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Drilling in Nevada
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Pyrite-rich breccia with sedimentary and rhyolite fragments.
Pyrite-rich breccia with sedimentary and rhyolite fragments affect lake sediments and adjacent rhyolite in a breccia zone in the Bell Springs pit. These and other textures suggest a small lake was present at Bell Springs which was affected by periodic hydrothermal eruptions in a high level epithermal setting.
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Silicified, spherulitic flow foliated rhyolite in Bell Springs pit.
Silicified, spherulitic flow foliated rhyolite in Bell Springs pit
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Clay alteration in Cottonwood Basin sediments below the Bell Springs pit.
Clay alteration in Cottonwood Basin sediments below the Bell Springs pit forms a rusty colour anomaly, potentially after pyrite.
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Partially reclaimed Bell Springs pit, looking southeast.
Partially reclaimed Bell Springs pit, looking southeast. Note intense white clay alteration of hosting rhyolite flow dome complex.
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Thinly bedded diatomaceous sediments in the Cottonwood Basin.
Thinly bedded diatomaceous sediments in the Cottonwood Basin. These become highly opal altered in areas of hydrothermal alteration.
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Opaline silica in altered Cottonwood Basin sediments at the Airport zone.
Opaline silica in altered Cottonwood Basin sediments at the Airport zone.
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Looking east from the Cottonwood Lake Basin.
Looking east from the Cottonwood Lake Basin. White lake sediments form the white ridge. The ridge may also be intruded by north-northwest trending rhyolite dykes which occur as float along the ridge tops. Margins of such dykes may potentially host gold mineralization. Hills in the background contain the historically mined pits.
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Flat topography in the Cottonwood Basin Lake sediments at the Airport zone.
Flat topography in the Cottonwood Basin Lake sediments at the Airport zone. The Airport deposit lies beneath this area in strongly opaline silica altered lake sediments associated with pyrite mineralization.
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View northwest into Cottonwood basin from the slopes adjacent to the previously mined pits.
View northwest into Cottonwood basin from the slopes adjacent to the previously mined pits. The white areas in the basin are exposures of lake sediments from a 14 to 16 million year old lake which filled the basin, and which occurred beside the rhyolite volcanic center that is associated with the previously mined mineralization at Hog Ranch. The Hog Ranch property extends into this area and encompasses prospects which occur in the lake sediments such as the Cameco and Airport zones, which may be associated with rhyolite dykes that intrude the lake sediments.
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Fault exploration target northwest of the Geib pit
Fault exploration target approximately 1.5 km northwest of the Geib pit, looking southeast. A northwest trending fault zone passes through the right of the photo, marked by a series of lineaments and disappearance of the resistant rhyolite to the right. The rhyolite here is intensely silicified in the outcrops above, and in the canyon below is affected by intense opaline silica, forming a large silicified zone that may lie above an upflow zone along the fault.
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Silicified tuff breccia unit.
Silicified tuff breccia unit forms a permeable flow unit between rhyolite flows which was locally preferentially silicified.
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