Bahila

A porphyry-style molybdenum halo over a magnetite-destructive magnetic anomaly, ringed by skarn and copper veins. Magnetics, IP and surface work define four targets, and a program of more than 5,000 metres of drilling is testing them now.

Drilling underway Cu-Mo porphyry Skarn Al Amar · AA-005 / AA-008 / AA-012

At a glance

Scale and setting

Project area: Al Amar
Licences: AA-005, AA-008, AA-012
Deposit style: Porphyry copper-molybdenum with peripheral skarn
Stage: Drilling underway
Program: More than 5,000 m of RC and diamond drilling on one dual-purpose rig
Contractor: Golden Compass Mining Company
Terrane: Ar Rayn terrane, on the Al Amar Fault Zone
Neighbours: Near the Khnaiguiyah zinc-copper project; Ma’aden’s Al Amar mine approximately 35 km to the south

Target

A buried intrusive centre, the working hypothesis

Bahila is the most advanced prospect in the portfolio and the focus of our maiden drill program. The working hypothesis is a concealed, potassic-altered intrusive centre beneath a coincident set of anomalies: a molybdenum-copper geochemical halo at surface, a magnetite-destructive magnetic anomaly, and a chargeable body imaged by induced polarisation.

The prospect lies in the Ar Rayn terrane, interpreted as a Neoproterozoic continental-margin arc analogous to the Andean margin of Chile (Doebrich et al., 2007). Skarn on the northern contact and copper-bearing quartz veins to the south-west are interpreted as peripheral expressions of the same system.

~8 km²

Molybdenum halo mapped at surface

1,450

ppm Mo, peak rock chip

1.42%

Cu, peak rock chip

1 km

Diameter of the magnetic anomaly

Location of the Bahila licences AA-005, AA-008 and AA-012 among the Al Amar licences, with Khnaiguiyah and the Al Amar mine — **Location.** Bahila covers AA-005, AA-008 and AA-012 on the Al Amar fault zone; the target zones are on AA-012. Deposit locations are approximate.

The four Bahila target zones and two interpreted major faults on satellite imagery — **Target zones.** The Porphyry Zone, Skarn Zone, Central Trend and Eastern Trend, with the interpreted north-south and northwest faults.

Work completed

From regional data to the drill bit

Regional government geophysical and geochemical datasets reprocessed and integrated with two seasons of surface mapping and rock-chip sampling.
Regional airborne magnetics (Saudi Geological Survey), reprocessed, with a three-dimensional magnetic inversion (in3D Geoscience).
A 104 line-kilometre induced polarisation and resistivity survey over the area of interest (Simcoe Geoscience), with the raw data independently reprocessed and re-inverted by in3D Geoscience. The two models agree on the location of the principal anomalies.
Geological mapping and sampling along every priority survey line, which identified more than 3 km of quartz-sericite-pyrite alteration along a porphyritic dyke corridor.
Drill holes designed in the in3D Geoscience 25 m chargeability block model and ranked on the coincidence of geology, geochemistry and geophysics. Reverse circulation drilling underway.

Results

What the work has returned

A molybdenum halo of approximately 8 km², with 43 rock samples at or above 10 ppm Mo and a peak of 1,450 ppm Mo.
16 rock samples above 0.5% Cu, mostly in the Porphyry Zone, to a peak of 1.42% Cu at the Skarn Zone.
A magnetite-destructive magnetic anomaly approximately 1 km across, coincident with the geochemical core.
Approximately 1 km of garnet-diopside skarn on the northern contact of the intrusion, with copper and zinc mineralisation at surface.
175 chargeability anomalies from the IP survey, 55 of them first priority, on three trends organised around a north-south fault and a northwest-trending fault.
Four drill targets from the integration of geochemistry, magnetics and IP: the Porphyry Zone, the Skarn Zone, the Central Trend and the Eastern Trend.

Copper in rock chips at Bahila in three grade classes, with the three highest grades labelled — **Copper in rock chips.** Three grade classes; the three highest grades are labelled. 16 samples above 0.5% Cu, peak 1.42% Cu.

Molybdenum in rock chips at Bahila in three grade classes, with the three highest grades labelled — **Molybdenum in rock chips.** Three grade classes; the three highest grades are labelled. 43 samples at or above 10 ppm Mo, peak 1,450 ppm Mo.

