GoldMining Inc. Confirms Additional Significant Gold-Antimony Results in Historic Drilling, Including 4.01 g/t AuEq over 56 metres (2.06 g/t Au & 0.55% Sb) and 2.54 g/t AuEq over 107 metres (1.44 g/t Au & 0.31% Sb), at its Crucero Project, Peru

Rhea-AI Summary

GoldMining Inc. has reported significant gold-antimony results from historic drilling at its 100% owned Crucero Project in Peru. Key highlights include intercepts of 4.01 g/t AuEq over 56 metres and 2.54 g/t AuEq over 107 metres. The company has validated assay results from 20 additional drill holes, expanding the database to 79 drill holes with over 17,000 assay records. The A1 Zone at Crucero shows two phases of gold mineralization, with the later phase associated with higher gold and antimony grades. Notable intercepts include 30.41 g/t AuEq over 2 metres and 6.25 g/t AuEq over 20 metres. The project's dual gold-antimony potential is particularly significant given current near-record antimony prices.

Positive

• Strong drill results including 4.01 g/t AuEq over 56m and 2.54 g/t AuEq over 107m demonstrate significant mineralization
• Project contains both gold and antimony, enhancing potential economic value with antimony near record prices
• 100% ownership of the project gives company full control over development
• Extensive database of 79 drill holes and over 17,000 assay records provides robust exploration foundation
• High-grade intercepts like 30.41 g/t AuEq over 2m indicate potential for rich mineralization zones

Negative

• Project requires additional work to locate and validate remaining historic assay certificates
• Second phase of gold mineralization, while higher grade, is volumetrically minor compared to first phase
• Project location in Peru may present geopolitical and operational challenges
• Mineralization appears complex with two distinct phases requiring careful geological interpretation

Insights

Mining Engineer & Resource Analyst

GoldMining's historic drill results reveal significant gold-antimony mineralization at Crucero, potentially enhancing project economics amid high antimony prices.

GoldMining's validation of historic drilling data at their 100% owned Crucero Project in Peru has uncovered significant antimony mineralization alongside the previously known gold deposits. The standout intercepts include 4.01 g/t AuEq over 56 metres (2.06 g/t Au & 0.55% Sb) and 2.54 g/t AuEq over 107 metres (1.44 g/t Au & 0.31% Sb), highlighting the dual-metal potential of the deposit.

The most impressive result comes from drill hole DDH-07, showing 30.41 g/t AuEq over 2 metres, including a section with 14.90 g/t Au and 30.90% Sb, demonstrating exceptional grade potential in certain zones. This is particularly significant given that antimony prices are near record highs, providing a potential value-add beyond just the gold content.

What's notable about this discovery is that it comes from reanalysis of existing drill core rather than new drilling, representing a cost-effective enhancement of the project's economic profile. The company has now validated antimony assays for 79 drill holes plus 657 trench assays, building a comprehensive database of over 17,000 assay records.

The A1 Zone at Crucero appears to have experienced two phases of mineralization - the first associated with isoclinal folding (pyrite and pyrrhotite) and a second phase characterized by brittle deformation and remobilization of gold with arsenopyrite and antimony. Though this second phase is volumetrically smaller, it contains the higher-grade gold and antimony values, which could significantly influence mining economics.

The antimony content, primarily as the mineral stibnite, could substantially boost the project's value given antimony's classification as a critical metal and its current high market price. The company is using a conservative price assumption of $35,600/tonne for antimony in their equivalent grade calculations, which is approximately 35% below current spot prices.

VANCOUVER, BC, June 17, 2025 /PRNewswire/ - GoldMining Inc. (the "Company" or "GoldMining") (TSX: GOLD) (NYSE American: GLDG) is pleased to report additional strong historic drill intercepts from its 100% owned Crucero Project ("Crucero" or the "Project") in Peru. These results are reported as part of the Company's previously announced ongoing review and validation of historic assay results, which has continued to show significant antimony ("Sb") mineralization, in conjunction with the known gold ("Au") mineralization, expanding the project's potential for multi-metal value creation.  

