Outstanding Blue Rose Copper Results - Discovery

In brief · summary, not quotable

Cobra Resources PLC has announced significant copper and gold assay results from its Manna Hill Copper Project in South Australia, specifically at the Blue Rose prospect. Key findings include an intersection of 74 meters at 1.02% copper and 0.25g/t gold, with a higher-grade interval of 14 meters at 1.52% copper and 0.42g/t gold. Another notable result is 86 meters at 0.60% copper and 0.14g/t gold. The drilling confirms down-dip continuity of mineralization, with preliminary interpretations suggesting a width of approximately 70 meters. Additionally, molybdenum mineralization was intersected, with grades of up to 0.12% Mo over 10 meters, which could offer significant upside. Further drilling is planned to validate true width estimates and explore the broader mineral system.

Full announcement

Select text to share a quote on X · sign in to keep highlights & notes in your COBR notes

Initial assays including 74m at 1.02% Cu and 0.25g/t Au add scale and continuity to shallow high-grade historical intersections

Cobra (LSE: COBR), a South Australian mineral exploration and development company, is pleased to report results from 4 of 18 recently completed Reverse Circulation ("RC") drill holes from Blue Rose, a copper-gold-molybdenum prospect within the Manna Hill Copper Project, located in the Nackara Arc, South Australia.

Highlights:

Extensive, high-grade copper-gold and ancillary molybdenum mineralisation, adding scale to historical intersections. Standout results include:

§ MHRC0018: 20m at 0.78% Cu, 0.14 g/t Au from 38m, and

§ 74m at 1.02% Cu, 0.25 g/t Au from 70m, including:

§ 14m at 1.52% Cu, 0.42g/t Au from 88m

§ MHRC0017: 86m at 0.60% Cu, 0.14 g/t Au from 18m, including:

§ 12m at 1.05% Cu, 0.09g/t Au from 32m

§ 12m at 1.10% Cu, 0.53 g/t Au from 58m

o Drilling confirms down-dip continuity to the historical shallow, high-grade intersection within RABR822 of 47m at 2.2% Cu and 0.76 g.t Au from 11m

o Preliminary interpretations infer a width of mineralisation of approximately 70m. Additional diamond drilling is planned to validate true width estimates.

Copper and separate outstanding molybdenum intersections include:

MHRC0003: 56m at 0.34% Cu from 34m, including:

§ 18m at 0.52% Cu from 38m, and

§ 14m at 0.21% Cu, 0.01% Mo from 122m, and

§ 10m at 0.12% Mo from 144m, including

§ 2m at 0.38% Mo from 146m

Molybdenum grades are high and may add considerable upside. The fact that molybdenum mineralisation is independent of copper-gold sulphides simplifies processing.
Molybdenum is a primary pathfinder for porphyry vectoring and identifying the potassic alteration zone, which can host higher-grade copper mineralisation. The intersected molybdenum grades and their direct association to narrow, porphyry type intrusive(s) is evidence of a much larger mineral system.
These initial results, and the geological observations from the remaining drillholes, combine to strongly support scale within the Blue Rose skarn and a greater porphyry system.
Results are partial for MHRC0003 and MHRC0001 with gold assays outstanding.
Results from a further 14 completed RC drillholes are expected throughout March.
Requisite approvals have been received in respect of a planned programme comprising 29 RC drillholes and 3 diamond drillholes at Blue Rose.

Rupert Verco, Managing Director, commented:

"Cobra considers that these results validate the potential of the Manna Hill Copper Project. The two intersections in MHRC0018 collectively total 92m at 1.0% Cu and 0.22 g/t Au, representing shallow, thick, high-grade mineralisation with standout economic potential.

Blue Rose is the first of a series of prospects to be addressed by Cobra in the fertile Manna Hill porphyry province. Follow-up work at Blue Rose and initial testing of other prospective Manna Hill prospects is being given high priority.

Cobra is advancing both its 100%-owned Boland In-Situ Recoverable Dysprosium and Terbium Project and the Manna Hill Copper-Gold-Molybdenum Project where the Company holds rights to acquire 100% ownership. Both projects are in South Australia, a secure jurisdiction for resource development and production. It's an exciting time to be invested in Cobra."

