BGS Rock Classification Scheme
Group-2-kimberlite - A type of kimberlite. Group-2-kimberlite corresponds to micaceous or lamprophyric kimberlites. They are characterised by the presence of macrocrysts, phenocrysts and groundmass micas, which vary from phlogopite to tetraferriphlogopite. British Geological Survey Research Report RR/99/06, section 6.4.
| Code | G2KMB |
|---|---|
| Description | Group-2-kimberlite - A type of kimberlite. Group-2-kimberlite corresponds to micaceous or lamprophyric kimberlites. They are characterised by the presence of macrocrysts, phenocrysts and groundmass micas, which vary from phlogopite to tetraferriphlogopite. British Geological Survey Research Report RR/99/06, section 6.4. |
| Qualifiers | No qualifiers currently exist. |
| Definition | Volatile-rich (CO2) K exotic intrusive rock; macro-/phenocrysts/matrix of phlog/tetrafephlog/ol, in matrix of +/-2nd diop/spin/chrom/magnet/perovs/apat/REE phos/Ti-ates/rut/ilmen/cal/dol/ancyl/norseth/serp, rare sani/richter; 2nd bar mica/lamprophyric kim |
| Linked data | http://data.bgs.ac.uk/id/EarthMaterialClass/RockName/G2KMB |
CAVEAT
"Thumbnail" definitions attached to some of the table entries are an interim attempt to provide simple short descriptions of the "unqualified" rock types presented within the BGS Rock Classification Scheme. Every effort has been made to ensure accuracy and consistency but minor contradictions or omissions might be present. The BGS welcomes any feedback pointing out such minor imperfections and/or providing constructive comment and suggestions for improvement of the definitions. In the first instance such feedback should be directed to Dr Tim McCormick.