| Abstract: | An existing lithogeochemical data file of more than 800 samples covering about 250 km2 of the east Amisk area was searched for potential pathfinder elements and rock types related to the known mineralization of the area (early Proterozoic Cu deposits of massive sulfide type). The data were studied in the form of summary statistics and chemically defined subfiles. Enhancement and depletion haloes and spatial relationships of rock types to known ore deposits were sought. Regional pathfinder haloes common to other studies or surveys of massive sulfide deposits (e.g., Na depletion) are not evident; however, the presence of depletion haloes of the immobile elements (i.e., Ti, Nb, Sr, Y, Zr) on a regional scale is demonstrated. It is concluded that the east Amisk area lithogeochemical data are different because of (a) the scale of the initial survey and (b) the environment of formation (and possibly age) of the volcanic host rocks. |