To watch a video of Rupert Verco, Managing Director, discussing these drill results, follow the link:

Cobra has a 12-month option to acquire the Manna Hill Project ("Manna Hill Option") and is focusing initially on the Blue Rose priority prospect where previous drilling intersected copper-gold mineralisation along 1.6km of strike immediately adjacent to a geophysical anomaly interpretated as a porphyry intrusion1.

Under the Manna Hill Option Agreement, Cobra sought to test several geological observations that have implications for a large-scale mineral system at Blue Rose. This included testing for the continuity of Blue Rose Skarn mineralisation at both depth and with increased strike. Initial results have been received from drill holes within Blue Rose 'Skarn' mineralisation

Results remain pending for:

Further drillholes at Blue Rose testing depth and along-strike continuity.
Drillholes targeting skarn-style mineralisation at Neptune Rose - a geophysical target aligned north of and parallel to Blue Rose.
Drilling targeting the Black Baccara Porphyry target; a large geophysical target north-west of the Blue Rose Skarn.

A total of 18 drillholes (3,200m) were completed in February. Unexpected excess water was encountered in many drillholes and resulted in some holes being terminated before targeted depths. Holes were terminated in a manner that shall enable targeted depths to be achieved with diamond tails should results warrant further drilling.

Initial results have been received from:

MHRC0001: 0 - 156m*

MHRC0003: 0 - 156m*

MHRC0017: 0 - 150m

MHRC0018: 0 - 150m

Based on pXRF and visual observations MHRC0017 and MHRC0018 were prioritised for assay.

Table 1: Reported downhole significant intersections

MHRC0001		12	16	4	0.27	*
and		58	62	4	0.75	*
and		110	138	28	0.23	*
MHRC0003		34	90	56	0.34	*
including		40	48	8	0.71	*
and	122	136	14	0.21	*	0.01
and	144	154	10	0.07	*	0.12
including	146	148	2	0.12	*	0.38
MHRC0017		18	104	86	0.60	0.14
Including		32	44	12	1.05	0.09
		58	70	12	1.10	0.53
		86	90	4	1.05	0.57
MHRC0018		38	58	20	0.78	0.13
and		70	142	74	1.02	0.25
including		88	102	14	1.52	0.42
including		112	116	4	1.63	0.42
including		120	124	4	2.02	0.55
including	140	142	2	1.65	1.10	0.04

*Fire assay (gold) results are pending

Figure 1: Blue Rose, Neptune Rose and Black Baccara Targets - February 2026 drilling collars and traces over a background of historical drillholes.

Blue Rose High-Grade Zone

MHRC0017 and MHRC0018 were designed to test the continuity of primary mineralisation below high-grade intersected within RABR822 of 47m at 2.2% Cu and 0.76 g.t Au from 11m.

MHRC 0017 demonstrated that mineralisation is continuous through the transition zone from oxidized to primary mineralisation. Most of the mineralisation in the intersection 86m of 0.60% copper and 0.14 g/t gold is considered to occur in the transitional zone.

MHRC0018 intersected two distinct zones:

An oxide intersection of 20m at 0.78% Cu, 0.13g/t Au from 38m downhole, and
A primary sulphide zone of 74m at 1.02% Cu, 0.25 g/t Au from 70m downhole. This intersection is entirely within primary sulphide mineralisation.

Mineralisation intersected by drillholes MHRC0017 and 0018 has a true width of approximately 70m where downdip continuity appears strong. MHRC0018 is the best primary sulphide result reported from the project.

Figure 2: Cross Section A: Highlighting intersections of drillholes MHRC0017 and MHRC0018.

Porphyry intrusion related mineralisation

MHRC0003 has established continuity of mineralisation associated with two dykes and mineralisation intersected in the following holes:

Mineralisation within MHRC0003 shows connectivity between shallow oxide mineralisation within RABR205 that intersected 43m at 0.6% Cu from 12m and diamond drillhole BRDD003 that contains multiple low-grade zones and included: 16.15m at 0.51% Cu, 17.8m at 0.08% Mo from 144.2m, 5.8m at 0.13% Mo from 156.2m and 26.7m at 0.43% Cu from 195m.

Molybdenum mineralisation occurs in association with bedding-concordant dioritic intrusive rocks in each of these three drillholes. Recognition of this rock type/mineralisation relationship is expected to materially assist exploration for the porphyry-style mineralisation which is thought likely to exist nearby.

Figure 3: Cross section 429,000mE depicting mineralisation continuity defined by MHRC0003 and the porphyry related intrusions that host high-grade molybdenum mineralisation.

