The granite intrudes Archean and Lower-Middle Huronian rocks and is overlain unconformably by Upper Huronian sediments. The Duluth gabbro cut across and metamorphosed its southeastern ... The lateral ...

The hole began in the same leucocratic gabbro before transitioning at 45m into a gradually coarsening mafic-ultramafic intrusive with ... interval of the mafic rock with sulfides observed along ...

Drilling intersected 240m of leucocratic gabbro and 1-2% pyrite-pyrrhotite ... alongside similar mafic-ultramafic intrusive rock from 318m depth in Hole 2 shown in the lower photo.