Study of the Structure Model of Todorokite
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Xrd and Tem Studies on Nanophase Manganese
Clays and Clay Minerals, Vol. 64, No. 5, 488–501, 2016. 1 1 2 2 3 XRD AND TEM STUDIES ON NANOPHASE MANGANESE OXIDES IN 3 4 FRESHWATER FERROMANGANESE NODULES FROM GREEN BAY, 4 5 5 6 LAKE MICHIGAN 6 7 7 8 8 S EUNGYEOL L EE AND H UIFANG X U* 9 9 NASA Astrobiology Institute, Department of Geoscience, University of Wisconsin Madison, Madison, 10 À 10 1215 West Dayton Street, A352 Weeks Hall, Wisconsin 53706 11 11 12 12 13 Abstract—Freshwater ferromanganese nodules (FFN) from Green Bay, Lake Michigan have been 13 14 investigated by X-ray powder diffraction (XRD), micro X-ray fluorescence (XRF), scanning electron 14 microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), and scanning 15 transmission electron microscopy (STEM). The samples can be divided into three types: Mn-rich 15 16 nodules, Fe-Mn nodules, and Fe-rich nodules. The manganese-bearing phases are todorokite, birnessite, 16 17 and buserite. The iron-bearing phases are feroxyhyte, goethite, 2-line ferrihydrite, and proto-goethite 17 18 (intermediate phase between feroxyhyte and goethite). The XRD patterns from a nodule cross section 18 19 suggest the transformation of birnessite to todorokite. The TEM-EDS spectra show that todorokite is 19 associated with Ba, Co, Ni, and Zn; birnessite is associated with Ca and Na; and buserite is associated with 20 2+ +2 3+ 20 Ca. The todorokite has an average chemical formula of Ba0.28(Zn0.14Co0.05 21 2+ 4+ 3+ 3+ 3+ 2+ 21 Ni0.02)(Mn4.99Mn0.82Fe0.12Co0.05Ni0.02)O12·nH2O. -
Redalyc.Mineralogical Study of the La Hueca Cretaceous Iron-Manganese
Revista Mexicana de Ciencias Geológicas ISSN: 1026-8774 [email protected] Universidad Nacional Autónoma de México México Corona Esquivel, Rodolfo; Ortega Gutiérrez, Fernando; Reyes Salas, Margarita; Lozano Santacruz, Rufino; Miranda Gasca, Miguel Angel Mineralogical study of the La Hueca Cretaceous Iron-Manganese deposit, Michoacán, south-western Mexico Revista Mexicana de Ciencias Geológicas, vol. 17, núm. 2, 2000, pp. 142-151 Universidad Nacional Autónoma de México Querétaro, México Available in: http://www.redalyc.org/articulo.oa?id=57217206 How to cite Complete issue Scientific Information System More information about this article Network of Scientific Journals from Latin America, the Caribbean, Spain and Portugal Journal's homepage in redalyc.org Non-profit academic project, developed under the open access initiative Revista Mexicana de Ciencias Geológicas, volumen 17, número 2, 143 2000, p. 143- 153 Universidad Nacional Autónoma de México, Instituto de Geología, México, D.F MINERALOGICAL STUDY OF THE LA HUECA CRETACEOUS IRON- MANGANESE DEPOSIT, MICHOACÁN, SOUTHWESTERN MEXICO Rodolfo Corona-Esquivel1, Fernando Ortega-Gutiérrez1, Margarita Reyes-Salas1, Rufino Lozano-Santacruz1, and Miguel Angel Miranda-Gasca2 ABSTRACT In this work we describe for the first time the mineralogy and very briefly the possible origin of a banded Fe-Mn deposit associated with a Cretaceous volcanosedimentary sequence of the southern Guerrero terrane, near the sulfide massive volcanogenic deposit of La Minita. The deposit is confined within a felsic tuff unit; about 10 meters thick where sampled for chemical analysis. Using XRF, EDS and XRD techniques, we found besides todorokite, cryptomelane, quartz, romanechite (psilomelane), birnessite, illite-muscovite, cristobalite, chlorite, barite, halloysite, woodruffite, nacrite or kaolinite, and possibly hollandite-ferrian, as well as an amorphous material and two unknown manganese phases. -
Metamorphism of Sedimentary Manganese Deposits
Acta Mineralogica-Petrographica, Szeged, XX/2, 325—336, 1972. METAMORPHISM OF SEDIMENTARY MANGANESE DEPOSITS SUPRIYA ROY ABSTRACT: Metamorphosed sedimentary deposits of manganese occur extensively in India, Brazil, U. S. A., Australia, New Zealand, U. S. S. R., West and South West Africa, Madagascar and Japan. Different mineral-assemblages have been recorded from these deposits which may be classi- fied into oxide, carbonate, silicate and silicate-carbonate formations. The oxide formations are represented by lower oxides (braunite, bixbyite, hollandite, hausmannite, jacobsite, vredenburgite •etc.), the carbonate formations by rhodochrosite, kutnahorite, manganoan