Ore Textures: Recognition and Interpretation by Roger Taylor

By Roger Taylor

This e-book is particularly designed for the sphere geologist operating with no the advantages of subtle chemical, mineralogical or petrological aid. It covers the fundamental construction blocks of textural reputation starting with infill, alteration and overprinting (the basic complexity because of successive creation of hydrothermal fluids often followed or preceded through renewed fracturing) and ends with an in depth exam of textures linked to tectonic and intrusive breccias.
The ebook presents the development blocks for realizing the whole diversity of textures usually linked to hydrothermal ore deposits
Contents
Acknowledgments
COMMERCIAL SPONSORS
Preface
Volume 1 • Infill Textures
1 Introduction
2 acceptance Criteria
3 difficulties and dealing Techniques
4 How and the place to seem for Infill Textures - Channelway Recognition
Volume 2 • Alteration Textures
1 Introduction
2 simple Principles
3 method of Alteration
4 Alteration minerals - a few basic Observations
5 review Sheet
6 References
Volume three • Overprinting Textures
1 Introduction
2 Overprinting criteria
3 Overprinting Textures
4 First Order standards - Mineral Superimposition
5 First Order standards - Structural Superimposition
6 First Order standards - Structural Superimposition
7 moment Order standards Suspicion Arousing
6 References
Volume four • damaged Rocks - Breccias I
1 Introduction
2 remark of damaged Rock Patterns
3 method of figuring out damaged Rock Patterns
4 association of Plates - layout Philosophy
5 References
Volume five • damaged Rocks - Breccias II
Introduction, Scope and association of Volume
1 preliminary Recognition
2 basic positive aspects - diversity in types and Scale of Intrusive Breccia
3 Multistage Structural and Hydrothermal Overprinting
4 exact good points linked to chosen Intrusive Breccias
5 Intrusive Breccia linked to Maar-Volcanoes and linked Structures
6 Intrusive Breccia in different Epithermal Systems
7 References
Index

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Extra resources for Ore Textures: Recognition and Interpretation

Sample text

_\d`ZXc8nXi\e\jj 8i\k_\i\XepfYm`fljZ_\d`ZXcZ_Xe^\j6 This volume has not been written from the chemical viewpoint and will no doubt incur minor irritation from fluid geochemists. The chemical adjustments are of course of paramount importance in gaining information as to the nature of the ore fluids. This field of endeavour is of equal importance to that of recognition/observation and it is a little unfortunate that many of the top observers are very poor fluid geochemists and visa versa.

Silica (grey-white) predominates towards the right hand edge. The same silica is present throughout the rest of the alteration zone but is also accompanied by another form of dark grey silica. The second mineral is a dark to pale white mica which is dark coloured on most of the slab surface, but looks much paler on the normal rock face. The mica also has two major forms, occurring as discrete dark coarse crystal clusters within the high-silica (grey-white) zone and as finer-grained slightly paler aggregations within the dark-grey silica zones of the outer regions approaching the granite host.

Fi\K\okli\j › Mfcld\) › 8ck\iXk`feK\okli\j N_Xk`jk_\d`e\iXcf^pf]k_\Xck\iXk`fe Xjj\dYcX^\ÆN_Xkn`cc@ZXcc`k6 *%, K\okliXcFYj\imXk`fe N_XkXi\k_\k\okliXcZ_Xe^\j`emfcm\[`ek_\ Xck\iXk`fegifZ\jj6 Most alteration assemblages exhibit an incredible degree of textural inheritance from their host rocks. Coarse-grained rocks such as granites or gneisses produce coarse-grained alteration products, whereas fine-grained rocks such as micro granites or shales change to fine-grained products.

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