Sendero Resources Identifies Key Geological Traits at Peñas Negras Project
Vancouver, British Columbia — February 17, 2026 — Leads & Copy — Sendero Resources Corp. (TSXV: SEND) has outlined key geological characteristics at its Peñas Negras Project in La Rioja Province, Argentina, indicating similarities to large-scale magmatic-hydrothermal systems found in the Vicuña Copper-Gold Belt.
The integrated analysis of geological, geophysical, alteration, geochemical, and structural data supports the interpretation that Peñas Negras is part of a district-scale mineral system. Sendero has adopted a district-thinking approach to refine target definition, mitigate geological risk, and accelerate drilling to assess the system’s potential in comparison to other deposits.
Peñas Negras is located within the Miocene Andean magmatic arc, which is known for long-lived, metal-fertile intrusive activity and significant hydrothermal footprints.
Key observations include:
- Significant copper and gold mineralization extending to depth, starting near the surface, as demonstrated by historic drill results.
- Widespread hydrothermal alteration across a broad area.
- Multiple intrusive phases interpreted as part of a fertile magmatic suite.
- Structural corridors and intersections that likely served as fluid pathways.
- Telescoped alteration assemblages consistent with high-level to deeper porphyry environments.
These features suggest a large-scale mineralizing system.
Peñas Negras shares geological characteristics with major Vicuña systems, including Miocene age magmatism, Andean arc setting, copper-gold fertility, porphyry-style alteration, telescoped system architecture, and broad hydrothermal footprints.
The alteration footprint at Peñas Negras extends beyond discrete showings and displays zonation patterns indicative of system development. Surface expressions include high-level alteration, suggesting potential for deeper intrusive centers.
Mineralization and alteration are spatially associated with regional structural trends that are part of a broader Andean corridor. Structural intersections and corridor-scale controls are considered important in the localization of large Vicuña-style systems.
Historical exploration includes approximately 15,875m across 80 holes. Some of the best drilling results of Phase 1 are outlined below:
- Hole PNDH-001 at La Pena intersected 226 metres grading 0.22 g/t AuEq from surface*.
- Hole PNDH-002 at Tamberias intersected 168 metres grading 0.22 g/t AuEq from surface*.
- Hole PNDH-003 at La Ollita intersected 256 metres grading 0.53 g/t AuEq from 84 m*.
- Hole PNDH-004 at La Ollita intersected 266 metres grading 0.52 g/t AuEq from 96 m**.
- Hole PNDH-05 at La Ollita intersected 300 m grading 0.36 g/t AuEq from 122 m**.
- Hole PNDH-06 at La Ollita intersected 364.2 m grading 0.51 g/t AuEq from 33.8m**.
* Sendero press release of April 03, 2024. ** Sendero press release of May 01, 2024.
Highlighted intervals from the historical drilling Eldorado (1995-1997 & 2011-2012) & Anglo American 2012:
Table derived from NI43-101 NI 43-101 Technical Report Peñas Negras 18th July 2023.
Geochemical trends indicate metal zonation patterns that may vector toward a copper-dominant source at depth, aligning with the evolutionary pathway observed in Andean systems.
The company’s exploration strategy is focused on testing the ENE-trending Mogotes fault, with a drill program of approximately 3,000 to 3,500 metres across 8 diamond drill holes to a depth of 500-600 metres. The program is designed to delineate Cu–Au and associated pathfinder element anomalies and alteration patterns across the property.
Alex Gostevskikh, Chief Executive Officer of Sendero Resources, stated that Peñas Negras exhibits geological ingredients that characterize major systems of the Vicuña belt, offering discovery leverage at an early stage.
Sendero Resources Corp. is focused on copper-gold exploration at its 100% owned Peñas Negras Project in the Vicuña Belt in Argentina. The Peñas Negras Project has similar geological characteristics to other deposits in the Vicuña Belt and multiple porphyry and high-sulfidation epithermal targets have been identified on the project. The centre of the Peñas Negras concession area is situated approximately 18 km southeast of Caserones mine operated by Lundin Mining, approximately 24 km northeast of NGEx Minerals’ Lunahuasi project, and about 32 km north-northeast of BHP-Lundin Mining’s Filo del Sol advanced exploration and development stage project.
The Company also has an option to earn an 100% interest on eight additional granted mining concessions covering 91.7 km2. The total project area comprises 211.77 km2
Source: Sendero Resources Corp.
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