Preview SW Deposit
- Located approximately 40 km north-east of Laronge with access from HWY 102 and maintained local trail to deposit
- Located over 3 dispositions S-107154, S-107877, and S-107878 (843 Ha)
- Powerlines near property via Contact Lake deposit
- Community of Missinipi is located approximately 30 km North of the deposit
- Multiple Geophysical surveys have been conducted on the property since it’s discovery in 1934
- Preview SW has had multiple drill, sample and channel programs since 1939 with each new program showing more promising results
- Preview SW Deposit is split in multiple zones; Preview SW, Preview A, B, & C Zones, Clearwater A & B, and Preview North (Adit)
- Recently Updated the M.R.E. for the Preview SW Deposit
Deposit Information
- The area was first staked in 1937 by G. Gillies and were soon acquired by Preview Mines Ltd. In 1938. (Livingstone & Christian, 2017)
- Studer Mines Ltd. Then acquired the rights in 1949, which were then optioned by Westfield Minerals Ltd. In 1959
- Cameco acquiried the property 1979 and 1984. Under Cameco, extensive exploration and drilling programs were conducted all over the property untill 2004 when they returned the property to V. Studer
- La Ronge Gold Corp. (later changed to Select Sands Corp.) acquired the rights to the Preview Sw claims in 2011 and released a resource estimate the next year; At a base-case cut-off grade of 0.5 g/t Au the deposit was estimated to contain an Indicated Mineral Resource of 1.958 million tonnes grading 2.12 g/t Au and an Inferred Mineral Resource of 3.7 million tonnes grading 2.09 g/t Au (Simpson, 2016).
- In August of 2016, Comstock Metals Ltd. Acquired the Preview SW claims. Comstock released an updated resource in 2016: (Simpson, 2016)
- Mas Gold Corp. reached an agreement with Comstock metals in January of 2022 to acquire 100% of the Preview SW claims, with the sale completing March 31st, 2022 granting Mas Gold 100% ownership. (Mas Gold Corp & Comstock Metals, 2022)
- NI-43-101 Resource estimate updated in 2023 was able to increase the total Mineral Resource by 106,900 ounces Au from the previous Mineral Resource completed in 2016 (Louis F. Fourie, et al., 2023).
- Indicated: 5.457 MT @ 1.56 g/t Au equating to 273,000 (oz)
- Inferred: 5.852 MT @ 1.40 g/t Au equating to 263,000 (oz)
- The upgrade in the classification of the Mineral Resource is an important outcome of the 2017, 2018 and 2022 drilling programs that resulted from tighter drill spacing, strategic testing of both down dip continuity and the northeast strike extent of the deposit, and twinning of historical drill holes.
- The Preview SW Mineral Resources are constrained within an optimized pit shell with an overall average pit slope angle of 50°. A long-term gold price of US$1,700/oz was used, along with a metallurgical recovery of 90% and a cut off grade of 0.40 g/t Au (Louis F. Fourie, et al., 2023).
Deposit Highlights
- All zones of the deposit Au is structurally controlled and found in quartz veins located in and on the boundaries of sheared zones of the diorite sills.
- Multiple sub-parallel (1 – 10 m wide), NE trending structural shear zones run through the deposit and are persistent at depth. Dilatant structures (where two or more substructures meet) containing quartz in these shear zones directly relate to Au mineralization (Simpson, 2016)
- Arsenopyrite is the main sulphide associated with Au mineralization, others include Chalcopyrite, pyrite, pyrrhotite.
- Alteration increases as you move SW through the deposit, consisting primarily of biotite pseudomorphing hornblende and tourmaline creating biotite banding
Property Scale Geology
- Underlain by early Proterozoic metavolcanic and metasedimentary rocks which are intruded by ultramafic to diorite sills. This is believed to be related to the Contact Lake intrusion adjacent to deposit (Livingstone & Christian, 2017)
- Rocks in this area have been subjected to at least two folding events and are upper greenschist to lower amphibolite in metamorphic grade
- Diorite is the host rock in most of the zones within the deposit, ranging compositionally from quartz diorite to gabbro, but no correlation is seen between these phases and mineralization (Livingstone & Christian, 2017)
Completed Work (MAS)
- Completed a 5 hole (996 m) drill program in winter of 2022 on the Preview SW South and Adit zones.
- Upgraded Mineral Resource at the Preview SW Deposit using the 2017, 2018 and 2022 drill program results
Future Work / Plans
- Perform mapping and collect soils / channel samples to follow up on historic Au showings near the deposit in hopes to expand resource
- Complete the Scoping Study on the Preview SW Deposit by mid to late spring of 2023
Recent Drill Programs
Mas Gold Corp has been successful In executing our goal of upgrading the resource at the Preview SW Deposit through our recent drill program as well as Comstock Metals LTD’s 2017 and 2018 drill programs:
2017/2018: Drill holes PR17-169 through 171 were drilled at the northern end of the Preview SW deposit within
areas of limited or incomplete historic drilling and were designed to infill and test the down dip continuity of select drill sections, as well as test the northeast strike extent of the deposit. Holes drilled in the
southern half of the SW deposit were designed to test down-plunge (PR17-179) or up-plunge (PR17-180) of adjacent holes and to test for southwestern continuity of the eastern lodes, and to test the
southwest strike extent of the SW deposit (PR17-181,182).
2022: Drilling was successful in upgrading the M.R.E. through twinning of historic drill holes to confirm grades with robust QAQC protocols in place and strategic infill between existing drill holes
Ownership Overview
MAS Gold Corp. 100% Owned Properties occupy key positions at the transition between the La Ronge Domain and Kisseynew Domain. MAS Gold Corp has been active in La Ronge Gold Belt since 1990’s. Total MAS Gold Corp holdings: 33, 843 hectares (83, 628 acres). All properties are 100% owned.