Drill Intercept Highlights:

• CPC 10-1: 2.03 g/t gold equivalent* ("AuEq") (1.58 g/t Au & 0.13% Sb) over 133.1 metres from 4 metres depth;
• CPC 10-3: 2.25 g/t AuEq (1.54 g/t Au & 0.20% Sb) over 88 metres, from 72 metres depth;
• DDH-07: 30.41 g/t AuEq (3.72 g/t Au & 7.58% Sb) over 2 metres, from 49 metres depth;
• DDH-24: 2.54 g/t AuEq (1.44 g/t Au & 0.31% Sb) over 107 metres, from 108 metres depth;
• DDH-27: 4.01 g/t AuEq (2.06 g/t Au & 0.55% Sb) over 56 metres, from 133 metres depth; and,
• DDH-34: 6.25 g/t AuEq (1.88 g/t Au & 1.24% Sb) over 20 metres, from 385 metres depth.

*AuEq is calculated using the formula AuEq (g/t) = Au grade (g/t) + 3.52 * Sb grade (%). Au price of $2,200/oz and Sb price of $35,600/tonne (both approximately 35% below current spot price). Reports gold recovery at 100% and uses a notional antimony recovery of 70%.

"These results strengthen our confidence in Crucero's potential as a dual gold-antimony system," said Alastair Still, CEO of GoldMining. "With antimony price near record highs and gold mineralization already confirmed, we are working to uncover new value in a project that has been underexplored for critical metals potential. Antimony, primarily occurring as the mineral stibnite, co-exists with gold mineralization at the Project. We believe that thorough continued analysis of the historic gold and antimony results within the existing assay database there is an opportunity to enhance the economic value for the 100% owned Crucero Project."

Further to the Company's April 23, 2025, news release, which presented assay intercepts for historic drillholes DDH-01 to -04, the Company has continued to systematically compile Sb assay results within the Project drill database. This work has included the validation of historic assays against original independent laboratory certificates.  Presented herein are assays for a further 20 drill holes that have been validated by the Company to date.   

The updated and revised Crucero database now contains assay data for 79 drill holes as well as 657 trench assays including over 17,000 assay records, 13,296 of which have independent laboratory certificates available. The Company is working with the laboratories to locate additional archived assay certificates, in order to build a comprehensive database and undertake further analysis of the distribution and grade of antimony throughout the Project. 

Crucero Project

The Crucero Project (see Figure 1) is located in the Andes mountain range in Carabaya Province, in southeastern Peru. The village of Caserio de Oscoroque is located approximately 10 km to the west of the Project by road, and the nearest major community is the city of Juliaca, about 150 km to the south-southwest, which has an airport that provides domestic flights that connect throughout Peru.

The Project contains orogenic gold mineralization that is associated with pyrite, pyrrhotite, arsenopyrite and stibnite mineralization. The mineralization is contained within altered meta-sedimentary rocks belonging to the Ananea Formation of Lower Paleozoic age.

Exploration programs from 1996 to 2012 by previous operators included geological mapping, soil and rock geochemistry, trenching, surface geophysical surveys, diamond drilling and metallurgical testwork. Drilling across the Project totals 79 core holes for 24,705 metres completed from 2003 to 2012.

To date, exploration of the Project has concentrated on the A1 Zone which dips vertically to steeply to the east, is approximately 750 metres along strike by 100 metres in width and is traced to a vertical depth of approximately 400 metres. The A1 Zone is hosted within meta-sediments (mudstones and siltstones) of the Ananea Group. Pyrite is the most abundant sulphide mineral and typically occurs as blebs, the distribution of which commonly appears to be along foliation or bedding. Quartz veins are uncommon and are not necessarily gold-bearing, although the highest-grade gold found to date is within quartz veins with stibnite.

Prior geological studies have interpreted that the A1 Zone has been subjected to two phases of gold mineralization of which the major gold-mineralizing event formed during isoclinal folding, is largely conformable with bedding and is associated primarily with pyrite and pyrrhotite. The second phase of gold mineralization is associated with later deformation characterized by brittle deformation that resulted in the development of faulting and remobilization of gold that is associated with arsenopyrite and antimony mineralization. This later phase of gold mineralization is volumetrically minor compared to the first phase; however, it is more significant because the higher gold and antimony grades occur with this later phase.

For further information regarding the Crucero Project, please refer to the technical report summary titled "43-101 Technical Report, Crucero Property, Carabaya Province, Peru" with an effective date of December 20, 2017, (the "Technical Report"), available under the Company's profile at www.sedarplus.ca.

Table 1 – Crucero Project historical drill assay intercepts. Bold intervals correspond with those reported in the 'highlights' section above.

