The company said the worker was struck by a rock while conducting scaling operations for underground development and unfortunately succumbed to his injuries while being airlifted to hospital.
Telson CEO Jose Antonio Berlanga offered condolences and sympathies to the man's family, friends and co-workers.
The mine was temporarily suspended but resumed operations after preliminary findings attributed the accident to human error.
Telson said a team from the Ministry of Economy's general mines department arrived on site on Friday to complete its investigations and the company also expected a visit from the Ministry of Labour's worker's compensation and safety arm this week.
Telson is advancing its two Mexican polymetallic projects, Tahueheuto and Campo Morado, towards commercial production this year.
Shares in Telson fell 1.43% to C69c but remain near the upper third of its 52-week range of 27c-89c.
