Riverside Consolidates Tenure at La Union Project and Reports High-Grade Gold, Including 59.4 g/t and 40 g/t Gold from Recent Sampling
October 06, 2021 at 07:00 AM EDT
Vancouver, British Columbia--(Newsfile Corp. - October 6, 2021) - Riverside Resources Inc. (TSXV: RRI) (OTCQB: RVSDF) (FSE: 5YY) ("Riverside" or the "Company") is pleased to report the mineral tenure consolidation and expansion of La Union Polymetallic Project in Sonora, Mexico. The acquisition of these additional concessions provides Riverside with an expanded land position and further control of the historical mines and old workings across the district. This consolidation through the acquisition of small internal concessions provides Riverside an option on the high-grade, previous small scale mine properties, internal to the larger surrounding 100% Riverside owned mineral concessions and increases the property total area to over 26 km2 (2,604 hectares). This transaction expands upon the original property acquired from Millrock's Mexico portfolio in 2019 (see press release of June 26, 2019).
La Union is located in western Sonora and is part of the orogenic gold trend. The old mining areas at La Union have seen very little drill testing and the broader structures are wide open for further regional exploration. Riverside is in contact with the local surface owners and knows the region from previous work with partner Hochschild Mining which allows Riverside to initiate exploration immediately.
Riverside's initial field work included selective rock sampling from abandoned mine workings and dumps with results returning up to 59.4 g/t Au and 833 g/t Ag (see Table 1). Further exploration work will begin shortly as the Company is pleased to have completed this expansion step, opening the door to follow up work.
La Union Polymetallic Project has been previously defined as a manto-chimney style deposit. The ongoing work has been demonstrating significantly high-grades in gold, silver, lead and zinc across mineralized areas identified. Near surface, the oxide gossan cap and carbonate replacement are particularly extensive with strong similarities with the Leadville polymetallic system in Colorado, USA. At La Union the Paleozoic carbonate stratigraphic section is a composite of over 1,000 m thick regionally and the mineralization of chimneys and mantos is open in multiple directions.
Table 1: Sample Results from La Union Polymetallic Project
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Riverside's President and CEO, John-Mark Staude: "We are excited to complete the acquisition of multiple key pieces of the project area at La Union, including the historic mines of Famosa and Plomito. Riverside is moving forward with growing projects, and generating exploration results at our properties, which continue to demonstrate the value of applying the Riverside property database and local team knowledge to capture and progress excellent mineral projects. The next steps for the La Union district will consist of field work and geophysics, which are expected to refine drilling targets."
Transaction Details for the Acquisition:
Geology and previous work at La Union Polymetallic Project:
Local historical productions in the 1950's mined high-grades averaging 7-20 g/t Au, 300 g/t Ag, 10-20% Pb and 5% Zn, for which mineralized bodies were traced for at least 80 m depth within oxides (Yantis, 1957). Since then, only small exploration programs followed and including Paget Mineral Exploration Company and Millrock with sampling programs yielding up to 22.5 g/t Au and multiple high-grade polymetallic samples over the project area. The presence of many high-grade areas, the thickness of the host rock and extent of the system across multiple known historic mines are favorable evidence for an extensive system.
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Geophysics and sampling will be additional tools deployed by Riverside in advancing the knowledge of this project, with a view to initiating a drill program that will allow the Project to extend high-grade at depth and define the limit of the oxide cap.
Qualified Person & QA/QC:
Rock samples from the exploration program discussed above at La Union were taken to the Bureau Veritas Laboratories in Hermosillo, Mexico for fire assaying for gold. The rejects remained with Bureau Veritas in Mexico while the pulps were transported to Bureau Veritas laboratory in Vancouver, BC, Canada for 45 element ICP/ES-MS analysis. A QA/QC program was implemented as part of the sampling procedures for the exploration program. Standard samples were randomly inserted into the sample stream prior to being sent to the laboratory.
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Certain statements in this press release may be considered forward-looking information. These statements can be identified by the use of forward-looking terminology (e.g., "expect"," estimates", "intends", "anticipates", "believes", "plans"). Such information involves known and unknown risks -- including the availability of funds, the results of financing and exploration activities, the interpretation of exploration results and other geological data, or unanticipated costs and expenses and other risks identified by Riverside in its public securities filings that may cause actual events to differ materially from current expectations. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this press release.
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