An example of the contrast between unaltered, well banded quartz diorite orthogneiss in drill hole DS-18-001 at Denio Summit (top), and the same orthogneiss unit in drill hole GR-18-001 at Granite Mountain (bottom) with complete textural destruction by calc-potassic alteration, with hydrothermal magnetite and recrystallization of feldspar, quartz and biotite. HQ drill core.
An example of the contrast between unaltered, well banded quartz diorite orthogneiss in drill hole DS-18-001 at Denio Summit (top), and the same orthogneiss unit in drill hole GR-18-001 at Granite Mountain (bottom) with complete textural destruction by calc-potassic alteration, with hydrothermal magnetite and recrystallization of feldspar, quartz and biotite. HQ drill core.