Transatlantic Samples 36.1% Cu over 2.6 metres at Monitor Project - Big Elk Prospect
Transatlantic Mining Corp. (TSXV: TCO) has reported significant exploration results from its Monitor Copper-Gold Project near Taft, Idaho. The company's surface sampling at the Big Elk prospect revealed exceptional high-grade copper mineralization, with one outcrop sample returning 36.1% Cu over 2.6 metres and another gossanous sample yielding 6.6% Cu.
The company completed 14 drill holes totaling 1,100 metres at Big Elk, with ten holes intersecting historical mining voids. While no new vein material was encountered, the drilling successfully confirmed the geometry of the mineralized structures. The mineralization occurs in steeply dipping fissure veins within a prominent shear zone, trending N40W to N70W, characteristic of the Coeur d'Alene mining district.
The company is currently integrating new magnetic survey results and Lidar data into an updated NI 43-101 report for the Monitor Project to guide future exploration efforts.
Transatlantic Mining Corp. (TSXV: TCO) ha comunicato risultati significativi dall'esplorazione del suo progetto Monitor Copper-Gold vicino a Taft, Idaho. I campionamenti superficiali presso il sito Big Elk hanno evidenziato una mineralizzazione di rame ad alto tenore, con un campione di affioramento che ha riportato un eccezionale 36,1% di Cu su 2,6 metri e un altro campione gossanoso con 6,6% di Cu.
L'azienda ha completato 14 fori di sondaggio per un totale di 1.100 metri a Big Elk, di cui dieci hanno intercettato vuoti minerari storici. Sebbene non siano stati trovati nuovi filoni, la perforazione ha confermato con successo la geometria delle strutture mineralizzate. La mineralizzazione si presenta in vene fessurali inclinate ripidamente all'interno di una zona di taglio prominente, con direzione da N40W a N70W, tipica del distretto minerario di Coeur d'Alene.
Attualmente l'azienda sta integrando i nuovi risultati delle indagini magnetiche e i dati Lidar in un aggiornamento del rapporto NI 43-101 per il progetto Monitor, al fine di guidare le future attivit脿 esplorative.
Transatlantic Mining Corp. (TSXV: TCO) ha informado resultados significativos de exploraci贸n en su proyecto Monitor Copper-Gold cerca de Taft, Idaho. El muestreo superficial en el prospecto Big Elk revel贸 una mineralizaci贸n de cobre de alta ley, con una muestra de afloramiento que arroj贸 un excepcional 36,1% de Cu sobre 2,6 metros y otra muestra gossanosa con 6,6% de Cu.
La compa帽铆a complet贸 14 perforaciones que suman 1.100 metros en Big Elk, con diez de ellas intersectando vac铆os mineros hist贸ricos. Aunque no se encontraron nuevos filones, la perforaci贸n confirm贸 con 茅xito la geometr铆a de las estructuras mineralizadas. La mineralizaci贸n se presenta en vetas fisuradas con fuerte inclinaci贸n dentro de una zona de cizalla prominente, con una orientaci贸n de N40W a N70W, caracter铆stica del distrito minero de Coeur d'Alene.
Actualmente, la empresa est谩 integrando los nuevos resultados de las encuestas magn茅ticas y los datos Lidar en un informe actualizado NI 43-101 para el proyecto Monitor, con el fin de guiar futuros esfuerzos de exploraci贸n.
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Transatlantic Mining Corp. (TSXV : TCO) a annonc茅 des r茅sultats d'exploration significatifs pour son projet Monitor Copper-Gold pr猫s de Taft, Idaho. Les 茅chantillons de surface au prospect Big Elk ont r茅v茅l茅 une min茅ralisation en cuivre 脿 haute teneur, avec un 茅chantillon d'affleurement affichant 36,1% Cu sur 2,6 m猫tres et un autre 茅chantillon gossanis茅 pr茅sentant 6,6% Cu.
