# Riverside Resources Intersects Near-Surface Gold and Base Metal Mineralization at Union Norte and Advances Multiple Targets for Phase 2B Drilling Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-a--3b6ff204-f257-4996-ae65-29d489521790 Original source: https://www.globenewswire.com/news-release/2026/09/09/3358329/0/en/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-at-union-norte-and-advances-multiple-targets-for-phase-2b-drilling.html Publisher: globenewswire Original announcement: 2026-09-09T00:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Riverside Resources Inc. - Ticker: RRI - Exchange: Unavailable - Region: Sonora, Mexico - Primary commodity: Gold - Secondary commodities: Silver, Copper, Lead, Zinc - Document categories: Drill results - Extracted: 2026-09-09 08:33:59 UTC Narrative sentiment: 0.60 · Bullish ## Minestarters Atlas summary Riverside Resources reported positive Phase 2A drill results from the Union Norte and Union Mine targets in Sonora, Mexico. The program intersected near-surface gold-equivalent mineralization and base metals, confirming the continuity of interpreted feeder structures. Reasoning: Positive near-surface gold and base metal intercepts at Union Norte confirm structural continuity, supported by robust QA/QC disclosure. - Positive factor: near-surface mineralization - Positive factor: continuity of feeder structure - Positive factor: QA/QC disclosed - Positive factor: positive base metal intercepts - Negative factor: true width unknown - Negative factor: drilling complications noted Facts used in scoring: 7 ## Classification and evidence **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: Release includes details on CRM, blanks, and field duplicates, with SGS as the analytical facility. Evidence · text > The Company's QAQC program includes certified reference materials \(CRMs\), field blanks, and field duplicates **Apparent Width Only** Polarity: negative Definition: Interval given as downhole width with no true width or drill orientation — apparent width may overstate true thickness. Why it applies: True thickness of mineralization is explicitly stated as unknown. Evidence · text > True thickness of mineralization is unknown **Mill Route** Polarity: neutral Definition: Processing via mill or concentrator \(CIL, CIP, tank leach, flotation\). Why it applies: the document describes a mill\_cil route \("CIL"\) ## Extracted facts Stored fact records: 7. Some facts used in scoring do not have a stored record. ## Drill Results (7) ### UND26-015 [Link to this fact](https://atlas-staging.minestarters.com/news/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-a--3b6ff204-f257-4996-ae65-29d489521790#fact-drill-facts-0) Union Norte · gold #### Identity - Hole ID: UND26-015 - Project: Union Norte - Commodity: gold - Region: mexico - Reported Region: mexico - Ticker: RRI #### Geometry - Grade: 0.45 - Grade Unit: g/t - Intercept: 14.6 m - From: 1 m - To: 15.6 m - Hole Depth: 69.6 m - Intercept Depth: 1 m #### Classification - Sample Type: drill - Group ID: UND26-015:1-15.6 - Mining Method: unknown #### Location - Location: Union Norte - Easting: 376169 - Northing: 3347610 - Elevation: 400 m - Azimuth: 320 ° - Dip: -70 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: SGS - QA/QC Disclosed: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Metal Equivalent - Metal Eq. Grade: 0.45 - Metal Eq. Unit: g/t Au Eq - Assumptions Disclosed: Yes #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au Eq #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-09T00:00:00.000Z Reasoning: Broad near-surface intercept confirming structure. - Positive factor: near-surface - Negative factor: low grade Evidence · text > UND26-015 at the Union Norte target returned 14.60 m of 0.45 g/t Au Eq starting at 1.0 m #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "An IP survey at the project included lines at Jabali and Luis Hill with targets delineated as chargeability highs for bo" ### UND26-015 [Link to this fact](https://atlas-staging.minestarters.com/news/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-a--3b6ff204-f257-4996-ae65-29d489521790#fact-drill-facts-1) Union Norte · gold #### Identity - Hole ID: UND26-015 - Project: Union Norte - Commodity: gold - Region: mexico - Reported Region: mexico - Ticker: RRI #### Geometry - Grade: 