Format:
Online-Ressource (XVIII, 146p. 213 illus. in color, digital)
ISBN:
9783642220517
Series Statement:
SpringerLink
Content:
Roger Taylor
Content:
This text concentrates upon field observations concerning leached cappings and gossans, occurring as oxidised surface expressions of underlying ore zones. Although the advent of modern multielement geochemical sampling and easier mechanical excavation assist considerably in subsurface interpretation, there are still many occasions where the first observation and recognition are made by the lone field geologist. New exposures continue to be found in remote and often difficult terrains, where "on the spot" skills are of prime importance. In general terms the text has been arranged from
Note:
Includes bibliographical references and index
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Gossans and Leached Cappings; Acknowledgements; Preface; CONTENTS; LIST OF FIGURES; Introduction 1; Theoretical Perspectives 2; Initial Recognition 3; 3.1 General aspects; 3.2 Physical factors; 3.2.1 Remoteness (limiting movement); 3.2.2 Concealment (limiting exposure); 3.3 Technical (advancing knowledge); 3.3.1 Changing concepts (geological reassessment); 3.3.2 New technology (scientifi c and technological evolution); 3.4 Sociological (people factors); 3.4.1 Access and risk barriers; 3.4.2 Other opportunities; Broad scale - first pressions 4; 4.1 Size - shape
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4.2 Quartz (textures and sulphide armouring)4.2.1 Textures; 4.2.2 Sulphide remnants; 4.3 Limonite (composition, colour, source interpretation, host rock controls, and textural types); Structure (layering and brecciation) 5; Secondary minerals 6; 6.1 General aspects; 6.2 Iron Goethite aFe3O(OH). Ferric oxyhydroxide. Haematite Fe2O3 . Iron oxide. Jarosite KFe3 (SO4 )2 (OH). Potassium iron hydroxysulphate. Melanterite FeSO4 7 H2O. Hydrated iron sulphate. Vivianite Fe3 (PO4 )2 8 H2O. Hydrated iron phosphate. (Figures 6.1-6.5).
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6.3 Manganese. "Manganese wad" and "Manganese oxides", general terms. Psilomilane ("manganese oxides", general term). Pyrolusite MnO2 . Manganese oxide. Manganite MnO (OH). Manganese oxyhydroxide. Neoticite (MnFeMg) SiO3 .H2O. Hydrated iron silicate. (Figures 6.6-6.7).6.4 Copper (Figures 6.9-6.32); 6.4.1 General aspects; 6.4.2 Copper Cu. Native copper (Figures 6.9-6.10).; 6.4.3 Copper pitch (Figure 6.11). Oxides/ hydroxides of copper, silica, iron and manganese (mineral mixtures); 6.4.4 Cuprite Cu2O. Red copper oxide (also variety chalcotrichite) (Figures 6.12-6.14).
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6.4.5 Tenorite CuO (also termed melaconite or black copper oxide).6.4.6 Malachite Cu2 CO3 (OH)2 . Copper carbonate (established usage ignores hydroxyl input) (Figures 6.12, 6.14, 6.16-6.17).; 6.4.7 Azurite Cu3 (CO3 )2 (OH)2 . Copper carbonate (established usage ignores hydroxyl input) (Figure 6.16).; 6.4.8 Chrysocolla (CuAl)2H2 Si2O5 · n(H2O). Hydrated copper silicate (Figure 6.18-6.19).; 6.4.9 Chalcanthite CaSO4 · 5H2O. Hydrated copper sulphide (Figure 6.20).; 6.4.10 Atacamite Cu2 Cl (OH)3 . Copper hydroxychloride (Figure 6.21).
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6.4.11 Brochantite CuSO4 (OH)6 . Copper hydroxysulphate (Figure 6.22)6.4.12 Antlerite Cu3 SO4 (OH)4 . Copper hydroxysulphate (Figure 6.23); 6.4.13 Rare secondary copper minerals; 6.4.14 Supergene copper sulphides (Figures 6.30-6.32); 6.5 Lead (Figures 6.33-6.44); 6.5.1 General aspects; 6.5.2 Anglesite PbSO4 . Lead sulphate (Figures 6.36-6.38).; 6.5.3 Cerussite PbCO3. Lead carbonate (Figures 6.33-6.35).; 6.5.4 Lead oxides (Figures 6.36, 6.38-6.39). Massicot PbO. Lead oxide. Litharge PbO. Lead oxide. Minium Pb3O4 . Lead oxide.
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6.5.5 Plumbojarosite PbFe6 (SO4 )4 (OH)12. Lead/iron hydroxysulphate (Figure 6.40).
Additional Edition:
ISBN 9783642220500
Additional Edition:
Buchausg. u.d.T. Taylor, Roger Gossans and Leached Cappings Heidelberg, Dordrecht [u.a.] : Springer, 2011 ISBN 9783642220500
Additional Edition:
ISBN 3642220509
Language:
English
Keywords:
Eiserner Hut
;
Sekundäre Lagerstätte
;
Geochemie
;
Prospektion
;
Feldgeologie
;
Eiserner Hut
;
Sekundäre Lagerstätte
;
Geochemie
;
Prospektion
;
Feldgeologie
DOI:
10.1007/978-3-642-22051-7
URL:
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