Since the Sterling Gold Project was acquired in May of 2017, the Company has been working to develop and deepen its understanding of the regional geological model and structural controls for gold mineralization around existing deposits, and across the vast land package. Early work led to the identification of highly prospective units of host rock available for staking and the Company subsequently grew the land package from its original size of 55 square-kilometers to its current size of 141 square-kilometers.
Mapping in the Crown has defined an asymmetric fold-thrust belt in the sediment package, with a NW vergence and a NE plunge likely of Mississippian age (327-290Ma). The folding generated flexure induced failures (parallel to axial direction), and bedding plane weaknesses (low angle, grossly at 90 degrees to axial direction) that induced near north-south oriented tear faults that were later enhanced during caldera collapse to the north. These late (15-7Ma) caldera collapse events released stress on the pre-existing framework allowing fluid migration paths along both the low angle bedding slip induced failure zones, and the more vertical standing tears (N-S) and axial plane (NE-SW) slips.
The strong NE fabric generated during the compressional folding event is thought to have created the underlying structural architecture that may be responsible for the NE alignment of the known deposits along the Fluorspar Canyon trend. This fundamental understanding and the relation of this fabric to the subsequent structural events will help in the location of additional mineralized areas within the Bare Mountains. A detailed geology map can be found in Figure 1.
Of 580 samples collected up until April of 2018, 34 returned values greater than 1.0 g/t Au and ranged from less than detection, to a high of 13.85 g/t Au. Additional samples are being processed and may result in further near-surface targets being developed.
With the existing data, several highly prospective, near-surface targets for new discoveries have been identified and will begin to be tested in the Company’s recently expanded 18,000-meter drill program. Permitting for a more significant 50,000-meter program has already begun and will focus not only on upgrading resources at the Crown, but also testing more of these exciting new regional targets.
New Exploration Targets:
- Road Zone: Located north of the Daisy deposit and features several up-dip surface samples of greater than 1.0 g/t gold which indicates potential for shallow mineralization. This target is on the northern limb of the regional antiform identified, in mapping.
- Gold Ace Fault: The Gold Ace Fault is a north-south running structure that hosts the Company’s Daisy deposit as well as the Reward deposit. The new Gold Ace Fault target zone is immediately south/updip of the Daisy deposit and features a large undrilled area of high-grade surface samples, up to 13.85 g/t Au and is located on the southern limb of the regional antiform as well as along a secondary syncline.
- Crowell Extension: The Crowell Mine is a historic, underground fluorite mine that had reported gold grades of up to 7.0 g/t (0.2 opt). This target is located along the hinge of the regional antiform and represents a potential link between the Daisy and Secret Pass deposits. This target has a strike length of approximately 800 meters.
- Radio Tower: Anomalous surface geochemistry to the south of the Secret Pass pit indicate a possible target at depth.
- Secret Pass East: Secret Pass is currently the largest deposit in the Crown and the new East zone is an under-explored portion of the Fluorspar detachment fault. Surface sampling by the Company has returned values of up to 5.0 g/t gold. This target represents a potential strike length of approximately 1,200 meters.
- Ronko Jasperoids: Undrilled Jasperoids that returned sample values of up to 2.0 g/t gold at surface and are in excellent host rocks for mineralization. Strike length of the jasperoids mapped to date is approximately 500 meters.
- Range Front Fault Zone: The range front fault running along the eastern side of the land package is a sizeable untested target that hosts large deposit potential. Historic samples returned values of up to 5.0 g/t gold at surface on secondary structures. Portions of the range front fault complex cut the Roberts Mountain and Lone Mountain formation and represent an excellent target for Carlin-style mineralization. Range front structures host 3 deposits on the eastern side of the Bare Mountain Range; Motherlode, SNA and the 144 Zone.
Identified in the regional geology map is the asymmetric Razorback Anticline in section view to the northeast (Figure 4). The steeply dipping northern limb is fractured by bedding plane shears and axial plane faults, which trend down the plunge of the fold to the northeast. The other significant fault shown on the section is the Fluorspar Canyon Detachment fault, as it is currently known, separating Tertiary volcanic rocks from the Cambro-Ordovician sedimentary rock package. Recent drilling has shown that many more northward-dipping low-angle features are present, but not yet defined within the Cambrian Carrara carbonate package, which hosts mineralization at Daisy South.
Also identified in the regional geology map is a section view to the northwest from the Secret Pass area through Meiklejohn Peak to the SNA deposit (Figure 5). The lower part of the section shows detachment surfaces, possibly reactivated thrust faults, which place Cambrian Zabriskie Quartzite over Mississippian Eleana Siliciclastic rocks, and Ordovician Carbonates over Devonian and Mississippian rocks. The Detachment surface extends to the northeast toward the center of the Timber Mountain Volcanic Complex collapse, causing multiple slide blocks to develop along listric-normal faults. Tertiary latite dikes are intruded along some of the older features, which strike north and northeast. Tertiary latite dikes are also found within the Devonian and younger rocks that contain the SNA deposit.
Certain scientific and technical information relating to the Sterling Gold Project contained in this website is derived from, and in some instances is an extract from, the report entitled “Technical Report - Sterling Property, Nye County, Nevada, USA: A Property Under Option to Purchase by Northern Empire” with an effective date of March 29, 2017 (the “Sterling Technical Report”) prepared for in accordance with National Instrument 43-101 – Standards of Disclosure for Mineral Projects (“NI 43-101”).
Scientific and technical information in this website has been reviewed, approved and verified by Michael G. Allen, P. Geo., President of Northern Empire, and a qualified person as defined by NI 43-101.
Reference should be made to the full text of the Sterling Technical Report, which has been filed with certain Canadian securities regulatory authorities pursuant to NI 43-101 and is available for review under the company’s profile on SEDAR at www.sedar.com.