Riverside and Questcorp Drilling Advancing at Union Project with Three of Five Targets Progressed
MWN-AI** Summary
Riverside Resources Inc. (TSXV: RRI) has announced significant progress in its drilling program at the Union Project in Sonora, Mexico. As of September 24, 2025, the company revealed that three of the five primary targets have commenced drilling, meeting critical milestones within the schedule and budget. Drilling began following preparatory announcements in July and August of the same year.
John-Mark Staude, President and CEO, expressed enthusiasm regarding the program's advancement, which is expected to enhance their exploration model based on the geological data being collected. The initial focus has been on the Union Mine target, where drilling undertaken has intersected significant geological formations known to host past mineralization. Samples from these drill holes have been dispatched to Bureau Veritas for analysis, a consistent approach the company has adopted to ensure reliable results.
After completing the drilling at Union Mine, the program shifted to the El Cobre and North Union Mine areas, where results thus far have shown encouraging quartzite intersections associated with hematitic oxides, indicators of potential gold mineralization. The company's strategy includes evaluating the sulfide zones left untouched by historic mining, which only targeted the oxide minerals.
Looking ahead, Riverside plans to begin testing the Famosa target, where historical mining records indicate the potential for high-grade gold deposits. The company aims to integrate assay results with surface programs and further geological surveys to refine its exploration strategy.
Riverside maintains a solid financial position with no debt and a robust portfolio of mineral properties, further bolstered by its operational expertise in Mexico. The company is eager to advance its drilling initiatives as it anticipates further updates on assay results and ongoing exploration developments.
MWN-AI** Analysis
Riverside Resources Inc. (TSXV: RRI) is making significant progress at its Union Project in Sonora, Mexico, with three of five targeted drilling sites underway. This development is crucial for investors, as it indicates management’s efficiency in executing its exploration strategies while remaining on budget—a vital consideration in the resource sector, where cost overruns can severely impact project viability and shareholder confidence.
The geological findings at the Union Project, particularly the advanced structural analysis and mineralization indicators, suggest promising potential for gold and silver mineralization across multiple target areas, including the historically productive Famosa target. As drilling progresses, results from initial drilling are anticipated from these target zones, which could serve as a catalyst for stock price appreciation if the assay results are favorable.
Market watchers should pay attention to the assay results from Bureau Veritas, as these will be pivotal in defining the project's potential profitability. The integration of surface programs alongside ongoing drilling is expected to refine Riverside's exploration model. This systematic approach not only underlines declining operational risks but also positions Riverside advantageously for future exploration success.
Investors should consider the low share count and no debt on Riverside's balance sheet, providing a favorable capital structure. Given the attractive attributes of the sector as gold prices are expected to remain robust amidst inflationary concerns, Riverside appears well-positioned for growth.
For short-term traders, monitoring upcoming assay results and management updates will be important, while long-term investors might find Riverside's strategic positioning in a rich mining area and an experienced management team appealing. The current momentum suggests a constructive outlook for Riverside Resources as it drills deeper into its strategic targets at the Union Project.
**MWN-AI Summary and Analysis is based on asking OpenAI to summarize and analyze this news release.
Vancouver, British Columbia--(Newsfile Corp. - September 24, 2025) - Riverside Resources Inc. (TSXV: RRI) (OTCQB: RVSDF) (FSE: 5YY0) ("Riverside" or the "Company") is pleased to announce that drilling at the Union Project in Sonora, Mexico, is progressing on track and on budget, with three of the five main targets now having some initial drilling and work continuing toward completion of the current program. This update follows the Company's July 7, 2025 announcement outlining preparations for drilling and the August 6, 2025 news release marking the start of the program.
"We are pleased to see the Union Project drill program advancing on schedule and on budget, with key targets now being tested," commented John-Mark Staude, President and CEO of Riverside Resources. "The geological information we're gathering, the mineralization indicators, particularly the structural and stratigraphic details, is already refining our exploration model and setting us up for the next stages as the program moves ahead. We look forward to drilling the high-potential Famosa target and to receiving the assay results from the work completed so far as the Riverside team operates working with the drill company."
The first hole at the Union Mine target was drilled southeast beneath historic workings, cutting through the Clemente and Caborca formations, both key host units for past mining at Union as described in the NI 43-101 report on SEDAR+ filed on May 7, 2025, by Questcorp Mining (QQQ). The hole ended in the Caborca Formation, encountering the distinctive microconglomeratic carbonate unit that historically hosted mineralization at the bottom of the Union Mine. Samples from this hole have been delivered to Bureau Veritas in Hermosillo, Sonora, for gold fire assay, with pulps to be sent to Vancouver, Canada, for ICP-MS analysis with 4-acid digestion to determine silver, base metal, and multi-element values. This consistent analytical approach has been applied since the outset of the Union program to ensure comparability across results.
