Within this context, New Union SpA submitted an income membership inquiry to the SEA for the modification of its Prospección Minera Relincho (Relincho Mining Exploration) project, which foresees an investment of around US$3.9 billion. This was approved by Exempt Resolution N ° 188/2011 of the Atacama Regional Environmental Commission.

Prospección Minera Relincho temporarily stopped its drilling and exploration activities in 2013 due to the reformulation of the overall mining project. The Chilean National Geology and Mining Service, SERNAGEOMIN, were informed of the stoppage in due course.