calcite etc., the silicate formations by spessartite, rhodonite, manganiferous amphiboles and pyroxenes, manganophyllite, piedmontite etc. and the silicate-carbonate formations by rhodochrosite, rhodonite, tephroite, spessartite etc. Pétrographie and phase-equilibia data indicate that the original bulk composition in the sediments, the reactions during metamorphism (contact and regional and the variations and effect of 02, C02, etc. with rise of temperature, control the mineralogy of the metamorphosed manga- nese formations. The general trend of formation and transformation of mineral phases in oxide, carbonate, silicate and silicate-carbonate formations during regional and contact metamorphism has, thus, been established. Sedimentary manganese formations, later modified by regional or contact metamorphism, have been reported from different parts of the world. The most important among such deposits occur in India, Brazil, U.S.A., U.S.S.R., Ghana, South and South West Africa, Madagascar, Australia, New Zealand, Great Britain, Japan etc. An attempt will be made to summarize the pertinent data on these metamorphosed sedimentary formations so as to establish the role of original bulk composition of the sediments, transformation and reaction of phases at ele- vated temperature and varying oxygen and carbon dioxide fugacities in determin- ing the mineral assemblages in these deposits. -
Washington State Minerals Checklist
Division of Geology and Earth Resources MS 47007; Olympia, WA 98504-7007 Washington State 360-902-1450; 360-902-1785 fax E-mail: [email protected] Website: http://www.dnr.wa.gov/geology Minerals Checklist Note: Mineral names in parentheses are the preferred species names. Compiled by Raymond Lasmanis o Acanthite o Arsenopalladinite o Bustamite o Clinohumite o Enstatite o Harmotome o Actinolite o Arsenopyrite o Bytownite o Clinoptilolite o Epidesmine (Stilbite) o Hastingsite o Adularia o Arsenosulvanite (Plagioclase) o Clinozoisite o Epidote o Hausmannite (Orthoclase) o Arsenpolybasite o Cairngorm (Quartz) o Cobaltite o Epistilbite o Hedenbergite o Aegirine o Astrophyllite o Calamine o Cochromite o Epsomite o Hedleyite o Aenigmatite o Atacamite (Hemimorphite) o Coffinite o Erionite o Hematite o Aeschynite o Atokite o Calaverite o Columbite o Erythrite o Hemimorphite o Agardite-Y o Augite o Calciohilairite (Ferrocolumbite) o Euchroite o Hercynite o Agate (Quartz) o Aurostibite o Calcite, see also o Conichalcite o Euxenite o Hessite o Aguilarite o Austinite Manganocalcite o Connellite o Euxenite-Y o Heulandite o Aktashite o Onyx o Copiapite o o Autunite o Fairchildite Hexahydrite o Alabandite o Caledonite o Copper o o Awaruite o Famatinite Hibschite o Albite o Cancrinite o Copper-zinc o o Axinite group o Fayalite Hillebrandite o Algodonite o Carnelian (Quartz) o Coquandite o o Azurite o Feldspar group Hisingerite o Allanite o Cassiterite o Cordierite o o Barite o Ferberite Hongshiite o Allanite-Ce o Catapleiite o Corrensite o o Bastnäsite -
Mineral Processing
Mineral Processing Foundations of theory and practice of minerallurgy 1st English edition JAN DRZYMALA, C. Eng., Ph.D., D.Sc. Member of the Polish Mineral Processing Society Wroclaw University of Technology 2007 Translation: J. Drzymala, A. Swatek Reviewer: A. Luszczkiewicz Published as supplied by the author ©Copyright by Jan Drzymala, Wroclaw 2007 Computer typesetting: Danuta Szyszka Cover design: Danuta Szyszka Cover photo: Sebastian Bożek Oficyna Wydawnicza Politechniki Wrocławskiej Wybrzeze Wyspianskiego 27 50-370 Wroclaw Any part of this publication can be used in any form by any means provided that the usage is acknowledged by the citation: Drzymala, J., Mineral Processing, Foundations of theory and practice of minerallurgy, Oficyna Wydawnicza PWr., 2007, www.ig.pwr.wroc.pl/minproc ISBN 978-83-7493-362-9 Contents Introduction ....................................................................................................................9 Part I Introduction to mineral processing .....................................................................13 1. From the Big Bang to mineral processing................................................................14 1.1. The formation of matter ...................................................................................14 1.2. Elementary particles.........................................................................................16 1.3. Molecules .........................................................................................................18 1.4. Solids................................................................................................................19 -
