# Regulus Announces Delivery of Phase Two Metallurgical Samples to Nuton LLC, a Rio Tinto Venture Canonical Atlas analysis: https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2 Original source: https://money.tmx.com/en/quote/REG/news/8546515381378094/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio Publisher: tmx Original announcement: 2023-11-07T12:00:00.000Z Analysis by Minestarters Atlas Atlas analysis published: Unknown date Atlas analysis updated: Unknown date - Company: Regulus Resources Inc. - Ticker: REG - Exchange: TSX - Region: Peru - Primary commodity: Copper - Secondary commodities: Gold, Silver - Document categories: Metallurgy - Extracted: 2026-08-24 08:36:25 UTC Narrative sentiment: 0.40 · Bullish ## Minestarters Atlas summary Regulus Resources has delivered eight composite metallurgical samples to Nuton LLC, a Rio Tinto venture, to commence phase two testing. The program will utilize proprietary sulphide leaching technologies to refine recovery expectations across high sulphidation, skarn, and porphyry mineralization styles. Reasoning: The delivery of samples to a Rio Tinto venture for advanced sulphide leaching testing is a significant de-risking step for the AntaKori project, though results are not immediate. - Positive factor: Advancement to phase two metallurgical testing - Positive factor: Partnership with Rio Tinto venture \(Nuton\) - Positive factor: Use of proprietary sulphide leaching technology - Negative factor: Long lead time for results \(approx. one year\) Facts used in scoring: 24 ## Classification and evidence No classification tags are available. ## Extracted facts Stored fact records: 24. Some facts used in scoring do not have a stored record. ## Metallurgical Results (24) ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-0) copper #### Identity - Commodity: copper - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-17-003A RTP2-VO-A High Sulphidation #### Recovery - Head Grade: 0.95 - Head Grade Unit: % #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. - Negative factor: High arsenic content \(3,275 ppm\) Evidence · table > 0.95 Context: 191.3 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-1) gold #### Identity - Commodity: gold - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-17-003A RTP2-VO-A High Sulphidation #### Recovery - Head Grade: 0.46 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.46 Context: 191.3 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-2) silver #### Identity - Commodity: silver - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-17-003A RTP2-VO-A High Sulphidation #### Recovery - Head Grade: 8.4 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 8.4 Context: 191.3 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-3) copper #### Identity - Commodity: copper - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-024 RTP2-VO-B High Sulphidation #### Recovery - Head Grade: 0.71 - Head Grade Unit: % #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. - Negative factor: High arsenic content \(2,428 ppm\) Evidence · table > 0.71 Context: 219.2 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-4) gold #### Identity - Commodity: gold - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-024 RTP2-VO-B High Sulphidation #### Recovery - Head Grade: 0.12 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.12 Context: 219.2 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-5) silver #### Identity - Commodity: silver - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-024 RTP2-VO-B High Sulphidation #### Recovery - Head Grade: 4.1 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 4.1 Context: 219.2 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-6) copper #### Identity - Commodity: copper - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-VO-C High Sulphidation #### Recovery - Head Grade: 1.79 - Head Grade Unit: % #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: High grade sample but significant penalty element risk. - Positive factor: Strong copper grade - Negative factor: Very high arsenic content \(7,515 ppm\) Evidence · table > 1.79 Context: 146.2 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-7) gold #### Identity - Commodity: gold - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-VO-C High Sulphidation #### Recovery - Head Grade: 3.59 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: High grade sample. - Positive factor: Strong gold grade Evidence · table > 3.59 Context: 146.2 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-8) silver #### Identity - Commodity: silver - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-VO-C High Sulphidation #### Recovery - Head Grade: 22.6 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: High grade sample. - Positive factor: Strong silver grade Evidence · table > 22.6 Context: 146.2 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-9) copper #### Identity - Commodity: copper - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-VO-D High Sulphidation #### Recovery - Head Grade: 1.53 - Head Grade Unit: % #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. - Negative factor: High arsenic content \(4,283 ppm\) Evidence · table > 1.53 Context: 228.7 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-10) gold #### Identity - Commodity: gold - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-VO-D High Sulphidation #### Recovery - Head Grade: 3.78 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: High grade sample. - Positive factor: Strong gold grade Evidence · table > 3.78 Context: 228.7 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-11) silver #### Identity - Commodity: silver - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-VO-D High Sulphidation #### Recovery - Head Grade: 9 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 9.0 Context: 228.7 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-12) copper #### Identity - Commodity: copper - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-022 RTP2-VO-E High Sulphidation #### Recovery - Head Grade: 0.53 - Head Grade Unit: % #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. - Negative factor: High arsenic content \(1,432 ppm\) Evidence · table > 0.53 Context: 153.8 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-13) gold #### Identity - Commodity: gold - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-022 RTP2-VO-E High Sulphidation #### Recovery - Head Grade: 0.16 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.16 Context: 153.8 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-14) silver #### Identity - Commodity: silver - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-022 RTP2-VO-E High Sulphidation #### Recovery - Head Grade: 5.5 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 5.5 Context: 153.8 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-15) copper #### Identity - Commodity: copper - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-008 RTP2-PO-F Porphyry #### Recovery - Head Grade: 0.52 - Head Grade Unit: % #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.52 Context: 199.4 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-16) gold #### Identity - Commodity: gold - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-008 RTP2-PO-F Porphyry #### Recovery - Head Grade: 0.15 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.15 Context: 199.4 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-17) silver #### Identity - Commodity: silver - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-18-008 RTP2-PO-F Porphyry #### Recovery - Head Grade: 3.5 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 3.5 Context: 199.4 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-18) copper #### Identity - Commodity: copper - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-SK-G Skarn #### Recovery - Head Grade: 0.77 - Head Grade Unit: % #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.77 Context: 129.5 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-19) gold #### Identity - Commodity: gold - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-SK-G Skarn #### Recovery - Head Grade: 0.23 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.23 Context: 129.5 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-20) silver #### Identity - Commodity: silver - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-031 RTP2-SK-G Skarn #### Recovery - Head Grade: 3.4 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 3.4 Context: 129.5 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-21) copper #### Identity - Commodity: copper - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-028 RTP2-SK-H Skarn #### Recovery - Head Grade: 0.53 - Head Grade Unit: % #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.53 Context: 180.6 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-22) gold #### Identity - Commodity: gold - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-028 RTP2-SK-H Skarn #### Recovery - Head Grade: 0.18 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 0.18 Context: 180.6 ### column leach [Link to this fact](https://atlas-staging.minestarters.com/news/regulus-announces-delivery-of-phase-two-metallurgical-samples-to-nuton-llc-a-rio--49f7c8b4-f25f-4deb-bc10-052beb7b80f2#fact-metallurgical-facts-23) silver #### Identity - Commodity: silver - Ticker: REG #### Test Work - Program Status: optimization - Test Type: column leach - Sample: AK-19-028 RTP2-SK-H Skarn #### Recovery - Head Grade: 13.3 - Head Grade Unit: g/t #### Lab - Laboratory: SGS #### Review - Needs Review: No - Historical: No #### Dates - Event date: 2023-11-07T00:00:00.000Z Reasoning: Representative sample for testing. Evidence · table > 13.3 Context: 180.6 ## 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.