Riverside Resources Inc. and Questcorp Advance the La Union Project with Expanded Geophysics and Continued Drilling

The Canadian exploration firm Riverside Resources Inc. (TSX V: RVR) and its Mexican partner Questcorp Mining Inc. (CSE: QQQ) have announced the successful completion of a series of complementary geophysical programs at the La Union Project in Sonora, Mexico, and the ongoing expansion of their drilling campaign. The announcements, released simultaneously by GlobeNewswire, CEO.ca, and OTCMarkets, highlight the collaborative efforts to refine the target framework and accelerate resource discovery at a site that has shown promise for gold and base‑metal mineralization.

Expanded Drone Magnetic and IP Surveys

Under the joint‑venture arrangement, Riverside’s CEO, John‑Mark Staude, oversaw the deployment of a further 248 km of drone‑borne magnetic survey and an additional 8 km of induced‑polarization (IP) survey. The magnetic survey, conducted at 100 m line spacing, added 193 km of new lines to the existing baseline and 55 km of tie lines, while the IP survey extended the dataset from the four lines completed in 2025 to a total of twelve lines. Data processing is underway to interpret the results and to identify high‑grade targets that may exist along strike and at depth.

The new geophysical data have already begun to influence the drilling strategy. Initial holes in Phase 2 have focused on three key areas—Union, Union North, and Jabali—totaling 400 m of drill core, with further sampling underway at the Zacatecas laboratory. By integrating the expanded magnetic and IP datasets, the teams are able to:

  • Identify cross‑structures trending northeast and northwest that may correspond with feeder fault zones associated with carbonate‑replacement deposits (CRDs) and sediment‑hosted gold systems.
  • Place outcropping diorite bodies within a broader regional context, evaluating their potential scale and relationship to known gold‑zinc mineralized zones.
  • Improve imaging of subsurface structures beneath post‑mineral cover, including newly mapped northwest‑trending fault structures that could serve as ore controls or untested targets.

Strategic Impact on Exploration

“With the IP survey now complete, combined with the processed aeromagnetic data, we have an expanded view of the Union Project’s targets and structural framework, both at depth and along strike from current drilling,” said Staude. “Our teams are in the field continuing Phase 2 drilling, and this data is immediately helping us expand targeting and prioritize the project’s robust set of targets.”

The enhanced geophysical datasets provide a more robust and scalable framework for identifying high‑grade gold and base‑metal mineralization, mirroring the successful application of similar tools at large‑scale deposits in Arizona and Sonora. The ability to image potential ore‑source targets at depth and to contextualize surface geology within a mineralization framework positions the La Union Project as a compelling prospect for future development.

Company and Market Context

Riverside Resources, headquartered in Canada, specializes in exploring for minerals across Canada and Mexico. Listed on the TSX Venture Exchange, the company’s market capitalization stands at approximately CAD 25.7 million, with a 52‑week high of CAD 0.33 and a low of CAD 0.16. The stock closed at CAD 0.27 on July 7, 2026. With a price‑to‑earnings ratio of 17.09, investors view the company as an active play in the metals and mining sector.

The La Union Project continues to attract attention from the mining community, and the recent completion of the geophysical programs marks a significant milestone in Riverside and Questcorp’s joint‑venture strategy. As drilling advances and data interpretation progresses, the partnership aims to sharpen target definition and accelerate the identification of economically viable mineral resources.