CSAMT Survey Identifies Multiple Drill-Ready Targets at Bayan Springs South

Transformative Geophysical Breakthrough

Bayan Mining and Minerals Limited (ASX, BMM) has announced a significant advancement in its exploration efforts at the Bayan Springs South Project in Nevada, USA. The company’s recent Controlled-Source Audio-frequency Magnetotellurics (CSAMT) survey has delineated a large, coherent Carlin-style alteration system beneath the project area. This geophysical breakthrough provides a robust three-dimensional model of the subsurface, transforming the project from a surface anomaly into a well-defined target ready for drilling.

The survey, conducted by KLM Geoscience and independently interpreted by Ellis Geophysical Consulting, identified multiple vertically oriented feeder structures and extensive alteration corridors. These features are hallmark indicators of Carlin-style gold mineralisation, known for hosting large-tonnage disseminated gold deposits.

High-Impact Drill Targets and Strategic Location

Bayan’s technical team has pinpointed three priority targets within the project area, the Southern, Western, and Eastern targets. The Southern Target stands out as the most compelling, defined by a broad alteration corridor along a major structural trend, and is expected to receive the bulk of the initial drilling effort. The Western Target features complex structural settings interpreted as feeder zones, while the Eastern Target aligns with previously reported gold-in-rock assays and soil anomalies, suggesting potential for expanding the mineralised footprint.

Strategically, Bayan Springs South lies just 10 kilometres north of Kinross Gold Corporation’s Bald Mountain Mine, a major Carlin-style gold operation with substantial reserves and resources. This proximity not only validates the geological potential of Bayan’s project but also places it within one of the world’s most prolific gold belts.

From Data Integration to Drilling Readiness

The integration of CSAMT data with existing geological mapping, gold assays, and soil geochemistry has produced a coherent exploration model that significantly enhances confidence in the project’s discovery potential. Executive Director Fadi Diab described the results as a “transformational breakthrough,” highlighting the clarity and scale of the identified system and the de-risking of the upcoming drilling campaign.

With drilling permits being actively pursued through the U.S. Bureau of Land Management, Bayan is fast-tracking its maiden drill program. This initial phase aims to test the high-priority feeder structures and alteration corridors, potentially unlocking a large-tonnage Carlin-style gold system beneath the project.

A Rich Exploration History and Geological Context

Bayan Springs South benefits from a rich exploration legacy spanning over seven decades, with historical drilling and geochemical surveys providing a solid foundation for current efforts. The project’s geology is characterised by Lower to Middle Cambrian sedimentary sequences and complex fault networks, similar to those hosting mineralisation at Bald Mountain. The CSAMT survey’s resistivity and conductivity patterns align with typical Carlin-style alteration processes such as decalcification, argillic alteration, and silicification.

Looking ahead, Bayan is also considering complementary geophysical techniques like induced polarisation surveys to further characterise sulphide mineralisation associated with the alteration system, enhancing the targeting precision for future drilling.