Man injured in Republic target practice explosion

MARQUETTE – A 60-year-old Bristol, Wis., man was seriously injured in an accidental explosion Saturday near Chief Lake in Republic Township, according to state police at the Negaunee post.

Troopers were dispatched at 1:28 p.m. (Eastern time) after the man was injured while mixing chemicals together from a product called Tannerite. The mixture exploded in his hands, causing severe injury to his hands and torso, troopers said.

The victim, John Groschopf, was in a gravel pit along with two juvenile males who were target shooting with firearms. Tannerite is used primarily as an explosive target that lets a shooter know a hit has been scored.

One of the teenage males received injury to his ears due to the loud blast.

Both juveniles transported Groschopf in an off-road vehicle from the gravel pit out to an ambulance from Bell Memorial Hospital that was waiting on the Fence River Road. Groschopf was transported to Marquette General Hospital.