Hole Number	Interval From (m)	Interval To (m)	Core Length (m)	Gold Grade (g/t)	Antimony Grade (%)	AuEq (g/t)*
CPC 10-1	4.00	137.10	133.10	1.58	0.13	2.03
including	49.00	73.00	24.00	2.27	0.56	4.23
CPC 10-2	27.50	97.50	70.00	0.86	0.03	0.96
CPC 10-3	72.00	160.00	88.00	1.54	0.20	2.25
including	110.00	120.00	10.00	2.75	0.54	4.65
DDH-06	52.00	54.00	2.00	4.21	0.00	4.21
DDH-07	49.00	51.00	2.00	3.72	7.58	30.41
including	50.00	50.40	0.40	14.90	30.90	123.67
Also	124.00	162.00	38.00	0.74	0.08	1.03
DDH-08	134.00	151.46	17.46	5.11	0.00	5.11
including	139.00	141.00	2.00	34.50	0.01	34.53
Also	160.00	202.00	42.00	0.82	0.31	1.91
including	174.00	190.00	16.00	1.39	0.80	4.19
Also	214.00	298.00	84.00	0.38	0.14	0.88
including	218.00	243.00	25.00	0.18	0.46	1.80
DDH-09	109.00	141.00	32.00	1.54	0.01	1.56
Also	152.90	206.00	53.10	1.42	0.51	3.21
DDH-18	No Significant Intercept
DDH-19	143.00	179.00	36.00	1.55	0.03	1.66
Also	199.00	275.00	76.00	1.58	0.09	1.90
including	202.00	250.00	48.00	2.09	0.14	2.60
including	232.00	233.00	1.00	13.38	2.51	22.22
Also	356.00	378.00	22.00	0.77	0.12	1.18
Also	408.00	460.00	52.00	0.68	0.25	1.56
including	414.00	427.00	13.00	0.50	0.97	3.93
DDH-20	63.00	70.00	7.00	4.34	0.01	4.37
Also	78.00	86.00	8.00	1.15	0.06	1.34
Also	146.00	155.00	9.00	1.32	0.12	1.73
Also	163.00	180.00	17.00	1.71	0.01	1.75
Also	190.00	201.00	11.00	2.86	0.37	4.14
Also	318.00	352.00	34.00	0.76	0.01	0.79
Also	363.00	392.00	29.00	0.80	0.03	0.91
DDH-21	80.00	102.80	22.80	1.58	0.18	2.21
Also	114.00	207.00	93.00	1.25	0.02	1.32
Also	235.00	288.00	53.00	0.61	0.04	0.75
Also	323.00	338.05	15.05	1.39	0.00	1.39
DDH-23	49.00	86.00	37.00	1.07	0.04	1.20
DDH-24	108.00	215.00	107.00	1.44	0.31	2.54
including	132.00	141.00	9.00	1.46	0.95	4.80
including	189.00	209.00	20.00	0.98	0.98	4.43
DDH-26	119.00	159.00	40.00	1.77	0.10	2.12
and	185.00	206.00	21.00	1.21	0.01	1.23
DDH-27	133.00	189.00	56.00	2.06	0.55	4.01
including	139.00	144.00	5.00	1.97	1.55	7.43
including	150.00	162.00	12.00	2.47	1.61	8.14
Also	202.00	237.00	35.00	1.02	0.01	1.04
DDH-31	3.55	70.00	66.45	1.32	0.16	1.88
including	4.00	33.00	29.00	1.67	0.36	2.93
DDH-32	No Significant Intercept
DDH-33	223.00	233.00	10.00	0.99	0.04	1.14
Also	248.00	275.00	27.00	0.87	0.01	0.90
Also	413.00	448.00	35.00	0.82	0.01	0.86
DDH-34	385.00	405.00	20.00	1.88	1.24	6.25
including	393.00	404.00	11.00	2.65	2.13	10.15
DDH-35	35.00	43.00	8.00	0.93	0.10	1.27
Also	94.00	110.00	16.00	1.27	0.00	1.27
Also	136.00	188.00	52.00	1.62	0.33	2.78
including	142.00	179.00	37.00	1.84	0.45	3.43

Notes:

Mineralized intercepts are estimated to be approximately two-thirds of true width.

*AuEq is calculated using the formula AuEq (g/t) = Au grade (g/t) + 3.52 * Sb grade (%), Uses – Au price of $2,200/oz and Sb price of $35,600/tonne (both approximately 35% below current spot). Reports gold recovery at 100% but uses a notional recovery of the Antimony of 70%.

