The Babbitt Deposit
The Babbitt copper-nickel deposit, or Mesaba Project, (formerly known as Minnamax) is located within troctolitic and gabbroic rocks in the basal section of the SE dipping northern margin of the northern part of the late Mesoproterozoic (1.1 Ga) Duluth Mafic Complex in Minnesota, USA. It differs for the Dunka Road deposit 10 km to the SW in that Babbitt has more massive sulphides and more platinum group elements.
The information of Babbitt is public and high quality. There's not only information about ore grades, but also about lithology and stratigraphical units.