The Marlin mine is in the western highlands of Guatemala, in the municipality of San Miguel Ixtahuacan, 25 kilometres west-southwest of the town of Huehuetenango, approximately 300 kilometres northwest of Guatemala City. It is in an area of moderate to steep terrain with elevations ranging from 1,800 to 2,300 metres above sea level.
The Marlin Mine lies within a highly prospective land package of approximately 100,000 hectares that encompasses the main Marlin deposit and other important vein structures and mineralized zones. There are four major lithologic units present at the Marlin site: pyroclastic deposits, marlin andesites, Tertiary volcaniclastic sequence and porphyric dykes.
The Marlin deposit occurs 15 kilometres south of the Cuilco-Chixoy-Polichic fault, a major transform fault that separates the North American and Caribbean tectonic plates. It is a district-scale, northwest-trending graben controlled deposition of greater than 1,200-metre-thick upper Tertiary quartz latite to rhyolite volcaniclastic sequence. These volcanics were subsequently intruded and unconformably overlain by a small intermediate, latite to andesite, volcanic complex. The deposit is classic low-sulfidation, quartz-calcite-adularia veins and stockwork host gold-silver mineralization in association with late-stage andesite dike swarms. The deposit is along a west-northwest striking normal fault on the eastern flank of the volcanic complex.