Abstract
1. The geomorphic studies of known ore deposits of Miocene mineralization in Hokkaido and other parts of Japan have led us to the recognition of topographic similarity in their vicinities, represented by the erosion remnants of mineralization.
2. The typical erosion remnants in many places of the Miocene mineralized areas are summarized as follows : (1) square-topped hills having cross-shaped four erosion valleys ; and (2) the erosion valleys surrounding the hills, showing a pattern as seen in anticlined or domed areas.
3. The factors producing such topographic remnant are ; (1) The upheaval movement accompanied by mineralization, and (2) the rock alteration resulting in the selective erosion.
4. The areas of similar topography to the mineralization remnants are marked on 1 : 50, 000 maps, with reference to geological maps, and the reconnaissance routs to reach those areas have revealed presence of many new ore deposits.
5. Thus, the topographic remnants used in locating ore deposits in virgin areas of Hokkaido have proved to be very efficient in the field work of mining geologists.
