VANCOUVER, BC, Oct. 19, 2021 /CNW/ - MANTARO SILVER CORP. (TSXV: MSLV) (FSE: 9TZ) (the "Company" or "Mantaro") is pleased to provide an exploration update on its advanced Golden Hill Property ("Golden Hill") located in the underexplored, orogenic Bolivian Shield, Bolivia.
- A total of four exploration geologists are at Golden Hill carrying out a concession-wide mapping and channel / rock-chip sampling program.
- La Escarcha mine shaft to be extended from the -45 m level to the -110 m level to permit further deeper access to the main quartz veins at the La Escarcha Mine.
- The existing high resolution magnetic to be extended the current high-resolution coverage over the entire concession.
- SGS (Canada) has commenced bench-scale metallurgical testing of a 200 kg sub-sample taken from an underground production face.
- High resolution satellite imagery with 31 cm/pixel visible resolution and high resolution radar imagery has been acquired and processed. This has provided a high resolution base map for regional field work and allowed generation of a 1 m digital elevation model.
- Mantaro to host webinar on Tuesday, October 19th, 2021, at 1 p.m. PT / 4 p.m. ET. See details below.
Exploration Activities at the Golden Hill Property
Mantaro has commenced an extensive concession wide mapping and channel / rock-chip sampling program at Golden Hill. The exploration program focuses on the broad north-south trending regional structure (see Figure 3) that hosts the La Escarcha mine and Gabby, the Garrapatillia and Brownfield workings and other gold-bearing vein occurrences in its western hanging wall. The same structure hosts numerous saprolite gold and hard rock gold deposits to the north and south of the Golden Hill concession over a strike length of at least 25 kilometers — underpinning the significant control the structure exerts on gold mineralization.
Mantaro CEO and chairman, Chris Wilson, stated, "Alluvial and saprolite workings at Golden Hill are more extensive than known hard-rock targets and underground workings, which suggests that gold mineralization along regional structures is more extensive than currently known. Defining the source of this alluvial and saprolitic gold will be an important focus of current field work as we continue to outline high priority drill targets for our first phase drill program on the project."
In conjunction with field mapping, Mantaro is extending the existing high resolution magnetic coverage to cover the whole concession. Magnetic data is fundamental to structural mapping and an essential component of effective target generation.
Planned UG Development
The Golden Hill Property is a fully permitted mining concession that has small scale production over the last few years. Production has been from shallow open pits focused on high grade quartz veins and from limited underground development at La Escarcha vein. This provides Mantaro significant strategic advantages.
- Production from open pits and underground development confirms the strong gold mineralized nature of many veins. The previous operators production records (unverified by Mantaro) suggests underground head grades of between 5 to 15 g/t Au over widths of 2 to 4 metres.
- The ability to access underground workings has provided Mantaro the opportunity to better understand the style and architecture of mineralization. Veins at La Escarcha are sub-vertical and multiphase.
- Underground access has also allowed Mantaro the opportunity of collecting bulk samples from production faces for bench-scale metallurgical test work.
The fact that Golden Hill is a fully permitted mining concession, provides Mantaro with exploration optionality, and the ability to immediately drill or explore via underground development. Diamond drilling is the preferred option for regional reconnaissance. However, exploration of known auriferous (such as La Escarcha) through underground development confers many advantages, including the ability to take bulk samples, map in the 3rd dimension, and channel sample at closer intervals than drilling.
Mantaro will be extending the La Escarcha mine shaft from –45 m level to the -110 m level allowing deeper access to the main quartz veins at the La Escarcha Mine. Mine staff have reported that gold grades and vein widths increase downwards from surface. A single shaft will allow development of cross drives which will provide access to the four main veins at La Escarcha — veins C2 and C3 which have been mined at shallow levels from underground, vein C4, and vein C5 which is presently being mined in a shallow open pit.
