A Key for Identification of Rock-Forming Minerals in Thin Section

ISBN: 9781138001145 出版年：2017 页码：181 Barker, Andrew J CRC Press

1. Introduction 1.1 Photographs and their captions 1.2 Crystal systems 1.2.1 Miller indices 1.3 Mineral properties in plane-polarised light (PPL) 1.3.1 Shape and form 1.3.2 Textural relationships 1.3.3 Mineral cleavage 1.3.4 Colour and Pleochroism 1.3.5 Relief 1.4 Mineral properties in cross-polarised light (XPL) 1.4.1 Birefringence and interference colours 1.4.2 Twinning 1.4.3 Zoning 1.4.4 Extinction angles 1.4.5 Length-fast and length-slow crystals 1.4.6 Interference figures 2. Key to rock-forming minerals in thin-section 2.1 To decide which Section 2.2 Symbols & abbreviations Section 1: 2 (or 3) cleavage traces Section 2: 1 Cleavage trace, inclined extinction Section 3: 1 Cleavage trace, straight extinction, colourless Section 4: 1 Cleavage trace, straight extinction, coloured Section 5: Imperfect cleavage, parting or arranged fractures Section 6: 0 Cleavage traces, colourless Section 7: 0 Cleavage traces, coloured Section 8: Opaque minerals Appendices: Appendix 1: Birefringence value (delta) and corresponding interference colours for a 30mum rock thin-section. Appendix 2: Birefringence table of minerals in order of delta values. Appendix 3: Glossary. Appendix 4: Mineral abbreviations. References Index