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TSX.V: COCO

VANCOUVER, BC, Sept. 8, 2025 /CNW/ - Coast Copper Corp. ("Coast Copper" or the "Company"); (TSXV: COCO) is pleased to announce it has completed its initial historical compilation work and received results back from field programs at its 100% owned Copper Kettle property (the "Property"). After reviewing the historical data and conducting an initial property examination, the Company expanded the Property by acquiring a 100% interest in an additional 267 hectares ("ha") of ground adjacent to its existing Copper Kettle claim block from an arm's-length individual, increasing the total Property size to 2,849 ha. The Property is strategically located between the past-producing BHP Group Ltd. ("BHP") Island Copper mine¹ and Northisle Copper and Gold Inc.'s¹ North Island project on northern Vancouver Island and includes the Northwest Zone ("NW Zone") which forms the northwestern end of a greater than 10 kilometer ("km") long Island Copper cluster of porphyry copper ("Cu"), gold ("Au") and molybdenum ("Mo") deposits2.

Highlights in this News Release include:

• The NW Zone is part of the Island Copper cluster of mineral depositsas noted by BHP geologists,
• Significant mineralization over a large area in historical drilling has outlined a porphyry Cu-Mo system (NW Zone) over a strike length of 1,800 meters ("m") associated with a magnetic anomaly,
• Highlights from previous drilling includes 277.4 m assaying 0.20% Cu and 0.018% Mo in hole E-64, 91.5 m assaying 0.57% Cu and 0.017% Mo in hole E-69 and 88.4 m assaying 0.38% Cu and 0.029% Mo in hole W-6, 9 of these 17 drillholes ended in copper mineralization,
• Room for expansion of mineralization at depth and along strike: compilation and initial fieldwork conducted by Coast Copper indicates potential to extend mineralization not only at depth below the historical drillholes but onto ground that BHP did not control at the time,
• Compilation of surface geochemical data and recent sampling results show that glacial till masks the underlying mineralization noted in drilling, but sampling in areas where outcrop is not masked by tills has returned results greater than 200 parts per million ("ppm") Cu in soils and up to 1,800 ppm Cu in historical soil samples and many rock grab samples taken by Coast Copper in the 2% Cu range up to 5 km northwest of the NW Zone,
• Discovered a new multi-element mineralized skarn target north of the NW Zone,
• The 2025 soil program verified the historical copper soil anomaly north of the NW Zone, which has not been drill tested. The copper anomaly north of the NW Zone is 800 m by 400 m using a 200 ppm Cu cutoff.

Since the last update (March 24, 2025 news release), our team has reviewed historical data regarding the Property, including drilling by BHP between 1983-1989 totaling 31 diamond drillholes (9,072 m) and 10 percussion drillholes (789.5 m) and the northern Vancouver Island Geoscience project which was a collaboration between Geoscience BC and the Island Coastal Economic Trust. The definitive technical paper, authored by prominent BHP geologists, on the Island Copper Cluster of Mineral Deposits was published in 1996 in the Canadian Institute of Mining ("CIM") Special Volume 46: Porphyry Deposits of the Northwestern Cordillera of North America. Along with the past producing Island Copper mine and deposits still held under the mining lease by BHP, this paper also details the NW Zone (porphyry Cu-Mo system) now held by Coast Copper.

Adam Travis, CEO commented: "Our strategy of acquiring exploration projects is starting to pay dividends, having acquired a significant zone of mineralization on the doorstep of the past producing Island Copper mine. The significance of the NW Zone has been documented in a paper authored by distinguished BHP geologists and highlights the under explored and underappreciated nature of northern Vancouver Island where projects of this stature can be picked up for only staking costs! Several drillhole results returned very significant copper and molybdenum results in the 0.2-0.5% Cu range over 50-250 m intervals with many of them ending in mineralization. This is especially significant when the molybdenum grades are considered, which effectively doubles the copper equivalent grade. With this large area of mineralization noted across several drillholes, combined with broad intervals and several drillholes ending in copper mineralization, it's no wonder it was of significant interest to a major company like BHP, even at lower copper prices than we see today.

