Sierra madre commences mining at Coloso, expanding mining operations
(PresseBox) - Sierra Madre Gold and Silver Ltd. (TSXV: SM) (OTCQX: SMDRF) ("Sierra Madre" or the "Company" - https://www.commodity-tv.com/ondemand/companies/profil/sierra-madre-gold-silver/) is pleased to announce the commencement of underground mining at the Coloso mine, located within the producing Guitarra Complex, State of Mexico, Mexico.
The Coloso silver-gold mine is located 4 kilometers northwest of the Guitarra processing plant.? Coloso was developed and mined by First Majestic Silver from 2014 to 2018. The mine has over 12 kilometers of underground workings. This underground development has allowed Sierra Madre to restart the Coloso mine with minimal pre-production expenditures and 7 months ahead of schedule.
Greg Liller, Chief Operating Officer, comments, ??This marks another milestone event in the restart of the Guitarra Mine Complex. The Coloso estimated resource grades are on average 1.7 times higher in silver and 1.2 times higher in gold compared to the Guitarra veins. As the widths of the veins vary from less than 1 meter to over 2 meters, ramp up mining will employ various mining methods and blasting techniques to determine the best combination of mining method costs versus grade dilution.?"
Mr Liller continued, ??In conjunction with processing of Coloso material, the company has hired a degreed metallurgist with extensive flotation experience as Process Plant Superintendent. Their goal will be to determine the best ratio of Coloso to Guitarra mill feed material to achieve maximum economic benefit. During the ramp up of Coloso mining, various blending percentages for mill feed will be tested to ascertain best recovery procedures.?"
Mining has started on the Jessica vein system and stope development in the Joya Larga system is underway. Operations have commenced at a rate of 50 tonnes per day of mineralized material, and will ramp up to 150 tonnes per day by year end; these tonnages would replace some of the mill feed currently sourced from the Guitarra mine while the processing plant continues to operate at a rate of 500 t/d.
The average indicated grade of the 2023 Coloso resource estimate is 221 g/t silver and gold 1.61 g/t (432,000 indicated tonnes grading 221 g/t silver and 1.61 g/t gold), compared to the Guitarra vein averages of 123 g/t silver and 1.25 g/t gold (1,649,000 indicated tonnes grading 123 g/t silver and 1.25 g/t gold). Please refer to press release dated December 15, 2023 https://sierramadregoldandsilver.com/read/auto-news-1702685145 and the NI 43-101 La Guitarra Resource Estimate for details).
Unternehmensinformation / Kurzprofil:
Datum: 29.04.2025 - 09:52 Uhr
Sprache: Deutsch
News-ID 721062
Anzahl Zeichen: 0
contact information:
Contact person: Marc Ollinger
Town:
Vancouver, British Columbia
Phone: +41 (71) 354-8501
Kategorie:
Financial Services & Insurance
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