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Host Rock
5.7 ROCK TYPE/LITHOLOGY(*) (R25) (E25) (E26)
At least one Rock Type/Lithology must be entered for each occurrence. A total of ten different rock types
and up to three modifiers for each rock type may be identified for each occurrence. Appendix III is a
listing of current rock names and modifiers. This table will be updated periodically as required. The rock
types that host the significant mineralization should be listed in their order of importance and
should correspond with the Dominant Hostrock category. Other lithologies identified should correspond
with the FORMAL and INFORMAL hostrocks.
All rock types plus modifiers identified should be written out in full in the lithology field on the coding
card. Care should be taken not to duplicate rock types by using synonyms (e.g., diabase dike and diorite
dike). The Rock Type(s)/Lithologies must be included in the Capsule Geology description.
Example:
MODIFIER SEARCH CODE(S) ROCK TYPE SEARCH CODE ROCK TYPE/LITHOLOGY
BSLT Basalt
ALKL BSLT Alkali Basalt
QRTZ FLDP PRPR Quartz Feldspar Porphyry
5.8 COMMENTS - HOST ROCK (C06)
Text may be added to the comment field to clarify hostrock or age dating information.
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