Drilling then moved to the northern part of the project, testing two target areas: the El Cobre Mine area and the North Union Mine area. Here, holes were oriented perpendicular to stratigraphy and toward interpreted feeder zones along pre-mineral fault structures, primarily within the Clemente Formation. Drilling in these areas has intersected more quartzite than initially modeled, with extensive hematitic oxides, an encouraging sign for potential gold mineralization, possibly linked to sulfides that have been oxidized through supergene weathering. Historic mining in the district targeted oxides only, leaving sulfide zones untested. Riverside plans to evaluate this potential beneath past workings across four target areas: Union Mine, El Cobre, North Union, and Famosa.
The program has now moved south to the Famosa target, where two initial holes are planned to test beneath and along strike from historic workings toward a steeply west-dipping, north-south-trending fault structure, as well as into host rocks on either side of this major structural feature. Famosa produced gold historically, with reported grades exceeding ½ oz/ton Au in archived records referenced in the NI 43-101 report. The Company is encouraged by the target's potential and is eager to advance drilling here.
Once this initial campaign is completed, follow-up work will integrate assay results, ongoing surface programs, additional induced polarization (IP) surveys, and refined geological interpretations based on stratigraphy and structure observed in drilling. The greater-than-expected quartzite content in the Clemente Formation supports the evolving model of fracture- and quartz-pyrite veinlet-hosted gold mineralization, which will help sharpen targeting at the Union Project. Core from all drilling has been logged, saw-cut, and half-core samples sent for assay, with remaining halves retained for reference and cataloging.
The Company looks forward to completing the Famosa drilling, receiving the pending assay results, and providing further updates as this program progresses.
Figure 1. Geologic map with the tenure of the Union internal concession shown in pink. Manto and chimney type CRD targets are shown as red polygons. Riverside now controls all mineral tenures on this map. The drill program will focus on the Union Mine and areas north of the Union Mine with the initial drill work.
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/6101/267702_3d2170133406b9a6_002full.jpg
Figure 2. Cross section looking west with conceptual drill targets and schematic drillhole traces. Assays from Riverside's sampling of rock dump materials from the two mine areas are labeled in black. Red areas are interpreted as manto and chimney target bodies that are now well defined and drill ready. Assays shown on figures 1 and 2 have been previously released and disclosed as summarized below the geochemical QA/QC and in published NI 43-101 Report that Questcorp published 2025 on Sedar+.
To view an enhanced version of this graphic, please visit:
https://images.newsfilecorp.com/files/6101/267702_3d2170133406b9a6_003full.jpg
Qualified Person & QA/QC:
The scientific and technical data contained in this news release pertaining to the Project was reviewed and approved by Freeman Smith, P.Geo, a non-independent qualified person to Riverside Resources Inc., who is responsible for ensuring that the information provided in this news release is accurate and who acts as a "qualified person" under National Instrument 43-101 Standards of Disclosure for Mineral Projects.
Rock samples from previous exploration programs discussed above at the Project 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 using 4-acid digestion methods. A QA/QC program was implemented as part of the sampling procedures for the exploration program. Standards were randomly inserted into the sample stream prior to being sent to the laboratory.
About Riverside Resources Inc.:
Riverside is a well-funded exploration company driven by value generation and discovery. The Company has a solid balance sheet with no debt and less than 75M shares outstanding with a strong portfolio of gold-silver and copper assets and royalties in North America. Riverside has extensive experience and knowledge operating in Mexico and Canada and leverages its large database to generate a portfolio of prospective mineral properties. Riverside has properties available for option, with information available on the Company's website at www.rivres.com.
ON BEHALF OF RIVERSIDE RESOURCES INC.
"John-Mark Staude"
Dr. John-Mark Staude, President & CEO
For additional information, contact:
| John-Mark Staude President, CEO Riverside Resources Inc. info@rivres.com Phone: (778) 327-6671 Fax: (778) 327-6675 Web: www.rivres.com | Eric Negraeff Corporate Communications Riverside Resources Inc. Eric@rivres.com Phone: (778) 327-6671 TF: (877) RIV-RES1 Web: www.rivres.com |
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 risk that the Transaction will not be completed as contemplates, or at all, 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.
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
To view the source version of this press release, please visit https://www.newsfilecorp.com/release/267702
FAQ**
How does Riverside Resources Inc. RRI:CC plan to address potential risks associated with their exploration process in Sonora, Mexico, in light of their drilling progress updates and financial position as stated in recent press releases?
What specific geological indicators have been identified by Riverside Resources Inc. RRI:CC to validate their exploration model for the Union Project, and how do these findings influence their future drilling plans?
In what ways does the assay procedure, particularly the transportation of pulps to Vancouver for ICP-MS analysis, enhance the reliability of the mineral exploration results reported by Riverside Resources Inc. RRI:CC?
Considering Riverside Resources Inc. RRI:CC's strong balance sheet and absence of debt, how might these financial factors impact future investment opportunities or partnerships related to their ongoing projects?
**MWN-AI FAQ is based on asking OpenAI questions about Riverside Resources Inc. (TSXVC: RRI:CC).
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