The Drum property is an early-stage exploration project, located in the Drum Mountains of west-central Utah. The property consists of 87 unpatented lode claims on land administered by the U.S. BLM and a State of Utah mineral lease. The claims are in near proximity to the Drum open pits which exploited disseminated, sediment-hosted gold deposits during the 1980’s. With the exception of small exploration pits and a shallow shaft developed on a vein/replacement-type manganese deposit, there are few indications of exploration on the claim block.
Five distinct targets have been identified on the basis of rock and soil geochemistry, and detailed geologic mapping. Each target is defined by gold-in-soil and gold-in-rock anomalies associated with outcropping, silicified limestone (“jasperoid”). Gold concentrations in rock chip samples of jasperoid are commonly anomalous and sub-gram, with a maximum value of 5.2 g/t (see links below for historical rock and soil sampling details).
Logan believes the Drum property to be under-explored and highly prospective for discovery of a sedimentary rock-hosted, “Carlin-type” gold system. It is a rare example of a recent grassroots gold discovery with multiple, undrilled targets at surface.
Logan has begun the process of permitting for a 15 hole, 2,150 meter RC drill program which will be conducted during the first half of 2017.
Location and Land Tenure
The Drum property is located in Millard County, west-central Utah, approximately 50 kilometers northwest of the community of Delta. The project is easily accessible from maintained gravel roads that extend west past the agricultural areas on the northwest side of Delta. A network of two-track dirt roads cross the claim block and provide direct access to three of the targets. The property consists of 87 unpatented lode claims on land administered by the U.S. BLM and a State of Utah mineral lease.
Geology and Alteration
Bedrock in the project area comprises a sequence of Lower and Middle Cambrian sedimentary units which strike northwest with moderate dips to the southwest. This sedimentary package is cut by monzonite dikes and locally overlain by Tertiary volcanic rocks.
Faulting is abundant across the Drum Mountains, with abundant evidence for both low-angle thrusts as well as east to northeast trending, high angle normal faults. Thrust faults are commonly sub-parallel to bedding and thus difficult to map but are responsible for local thinning and thickening of the stratigraphic section. High angle structures are intimately related to the distribution of jasperoid and Tertiary dikes; they are also implicated as feeders to gold mineralization.
Alteration within the claim block is limited to the silicification of limestone in jasperoid masses with local decalcification haloes. Rare surface exposures of monzonite dikes are strongly clay altered and decomposed.
The five exploration target areas differ in geologic setting but are all related to the presence of gold-bearing jasperoid outcrops.
- BAJ: down-dropped block of silicified, gold-bearing siltstone, rimmed to the north and east by prominent resistant outcrops of gold-bearing jasperoid. Rock-chip samples to 3.0 g/t Au, 200 x 200m gold-in-soil anomaly.
- PDS: gold-bearing jasperoid, silicified breccia, and strongly clay-altered rocks in a fault cutting limestone. Rock-chip samples to 5.2 g/t Au, 200m x 100m Au-in-soil anomaly.
- Mango: gold-bearing jasperoid crops out along northeast-striking, high-angle faults. Rock-chip samples to 1.7 g/t Au.
- GD-1: mineralized, high-angle fault zone with ribs and pods of gold-bearing jasperoid. Rock-chip samples to 3.8 g/t Au; discontinuous, 600 x 250m Au-in-soil anomaly.
- WSJ: discontinuous, elongate zone of gold bearing jasperoid along a probable west-northwest striking high-angle fault. Rock-chip samples to 0.13 g/t Au.
Although the Drum Mountains have been the site of sporadic metal exploration and production since 1872, it is the modern mining of disseminated, sediment-hosted gold that is most significant respect the Logan exploration program. Between 1984 and 1989, Western States Minerals Corporation produced approximately 85,000 ounces of oxide gold from ore that contained an average grade of 1.3 g/t Au (Krahulec, 2011)*. In the mine, disseminated gold occurs in Lower and Middle Cambrian strata, including the Tatow Member of the Pioche Formation, the Howell Limestone, and the Chisholm Limestone. The Western States mining project consisted of two distinct deposits, mined from separate pits, which are less than 1,000 meters to the northwest of Logan’s Mango target. With the exception of a possible drill pad on the west side of the BAJ exploration target area, there is little evidence of modern mineral exploration on the claim block.
Drum Project Property
Drum Project Geology
Logan has begun the process of permitting for a 15 hole, 2,150 meter RC drill program which is scheduled for the first half of 2017.
Dr. Craig Bow, Vice President Exploration of Logan, is a Qualified Person (“QP”) as defined by National Instrument 43-101. The QP is a member in good standing of the American Institute of Professional Geologists as a Certified Professional Geologist (CPG.). Dr. Bow has reviewed and is responsible for the technical information disclosed on the website relating to the USA Gold Projects.