# Barksdale Continues to Delineate the Copper Porphyry System at Sunnyside, and Provides a Drilling and Results Update - Connecting the Upper and Lower Porphyry Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b Original source: https://money.tmx.com/en/quote/BRO/news/4545407569386316/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro Publisher: tmx Original announcement: 2026-07-20T11:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Barksdale Resources Corp. - Ticker: BRO - Exchange: TSX - Region: Southern Arizona - Primary commodity: Copper - Secondary commodities: Silver, Zinc, Lead, Gold, Manganese - Document categories: Drill results, Other - Extracted: 2026-08-23 02:24:07 UTC Narrative sentiment: -0.20 · Bearish ## Minestarters Atlas summary Barksdale reported assay results from 10 step-out reverse circulation holes at the Sunnyside copper-gold-silver project. While the results confirm a large-scale porphyry zonation pattern, the grades in these distal step-out zones are lower than the initial high-grade proximal intercepts. Reasoning: The results confirm the scale of the porphyry system but show that the recent step-out drilling \(600m+\) did not hit the high-grade core, instead finding a transition zone with lower copper and higher zinc/silver. - Positive factor: confirms continuous copper mineralization to 1,000m depth - Positive factor: identifies clear geochemical zonation patterns - Negative factor: step-out holes failed to duplicate high-grade proximal intercepts - Negative factor: declining copper grades in step-out zones Facts used in scoring: 9 ## Classification and evidence **Step-Out Extension** Polarity: positive Definition: Mineralization extended beyond the previously known limit. Why it applies: The company is drilling 200m to 650m away from the initial high-grade holes. Evidence · text > SUN26-005R to 014R, 200 m to 650 m away from the first four holes. **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: The release details specific QA/QC protocols including standards, blanks, and duplicates. Evidence · text > QAQC samples were inserted into the sample stream at a 6% overall ratio comprising 2% certified reference materials or standards, 2% blank material, and 2% field duplicates **Infill Drilling** Polarity: neutral Definition: Confirmatory drilling to raise resource confidence, not new discovery. Why it applies: The program includes confirmation holes surrounding high-grade intercepts. Evidence · text > sixteen 920-metre exploration and confirmation holes surrounding the high-grade chalcocite intercepts ## Extracted facts Stored fact records: 9. Some facts used in scoring do not have a stored record. ## Drill Results (9) ### SUN26-013R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-0) Sunnyside · copper #### Identity - Hole ID: SUN26-013R - Project: Sunnyside - Commodity: copper - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 0.3 - Grade Unit: % - Intercept: 77.7 m - From: 187.5 m - To: 265.2 m #### Classification - Sample Type: drill - Group ID: SUN26-013R:187.5-265.2 #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: 77.7m width is substantial, but 0.3% Cu is marginal for a copper porphyry. - Positive factor: significant width - Negative factor: low grade for porphyry Evidence · text > 0.3% Cu over 77.7 m from 187.5 m hole depth ### SUN26-013R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-1) Sunnyside · copper #### Identity - Hole ID: SUN26-013R - Project: Sunnyside - Commodity: copper - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 1.93 - Grade Unit: % - Intercept: 7.6 m - From: 187.5 m - To: 195.1 m #### Classification - Sample Type: drill - Group ID: SUN26-013R:187.5-195.1 #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: Strong high-grade intercept within a larger lower-grade zone. - Positive factor: high grade sub-interval Evidence · text > including 1.93% Cu over 7.6 m from 187.5 m in SUN26-013R ### SUN26-010R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-2) Sunnyside · copper #### Identity - Hole ID: SUN26-010R - Project: Sunnyside - Commodity: copper - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 0.32 - Grade Unit: % - Intercept: 12.2 m - From: 228.6 m - To: 240.8 m #### Classification - Sample Type: drill #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: 0.32% Cu is low grade for this deposit type. - Negative factor: low grade Evidence · text > 0.32% Cu over 12.2 m from 228.6 m hole depth in SUN26-010R ### SUN26-011R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-3) Sunnyside · copper #### Identity - Hole ID: SUN26-011R - Project: Sunnyside - Commodity: copper - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 0.3 - Grade Unit: % - Intercept: 4.6 m - From: 620 m - To: 624.6 m #### Classification - Sample Type: drill #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: Low grade and narrow intercept. - Negative factor: low grade - Negative factor: narrow width Evidence · text > 0.3% Cu over 4.6 m from 620 ft hole depth in SUN26-011R ### SUN26-007R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-4) Sunnyside · silver #### Identity - Hole ID: SUN26-007R - Project: Sunnyside - Commodity: silver - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 2 - Grade Unit: g/t - Intercept: 182.88 m - From: 5 m - To: 187.88 m #### Classification - Sample Type: drill #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: Extremely wide interval but very low silver grade. - Positive factor: very wide interval - Negative factor: low grade Evidence · text > 2.0 g/t Ag over 182.88 m from 5 m hole depth in SUN26-007R ### SUN26-012R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-5) Sunnyside · silver #### Identity - Hole ID: SUN26-012R - Project: Sunnyside - Commodity: silver - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 4.59 - Grade Unit: g/t - Intercept: 91.44 m - From: 15.2 m - To: 106.64 m #### Classification - Sample Type: drill #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: Moderate silver grade over a significant width. - Positive factor: wide interval Evidence · text > 4.59 g/t Ag over 91.44 m from a depth of 15.2 ### SUN26-012R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-6) Sunnyside · silver #### Identity - Hole ID: SUN26-012R - Project: Sunnyside - Commodity: silver - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 8.77 - Grade Unit: g/t - Intercept: 36.58 m - From: 18.3 m - To: 54.88 m #### Classification - Sample Type: drill #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: Higher grade silver sub-interval. - Positive factor: higher grade sub-interval Evidence · text > including 36.58 m grading 8.77 g/t Ag from a depth of 18.3 m in SUN26-012R ### SUN26-009R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-7) Sunnyside · silver #### Identity - Hole ID: SUN26-009R - Project: Sunnyside - Commodity: silver - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 1.62 - Grade Unit: g/t - Intercept: 111.25 m - From: 189 m - To: 300.25 m #### Classification - Sample Type: drill #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: Wide interval but low silver grade. - Positive factor: wide interval - Negative factor: low grade Evidence · text > 1.62 g/t Ag and 0.058 g/t Au over 111.25 m from 189 m hole depth in SUN26-009R ### SUN26-009R [Link to this fact](https://atlas-staging.minestarters.com/news/barksdale-continues-to-delineate-the-copper-porphyry-system-at-sunnyside-and-pro--fc852da2-ea47-4963-a72b-9868f6af978b#fact-drill-facts-8) Sunnyside · gold #### Identity - Hole ID: SUN26-009R - Project: Sunnyside - Commodity: gold - Region: usa\_az - Reported Region: Southern Arizona - Ticker: BRO #### Geometry - Grade: 0.058 - Grade Unit: g/t - Intercept: 111.25 m - From: 189 m - To: 300.25 m #### Classification - Sample Type: drill #### Review - Needs Review: No - Interp. Status: scored - Historical: No #### Dates - Event date: 2026-07-20T00:00:00.000Z Reasoning: Trace gold grade. - Negative factor: very low grade Evidence · text > 1.62 g/t Ag and 0.058 g/t Au over 111.25 m from 189 m hole depth in SUN26-009R ## 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.