Figure 4: Long section 6,388,350mN, highlighting the depth, continuity and distribution of intersections.

Significance of results

High-grade (in excess of 1% copper) primary mineralisation lies open beneath the 130 metre vertical depth reached by drillhole MHRC0018. Down-dip extensions of this mineralisation present an attractive target for planned diamond drilling.

As the remaining drill-return assays are received over the coming fortnight, mineralisation geometry will be modelled, geochemical trends will be identified, and next steps will be determined.

About the Manna Hill Project

Cobra RNS: Option to Acquire Significant Copper Project, 26 August 2025

Glossary

Au	Gold
Cu	Copper
Mo	Molybdenum

Regional map showing Cobra's tenements in South Australia

LinkedIn: https://www.linkedin.com/company/cobraresourcesplc

X: https://twitter.com/Cobra_Resources

Subscribe to our news alert service: https://investors.cobraplc.com/auth/signup

Appendix 1: Collar coordinates and drillhole details coordinates in MGA94, Zone 54

MHRC0001	6388389	428976	240	156	180	-60
MHRC0002	6388736	428497	239	270	180	-60
MHRC0003	6388392	429025	240	156	180	-60
MHRC0004	6388725	429099	235	126	180	-60
MHRC0005	6388774	429101	236	156	180	-60
MHRC0006	6388826	429101	236	156	180	-60
MHRC0007	6388879	429102	237	168	180	-60
MHRC0008	6388528	429201	231	258	180	-60
MHRC0009	6388328	428824	238	138	180	-60
MHRC0010	6388372	428824	239	174	180	-60
MHRC0011	6388421	428834	239	210	180	-60
MHRC0012	6388554	428804	238	180	0	-60
MHRC0013	6388320	428625	241	150	180	-60
MHRC0014	6388475	428626	239	180	180	-60
MHRC0015	6388425	428325	239	156	180	-60
MHRC0016	638855	428247	241	264	220	-60
MHRC0017	6388398	429378	235	150	180	-60
MHRC0018	6388426	429376	234	152	180	-60

Appendix 2 - Compositing of significant intersections. Labels in orange represent reported downhole intersections