L'entreprise a r茅alis茅 14 forages totalisant 1 100 m猫tres 脿 Big Elk, dont dix ont intercept茅 des vides miniers historiques. Bien qu'aucun nouveau filon n'ait 茅t茅 rencontr茅, le forage a permis de confirmer la g茅om茅trie des structures min茅ralis茅es. La min茅ralisation se trouve dans des veines fissur茅es 脿 fort pendage au sein d'une zone de cisaillement marqu茅e, orient茅e de N40W 脿 N70W, caract茅ristique du district minier de Coeur d'Alene.
L'entreprise int猫gre actuellement les nouveaux r茅sultats des relev茅s magn茅tiques et les donn茅es Lidar dans un rapport NI 43-101 mis 脿 jour pour le projet Monitor, afin d'orienter les futures op茅rations d'exploration.
Transatlantic Mining Corp. (TSXV: TCO) hat bedeutende Explorationsergebnisse von seinem Monitor Kupfer-Gold-Projekt nahe Taft, Idaho, bekannt gegeben. Die Oberfl盲chenproben am Big Elk-Vorkommen zeigten au脽ergew枚hnlich hochgradige Kupfermineralisierung, wobei eine Aufschlussprobe 36,1% Cu 眉ber 2,6 Meter und eine weitere gossanartige Probe 6,6% Cu ergab.
Das Unternehmen hat 14 Bohrl枚cher mit insgesamt 1.100 Metern am Big Elk abgeschlossen, von denen zehn historische Bergbauhohlr盲ume durchteuften. Obwohl keine neuen Adernmaterialien angetroffen wurden, best盲tigte die Bohrung erfolgreich die Geometrie der mineralisierten Strukturen. Die Mineralisierung tritt in steil einfallenden Spaltadern innerhalb einer markanten Scherzonen auf, die von N40W bis N70W verlaufen, charakteristisch f眉r den Bergbaubezirk Coeur d'Alene.
Das Unternehmen integriert derzeit neue magnetische Vermessungsergebnisse und Lidar-Daten in einen aktualisierten NI 43-101 Bericht f眉r das Monitor-Projekt, um zuk眉nftige Erkundungsaktivit盲ten zu steuern.
- High-grade copper mineralization confirmed with 36.1% Cu over 2.6 metres in surface sampling
- Successful validation of mineralized structure geometry through drilling program
- Multiple copper fissure veins identified within the claim block
- Integration of new magnetic survey and Lidar data strengthening exploration targeting
- Initial drilling did not intersect new vein material or yield positive analytical results
- Four exploration holes encountered no visible mineralization
- Lack of historical mine plans at Big Elk prospect limiting historical context
- One drill hole (BEP_14) was abandoned incomplete
Vancouver, British Columbia--(Newsfile Corp. - July 14, 2025) - Transatlantic Mining Corp. (TSXV: TCO) (the "Company") is pleased to provide an update on its exploration activities at the Big Elk and Anvil prospects, key targets within the larger Monitor Copper-Gold Project. The project is located approximately 8 kilometers south of Taft, Idaho, USA and continues to demonstrate prospectivity.
Highlights of the Exploration Program:
High-Grade Surface Samples at Big Elk: An outcrop sample returned
36.1% copper (Cu) over 2.6 metres, with another gossanous sample yielding6.6% Cu, confirming significant mineralization.Drilling Validates Targeting: Initial 1,100 metres of drilling confirmed the geometry of known mineralized structures, including intersecting historical workings, which provides critical insights for future targeting.
Anvil Prospect Potential: Recent underground samples at Anvil indicate multiple copper fissure veins within a complex system.
"We are very pleased with the successful outcomes of our exploration at Big Elk, which has confirmed our geological understanding and the presence of copper mineralization," said Bernie Sostak, CEO of Transatlantic Mining. "Our initial magnetic survey results and new Lidar data are providing compelling insights, supporting delineation of fissure veins and offering a clearer picture of the historical workings. This comprehensive information, covering both Big Elk and Anvil, is actively being integrated into an updated NI 43-101 report for the Monitor Project, positioning us strongly for our next targeted drill campaign and the discovery of additional veins within the claim package."
