Museum accession no. | IPG slide ref. | Geochemical comparison ** | Petrological comparison (diagnostic features) with levels of confidence (scale 1-5) | Overall similarity*** |
---|---|---|---|---|
LM 80.53* | C52 | 94% | Intergranular, sub-ophitic, twinned augite with 'herring bone' texture; exsolved Fe oxide grains; interstitial and rare granophyric texture; minor epidote. (5/5) | 5/5 |
Hu300-1942-356* | Y772 | 75% | 'Doleritic texture' (unusual); coarse twinned; ophitic, augite, fractured plagioclase with alteration along planes to chlorite. (3/5) | (3/5) |
Car 124-1962* | C19 | 63% | Framework sub-euhedral plagioclase; extensive quartz and granophyric intergrowths; intragranular uralitised augite; minor hornblende and biotite. (4/5) | (4/5) |
Car 18-1970-1* | C20 | 56% | Highly altered uralitised, sub-ophitic augite; primary hornblende; minor fine exsolved skeletal and blade Fe oxide grains; extensive cholritisation. (3/5) | (3/5) |
Sc 808-38* | Y448 | 50% | Common features; exsolved Fr oxide grains; minor interstitial quartz. Uncommon features: spherulitic plagioclase; no uralitisation of ophitic augite. (2.5/5) | inconclusive |
Car 52-1970 | C23 | 50% | Twinned; uralitised augite with 'herring bone' texture; coarse framework plagioclase; extensive interstitial quartz and granophyric intergrowths; skeletal Fe oxide grains. (4/5) | (4/5) |
Hu 300-1942-81 | Y623 | 44% | Not typical stressed uralitised, ophitic augite with patchy undulose extinction; clustering of mafics; fracturing. (2/5) | No matched |
Car 8-1967 | C133 | 38% | Predominantly subhedral pleochroic hornblende (70%) in fine chloritised groundmass. Not the Carrock Fell Gabbro. (1/5) | Not matched |
Car 14-1899-6 | C80 | 31% | Intragranular twinned, uralitised augite with 'herring bone' texture; framework subhedral zoned plagioclase; interstitial quartz and granophyric intergrowths. (4/5) | (3/5) |
Car A II 223 | C81 | 25% | Uralitised augite; highly fractured plagioclase with alteration along planes to chlorite; coarse exsolved Fe oxide grains; alteration to fibrous hornblende and chlorite. (3.5/5) | (3/5) |
* denotes implements within sample found to be geochemically statistically similar to the Carrock Fell Gabbro.
** ranked by score (at 1 SD level)
*** with confidence rating (scale 1-5).