MHRC0001	BPE00507	10	12	*	723	3.4
MHRC0001	BPE00508	12	14	*	4,160	6.6
MHRC0001	BPE00509	14	16	*	1,180	5.4
MHRC0001	BPE00511	16	18	*	398	2
MHRC0001	BPE00513	20	22	*	979	12.4
MHRC0001	BPE00514	22	24	*	909	5.4
MHRC0001	BPE00515	24	26	*	1,490	8.6
MHRC0001	BPE00516	26	28	*	1,300	2.6
MHRC0001	BPE00517	28	30	*	1,260	3.2
MHRC0001	BPE00518	30	32	*	592	1
MHRC0001	BPE00519	32	34	*	891	0.8
MHRC0001	BPE00520	34	36	*	1,270	1
MHRC0001	BPE00521	36	38	*	342	3.2
MHRC0001	BPE00522	38	40	*	1,110	3.4
MHRC0001	BPE00523	40	42	*	889	1
MHRC0001	BPE00525	42	44	*	1,190	2.8
MHRC0001	BPE00526	44	46	*	1,370	59.2
MHRC0001	BPE00527	46	48	*	513	20.8
MHRC0001	BPE00528	48	50	*	1,660	28.2
MHRC0001	BPE00529	50	52	*	1,870	20.6
MHRC0001	BPE00530	52	54	*	1,320	13.6
MHRC0001	BPE00531	54	56	*	3,270	10.6
MHRC0001	BPE00532	56	58	*	827	13.6
MHRC0001	BPE00533	58	60	*	4,890	24.8
MHRC0001	BPE00534	60	62	*	10,200	16.8
MHRC0001	BPE00535	62	64	*	648	46.6
MHRC0001	BPE00556	102	104	*	591	30.8
MHRC0001	BPE00557	104	106	*	1,500	49.8
MHRC0001	BPE00558	106	108	*	1,940	16.2
MHRC0001	BPE00559	108	110	*	635	8.6
MHRC0001	BPE00561	110	112	*	3,320	12.8
MHRC0001	BPE00562	112	114	*	668	8.4
MHRC0001	BPE00563	114	116	*	987	11.2
MHRC0001	BPE00564	116	118	*	5,500	51.2
MHRC0001	BPE00565	118	120	*	773	44.2
MHRC0001	BPE00566	120	122	*	1,600	37
MHRC0001	BPE00567	122	124	*	1,530	44.4
MHRC0001	BPE00568	124	126	*	169	7.4
MHRC0001	BPE00569	126	128	*	7,580	21
MHRC0001	BPE00570	128	130	*	1,860	22.2
MHRC0001	BPE00571	130	132	*	222	5.2
MHRC0001	BPE00572	132	134	*	2,580	38.8
MHRC0001	BPE00573	134	136	*	3,400	56.2
MHRC0001	BPE00575	136	138	*	2,360	14.6
MHRC0001	BPE00576	138	140	*	769	32
MHRC0001	BPE00577	140	142	*	237	21.2
MHRC0003	BPE00741	24	26	*	2,080	4
MHRC0003	BPE00742	26	28	*	1,110	3.2
MHRC0003	BPE00743	28	30	*	226	2.2
MHRC0003	BPE00744	30	32	*	802	2.4
MHRC0003	BPE00745	32	34	*	1,920	1.4
MHRC0003	BPE00746	34	36	*	2,680	0.8
MHRC0003	BPE00747	36	38	*	3,170	1.2
MHRC0003	BPE00748	38	40	*	4,600	5
MHRC0003	BPE00749	40	42	*	5,060	7.6
MHRC0003	BPE00750	42	44	*	7,410	7
MHRC0003	BPE00751	44	46	*	5,750	32.8
MHRC0003	BPE00752	46	48	*	10,140	33.6
MHRC0003	BPE00753	48	50	*	3,020	4.4
MHRC0003	BPE00754	50	52	*	3,140	9
MHRC0003	BPE00755	50	52	*	2,710	6.4
MHRC0003	BPE00756	52	54	*	5,200	16
MHRC0003	BPE00757	54	56	*	902	48
MHRC0003	BPE00758	56	58	*	765	16.4
MHRC0003	BPE00759	58	60	*	2,060	135
MHRC0003	BPE00762	62	64	*	1,800	24.4
MHRC0003	BPE00763	64	66	*	337	11.4
MHRC0003	BPE00764	66	68	*	2,390	23.4
MHRC0003	BPE00765	68	70	*	5,460	76.2
MHRC0003	BPE00766	70	72	*	3,770	19.6
MHRC0003	BPE00767	72	74	*	4,600	5
MHRC0003	BPE00768	74	76	*	1,140	3.4
MHRC0003	BPE00769	76	78	*	1,870	419
MHRC0003	BPE00770	78	80	*	3,350	56
MHRC0003	BPE00771	80	82	*	1,560	31.2
MHRC0003	BPE00772	82	84	*	991	36
MHRC0003	BPE00773	84	86	*	2,390	14
MHRC0003	BPE00775	86	88	*	4,760	26.6
MHRC0003	BPE00776	88	90	*	3,260	240
MHRC0003	BPE00777	90	92	*	747	46.8
MHRC0003	BPE00778	92	94	*	88	9
MHRC0003	BPE00779	94	96	*	1,290	7.4
MHRC0003	BPE00780	96	98	*	982	15.4
MHRC0003	BPE00789	114	116	*	189	25.6
MHRC0003	BPE00790	116	118	*	92	9.2
MHRC0003	BPE00792	120	122	*	449	17.2
MHRC0003	BPE00793	122	124	*	5,800	101
MHRC0003	BPE00794	124	126	*	2,030	63.6
MHRC0003	BPE00795	126	128	*	1,230	86
MHRC0003	BPE00796	128	130	*	860	48.4
MHRC0003	BPE00797	130	132	*	1,030	43.4
MHRC0003	BPE00798	132	134	*	1,900	131
MHRC0003	BPE00799	134	136	*	2,030	55
MHRC0003	BPE00800	136	138	*	578	5.2
MHRC0003	BPE00801	138	140	*	2,400	4.4
MHRC0003	BPE00802	140	142	*	1,810	130
MHRC0003	BPE00803	142	144	*	1,180	83.6
