The Crown Block of deposits is part of an assembled land package that for the first time has been consolidated with the Sterling Mine under one ownership. The Crown hosts three deposits – Daisy, Secret Pass, and SNA. Mineralization follows the same detachment fault structure that hosted Barrick’s Bullfrog Mine which produced ~2.3 million ounces of gold at an average grade of 3.2 g/t.
The Historic Daisy Mine, which was comprised of the Daisy pit, Secret Pass pit, and Mother Lode pit was in production from 1997 to 2001 and produced 104,000 ounces of gold. It was shut down due to sharply declining gold prices and has since been fully reclaimed. Northern Empire’s three deposits in the Crown host an NI 43-101 compliant, inferred resource of 693,000oz at 1.06 g/t gold at a 0.3 g/t cut-off*. Drilling, surface mapping and sampling on the property suggests that the historic deposits are open for expansion and there is potential for new discoveries.
The Daisy Deposit is located in the footwall of the Fluorspar Canyon detachment fault and is the westernmost of the known deposits within the Fluorspar Canyon Trend. It is a sediment-hosted gold deposit with a Carlin-type geochemical signature. The Daisy Deposit contains an inferred resource of 232,000 oz of gold at an average grade of 1.47 g/t Au. Recent drilling by Northern Empire is highlighted by D18-003C which returned 125 meters of 1.4 g/t gold and D17-002 which returned 47 meters of 1.47 g/t Au. Cyanide solubility assays averaged 90% of these fire assay numbers, indicating the Daisy deposit may be amenable to open pit mining with heap leach recovery of gold. Additional holes will be drilled at Daisy as part of the current 15,000 meter program.
The Secret Pass Deposit was a past producing open pit, heap leach gold mine and currently hosts an inferred resource of 335,000 oz grading 0.93 g/t Au at a 0.3 g/t cut-off*. Secret Pass is an epithermal deposit hosted within Tertiary Volcanics (Bullfrog Tuff) in the hanging wall of the Fluorspar Canyon Detachment fault. The Company is currently focused on drilling to the west and east and mapping the structural corridor to the south of the Secret Pass Deposit, as gold mineralization appears to be open in all directions.
The Secret Pass Deposit is similar to the past producing Bullfrog Mine located 12 km to the west, and the Mother Lode Mine located 3.4 km to the northeast. From 1989 through 1999, the Barrick Bullfrog Mine produced a total of 2,313,643 ounces of gold and 3,026,451 ounces of silver**. The Secret Pass Deposit is located approximately 1.8 km to the northeast of the Daisy deposit. Recent drilling at Secret Pass is highlighted by SP18-003C which returned 70 meters of 1.8 g/t gold. Cyanide solubility assays averaged 95% of the reported fire assays in the upper oxide portion of this hole. This was the first of 13 planned holes at Secret Pass in 2018.
The SNA deposit is the easternmost of the 3 deposits controlled by the Company within the Fluorspar Canyon Trend. The SNA Deposit is an inferred resource totalling 126,000 oz grading 1.03 g/t Au at a 0.3 g/t gold cut-off*. SNA is described as a Carlin-Type deposit hosted within Devonian Carbonates in the footwall of the Fluorspar Canyon Detachment Fault.
The SNA deposit is located approximately 400 meters to the south of the past producing Mother Lode pit, and may represent a southern extension of that mineralization. The SNA deposit is located approximately 4.6 km to the northeast of the Daisy Deposit and 3.3 km northeast of the Secret Pass Deposit
* Please refer to the technical report on the Sterling Project dated July 12, 2017, found on the Company’s website and SEDAR.
** Sourced from USGS Mineral Resources Data System.