Webinar:
Transatlantic CEO Bernie Sostak will host an interactive webinar discussing the company's exploration programs and future plans on Wednesday, July 16, 2025, at 9:am PT. Register in advance for this meeting via the following link:
Geology and Mineralization
At the Big Elk prospect, copper mineralization is found within steeply dipping fissure veins that form along second-order structures within a prominent shear zone, trending approximately N40W to N70W. These veins, typically up to 1.8 metres wide, are characteristic of the broader Coeur d'Alene mining district. In this eastern and southeastern part of the district, where the Monitor Project is situated, veins are typically copper-rich with reduced silver, lead, and zinc content, suggesting formation under higher-temperature conditions or closer proximity to the hydrothermal source. These copper-rich veins are generally less than 5 meters wide, extend to significant depths, and primarily contain chalcopyrite, pyrite, calcite, siderite, and quartz. Hydrothermal alteration, notably pervasive siderite zoning and bleaching, is a defining characteristic of the mineralized zones, with disseminated siderite sometimes extending hundreds of meters into the wall rocks.
Exploration Results
Building on this geological understanding, the Company conducted a systematic exploration program, implementing industry best practices to confirm the property's geological and mineralogical characteristics.
Initial surface sampling at the Big Elk prospect yielded encouraging copper results. An outcrop sample excavated next to a historic shaft returned
Figure 1: High-grade copper showing from the Big Elk Prospect at Transatlantic Mining's Monitor Project.
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The initial drill program at Big Elk comprised fourteen holes totaling 1,100 metres, designed to test copper anomalism found on earlier surface geological reconnaissance and further confirm the orientation of the mineralized system. Hole depths ranged from 21 metres to 111 metres in 14 holes. Ten of these holes intersected voids where historical mining had taken place, providing valuable insights into the geometry and continuity of the veins. While the drilling did not intersect new vein material to yield positive analytical results, it successfully confirmed the geometry (strike and dip) of the vein system mined along the Big Elk workings, providing essential data for the planning of subsequent drilling campaigns (Figures 2 and 3). Four exploration holes did not encounter visible mineralization and were not sampled. There are no historical mine plans at the Big Elk prospect, and the drilling was targeting the uncovered subcrop to determine extensions along strike and down dip. All samples collected were subsequently sent to Christofferson Labs, LLC. in Smelterville, Idaho, USA for analysis of gold and then to American Analytical Laboratories in Osburn, Idaho for an ICP analysis.
Figure 2: Map of the Big Elk Prospect, a subset of the Monitor Project
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Figure 3: Map of the Big Elk Prospect, a subset of the Monitor Project (Table 1,2)
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Overall, the Company's exploration efforts confirmed the strike and dip of the vein mined along the Big Elk workings. Surface samples indicate the veins contain copper mineralization. Furthermore, through mapping and sampling of the Anvil working, the Company has identified additional veins within the claim block. Both the Big Elk and Anvil prospects represent historical workings on fissure veins within the larger shear zone, confirming the presence of multiple veins within the shear zone that encompasses the entire project.
Sampling, Analysis, and Quality Assurance/Quality Control (QA/QC)
All samples, including those from surface across the Big Elk Vein subcrop and remnant copper mineralization in the outlying dump area (Table 1), as well as drilling, were sent to Christofferson Labs, LLC in Smelterville, Idaho, USA for gold analysis. Subsequent ICP analysis was performed at American Analytical Laboratories in Osburn, ID. All drilling and sampling results for the Big Elk prospect are detailed in Table 2. All analytical procedures adhered to industry-standard protocols, and results have passed internal QA/QC checks.