MHRC0003	BPE00804	144	146	*	755	926
MHRC0003	BPE00805	144	146	*	28	892
MHRC0003	BPE00806	146	148	*	1,180	3760
MHRC0003	BPE00807	148	150	*	1,580	431
MHRC0003	BPE00808	150	152	*	347	337
MHRC0003	BPE00809	152	154	*	297	591
MHRC0003	BPE00811	154	156	*	235	216
MHRC0017	BPE02049	12	14	0.01	1,240	3.8
MHRC0017	BPE02050	14	16	0.02	1,350	6.8
MHRC0017	BPE02051	16	18	0.01	1,110	11.8
MHRC0017	BPE02052	18	20	0.01	3,700	1.6
MHRC0017	BPE02053	20	22	0.01	4,620	7
MHRC0017	BPE02054	22	24	0.01	4,300	1.6
MHRC0017	BPE02055	22	24	0.01	5,350	5
MHRC0017	BPE02056	24	26	0.02	1,880	1.8
MHRC0017	BPE02057	26	28	0.02	3,840	2
MHRC0017	BPE02058	28	30	0.01	4,460	1.6
MHRC0017	BPE02059	30	32	0.02	5,400	1.2
MHRC0017	BPE02061	32	34	0.02	13,000	1
MHRC0017	BPE02062	34	36	0.03	14,000	1
MHRC0017	BPE02063	36	38	0.02	11,700	0.8
MHRC0017	BPE02064	38	40	0.02	7,910	0.4
MHRC0017	BPE02065	40	42	0.07	7,520	0.6
MHRC0017	BPE02066	42	44	0.38	8,840	0.4
MHRC0017	BPE02067	44	46	0.04	3,290	0.6
MHRC0017	BPE02068	46	48	0.07	3,730	1.2
MHRC0017	BPE02069	48	50	0.04	1,730	1.6
MHRC0017	BPE02070	50	52	0.02	7,420	1.8
MHRC0017	BPE02071	52	54	0.01	4,280	2.4
MHRC0017	BPE02072	54	56	0.15	9,700	1.2
MHRC0017	BPE02073	56	58	0.18	3,680	1
MHRC0017	BPE02075	58	60	0.31	12,000	20.8
MHRC0017	BPE02076	60	62	1.35	9,130	18.4
MHRC0017	BPE02077	62	64	0.68	14,500	1.2
MHRC0017	BPE02078	64	66	0.25	4,950	1.6
MHRC0017	BPE02079	66	68	0.25	7,270	2
MHRC0017	BPE02080	68	70	0.36	18,000	268
MHRC0017	BPE02081	70	72	0.05	4,570	4.4
MHRC0017	BPE02082	72	74	0.01	1,890	2.4
MHRC0017	BPE02083	74	76	0.04	3,410	1.6
MHRC0017	BPE02084	76	78	0.07	4,820	4.8
MHRC0017	BPE02085	78	80	0.05	9,150	9.2
MHRC0017	BPE02086	80	82	0.1	2,480	1.8
MHRC0017	BPE02087	82	84	0.1	2,560	0.6
MHRC0017	BPE02088	84	86	0.05	2,120	1.2
MHRC0017	BPE02089	86	88	0.35	5,890	18.8
MHRC0017	BPE02090	88	90	0.78	15,200	65.4
MHRC0017	BPE02091	90	92	0.03	1,020	3.6
MHRC0017	BPE02092	92	94	0.01	230	2.4
MHRC0017	BPE02093	94	96	0.06	3,350	8.8
MHRC0017	BPE02094	96	98	0.05	4,160	7.2
MHRC0017	BPE02095	98	100	0.03	2,010	54
MHRC0017	BPE02096	100	102	0.02	2,060	29
MHRC0017	BPE02097	102	104	0.07	3,020	27
MHRC0017	BPE02098	104	106	0.02	846	74.6
MHRC0017	BPE02099	106	108	0.02	1,470	31
MHRC0017	BPE02106	118	120	0.01	211	50.4
MHRC0017	BPE02107	120	122	0.01	502	16.8
MHRC0017	BPE02108	122	124	0.01	4,260	19.4
MHRC0017	BPE02109	124	126	0.01	1,090	5
MHRC0017	BPE02111	126	128	0.01	2,220	13.6
MHRC0017	BPE02112	128	130	0.01	1,310	9.8
MHRC0017	BPE02113	130	132	0.01	473	7.2
MHRC0017	BPE02114	132	134	0.01	117	9
MHRC0018	BPE02139	30	32	0.01	2,370	1.4
MHRC0018	BPE02140	32	34	0.08	1,010	0.6
MHRC0018	BPE02141	34	36	0.01	464	0.4
MHRC0018	BPE02142	36	38	0.01	668	0.8
MHRC0018	BPE02143	38	40	0.06	5,820	7.6
MHRC0018	BPE02144	40	42	0.04	13,200	5.8
MHRC0018	BPE02145	42	44	0.16	14,600	2
MHRC0018	BPE02146	44	46	0.04	11,200	1.6
MHRC0018	BPE02147	46	48	0.43	9,910	45.4
MHRC0018	BPE02148	48	50	0.39	9,490	8.4
MHRC0018	BPE02149	50	52	0.04	5,140	1.4
MHRC0018	BPE02150	52	54	0.03	2,320	1
MHRC0018	BPE02151	54	56	0.05	3,500	0.4
MHRC0018	BPE02152	56	58	0.02	3,140	0.4
MHRC0018	BPE02153	58	60	0.01	370	1.2
MHRC0018	BPE02154	60	62	0.01	827	1
MHRC0018	BPE02158	66	68	0.01	623	1
MHRC0018	BPE02159	68	70	0.03	1,310	7.4
MHRC0018	BPE02161	70	72	0.04	6,040	20.4
MHRC0018	BPE02162	72	74	0.08	8,250	14.6
MHRC0018	BPE02163	74	76	0.07	16,200	15.2
MHRC0018	BPE02164	76	78	0.33	16,900	1.6
MHRC0018	BPE02165	78	80	0.16	13,200	3
MHRC0018	BPE02166	80	82	0.37	8,810	15.4
MHRC0018	BPE02167	82	84	0.15	14,200	11.6
MHRC0018	BPE02168	84	86	0.18	8,910	5.6
