# Silver Bow Mining Intersects Massive Sulfide Mineralization Grading 8.20% CuEq over 0.82 Meters at the Rainbow Block Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/silver-bow-mining-intersects-massive-sulfide-mineralization-grading-8-20-cueq-ov--370a6d1c-c9d5-48bc-aab9-f8103dbb065c Original source: https://www.silverbowmining.com/news/silver-bow-mining-intersects-massive-sulfide-mineralization-grading-820-cueq-over-082-meters-at-the-rainbow-block Publisher: prospectors\_exchange Original announcement: 2026-09-21T00:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: 2026-09-22T14:26:10.496Z Atlas analysis updated: 2026-09-22T14:26:10.496Z - Company: Silver Bow Mining Corp. - Ticker: SBMT - Exchange: Unavailable - Region: Montana - Primary commodity: Copper - Secondary commodities: Silver, Zinc - Document categories: Drill results - Extracted: 2026-09-22 14:26:11 UTC Narrative sentiment: 0.70 · Bullish ## Minestarters Atlas summary Silver Bow Mining has reported a high-grade intersection of 8.20% CuEq over 0.82 meters in drill hole SBM26-09 at the Rainbow Block Project in Montana. The intercept, located on the Black Rock Copper Vein, sits approximately 30 meters below a historical unmined copper-silver block identified in 1978 Anaconda records. Reasoning: The intercept of 8.20% CuEq is strong for a vein-hosted system, and its location below a known historical unmined block provides significant geological validation, though narrow width and recovery issues limit immediate certainty. - Positive factor: High-grade CuEq intercept - Positive factor: Consistent with historical Anaconda records - Positive factor: Located below unmined historical block - Negative factor: Narrow intercept width - Negative factor: Uncertain true width due to low core recovery in overlying interval - Negative factor: Assays for other vein systems still pending Facts used in scoring: 5 ## 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 mentions systematic insertion of blanks and certified reference materials and an ISO 17025 accredited lab. Evidence · text > includes the systematic insertion of blanks and certified reference materials **Nearology Play** Polarity: neutral Definition: Value premise rests on proximity to a known deposit rather than own results. Why it applies: The intercept is positioned immediately below a historical unmined copper-silver block from Anaconda records. Evidence · text > located approximately 30 meters \(98 feet\) below a copper-silver block shown as unmined in Anaconda’s historical ## Extracted facts Stored fact records: 5. Some facts used in scoring do not have a stored record. ## Drill Results (5) ### SBM26-09 [Link to this fact](https://atlas-staging.minestarters.com/news/silver-bow-mining-intersects-massive-sulfide-mineralization-grading-8-20-cueq-ov--370a6d1c-c9d5-48bc-aab9-f8103dbb065c#fact-drill-facts-0) Rainbow Block · copper #### Identity - Hole ID: SBM26-09 - Project: Rainbow Block - Commodity: copper - Region: usa\_mt - Reported Region: usa\_mt - Ticker: SBMT #### Geometry - Grade: 6.22 - Grade Unit: % - Intercept: 0.82 m - From: 662.15 m - To: 662.97 m - Hole Depth: 664.65 m - Intercept Depth: 662.15 m #### Classification - Sample Type: drill - Group ID: SBM26-09:662.15-662.97 - Mining Method: underground #### Location - Location: Black Rock Copper Vein - Easting: 382070 - Northing: 5098822 - CRS: WGS84 UTM Zone 12N - Elevation: 6209 m - Azimuth: 14 ° - Dip: -57 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: American Analytical Services \(AAS\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks #### Metal Equivalent - Metal Eq. Grade: 8.2 - Metal Eq. Unit: % CuEq - Assumptions Disclosed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-21T00:00:00.000Z Reasoning: 6.22% Cu is a strong grade for a vein-hosted massive sulfide. - Positive factor: High grade Evidence · table > 6.22 Context: 0.82 #### 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 **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ### SBM26-09 [Link to this fact](https://atlas-staging.minestarters.com/news/silver-bow-mining-intersects-massive-sulfide-mineralization-grading-8-20-cueq-ov--370a6d1c-c9d5-48bc-aab9-f8103dbb065c#fact-drill-facts-1) Rainbow Block · silver #### Identity - Hole ID: SBM26-09 - Project: Rainbow Block - Commodity: silver - Region: usa\_mt - Reported Region: usa\_mt - Ticker: SBMT #### Geometry - Grade: 207.1 - Grade Unit: g/t - Intercept: 0.82 m - From: 662.15 m - To: 662.97 m - Hole Depth: 664.65 m - Intercept Depth: 662.15 m #### Classification - Sample Type: drill - Group ID: SBM26-09:662.15-662.97 - Mining Method: underground #### Location - Location: Black Rock Copper Vein - Easting: 382070 - Northing: 5098822 - CRS: WGS84 UTM Zone 12N - Elevation: 6209 m - Azimuth: 14 ° - Dip: -57 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: American Analytical Services \(AAS\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks #### Metal Equivalent - Metal Eq. Grade: 8.2 - Metal Eq. Unit: % Cu-Eq - Assumptions Disclosed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-21T00:00:00.000Z Reasoning: 207.1 g/t Ag is a significant byproduct grade in this copper intercept. - Positive factor: Strong silver grade Evidence · table > 207.1 Context: 0.82 #### 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 **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ### SBM26-09 [Link to this fact](https://atlas-staging.minestarters.com/news/silver-bow-mining-intersects-massive-sulfide-mineralization-grading-8-20-cueq-ov--370a6d1c-c9d5-48bc-aab9-f8103dbb065c#fact-drill-facts-2) Rainbow Block · zinc #### Identity - Hole ID: SBM26-09 - Project: Rainbow Block - Commodity: zinc - Region: usa\_mt - Reported Region: usa\_mt - Ticker: SBMT #### Geometry - Grade: 0.27 - Grade Unit: % - Intercept: 0.82 m - From: 662.15 m - To: 662.97 m - Hole Depth: 664.65 m - Intercept Depth: 662.15 m #### Classification - Sample Type: drill - Group ID: SBM26-09:662.15-662.97 - Mining Method: underground #### Location - Location: Black Rock Copper Vein - Easting: 382070 - Northing: 5098822 - CRS: WGS84 UTM Zone 12N - Elevation: 6209 m - Azimuth: 14 ° - Dip: -57 ° - Loc. Confidence: high - Loc. Source: document #### QA/QC - Laboratory: American Analytical Services \(AAS\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks #### Metal Equivalent - Metal Eq. Grade: 8.2 - Metal Eq. Unit: % Cu-Eq - Assumptions Disclosed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-21T00:00:00.000Z Reasoning: 0.27% Zn is a minor trace component in this intercept. Evidence · table > 0.27 Context: 0.82 #### 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 **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ### SBM26-09 [Link to this fact](https://atlas-staging.minestarters.com/news/silver-bow-mining-intersects-massive-sulfide-mineralization-grading-8-20-cueq-ov--370a6d1c-c9d5-48bc-aab9-f8103dbb065c#fact-drill-facts-3) Rainbow Block · copper #### Identity - Hole ID: SBM26-09 - Project: Rainbow Block - Commodity: copper - Region: usa\_mt - Reported Region: usa\_mt - Ticker: SBMT #### Geometry - Grade: 6.22 - Grade Unit: % - Intercept: 2.7 m - From: 2172.4 m - To: 2175.1 m - Intercept Depth: 2172.4 m #### Classification - Sample Type: drill - Group ID: SBM26-09:2172.4-2175.1 - Mining Method: underground #### Location - CRS: WGS84 UTM Zone 12N #### QA/QC - Laboratory: American Analytical Services \(AAS\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks #### Metal Equivalent - Metal Eq. Grade: 8.2 - Metal Eq. Unit: % Cu-Eq - Assumptions Disclosed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-21T00:00:00.000Z Reasoning: Expanded from assay table. 6.22 % copper is exceptional against the default band \[2.5, 1, 0.5, 0.25\] %. Grade×width 16.8 %·m is below \(grade alone is exceptional; the better of the two is used\). - Positive factor: 6.22 % copper is exceptional on the default band. - Negative factor: Scored from rubric bands during table expansion, not from document context. Evidence · table > 6.22 Context: SBM26-09 #### 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 **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ### SBM26-09 [Link to this fact](https://atlas-staging.minestarters.com/news/silver-bow-mining-intersects-massive-sulfide-mineralization-grading-8-20-cueq-ov--370a6d1c-c9d5-48bc-aab9-f8103dbb065c#fact-drill-facts-4) Rainbow Block · zinc #### Identity - Hole ID: SBM26-09 - Project: Rainbow Block - Commodity: zinc - Region: usa\_mt - Reported Region: usa\_mt - Ticker: SBMT #### Geometry - Grade: 0.27 - Grade Unit: % - Intercept: 2.7 m - From: 2172.4 m - To: 2175.1 m - Intercept Depth: 2172.4 m #### Classification - Sample Type: drill - Group ID: SBM26-09:2172.4-2175.1 - Mining Method: underground #### Location - CRS: WGS84 UTM Zone 12N #### QA/QC - Laboratory: American Analytical Services \(AAS\) - QA/QC Disclosed: Yes - Lab Certified: Yes - QP Signed: Yes - QA/QC Methods: standards, blanks #### Metal Equivalent - Metal Eq. Grade: 8.2 - Metal Eq. Unit: % Cu-Eq - Assumptions Disclosed: Yes #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-09-21T00:00:00.000Z Reasoning: Expanded from assay table. 0.27 % zinc is below against the default band \[18, 10, 5, 2\] %. Grade×width 0.7 %·m is below. - Negative factor: 0.27 % zinc is below the weak threshold \(2 %\) on the default band. - Negative factor: Scored from rubric bands during table expansion, not from document context. Evidence · table > 0.27 Context: SBM26-09 #### 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 **Cut-off Undisclosed** Polarity: negative Definition: High-grade interval reported without stating the cut-off grade used for compositing. Why it applies: no cutoff\_grade was stated ## 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.