Rimrock Gold Au-Ag, Carlin Trend, Nevada
RIMROCK Au-Ag Property, is north of Elko, Nevada. RIMROCK Au-Ag claims are directly on the Carlin Trend and also along the Midas-Hollister Gold Trends, adjoining the north side of the very high-grade Hollister Au-Ag Mine of Hecla Mining Company. Possibly commercial "IC Bentonite" deposit at the surface. The Rimrock property comprises 73 lode claims owned, for a total of 1,508 acres. RIMROCK IS AVALABLE FOR OPTION.
• Midas-Hollister Gold Trend produced ~ 3,000,000 ounces of very high-grade past Au-Ag mined. Initial ore reserves reported by Newmont and Great Basin Gold for these Au-Ag mines were at more than 1 ounce per ton gold and 5-12 ounces per ton silver. The Carlin Trend has +120M oz. Au.
• The Silver Hill target has a silica sinter body exposed at the surface. It has Midas/ Hollister-style Epithermal- and Carlin-style gold-silver targets, just north of the Hollister Mine property of Hecla Mining. Domed up Paleozoic Vinini Fm. upper plate rocks are exposed in an uplifted structural dome and at the SW Gold target. The Au-Ag ores mined at Hollister were in veins, mostly in Paleozoic rocks, except at the high-grade Gloria zone, which partly was
in overlying volcanic strata, as is SW Gold.
Shallow drilling by Kent Exploration in 2007 intersected gold, silver, and tungsten mineralization in Upper Plate Paleozoic basement, but SW Gold drillhole 2007-2 had Au-Ag-As mineralization in the volcano-sedimentary rocks, similar to the Gloria system. It was never tested at depth. The SW Gold is a main ore target at Rimrock.
Au-Ag-Tungsten mineralization at Silver Hill continues to the south into the Hollister Mine along the Velvet Fault system. The
tungsten likely is from a Cretaceous granitic tactite body at depth. These faulted granitic rocks and Paleozoic strata are good hosts for Carlin-style Au, as was mined at NGM's Betze Mine and at the Gold Acres Mine near Cortez. Epithermal Midas-Hollister veins Au-Ag system at Rimrock would overprint the Cretaceous (?) tactite, and could be with Eocene-age Carlin-style mineralizations, as a high-level Upper Plate type of Au-Ag mineralization.
• Dilation-Rhombochasm fault trend has Midas/ Hollister-style epithermal Au-Ag
mine targets in the NW area. The main
Rhombochasm Target is a complex 3.5 km fault zone that has a fault jog up to 100 meters has a mercury prospect in the fault jog. Au-Ag mineralization could be present at a 300 m depth. Only one 30 m deep drillhole was drilled previously, by Newmont Mining Corp in 1994; much too shallow to find Midas-style Au-Ag ores.
• The Silver Crown and Breccia targets are for fault- and breccia-hosted Midas-style epithermal gold-silver in the central part of the claims area. The Silver Crown NNW-trending system is an “ancient” (pre-Eocene) deep-tap fault zone that is in the prime NNW orientation to host Midas- and Carlin-style Au-Ag deposits.
• The IC Bentonite deposit occurs at the surface, and was trenched by entrepreneur John Torok before 2000. It was looked at by Halliburton several years ago. It could be a commercial bentonite deposit, ready for shipping to users in CA or NV.
CONCLUSION: Rimrock has excellent potential to host a multi-million ounce high-grade Au-Ag mine and a strippable bentonite deposit. Along with current
high Au-Ag prices, if an economic gold system can be delineated at Rimrock, it would give Hecla an additional reason to reopen the Hollister and Midas mines for new mine production.
 Rimrock_TARGETS_Claims_Faults_24July2024 |
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 Rimrock_Boundary_9July2024 |
 Rimrock_Hollister_14July2024 (1)Map showing CSAMT lines and inferred structure |
 Silver Hill Target_Geol_ProposedDrillholes |
 SWAuZone_14July2024 |
 Dilation Zone Au-Ag Target PlanA fault dilation jog shown in pink and red. Only tested by one 30 m deep RC drillhole. |
 Dilation Zone Au-Ag Target SectionA CSAMT survey showed a 100 m wide target here, never tested by drilling for open pit or underground Au-Ag mine targets |
 Ivanhoe Creek HotspotSatellite image showing Ivanhoe Creek target and past drilling of shallow holes. Is on a major N-S trending horst block. |
Rimrock Gold Property Figures
The RIMROCK Au-Ag property has 6 main target areas:
1) Silver Hill Zone: Fault-controlled and disseminated Ag-Au-W in Paleozoic Vinini Fm silty sands and quartzite hosts as little as 47m below surface. Multiple fault zones and veins/disseminations. Only 3 historic shallow drillholes into this zone with up to 262 g/t Ag (7.65 oz/ton Ag). Gold Mineralization could extend S into the Hollister Mine.
2) Silver Crown & Breccia Targets: 4 Km long Fault-controlled and disseminated Ag-Au targets in Vinini Fm silty sands and quartzite hosts as little as 47m below surface. Multiple ancient, pre-Eocene fault zones and veins/disseminations. Only 1 shallow drillhole near these zones.
3) SW Gold Zone: The southwestern extent of the Dilation zone, with several fault zones and targets. Hole 07-2 found gold and high-grade silver in overlying volcanic strata, and was terminated before hitting the main Paleozoic siltstone/quartzite ore host rocks below. This could be similar to ore found by Hecla in the Gloria Zone ores, which extended upward from the Paleozoic ore host rocks into the volcanic rocks.
4) Dilation-Rhombochasm: Midas-style epithermal gold-silver target in the north-western part of the property is a +8 Km long, to 100-meter-wide Rimrock Fault dilation zone target in a major Fault Jog that has mercury mineralization in the form of old mine pits directly at the ground surface, and is untested at depth by modern drilling.
The historic core drillholes by Kent Exploration had very poor core recoveries (as low as 15%), yet still found good precious metal values. These 2007 drillholes at Silver Hill need to be re-drilled deeper.