MHRC0018	BPE02169	86	88	0.25	2,920	1.4
MHRC0018	BPE02170	88	90	0.07	16,300	9.4
MHRC0018	BPE02171	90	92	0.28	18,600	12.6
MHRC0018	BPE02172	92	94	0.83	25,900	84.8
MHRC0018	BPE02173	94	96	0.4	14,300	5.6
MHRC0018	BPE02175	96	98	0.18	7,850	1.6
MHRC0018	BPE02176	98	100	0.1	4,590	1.2
MHRC0018	BPE02177	100	102	1.1	19,200	11.4
MHRC0018	BPE02178	102	104	0.28	12,500	11.6
MHRC0018	BPE02179	104	106	0.09	3,240	1.8
MHRC0018	BPE02180	106	108	0.1	2,690	1.2
MHRC0018	BPE02181	108	110	0.01	5,350	1.4
MHRC0018	BPE02182	110	112	0.2	9,550	0.4
MHRC0018	BPE02183	112	114	0.53	22,200	12.6
MHRC0018	BPE02184	114	116	0.31	10,300	7.8
MHRC0018	BPE02185	116	118	0.13	5,270	1.4
MHRC0018	BPE02186	118	120	0.23	8,010	2.8
MHRC0018	BPE02187	120	122	0.41	12,300	2.6
MHRC0018	BPE02188	122	124	0.68	28,100	3.8
MHRC0018	BPE02189	124	126	0.07	4,810	3.2
MHRC0018	BPE02190	126	128	0.03	13,200	17
MHRC0018	BPE02191	128	130	0.04	4,800	6.2
MHRC0018	BPE02192	130	132	0.01	1,920	19.2
MHRC0018	BPE02193	132	134	0.03	2,220	3.8
MHRC0018	BPE02194	134	136	0.01	791	0.4
MHRC0018	BPE02195	136	138	0.03	3,020	13.6
MHRC0018	BPE02196	138	140	0.14	6,360	16.8
MHRC0018	BPE02197	140	142	1.1	16,500	427
MHRC0018	BPE02198	142	144	0.02	3,930	16
MHRC0018	BPE02199	144	146	0.01	1,320	14.4
Appendix 3: JORC Code, 2012 Edition - Table 3
Criteria					JORC Code explanation	Commentary
Logging					· Whether core and chip samples have been geologically and geotechnically logged to a level of detail to support appropriate Mineral Resource estimation, mining studies and metallurgical studies. · Whether logging is qualitative or quantitative in nature. Core (or costean, channel, etc) photography. · The total length and percentage of the relevant intersections logged.	· Historic logging has been completed with a number of different geological logging codes. These are being translated into a standardized logging format prior to entry into the Cobra Drillhole Database · All holes were qualitatively geologically logged for their entire length by suitably qualified Cobra geologists and recorded onsite into Cobra's MX Deposit database. · Mineral Resources have not been estimated; however, the quality of the logging is expected to be suitable for low-confidence resource estimation purposes. · The detail of geological logging is considered sufficient for exploration and resource definition drilling. · Logging included visual estimates for copper oxides and sulphides aswell as pyrite content · All intersections were logged.
Sub-sampling techniques and sample preparation					· If core, whether cut or sawn and whether quarter, half or all core taken. · If non-core, whether riffled, tube sampled, rotary split, etc and whether sampled wet or dry. · For all sample types, the nature, quality and appropriateness of the sample preparation technique. · Quality control procedures adopted for all sub-sampling stages to maximise representivity of samples. · Measures taken to ensure that the sampling is representative of the in situ material collected, including for instance results for field duplicate/second-half sampling. · Whether sample sizes are appropriate to the grain size of the material being sampled.	