Mount Berghaus Drilling Yields Up to 3.57 g/t Gold; Gravity Survey Set to Follow
Mantle Minerals reports encouraging geophysical findings at its Mount Berghaus project, with upcoming gravity surveys set to refine targets near the prolific Hemi gold deposit.
- Preliminary geophysical review highlights gold mineralisation halos at Mount Berghaus
- Follow-up high-resolution ground gravity survey planned to identify buried intrusives
- Recent drilling confirms gold intersections up to 3.57 g/t over 4 metres
- Proximity to De Grey Mining’s 11.2 million ounce Hemi deposit enhances exploration potential
- De Grey’s recent aircore drilling at Roberts Hill yields no significant gold results
Mount Berghaus Exploration Update
Mantle Minerals Limited (ASX: MTL) has provided a promising update on its Mount Berghaus exploration licence (E45/5899) located in the Mallina Basin, approximately 10 kilometres northeast of De Grey Mining’s (ASX: DEG) prolific Hemi gold deposit. The company’s recent preliminary geophysical review, conducted by Core Geophysics, builds on late 2024 reverse circulation (RC) drilling results that confirmed a broad halo of gold mineralisation hosted within Hemi-style igneous lithologies.
The review identified that higher-grade gold intersections appear to be associated with subtle magnetic features and northwest-trending structures that align with interpreted Mallina parallel northeast-southwest trending faults. These structural controls are critical as they may localise gold mineralisation, a hallmark of the region’s geology.
Gold Halos and Upcoming Gravity Survey
Two significant gold halos have been delineated towards the southern part of the tenement, where drilling intersected gold mineralisation between 40 to 80 metres depth. Notable intersections include 4 metres at 3.57 grams per tonne (g/t) gold from 40 metres in drill hole MMAC0218 and 5 metres at 1.10 g/t gold from 40 metres in MMRC01. Another intersection of 32 metres at 0.16 g/t gold from 123 metres was also recorded in MMRC01.
To further refine these targets, Mantle has commissioned a high-resolution ground-borne gravity survey scheduled to commence this quarter. This survey aims to detect buried intrusive bodies and better define structural controls that could host higher-grade mineralisation. The gravity survey will focus on the southern drill line area containing the two gold halos, potentially unlocking new drill targets ahead of the next phase of exploration.
Context Within the Mallina Basin and Regional Significance
The Mallina Basin is a highly prospective gold province, with De Grey Mining’s Hemi deposit recently updated to a resource of 263.9 million tonnes at 1.3 g/t gold for 11.2 million ounces. Mantle’s Mount Berghaus tenement lies strategically close to this world-class deposit, enhancing the potential for discovering economically viable gold mineralisation within similar geological settings.
While De Grey’s recent aircore drilling at Roberts Hill, another nearby project, did not yield significant gold intersections, Mantle’s focus on Mount Berghaus and its structural complexity offers a more compelling exploration narrative. The presence of multiple interpreted northwest structures and magnetic anomalies suggests a fertile environment for further discoveries.
Looking Ahead
Mantle Minerals’ methodical approach, combining geophysical reviews with targeted drilling and advanced gravity surveys, positions the company well to expand its understanding of the Mount Berghaus gold system. The upcoming gravity survey results will be pivotal in guiding future drilling campaigns and could significantly enhance the project’s value proposition.
Investors and analysts will be watching closely as Mantle progresses its exploration activities in this highly prospective corridor, where the potential for new gold discoveries remains robust.
Bottom Line?
Mantle’s next gravity survey could be the key to unlocking a new gold frontier near the Hemi deposit.
Questions in the middle?
- Will the upcoming gravity survey confirm the presence of buried intrusives linked to higher-grade gold?
- How might Mantle’s exploration results influence its valuation relative to De Grey Mining’s dominant position?
- What are the timelines and budget implications for follow-up drilling based on the new geophysical data?
