This dataset includes five Esri grids representing the copper-nickel-platinum group element (Cu-Ni-PGE) mineralized zone found in the South Kawishiwi, Bathtub, and Partridge River intrusions, Duluth Complex, Minnesota. The data are also presented in .csv format to provide an open-source file type. We are using the term "basal mineralized zone" (bmz) as an informal term representing the mineralized units found in the South Kawishiwi, Bathtub, and Partridge River intrusions. The mineralized rock units located in the South Kawishiwi intrusion are collectively known as the Basal Mineralized Zone. However, the mineralized rock units found in the Bathtub and Partridge River intrusions do not have standardized names and consist of multiple informally named units, such as S1, S2, Unit 1, Unit 2. For simplicity, we are referring to the mineralized rocks of both intrusions as the "bmz". The five grids represent: 1) the elevation of the bottom of the bmz ("bmzbot" grid), 2) the elevation of the top of the bmz ("bmztop" grid), 3) the apparent thickness of the bmz ("appthk" grid), 4) the true thickness of the bmz calculated using the depth of the bottom of the bmz ("truthbot" grid), and 5) the true thickness of the bmz calculated using the depth of the top of the bmz ("truthtop" grid). All elevation and thickness values in the grids are in feet. These surfaces were created by interpolation using down-hole depth and lithologic data taken from drill hole logs. Also included is a shapefile representing the drill hole collar locations.
|Title||Surfaces representing the basal mineralized zone in the South Kawishiwi, Bathtub, and Partridge River Intrusions, Duluth Complex, Minnesota|
|Authors||Heather L Parks, Michael L Zientek|
|Product Type||Data Release|
|Record Source||USGS Digital Object Identifier Catalog|
|USGS Organization||Geology, Minerals, Energy, and Geophysics Science Center|