Historic · Historic sampling has not been assessed. Current · For each metre a Metzke cone split sample was collected in a calico bag. A portable XRF unit was used to screen a selected interval of 1m RC bulk samples for anomalous copper values. Where copper value readings exceeded ~200 ppm Cu, sampling was conducted at 1m intervals using the Metzke cone split samples. · Weights of samples submitted for assay averaged 2.5 kg and ranged between 1.8 to 4.1 kg. Sample size is considered appropriate for the material sampled. · Commercially certified reference material of known copper grades and of suitable matrix were included in the laboratory assay sequence at a rate of 1 per 50 samples. · First-split duplicate samples were collected at a rate of 1 per 50 samples. · A coarse blank sample was inserted 1 in every 50 samples. · The Competent Person considers that the sample size is appropriate to the grain size of the material being sampled.
Location of data points					· Accuracy and quality of surveys used to locate drill holes (collar and down-hole surveys), trenches, mine workings and other locations used in Mineral Resource estimation. · Specification of the grid system used. · Quality and adequacy of topographic control.	Historic · Historic Drillholes were recorded with a number of different datums. · Validation of the datums used for each program have been conducted and are continuing. · The key historic drilling used for planning of the January 2026 drill program have high confidence in the datum used and have been assessed in the field Current · Drill hole locations were determined by handheld GPS with a nominal accuracy of +/- 5 metres. · All coordinates and maps presented here are in the MGA Zone 53 GDA94 coordinate system. · Topographic control is provided by Aerometrex Reigel VQ-780ii Airborne Laser Scanner producing LiDAR digital elevation data at 0.1m accuracy with collar heights extracted from a DTM produced from the LiDAR data.
Audits or reviews					· The results of any audits or reviews of sampling techniques and data.	·
Appendix 4: Section 2 reporting of exploration results
Criteria					JORC Code explanation	Commentary
Mineral tenement and land tenure status					· Type, reference name/number, location and ownership including agreements or material issues with third parties such as joint ventures, partnerships, overriding royalties, native title interests, historical sites, wilderness or national park and environmental settings. · The security of the tenure held at the time of reporting along with any known impediments to obtaining a licence to operate in the area.	· Blue Rose is located on EL6009 that is held by Hamelin Gully Pty Ltd. Manna Hill Mining Pty Ltd, a subsidiary of Cobra Resources Plc has a 12-month option to acquire Hamelin Gully. · This drilling forms part of the company's strategy to seek shareholder approval to exercise the option. · A 1% Over Riding Royalty Agreement is registered between Hamelin Gully and Springton Trust A Native Title Agreement is in place between the Wilyakali People and Hamelin Gully Pty Ltd Cultural heritage surveys have been completed over EL6009, clearing proposed drill sites
Further work					· The nature and scale of planned further work (eg tests for lateral extensions or depth extensions or large-scale step-out drilling). · Diagrams clearly highlighting the areas of possible extensions, including the main geological interpretations and future drilling areas, provided this information is not commercially sensitive.	· RC drill program at Blue Rose, Desert Rose and Double Delight in early January 2026 · Follow up diamond drilling at Desert Rose · Greenfields soil sampling program

Cleaned text: letterheads, contacts and legal notices removed. View the original announcement ↗ · Company filings. Not investment advice.