Although the main area of drilling is covered by gravels and by definition is a blind discovery, new exposures created by logging activity around the periphery of the NW Zone are also showing outcrop exposures with peripheral porphyry style alteration and mineralization such as pyritized volcanics with trace chalcopyrite to new skarn style mineralization indicating that the full extent of the porphyry system has not been fully defined and is larger than previously known."

Historical Compilation

NW Zone as summarized in CIM Special Volume 46 (1996)2: "The NW Zone is a large, mineralized porphyry Cu-Mo system where rhyodacite porphyry dikes similar in composition to those at Island Copper have been intersected in drilling over a strike length of more than 1,800 m. A strong, central magnetic anomaly is rimmed by a horseshoe shaped chargeability high which coincides with the zone and is explained by the moderate to high magnetite and pyrite contents zoned around the porphyry dikes. Copper skarns and porphyry Cu-Mo mineralization are also zonally distributed about the porphyry intrusions. The center contains abundant molybdenite in quartz pyrite veins and copper occurs as chalcopyrite veins."

NW Zone BHP Drilling 1983-1989: A review of the historical drilling indicates that it mostly consisted of relatively short vertical drillholes which returned significant results (greater than 0.2% Cu) over very broad intervals; see 17 highlighted drillholes in Table 1. More importantly, a detailed review of the drillhole logs and the assay database indicates that 9 of these 17 drillholes ended in copper mineralization. A 1987 report on drillhole E-69 noted upper skarn bands returning up to 2.93% Cu over 3 m and that "the hole was stopped 30 m into a mafic porphyry with patchy brown (biotite?) alteration3 which contains chalcopyrite and molybdenite with grades in the 0.2-0.3% Cu and 0.10-0.050% Mo ranges3."