Airborne magnetics reduced to pole around Bahila, with the target zones and licence boundary — **Magnetics.** Saudi Geological Survey airborne magnetics, reduced to pole and processed by in3D Geoscience.

A rock specimen from Bahila showing rings of green malachite around sulphide clots, held in the hand — **Specimen, AA-012.** Malachite rims around sulphide clots in a rock-chip specimen.

Chargeability 300 m below surface from the in3D block model, with the target zones and section line A to A-prime — **Chargeability, 300 m below surface.** Horizontal slice through the in3D 25 m block model.

East-west chargeability section A to A-prime through the Porphyry Zone and Eastern Trend, above the deeper magnetic body — **Section A–A′, looking north.** Chargeability from the in3D block model above the deeper magnetic body from the 3D magnetic inversion, drawn at 0.009 SI; the main magnetic body is interpreted from ~700 m depth. No vertical exaggeration.

Chargeability block model slices at 100, 250 and 400 m below surface with the target zones — **Chargeability block model at three depths.** 100, 250 and 400 m below surface; the chargeable bodies follow the interpreted faults.

3D view of the chargeability block model with chargeable bodies, section A to A-prime and the four labelled target zones — **Chargeability block model in 3D.** Chargeable bodies, section A–A′ and the four target zones, viewed from the south-east.

3D block with chargeable bodies under the four labelled target zones and the 3D magnetic inversion on its faces — **IP and magnetic models in 3D.** Chargeable bodies and the four target zones, inside a block whose faces show the 3D magnetic inversion.

Rock chip sampling is selective in nature and is not necessarily representative of the mineralisation hosted on the licence. Chargeability and resistivity anomalies indicate the possible presence of sulphide minerals; they are not measurements of mineralisation, grade or tonnage.

Drill program

Testing the four targets

The drilling program runs in two phases using a single dual-purpose rig. Initial reverse circulation (RC) holes, drilled to approximately 200 m, will test all four targets for prospective host rocks, alteration and sulphide mineralisation. These holes will also provide the first bedrock samples from beneath the weathered and leached cover that obscures much of Bahila.

The strongest chargeability response and the deeper magnetic body lie largely beyond the reach of RC drilling. Select RC holes will be extended with diamond tails to test these targets at depth.

Watch the animation →

Porphyry Zone

Centred on a potassic-altered, sulphide-bearing intrusion and the magnetic anomaly, where magnetics, geochemistry and IP coincide.

Skarn Zone

About 1 km of garnet-diopside skarn, with copper and zinc at surface, along the northern contact of the intrusion.

Central Trend

A chargeable body along the north-south fault, coincident with a porphyritic dyke corridor and quartz-sericite-pyrite alteration.

Eastern Trend

The strongest chargeability on the property, largely beneath weathered cover outside the surface geochemical footprint.

Chargeability measures sulphide content, not copper. Chargeability and resistivity anomalies indicate the possible presence of sulphide minerals; they are not measurements of mineralisation, grade or tonnage.

Drill program plan: the four target zones shaded by drilling approach on chargeability 300 m below surface — **Drill program.** RC across all four target zones, then diamond tails into the chargeability core at the Porphyry Zone and on selected holes elsewhere, based on the RC results.

Section through the Porphyry Zone with RC holes and conceptual diamond tails reaching the chargeability core and the deeper magnetic body — **RC drilling with diamond tails.** RC holes test the upper ~200 m; conceptual diamond tails reach the chargeability core and the deeper magnetic body (drawn at 0.009 SI).

The Greyridge drill camp at Bahila, licence AA-012 — **Bahila, licence AA-012.** The maiden drill program on the Al Amar project.

Next steps

Into the ground

Complete the RC phase across all four targets.
Assay and interpret the RC holes, and report results.
Diamond tails on selected holes, based on the RC results, to test the chargeable bodies and the deeper magnetic anomaly.
Complete the ground radiometric survey and integrate radiometric and hyperspectral data into the targeting model.

Drill program and target zones: shareholder update, October 2026. Doebrich et al. (2007). References to neighbouring deposits, including Khnaiguiyah and Ma’aden’s Al Amar mine, are provided for geological context only. Mineralisation on neighbouring properties is not necessarily indicative of mineralisation on Greyridge’s licences. See technical disclosure.

Updated 23 October 2026