents Introduction ...................................................................................................................................................4 Location of the Proposed Project Area ..........................................................................................................4 -
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. -
Nd, Pb and Sr Isotopic Data from the Napak Carbonatite-Nephelinite Centre, Eastern Uganda: an Example of Open-System Crystal Fractionation
Contrib Mineral Petrol (1994) 115:356-366 Contributions tO Mineralogy and Petrology Springer-Verlag 1994 Nd, Pb and Sr isotopic data from the Napak carbonatite-nephelinite centre, eastern Uganda: an example of open-system crystal fractionation Antonio Simonetti and Keith Bell Ottawa-Carleton Geoscience Centre, Department of Earth Sciences, Carleton University, Ottawa, Ontario K1S 5B6, Canada Received June 30, 1992 / Accepted May 25, 1993 Abstract. Nd, Pb and Sr isotopic data from nephelinite magmas cannot be in equilibrium with a lherzolitic mantle lavas from the Tertiary nephelinite-carbonatite complex source (Bultitude and Green 1968, 1971; Allen et al. 1975; of Napak, eastern Uganda, show large isotopic variations Merrill and Wyllie 1975), but are probably the products of that can only be attributed to open-system behaviour. small ( < 5%) degrees of partial melting of a carbonated Possible explanations of the data include mixing between (high C02/H20 ratio) peridotite or pyrolite at high pres- nephelinitic melts derived from an isotopically heterogen- sures (Brey and Green 1977; Brey 1978; Olafsson and eous mantle, or interaction between a HIMU melt and Eggler 1983; Wallace and Green 1988). Experimental re- mafic granulites. In both models crystal fractionation, sults are consistent with derivation of a primary involving olivine and clinopyroxene, played an important nephelinitic liquid from an amphibole peridotite at pres- role. Major element chemistry, textural evidence and iso- sures of 20 to 25 kbar (Olafsson and Eggler 1983; Eggler topic data from clinopyroxene phenocrysts from the ol- 1989). ivine-bearing nephelinites, suggest that the pyroxenes did The eastern branch of the East African Rift Valley not crystallize from their host liquids. -
The Catalyst
THE CATALYST Vol. 47, No. 3 The Independent Student Newspaper of Colorado College September 16, 2016 East Campus Housing Designs Revealed plan in place for how this will work. By RILEY HUTCHINGS Living in any of these rooms Come next fall, what looks like an should cost the same amount as empty lot now will house 154 Colo- living in Jackson, Arthur, or the rado College students. Construc- Western Ridge Apartments. tion began on July 25, 2016 and is The construction project is mak- scheduled to be completed on July ing progress every day. The new 1, 2017. buildings will be powered by geo- The complex will consist of two thermal heating, which will be in small houses and six apartments. place by this Friday, Sept. 14. This The two houses will face Uintah energy will fuel the new construc- Street and be similar to the exist- tion and will be available for school ing Jackson and Arthur Houses. use, if CC decides to build more in Four apartments will stretch along the future. Nevada Avenue and will mimic the Two weeks ago, workers finished style of the neighborhood around laying the electrical, sewage, water, the east side of campus. Behind and gas utilities. Next week start- those will be the final two “Brown- ing at 7 a.m. every day, work on the stone” apartments, along with a foundations for the buildings will community building. begin. By early November, 120 park- The community building will face ing spaces will open up for students. Pike’s Peak and include a class- “In order to meet the July 1, 2017 room and laundry facilities for the deadline, we need every bit of complex. -
Alkalic Rocks of Iron Hill Gunnison County, Colorado
If yon do not need this publication after it has served your purpose, please return it to the Geological Survey, using the official mailing label at the end UNITED STATES DEPARTMENT OF THE INTERIOR ALKALIC ROCKS OF IRON HILL GUNNISON COUNTY, COLORADO GEOLOGICAL SURVEY PROFESSIONAL PAPER 197-A UNITED STATES DEPARTMENT OF THE INTERIOR Harold L. Ickes, Secretary GEOLOGICAL SURVEY W. C. Mendenhall, Director Professional Paper 197-A ALKALIC ROCKS OF IRON HILL GUNNISON COUNTY, COLORADO BY ESPER S. LARSEN Shorter contributions to general geology, 1941 (Pages 1-64) UNITED STATES GOVERNMENT PRINTING OFFICE WASHINGTON : 1942 For sale by the Superintendent of Documents, Washington, D. C. ......... Price 40 cents CONTENTS Page Preface, by G. F. Loughlin_________________________ v Other dike rocks_______________-____________________ 29 Abstract____"_--__-___--__________________________ 1 Augite syenite and shonkinite ____.__--___--__--__ 29 Introduction. ______________________________________ 1 Olivine gabbro. ________________________________ 30 Location and topography. _______________________ 1 Carbonate veins_________----__---------__--_---___- 31 Field work and acknowledgments.________________ 2 Character __ __________________________________ 31 Geology of the surrounding area__________________ 2 Origin _______ _ ____ _ __ _.. __ __. ___ .__. 31 Age of the Iron Hill stock_____________________ 2 Hydrothermal processes- ______--_-___-_---_--__-___- 31 General geology of the Iron Hill stock _____________ 3 The hydrothermal products. _____________________ -
