A recently discovered helium reservoir in Minnesota boasts “mind-bogglingly” high concentrations of the gas that are even greater than initially thought, potentially paving the way for commercial extraction.

Resource exploration company Pulsar Helium, Inc. announced the discovery of helium stores in late February, after a drill just outside of Babbitt, in northern Minnesota, located gas deposits at depths of 2,200 feet (670 meters). Initial measurements showed helium concentrations of 12.4% — which “is just a dream,” Thomas Abraham-James, the president and CEO of Pulsar Helium, told CBS News at the time. But new laboratory readings have surpassed those results.

Live Science

The find is special.

Normally, helium is obtained as a byproduct of natural gas production, as it accumulates underground in pockets of methane and other hydrocarbons. Minnesota is one of just a handful of locations globally where helium is known to exist without hydrocarbons — the others being in Greenland and southern and eastern Africa. These sites all feature a crust of granite rock rich in uranium and thorium, as well as a rift system that fractures the rock to expose the helium produced through radioactive decay. A dose of volcanism then releases helium atoms from the rock.

Northern Minnesota has a love/hate relationship with the extraction of natural resources from the ground. The article doesn’t address how mining methods affect, if at all, the environment.