Bulk Metallurgical Sample
SGS (Canada) ("SGS") are currently conducting bench-scale metallurgical test-work on approximately 200 kg of underground material taken from a 5 tonne production blast on the -55 m level of the C2 vein at La Escarcha. Since the current mining operation at Golden Hill recoveries approximately 50% of gold through a simple gravity circuit, the initial focus of SGS will be a gravity recovery flow-path, followed by cyanidation of gravity concentrates and tails.
SGS are also running bench-scale tests on approximately 100 kg of tailings material from Golden Hill, with an emphasis on determining a representative head grade, and then passing tailings through gravity and cyanidation flow-paths.
Mantaro CEO and chairman, Chris Wilson, stated "Our ability to conduct bench-scale metallurgical tests, from a representative 5 tonne sample taken from a production blast of a typical vein at Golden Hill, allows us to fast track our understanding of the system. This has been done without the need to drill large diameter metallurgical diamond holes. The results of the metallurgy will have a direct bearing on the current small scale operations at Golden Hill."
Golden Hills Deposit Type
Greenstone-hosted or Abitibi/West African type orogenic gold deposits typically occur in clusters along major crustal structures and their associated splays — especially where they juxtapose rocks of differing competency contrasts. Regional-scale structures serve to focus mineralizing fluids — rocks of different composition focus regional stress and fracture to form space into which quartz, pyrite and gold is deposited. Zones of dilation at fault flexures are especially favorable locations.
The regional geological setting of Golden Hill shares many similarities with the more important greenstone-hosted gold deposits worldwide. Specifically, Golden Hill is located on a regional structure that hosts 5 other gold deposits and small-scales mines over a strike length of approximately 25 km. This confirms that the regional structure hosting Golden Hill has been a major conduit for gold mineralizing fluids.
At the project scale, preliminary structural mapping, indicates that Golden Hill is located within a zone of dilation — developed at a flexure in the regional fault system — that is at least 6 km long and up to 2 km wide. Within this zone there are a series of sub-parallel veins with a cumulative strike length of over 4 km. Another six kilometers of regional structures which shedding gold alluvials are the focus of the current mapping program.
Mantaro Silver Webinar
Tuesday, October 19th, 2021
1 p.m. PT/ 4 p.m. ET
Dr. Christopher Wilson, Ph. D., FAusIMM (CP), FSEG, a Qualified Person under National Instrument 43-101, has reviewed and approved the technical information contained in this news release.
About Mantaro Silver Corp.
Mantaro Silver Corp. is a British Columbia company that holds a diversified portfolio of gold and silver focused mineral properties in Bolivia and Peru. The Company's holds an option to acquire up to an 80% interest in the advanced Golden Hill Property ("Golden Hill"), located in the underexplored, orogenic Bolivia Shield, Bolivia.
The Company also has an 100% interest in high-grade Santas Gloria Silver Property as well as a 100% interest in the San Jose, La Purisima, Cerro Luque and Huaranay Properties (the "Silver Properties"). The Silver Properties are all located in Peru.
Information set forth in this news release contains forward-looking statements that are based on assumptions as of the date of this news release. These statements reflect management's current estimates, beliefs, intentions and expectations. They are not guarantees of future performance. The Company cautions that all forward looking statements are inherently uncertain and that actual performance may be affected by a number of material factors, many of which are beyond the Company's control. Such factors include, among other things: risks and uncertainties relating to Company's limited operating history and the need to comply with environmental and governmental regulations. Accordingly, actual and future events, conditions and results may differ materially from the estimates, beliefs, intentions and expectations expressed or implied in the forward looking information. Except as required under applicable securities legislation, the Resulting Issuer undertakes no obligation to publicly update or revise forward-looking information.
The forward-looking statements contained in this news release are made as of the date of this news release. Except as required by law, the Company disclaims any intention and assumes no obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise.
Neither the TSX Venture Exchange nor its Regulation Service Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
SOURCE Mantaro Silver Corp.