0.96 - Grade Unit: g/t - Intercept: 5.6 m - From: 8 m - To: 13.6 m - Hole Depth: 69.6 m - Intercept Depth: 1 m #### Classification - Sample Type: drill - Group ID: UND26-015:8-13.6 - Mining Method: unknown #### Location - Location: Union Norte - Easting: 376169 - Northing: 3347610 - Elevation: 400 m - Azimuth: 320 ° - Dip: -70 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: SGS - QA/QC Disclosed: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Metal Equivalent - Metal Eq. Grade: 0.96 - Metal Eq. Unit: g/t Au Eq - Assumptions Disclosed: Yes #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au Eq #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-09T00:00:00.000Z Reasoning: Stronger grade within the main intercept. - Positive factor: higher grade subset Evidence · table > 0.96 Context: 5.60 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "An IP survey at the project included lines at Jabali and Luis Hill with targets delineated as chargeability highs for bo" ### UND26-015 [Link to this fact](https://atlas-staging.minestarters.com/news/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-a--3b6ff204-f257-4996-ae65-29d489521790#fact-drill-facts-2) Union Norte · gold #### Identity - Hole ID: UND26-015 - Project: Union Norte - Commodity: gold - Region: mexico - Reported Region: mexico - Ticker: RRI #### Geometry - Grade: 1.09 - Grade Unit: g/t - Intercept: 4.6 m - From: 8 m - To: 12.6 m - Hole Depth: 69.6 m - Intercept Depth: 1 m #### Classification - Sample Type: drill - Group ID: UND26-015:8-12.6 - Mining Method: unknown #### Location - Location: Union Norte - Easting: 376169 - Northing: 3347610 - Elevation: 400 m - Azimuth: 320 ° - Dip: -70 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: SGS - QA/QC Disclosed: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Metal Equivalent - Metal Eq. Grade: 1.09 - Metal Eq. Unit: g/t Au Eq - Assumptions Disclosed: Yes #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au Eq #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-09T00:00:00.000Z Reasoning: Stronger grade within the main intercept. - Positive factor: higher grade subset Evidence · table > 1.09 Context: 4.60 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "An IP survey at the project included lines at Jabali and Luis Hill with targets delineated as chargeability highs for bo" ### UND26-015 [Link to this fact](https://atlas-staging.minestarters.com/news/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-a--3b6ff204-f257-4996-ae65-29d489521790#fact-drill-facts-3) Union Norte · gold #### Identity - Hole ID: UND26-015 - Project: Union Norte - Commodity: gold - Region: mexico - Reported Region: mexico - Ticker: RRI #### Geometry - Grade: 1.1 - Grade Unit: g/t - Intercept: 3 m - From: 9.6 m - To: 12.6 m - Hole Depth: 69.6 m - Intercept Depth: 1 m #### Classification - Sample Type: drill - Group ID: UND26-015:9.6-12.6 - Mining Method: unknown #### Location - Location: Union Norte - Easting: 376169 - Northing: 3347610 - Elevation: 400 m - Azimuth: 320 ° - Dip: -70 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: SGS - QA/QC Disclosed: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Metal Equivalent - Metal Eq. Grade: 1.1 - Metal Eq. Unit: g/t Au Eq - Assumptions Disclosed: Yes #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au Eq #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-09T00:00:00.000Z Reasoning: Stronger grade within the main intercept. - Positive factor: higher grade subset Evidence · table > 1.10 Context: 3.00 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "An IP survey at the project included lines at Jabali and Luis Hill with targets delineated as chargeability highs for bo" ### UND26-014 [Link to this fact](https://atlas-staging.minestarters.com/news/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-a--3b6ff204-f257-4996-ae65-29d489521790#fact-drill-facts-4) Union Norte · gold #### Identity - Hole ID: UND26-014 - Project: Union Norte - Commodity: gold - Region: mexico - Reported Region: mexico - Ticker: RRI #### Geometry - Grade: 0.76 - Grade Unit: g/t - Intercept: 9.1 m - From: 1.9 m - To: 11 m - Hole Depth: 63.5 m - Intercept Depth: 1.9 m #### Classification - Sample Type: drill - Group ID: UND26-014:1.9-11 - Mining Method: unknown #### Location - Location: Union Norte - Easting: 376169 - Northing: 3347610 - Elevation: 400 m - Azimuth: 30 ° - Dip: -70 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: SGS - QA/QC Disclosed: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Metal Equivalent - Metal Eq. Grade: 0.76 - Metal Eq. Unit: g/t Au Eq - Assumptions Disclosed: Yes #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au Eq #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-09T00:00:00.000Z Reasoning: Confirms structure along strike from UND26-015. - Positive factor: near-surface Evidence · text > UND26-014 at the Union Norte target returned 9.10 m of 0.76 g/t Au Eq from 1.90 m #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "An IP survey at the project included lines at Jabali and Luis Hill with targets delineated as chargeability highs for bo" ### UND26-014 [Link to this fact](https://atlas-staging.minestarters.com/news/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-a--3b6ff204-f257-4996-ae65-29d489521790#fact-drill-facts-5) Union Norte · gold #### Identity - Hole ID: UND26-014 - Project: Union Norte - Commodity: gold - Region: mexico - Reported Region: mexico - Ticker: RRI #### Geometry - Grade: 1.97 - Grade Unit: g/t - Intercept: 0.7 m - From: 1.9 m - To: 2.6 m - Hole Depth: 63.5 m - Intercept Depth: 1.9 m #### Classification - Sample Type: drill - Group ID: UND26-014:1.9-2.6 - Mining Method: unknown #### Location - Location: Union Norte - Easting: 376169 - Northing: 3347610 - Elevation: 400 m - Azimuth: 30 ° - Dip: -70 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: SGS - QA/QC Disclosed: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Metal Equivalent - Metal Eq. Grade: 1.97 - Metal Eq. Unit: g/t Au Eq - Assumptions Disclosed: Yes #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au Eq #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-09T00:00:00.000Z Reasoning: High grade near-surface intercept. - Positive factor: high grade subset Evidence · table > 1.97 Context: 0.70 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "An IP survey at the project included lines at Jabali and Luis Hill with targets delineated as chargeability highs for bo" ### UND26-014 [Link to this fact](https://atlas-staging.minestarters.com/news/riverside-resources-intersects-near-surface-gold-and-base-metal-mineralization-a--3b6ff204-f257-4996-ae65-29d489521790#fact-drill-facts-6) Union Norte · gold #### Identity - Hole ID: UND26-014 - Project: Union Norte - Commodity: gold - Region: mexico - Reported Region: mexico - Ticker: RRI #### Geometry - Grade: 3.38 - Grade Unit: g/t - Intercept: 1.5 m - From: 9.5 m - To: 11 m - Hole Depth: 63.5 m - Intercept Depth: 1.9 m #### Classification - Sample Type: drill - Group ID: UND26-014:9.5-11 - Mining Method: unknown #### Location - Location: Union Norte - Easting: 376169 - Northing: 3347610 - Elevation: 400 m - Azimuth: 30 ° - Dip: -70 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: SGS - QA/QC Disclosed: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks, duplicates #### Metal Equivalent - Metal Eq. Grade: 3.38 - Metal Eq. Unit: g/t Au Eq - Assumptions Disclosed: Yes #### Compositing - Cutoff Grade: 0.1 - Cutoff Unit: g/t Au Eq #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-09T00:00:00.000Z Reasoning: Very high grade subset at depth. - Positive factor: high grade subset Evidence · table > 3.38 Context: 1.50 #### Tags used in scoring **QA/QC Disclosed** Polarity: positive Definition: Release includes QA/QC disclosure — certified lab, QP sign-off, or stated methods \(blanks, standards, duplicates\). Why it applies: qaqc\_disclosed is true **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: proximity is offered as the value premise: "An IP survey at the project included lines at Jabali and Luis Hill with targets delineated as chargeability highs for bo" ## How Atlas produces this analysis Minestarters Atlas uses automated extraction to summarize mining announcements, identify reported measurements, and classify supporting evidence. Sentiment reflects the extracted narrative and classification rules; it is an interpretation, not a reported measurement. Evidence quotes and context are provided where available. Missing data, low-confidence results, and review flags indicate limitations. Check the original publisher announcement before relying on an interpretation.