Table 1: Historical Drilling4 5

Hole Id	Total Length (m)	From (m)	To (m)	Interval (m)	Au (g/t)	Ag (g/t)	Cu (%)	Mo (%)	Comment
E-60	185.3	73.8	184.4	110.6	-	-	0.15	0.010	Ends in mineralization
E-61	152.4	32.0	125.0	93.0	-	-	0.18	0.011	Ends in weak mineralization
including		39.6	73.2	33.6	-	-	0.24	0.013
E-62	152.4	44.8	152.4	107.6	-	-	0.15	0.020	Ends in mineralization
including		100.6	125.0	24.4	-	-	0.33	0.011
E-64	452.7	18.3	295.7	277.4	0.03	0.8	0.20	0.018	Ends in mineralization
including		137.2	292.6	155.4	0.05	1.2	0.24	0.029
and		408.4	429.8	21.3	0.01	1.0	0.12	0.020
E-65	202.1	152.7	192.0	39.3	0.02	1.5	0.21	0.010	Ends in mineralization
including		169.8	178.0	8.2	0.02	4.4	0.52	0.010
E-69	272.8	155.4	246.9	91.5	-	-	0.57	0.017	Ends in mineralization
including		176.8	192.0	15.2	0.01	9.6	1.19	0.012
including		218.8	234.7	15.9	0.02	9.6	1.02	0.011
E-88	281.6	128.0	281.6	153.6	0.01	0.9	0.13	0.016	Ends in mineralization
including		128.0	206.2	78.2	0.01	1.3	0.17	0.021
including		189.0	206.2	17.2	0.01	2.6	0.27	0.037
E-90	317.9	143.2	216.4	73.2	0.01	1.8	0.39	0.021
including		192.0	210.3	18.3	0.01	5.1	0.98	0.021
E-91	456.0	331.8	363.9	32.1	0.01	1.8	0.19	0.023
including		331.8	347.8	16.0	0.01	3.1	0.26	0.017
E-93	328.0	27.4	222.5	195.1	0.01	0.5	0.11	0.009
including		33.5	61.0	27.5	0.02	0.8	0.15	0.005
including		125.0	164.6	39.6	0.01	0.5	0.14	0.017
E-94	267.0	210.3	267.0	56.7	0.01	0.8	0.16	0.008	Ends in mineralization
including		231.6	267.0	35.4	0.01	0.9	0.21	0.010
E-95	304.8	3.0	274.3	271.3	0.01	1.0	0.18	0.024
including		161.5	216.4	54.9	0.02	1.8	0.32	0.022
E-96	246.3	28.6	237.7	209.1	0.03	0.8	0.17	0.014	Ends in weak mineralization
including		39.6	97.5	57.9	0.04	1.1	0.21	0.024
including		158.5	198.1	39.6	0.03	1.0	0.25	0.010
W-5	356.6	6.7	149.4	142.7	-	-	0.15	0.019	Ends in mineralization
including		64.0	97.5	33.5	-	-	0.19	0.018
and		207.3	295.7	88.4	0.02	3.4	0.38	0.029
including		253.0	289.6	36.6	0.03	6.9	0.73	0.028
including		256.0	268.2	12.2	0.03	9.5	1.31	0.013
W-6	456.6	106.1	438.9	332.8	0.01	0.8	0.15	0.036	Ends in mineralization
including		112.8	155.4	42.6	0.03	1.2	0.25	0.015
including		341.4	371.9	30.5	0.01	1.0	0.19	0.052
W-7	108.8	16.2	108.8	92.6	-< Investment Disclosure The content provided on this website and in Mine$tockers episodes is for informational purposes only and should not be considered as an offer, solicitation, recommendation, or determination by Mine$tockers Inc. for the sale of any financial product or service or the suitability of an investment strategy for any investor. Investors are advised to consult a financial professional to determine the appropriateness of an investment strategy based on their objectives, financial situation, investment horizon, and individual needs. This information is not intended to serve as financial, tax, legal, accounting, or other professional advice, as such advice should always be tailored to individual circumstances. The products discussed herein are not insured by any government agency and carry risks, including the potential loss of the principal amount invested. Any information provided is based on both internal and external sources and should not be construed as an endorsement or conclusion regarding a company's financial prospects, resources, or management. Opinions expressed may change and should not be relied upon. It is crucial to seek personalized investment advice for your unique situation. Natural resources investments are generally volatile, with higher headline risk than other sectors. They tend to be more sensitive to economic data, political and regulatory events, and underlying commodity prices. The prices of natural resources investments are influenced by factors such as the costs of underlying commodities like oil, gas, metals, and coal. These investments may trade on various exchanges and experience price fluctuations due to short-term demand, supply, and investment flows. Natural resource investments often respond more sensitively to global events and economic data, including natural disasters, political turmoil, pandemics, or the release of employment data. Investing in foreign markets may carry greater risks than domestic markets, including political, currency, economic, and market risks. It is essential to evaluate if trading in low-priced and international securities is appropriate for your circumstances and financial resources. Past performance does not guarantee future results. Mine$tockers Inc., its affiliates, family, friends, employees, associates, and others may hold positions in the securities it covers. Some of the companies covered may be paying clients of the production. No investment process is risk-free, and profitability is not guaranteed; investors may lose their entire investment. No investment strategy or risk management technique can guarantee returns or eliminate risk in any market environment. Diversification does not ensure a profit or protect against loss. Investing in foreign securities involves risks not associated with domestic investments, such as currency fluctuations, political and economic instability, and differing accounting standards, potentially leading to greater share price volatility. The prices of small- and mid-cap company stocks generally experience higher volatility than large-company stocks and may involve higher risks. Smaller companies may lack the management expertise, financial resources, product diversification, and competitive strengths needed to withstand adverse economic conditions. Studio Toronto Ontario Canada Email kevin@MineStockers.com Phone +1 (905) 967-2519