| Bingham, UT (n = 3) | Superior, AZ (n = >200) | Bisbee, AZ (n = 5) | |
| % specular hematite (grain size m) | 20-30% (300-600) | > 75% (300-600, up to 2000 common) | > 75% (300-2000 ) |
| % pyrite (grain size m) | > 40% (200-1000) | < 10% (200-1000) | < 10% (200-1000) |
| % chalcopyrite (grain size m) | > 40% (500-1200) | < 10% (500-1200) | < 10% (500-1200) |
| paragenesis | hematite pyrite chalcopyrite | hematite pyrite chalcopyrite bornite | hematite pyrite chalcopyrite bornite |
| sieve texture pyrite | common | common | common |
| inclusions in pyrite | quartz, specularite, anhydrite | quartz, specularite, anhydrite, chalcopyrite, (bornite) | quartz, specularite, anhydrite |
| magnetite, sphalerite, galena | none | none | none |
| rhythmic layering | present | present | unknown |
| typical Cu grade (%) | 2.5 - 4 | 4 - 6 | no assay |
| typical Au grade (ppm) | > 1 | 1 | no assay |
| typical Ag grade (ppm) | 5 - 15 | 10 - 30 | no assay |
| non-opaque gangue | talc ± quartz | none ± local quartz | quartz, carbonate, chlorite |
| zoning in massive sulfide | barren core, high-grade near contacts with hematite-ores | barren core in large bodies, bornite-rich core in smaller bodies, chalcopyrite peripheral | barren core in large bodies, highest grade near core of smaller bodies |
| proximity to porphyry-hosted ore | < 300 m | > 300 m | < 2,000 m |
| alteration of feldspathic rocks | argillic (Rubright and Hart, 1968) | kaolinite, sericite, zunyite | kaolinite, pyrophyllite, sericite |
| temporal/spatial relationship to "prograde" skarn | cross-cuts skarn/ peripheral | cross-cuts skarn | no prograde skarn described in district |
| host rock | thinly-bedded silty limestone | clean, sparry dolostone | argillaceous "limestone" |
| direct replacement of carbonate | likely | yes | yes |