Table 1: Surface Sampling across subcrop Big Elk Vein
| Sample ID | Sample Type | From (m) | To (m) | Length (m) | True Width (m) | Cu % | Au g/t | Ag g/t | Description |
| MON_231019_1 | channel | 0 | 2.6 | 2.6 | 2.4 | 36.1 | 0.93 | 29.55 | Big Elk shear vein subsurface outcrop |
| MON_230808_1 | dump* | N/A | N/A | N/A | N/A | 6.6 | 0.14 | 5.1 | Gossanous copper/iron at dump on Big Elk drill pad |
| *Surface rock grab samples, such as those described herein, are selective by nature and are not necessarily indicative of average grades or the full extent of mineralization. | |||||||||
Table 2: Drill hole summary from Big Elk drilling
| Hole ID | Number of Samples Assayed | From (m) | To (m) | Downhole Length (m) | True Width (m) | Intersection | Target |
| BEP_01 | 5 | 22.9 | 25.1 | 2.2 | 2.2 | Stope | Big Elk Vein |
| BEP_02 | 11 | No Significant Intersection | Big Elk Vein | ||||
| BEP_03 | 11 | No Significant Intersection | Big Elk Vein | ||||
| BEP_04 | 4 | 8.8 | 11.3 | 2.5 | 2.5 | Stope | Big Elk Vein |
| BEP_05 | 8 | No Significant Intersection | Big Elk Vein | ||||
| BEP_06 | 1 | 23.2 | 24.7 | 1.5 | 1.5 | Stope | Big Elk Vein |
| BEP_07 | 3 | 18.9 | 20.7 | 1.8 | 1.8 | Stope | Big Elk Vein |
| BEP_08 | 3 | 16.5 | 17.4 | 0.9 | 0.9 | Stope | Big Elk Vein |
| BEP_09 | 6 | 23.2 | 23.8 | 0.6 | 0.6 | Stope | Big Elk Vein |
| BEP_10 | 10 | No Significant Intersection | Big Elk Vein | ||||
| BEP_11 | N/A | No Sample | Exploration Hole | ||||
| BEP_12 | N/A | No Sample | Exploration Hole | ||||
| BEP_13 | N/A | No Sample | Exploration Hole | ||||
| BEP_14 | N/A | No Sample | Hole Abandoned, Incomplete |
See also,
*NI43-101 :Copper-Gold-Silver Mineralization at the Monitor Mine Property, Eastern Coeur d'Alene Mining District, Shoshone County, Idaho, USA.,( Ray July 2013) and
* New Release May 1, 2017
About the Monitor Claim Group:
Transatlantic Mining has numerous prospects within the greater Monitor Copper-Gold Project. At the historical Monitor mine, historical grades of up to
Qualified Person Review:
The technical information contained in this news release has been reviewed and approved by Zachary J. Black, SME-RM, a Principal for Ethos Geological Inc., who is a Qualified Person pursuant to National Instrument 43-101.
About Transatlantic Mining Corp.
Transatlantic Mining (TSXV: TCO) is an emerging precious and base metal explorer. The Company has a focus on converting projects into mines within stable mining jurisdictions. The Company currently holds property interests including an
Cautionary Statement Regarding Forward-Looking Statements
This news release contains "forward-looking statements" within the meaning of Canadian securities legislation. These forward-looking statements include, but are not limited to, statements regarding the Company's future exploration plans, geophysical programs, and the potential for mineralization. Forward-looking statements are subject to known and unknown risks, uncertainties, and other factors that may cause the actual results, level of activity, performance, or achievements of the Company to be materially different from those expressed or implied by such forward-looking statements. These factors include, but are not limited to, risks associated with the exploration and development of mineral properties, the Company's ability to obtain necessary permits, and the availability of financing. Readers are cautioned not to place undue reliance on forward-looking statements. The Company undertakes no obligation to update or revise any forward-looking statements, except as required by law.
For further information, please contact: Bernie Sostak: [email protected] , +61 (0) 439 904 044,
Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.
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FAQ
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