文档介绍：BRITISH GEOLOGICAL SURVEY
RESEARCH REPORT
NUMBER RR 99–02
BGS Rock Classification Scheme
Volume 2
Classification of metamorphic rocks
S Robertson
Subject index Rock classification, metamorphic rocks
Bibliographical Reference Robertson, S. 1999.
BGS Rock Classification Scheme
Volume 2
Classification of metamorphic rocks.
British Geological Survey Research Report, RR 99–02.
© NERC Copyright 1999 British Geological Survey
Keyworth
Nottingham NG12 5GG
UK
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Contents
1 Introduction Colour qualifiers
Definition of metamorphism Qualifiers based on protolith structures
Basic principles
References
2 Metamorphic rock nomenclature
Appendix List of approved rock names
Construction of rock names.
How to use the classification scheme
Figures
3 Sedimentary protolith: metasedimentary rocks
Protolith name Figure 1 Flow diagram for assigning root names to
position metamorphic rocks
posed largely of quartz ± Figure 2 Temperature and pressure fields of various
feldspar ± mica with less than 10% metamorphic facies and examples of diagnostic
carbonate and/or calcsilicate minerals