Ocean Drilling Program Scientific Results Volume
9. GEOCHEMICAL EXPRESSION OF EARLY DIAGENESIS IN MIDDLE EOCENE-LOWER OLIGOCENE PELAGIC SEDIMENTS IN THE SOUTHERN LABRADOR SEA, SITE 647, ODP LEG 1051 M. A. Arthur,2 W. E. Dean,3 J. C. Zachos,2 M. Kaminski,4 S. Hagerty Rieg,2 and K. Elmstrom2 ABSTRACT Geochemical analyses of the middle Eocene through lower Oligocene lithologic Unit IIIC (260-518 meters below seafloor [mbsf]) indicate a relatively constant geochemical composition of the detrital fraction throughout this deposi tional interval at Ocean Drilling Program (ODP) Site 647 in the southern Labrador Sea. The main variability occurs in redox-sensitive elements (e.g., iron, manganese, and phosphorus), which may be related to early diagenetic mobility in anaerobic pore waters during bacterial decomposition of organic matter. Initial preservation of organic matter was me diated by high sedimentation rates (36 m/m.y.). High iron (Fe) and manganese (Mn) contents are associated with car bonate concretions of siderite, manganosiderite, and rhodochrosite. These concretions probably formed in response to elevated pore-water alkalinity and total dissolved carbon dioxide (C02) concentrations resulting from bacterial sulfate reduction, as indicated by nodule stable-isotope compositions and pore-water geochemistry. These nodules differ from those found in upper Cenozoic hemipelagic sequences in that they are not associated with methanogenesis. Phosphate minerals (carbonate-fluorapatite) precipitated in some intervals, probably as the result of desorption of phosphorus from iron and manganese during reduction. The bulk chemical composition of the sediments differs little from that of North Atlantic Quaternary abyssal red clays, but may contain a minor hydrothermal component. The silicon/ aluminum (Si/Al) ratio, however, is high and variable and probably reflects original variations in biogenic opal, much of which is now altered to smectite and/or opal CT. -
Meteoric Be and Be As Process Tracers in the Environment
Chapter 5 Meteoric 7Be and 10Be as Process Tracers in the Environment James M. Kaste and Mark Baskaran 7 10 Abstract Be (T1/2 ¼ 53 days) and Be (T1/2 ¼ occurring Be isotopes of use to Earth scientists are the 7 1.4 Ma) form via natural cosmogenic reactions in the short-lived Be (T1/2 ¼ 53.1 days) and the longer- 10 atmosphere and are delivered to Earth’s surface by wet lived Be (T1/2 ¼ 1.4 Ma; Nishiizumi et al. 2007). and dry deposition. The distinct source term and near- Because cosmic rays that cause the initial cascade of constant fallout of these radionuclides onto soils, vege- neutrons and protons in the upper atmosphere respon- tation, waters, ice, and sediments makes them valuable sible for the spallation reactions are attenuated by tracers of a wide range of environmental processes the mass of the atmosphere itself, production rates of operating over timescales from weeks to millions of comsogenic Be are three orders of magnitude higher in years. Beryllium tends to form strong bonds with oxygen the stratosphere than they are at sea-level (Masarik and atoms, so 7Be and 10Be adsorb rapidly to organic and Beer 1999, 2009). Most of the production of cosmo- inorganic solid phases in the terrestrial and marine envi- genic Be therefore occurs in the upper atmosphere ronment. Thus, cosmogenic isotopes of beryllium can be (5–30 km), although there is trace, but measurable used to quantify surface age, sediment source, mixing production as oxygen atoms in minerals at the Earth’s rates, and particle residence and transit times in soils, surface are spallated (in situ produced; see Lal 2011, streams, lakes, and the oceans. -
4. a Growth Model for Polymetallic Nodules
