Metallic Deposits Settings (“Geosites”)

Geosciences, like politics, combine “facts” and ideas. Facts stay and last long, interpretations change with seasons. Academia prefers theories and hypotheses (nowadays “models”) some of which, like the geosynclinal theory, filled our minds for two generations, to end up on the trash heap of history. Mineral deposits had first been found by prospectors who knew little about genetic theories, but they crisscrossed the bush looking for visual indicators of ore presence. Increasing sophistication gave us the exploration industry where most new ore discoveries resulted from the search for “look-alikes”-close analogues of known major deposits. Empirically, we now know in which geological settings are certain types of metallic ores likely to occur and this knowledge is used by the industry to define prospective areas. I have called such distinct settings “geosites”, and the present book distinguish 142 of them, described on 700+ pages of text and graphs. Geotectonic setting of “geosites” is graphically presented in a wall poster, where geosites follow the geotectonic domains from oceans through continental margins, orogens, platforms and rifts into several anthropogenic settings. In a series of vertical columns in the poster the surficial and sea-floor settings on the top change into progressively deeper equivalents at the bottom. Although of older date, this book and poster have not much changed. They could be modified, updated, extended by the newly defined “geosites”, although there have been few identified recently.