Table 2 – Crucero Project drill hole collar location coordinates for historical drill hole intercepts detailed in Table 1.

Hole Number	Easting Metres (UTM Zone 19S)	Northing Metres (UTM Zone 19S)	Elevation (m above sea level)	Depth (m)	Azi°	Dip°	Year Drilled
CPC 10-1	411013	8432920	4452.1	137.1	236	-45	2010
CPC 10-2	410769	8433177	4457.2	101.1	233	-45	2010
CPC 10-3	410799	8433199	4454.0	182.9	234	-60	2010
DDH-06	410513	8433320	4407.1	134.5	231	-45	2009
DDH-07	410510	8433320	4407.1	315	75	-45	2009
DDH-08	410583	8433156	4401.9	361.6	56	-45	2009
DDH-09	410771	8432933	4468.5	312.4	52	-45	2009
DDH-18	410480	8432832	4475.5	313.9	233	-45	2011
DDH-19	410829	8432889	4453.8	480.4	238	-45	2012
DDH-20	410841	8432818	4450.0	470	72	-44	2012
DDH-21	410870	8432865	4451.5	338	63	-46	2011
DDH-23	410810	8433100	4487.2	155	235	-45	2010
DDH-24	410733	8433011	4467.3	250	56	-45	2011
DDH-26	410879	8432867	4451.0	300	60	-60	2010
DDH-27	411031	8433011	4465.3	260	240	-45	2010
DDH-31	411013	8432920	4451.6	92.1	180	-60	2011
DDH-32	410942	8433220	4487.3	400	238	-75	2011
DDH-33	410766	8432774	4448.0	586.8	67	-45	2012
DDH-34	410452	8433156	4398.0	551	56	-56	2012
DDH-35	410797	8432935	4459.9	256	63	-45	2011

Data Verification

The Technical Report and the Company's historic exploration database, including verification of laboratory certificates, were used to verify the reported assay intercepts. As detailed in the Technical Report, Crucero Project drill core sampling program comprised the following procedure: prior to processing, core was photographed and measured for core loss, then logged geologically and marked for sampling. Sample lengths downhole were generally 1.0 metres within visually mineralized core, to 2.0 metres outside mineralized zones, except where samples were taken to honor geological contacts. Samples were obtained by sawing the core in half; half was placed in a numbered sample bag and the other half stored in the core box for reference. Normal security measures were taken throughout the sampling and shipping processes. All drill programs used standards, duplicates and blanks that were introduced into the sample stream on the Property during the sample preparation process, and/or introduced by the independent laboratory during the analysis. The sampled half-core was then sent for assay to either ALS Peru S.A. ("ALS"), or SGS del Peru S.A.C. ("SGS"), each an independent assay laboratory.

SGS completed sample analysis in Lima, Peru, for drill holes DDH-19, DDH-20, DDH-32, DDH-33, DDH-34 (this release). Analysis utilized four standard SGS analytical procedures: 1) gold was analyzed by fire assay of a 50-gram aliquot with an atomic absorption finish (FAA515); 2) if the sample contained more than 500 ppb gold the sample was re-analyzed using fire assay and a gravimetric finish (FAG505); 3) samples were also analyzed for a 33-element package using four-acid digestion and inductively coupled plasma (ICP) with an atomic emission spectroscopy (AES) finish (ICP40B); and 4) if the sample contained more than 10,000 ppb arsenic or antimony, these elements were analyzed using atomic absorption (AAS41b).

ALS Global completed sample preparation and analysis in Lima, Peru, for drill holes CPC 10-1, CPC 10-2, CPC10-3, DDH-05, DDH-06, DDH-07, DDH-08, DDH-09, DDH-10, DDH-18, DDH-21, DDH-23, DDH-24, DDH-26, DDH-27, DDH-31, DDH-35 (this release). Analysis utilized four standard ALS analytical procedures: 1) gold analyses were completed by fire assay fusion with AAS finish (Au-AA24 method) on 50 grams test weight; 2) if the sample contained more than 10,000 ppb gold the sample was re-analyzed using fire assay and a gravimetric finish (Au-GRA21); 3) antimony and other multi element analyses (total suite of 35 elements) were assayed by aqua regia digestion and ICP-MS analysis (ME-ICP41 method) on 0.25 grams test weight; and 4) antimony which assayed at the upper level of detection of 10,000 ppm, was generally re-assayed to percent level analysis via atomic absorption spectrometry (Sb-AA08 method).