A GEOLOGICAL MODEL OF POLYMETALLIC NODULE DEPOSITS IN THE CLARION‐CLIPPERTON FRACTURE ZONE ISA TECHNICAL STUDY SERIES Technical Study No. 1 Global Non‐Living Resources on the Extended Continental Shelf: Prospects at the year 2000 Technical Study No. 2 Polymetallic Massive Sulphides and Cobalt‐Rich Ferromanganese Crusts: Status and Prospects Technical Study No. 3 Biodiversity, Species Ranges and Gene Flow in the Abyssal Pacific Nodule Province: Predicting and Managing the Impacts of Deep Seabed Mining Technical Study No. 4 Issues associated with the Implementation of Article 82 of the United Nations Convention on the Law of the Sea Technical Study No. 5 Non‐Living resources of the Continental Shelf beyond 200 nautical miles: Speculations on the Implementation of Article 82 of the United Nations Convention on the Law of the Sea PAGE | II A GEOLOGICAL MODEL OF POLYMETALLIC NODULE DEPOSITS IN THE CLARION‐ CLIPPERTON FRACTURE ZONE This report contains a summary of two documents – A Geological Model of Polymetallic Nodule Deposits in the Clarion‐Clipperton Fracture Zone and a Prospector’s Guide prepared under the project ‘Development of a Geological Model of Polymetallic Nodule Deposits in the Clarion‐Clipperton Fracture Zone, Pacific Ocean’. ISA TECHNICAL STUDY: NO. 6 International Seabed Authority Kingston, Jamaica PAGE | III The designation employed and the presentation of materials in this publication do not imply the expression of any opinion whatsoever on the part of the Secretariat of the International Seabed Authority concerning the legal status of any country or territory or of its authorities, or concerning the delimitation of its frontiers or maritime boundaries. All rights reserved. -
Geology and Ore Deposits of the Central York Mountains, Western Seward Peninsula, Alaska
Geology and Ore Deposits of p50 the Central York Mountains, I Western Seward Peninsula, S3 Alaska GEOLOGICAL SURVEY BULLETIN 1287 O GC oc O es ^ HI » <=; HI i i QC GO eea 00 Geology and Ore Deposits of the Central York Mountains, Western Seward Peninsula, Alaska By C. L. SAINSBURY GEOLOGICAL SURVEY BULLETIN 1287 Description of the geologic structure, stratigraphy, petrology, and ore deposits of an area containing tin deposits and a new type of beryllium deposit UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1969 UNITED STATES DEPARTMENT OF THE INTERIOR WALTER J. HICKEL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director Library, of Congress catalog-card No, 78-602244 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price $3.00 (paper cover) CONTENTS Page Abstract_ _______________________________________________________ l Introduction__________-__-_-______--__---------____________--_--__ 2 Location_ ___________________________________________________ 2 Purpose and scope of report_._--___-----_--____-________-_-_-_ 3 Methods of study__________-_---___--_--_-_.________._----___ 4 Acknowledgments __________-_-__----___---_______l______--____ 4 Previous work_____-__-__-----_-________--___________---____- 5 Sedimentary rocks._________-____-_-_____-___-_-___________----_-__ 6 Pre-Ordovician rocks___________________________________________ 7 Slate of the York region-____________________________________ 7 Argillaceous and dolomitic limestone.___--___-_______-----___ 9 Undifferentiated limestone and argillaceous and dolomitic lime stone_ ________________________________________________ 10 Summary of pre-Ordovician rocks_______-_-__________------_ 11 Lower Ordovician rocks.____-___-_--_____---__________-___--_-_ 12 Argillaceous limestone and limestone (shallow-water facies) _ _ _. -
ECONOMIC ASPECTS of NODULE MINING Although Deep-Sea
CHAPTER 11 ECONOMIC ASPECTS OF NODULE MINING J. L. MERO INTRODUCTION Although deep-sea manganese nodules were discovered over a'century ago by scientists of the HMS Challenger expedition, few analyses of the nodules for the economically significant elements such as nickel, copper, cobalt and molybdenum were made in those early days and no consideration was given to these deposits as a possible commercial source of metals until the early 1950's when the mining of the nodules was advocated as a possible source of manganese (Mero, 1952). As the result of a haul of nodules taken in relatively shallow water (900 m) about 370 km east of Tahiti on the western edge of the Tuamoto Plateau during the 1957-58 International Geophysical Year (the nodules contained about 2% of cobalt, a valuable metal at that particular time), a study was initiated by the Institute of Marine Resources of the University of California to determine if it might be economic to mine and process the nodules for their cobalt, nickel and copper contents. The results of that study were favourable' with respect to the technical and economic factors involved in mining and processing the nodules. All the research and development in this matter dates from the release of the report describing the results of that study (Mero, 1958). To the present time (1975) over $150 million* has been expended in the exploration of the nodule deposits and in the development of mining and processing systems. An additional $100 million is to be spent in the next few years in these activities. -