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 -
Description of the Fort Benton Quadrangle
DESCRIPTION OF THE FORT BENTON QUADRANGLE. INTRODUCTION. steeply inclined sides. In the center of the range of the throat of a volcano, the dikes which radiate heat and cold, varying greatly, of course, with the the limestones and other stratified rocks are hori from these centers of activity, and the loose mate altitude. The annual rainfall is from 13 to 20 General relations. The Fort Benton quad zontal, or nearly so, while on the flanks structure of rials and lava flows of which the cones Structure_. , of. inches, being greatest in the mountains; June and rangle extends in longitude from 110° to 111° of the mountains they are sharply BheuLMoun- were built. The sedimentary strata October are the rainy months. The snowfall is and in latitude from 47° to 48°. It is inclined and dip away from the moun through which the volcanoes broke up heavy and the mountain tracts are well watered. 69.25 miles Ions; from north to south. extent°ofan tains to the lower plains country. The horizontal and upon which their materials accumulated are, Agriculture is therefore confined to the foothills . quadrangle. 47.36 miles wide, and contains 3272.7 attitude is well shown in the rocks of Belt Park, over most of the area, nearly horizontal or inclined and stream bottoms, except where irrigation is square miles. It includes part of Choteau, the whereas farther north the mountain masses near gently to the north. These rocks belong entirely possible. northwest corner of Fergus, and the eastern part Monarch are formed of blocks of tilted limestones to the Cretaceous system, and denudation has Culture. -
Mineralogy, Geochemistry and Petrology of a Pyrochlore-Bearing Carbonatite at Seabrook Lake, Ontario
Mineralogy, Geochemistry and Petrology of a Pyrochlore-bearing Carbonatite at Seabrook Lake, Ontario by Myron John Osateriko B.Sc, University of British Columbia, 1965 A Thesis Submitted in Partial Fulfilment ' of the Requirements for the Degree of MASTER OF SCIENCE in the Department of GEOLOGY We accept this thesis as conforming to the required standard THE UNIVERSITY OF BRITISH COLUMBIA April, 1967 In presenting this thesis in partial fulfilment of the requirements for an advanced degree at the University of British Columbia, I agree that th3 Library shall make it freely available for reference and study. I further agree that permission for extensive copying of this thesis for scholarly purposes may be granted by the Head of my Department or by his representatives. It is understood that copying or publication of this thesis for financial gain shall not be allowed without my written permission. Depa rtment The University of British Columbia Vancouver 8, Canada i ABSTRACT The Seabrook Lake carbonatite complex is one of the smallest of nine known carbonatite complexes in central Ontario. The complex, which is one-half square mile in area and pear- shaped in plan, consists of fenitized granite and breccia, mafic breccia, ijolite and related breccia, and carbonatite. The bulbous northern part of the complex consists of a plug-like core of carbonatite surrounded by mafic breccia and carbonatite dykes. The narrow southern part consists of ijolite and related breccia. Enveloping all of these rocks.is a fenitized aureole which grades outward to unaltered granite that underlies much of the surrounding area. The carbonatite is composed of calcite with the following minor mineral, in decreasing order of abundance: goethite, microcline, magnesioriebeckite-riebeckite, magnetite-ulvospinel, apatite, hematite, pyrite, albite, biotite, chlorite, pyrochlore, brookite, sphene, ferroan dolomite (ankerite?), aegirine, chalcopyrite, wollastonite and quartz. -
Geology of the Cluggerfluorite Deposit
Revista Brasileira de Geociências 17(3): 288-294, setembro de 1987 GEOLOGY OF THE CLUGGE RFLUORITE DEPOSIT. MATO PRETO. PARANÁ. BRAZIL ROBERT E. JENK INS n- ABSTRACT The Mato Preto fluorite deposite are located in the Ribeira River valley 80 km NNE from Curitiba, Paraná, Brazil. They consist of three known orebodies and numerous minar occurrences wi thin an area of about 15 km ê. Clugger, the largest dcposit, is a hydrothermnl replacemcnt and fracture-fil ling type in a brecciated and sheared contact zone among carbonatitc, nephellne syenitc, phonolite, and tin guaite of the Cretaceous-Paleocene age Mato Preto Igneous Complex. Fluorite occurs LS four subparallel but coalescing ore lenses which forro envelopes about dikes of phonolite-tinguaite and have strlke lengths of 250 m, aggregate thickness up to 80 m, and extend to at least 120 m in depth . Dikes and Ienses strike N50-55E and dip steeply to the northwest. Fluorite forms matrix replacemcnts and crosscutting veins in premineral and intermineral breccias adjacent to dikes. Fluorite mineralizatioo has been introduced in at least two pulses and is associated with barite-celestlre, apatite, rare earth minerais, and sulfides. Late explosive venting of the system has formed pipes of volcanic breccia with crackle breccia in ore adjacent. Fluorite along breakage planes is recrystallized into monomineralic veinlets. Mineralization is associated with fracture controlled epidote aJteration, but major silicification apparently predates ore. The c1ugger deposit was probably fonne d at low pressures and temperatures, possibly within a vent of a now-eroded Mato Preto volcano. RESUMO Os depósitos de Iluorita de Mato Preto situam-se no vale do Rio Ribeira, 80 km a NNE de Curitiba,Paraná.