Qualified Person

Tim Smith, P. Geo., Vice President Exploration of GoldMining, has supervised the preparation of, and verified and approved, all other scientific and technical information herein this news release. Mr. Smith is also a qualified person as defined in National Instrument 43-101 – Standards of Disclosure for Mineral Projects ("NI 43-101").

About GoldMining Inc.

GoldMining Inc. is a public mineral exploration company focused on acquiring and developing gold assets in the Americas. Through its disciplined acquisition strategy, GoldMining now controls a diversified portfolio of resource-stage gold and gold-copper projects in Canada, the U.S.A., Brazil, Colombia, and Peru. The Company also owns approximately 21.5 million shares of Gold Royalty Corp. (NYSE American: GROY), 9.9 million shares of U.S. GoldMining Inc. (Nasdaq: USGO) and 26 million shares of NevGold Corp. (TSXV: NAU). See www.goldmining.com for additional information.

Notice to Readers

Technical disclosure regarding the Project has been prepared by the Company in accordance with NI 43-101. NI 43-101 is a rule of the Canadian Securities Administrators which establishes standards for all public disclosure an issuer makes of scientific and technical information concerning mineral projects.  These standards differ from the requirements of the U.S. Securities and Exchange Commission ("SEC") and the scientific and technical information contained in this news release may not be comparable to similar information disclosed by domestic United States companies subject to the SEC's reporting and disclosure requirements.

Cautionary Statement on Forward-looking Statements

Certain of the information contained in this news release constitutes "forward-looking information" and "forward-looking statements" within the meaning of applicable Canadian and U.S. securities laws ("forward-looking statements"), which involve known and unknown risks, uncertainties and other factors that may cause the Company's actual results, performance and achievements to be materially different from the results, performance or achievements expressed or implied therein. Forward-looking statements, which are all statements other than statements of historical fact, include, but are not limited to, statements respecting the Company's expectations regarding the Project, the potential and demand for antimony and expected work programs and often contain words such as "anticipate", "intend", "plan", "will", "would", estimate", "expect", "believe", "potential" and variations of such terms. Such forward-looking statements are based on the then-current expectations, beliefs, assumptions, estimates and forecasts about the business and the markets in which GoldMining operates, which may prove to be incorrect. Investors are cautioned that forward-looking statements involve risks and uncertainties, including, without limitation: the inherent risks involved in the exploration and development of mineral properties, fluctuating metal prices, unanticipated costs and expenses, risks related to government and environmental regulation, social, permitting and licensing matters, any inability to complete work programs as expected, the Company's plans with respect to the Project may change as a result of further planning or otherwise,  and uncertainties relating to the availability and costs of financing needed in the future. These risks, as well as others, including those set forth in GoldMiningꞌs most recent Annual Information Form and other filings with Canadian securities regulators and the SEC, could cause actual results and events to vary significantly. Accordingly, readers should not place undue reliance on forward-looking statements. There can be no assurance that forward-looking statements, or the material factors or assumptions used to develop such forward-looking statements, will prove to be accurate. The Company does not undertake to update any forward-looking statements, except in accordance with applicable securities law.

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FAQ

What are the most significant gold-antimony drill results from GLDG's Crucero Project?

The most significant results include 4.01 g/t AuEq over 56 metres (2.06 g/t Au & 0.55% Sb), 2.54 g/t AuEq over 107 metres (1.44 g/t Au & 0.31% Sb), and 30.41 g/t AuEq over 2 metres (3.72 g/t Au & 7.58% Sb).

Where is GoldMining's Crucero Project located and what is its infrastructure?

The Crucero Project is located in the Andes mountains in Carabaya Province, Peru, approximately 150 km from Juliaca city which has an airport. The nearest village, Caserio de Oscoroque, is 10 km away by road.

What is the extent of drilling and exploration at GLDG's Crucero Project?

The project has 79 core holes totaling 24,705 metres drilled from 2003 to 2012, plus 657 trench assays. The database contains over 17,000 assay records, with 13,296 having independent laboratory certificates.

How is gold mineralization characterized at GLDG's Crucero Project?

The project shows two phases of gold mineralization: the major phase formed during isoclinal folding with pyrite and pyrrhotite, and a later phase associated with faulting and higher-grade gold-antimony mineralization.

What are the dimensions of the A1 Zone at GLDG's Crucero Project?

The A1 Zone extends approximately 750 metres along strike, is 100 metres in width, and has been traced to a vertical depth of approximately 400 metres.