Todorokite and Pyrolusite from Vermlands Taberg
NOTES AND NEWS THE AMERICAN MINERALOGIST, VOL. 45, JANUARY_FEBRUARY, 1960 TODOROKITE AND PYROLUSITEFROM VERMLANDS TABERG, SWEDEN Poxrus L;uNccnnN, Unioersity oJ Lund,, Lund., Swed.en During the courseof an examination of the soft iron ore of Vermlands Taberg in western Sweden (P. Ljunggren, 1958) manganesemineraliza- tion was found to have taken place both in the goethitized iron ore and in the argillized wall-rock. The manganeseoxides are found as veins in the soft iron ore, as impregnations in the argillized wall-rock and in secondary calcite veins. A formation of dendrites of manganeseoxides is also very common. This rnanganesemineralization is mainly concen- trated to the border zone between the soft iron ore and the argillized skarn and leptite rocks. The width of the manganiferous veins hitherto found, often less than ten centimetres, is too small to allow any pro- fitable mining of manganeseore. The quite predominating manganeseoxide mineral in these veins is pyrolusite. In a secondary calcite vein cutting the soft iron ore another manganese oxide mineral was found and identified as todorokite (T. Yoshimura, 1934; C. Frondel, 1953).An examination of the pyrolusite and the todorokite is given in the present paper. Tooonoxtrs The todorokite is found as black aggregatesin a 5 cm. wide secondary calcite vein in the soft iron ore. The aggregatesconsist of small needle- shapedcrystals (maximum size0.2X0.01 mm.) arrangedspherulitically or dendritically in the calcite vein. The mineral was found upon ,-ray examination to be identical with todorokite (Mn, Ba, Ca, Mg) MnaOz.HsO, as describedby C. Frondel in 1953 and T. Yoshimura in 1934. -
Cr-Hollandite: Breaking Tradition with Todorokite-Type Manganese Oxides Stanton Ching Connecticut College, [email protected]
Connecticut College Digital Commons @ Connecticut College Chemistry Faculty Publications Chemistry Department 8-2012 Cr-Hollandite: Breaking Tradition with Todorokite-type Manganese Oxides Stanton Ching Connecticut College, [email protected] Jonathan P. Franklin Carley M. Spencer Follow this and additional works at: http://digitalcommons.conncoll.edu/chemfacpub Part of the Chemistry Commons Recommended Citation Ching, S. S., Franklin, J. P., & Spencer, C. M. Cr-hollandite: Breaking tradition with todorokite-type manganese oxides. Polyhedron, 2012, doi:10.1016/j.poly.2012.07.099 This Article is brought to you for free and open access by the Chemistry Department at Digital Commons @ Connecticut College. It has been accepted for inclusion in Chemistry Faculty Publications by an authorized administrator of Digital Commons @ Connecticut College. For more information, please contact [email protected]. The views expressed in this paper are solely those of the author. Elsevier Editorial System(tm) for Polyhedron Manuscript Draft Manuscript Number: POLY-D-12-00837R1 Title: Cr-Hollandite: Breaking Tradition with Todorokite-type Manganese Oxides Article Type: Michelle Millar Issue Keywords: manganese oxide chromium hollandite hydrothermal synthesis Corresponding Author: Dr. Stanton Ching, Corresponding Author's Institution: Connecticut College First Author: Stanton Ching Order of Authors: Stanton Ching; Jonathan P Franklin; Carley M Spencer Manuscript Region of Origin: USA Graphical Abstract (synopsis) (for review) Click here to download high resolution image *Manuscript Click here to view linked References Cr-Hollandite: Breaking Tradition with Todorokite-type Manganese Oxides Stanton Ching,* Jonathan P. Franklin, and Carley M. Spencer Department of Chemistry, Connecticut College, New London, CT 06320, USA * Corresponding author. Tel.: 860-439-2753; fax 860-439-2477; E-mail address: [email protected] This contribution is dedicated to the memory of Michelle M.