In 1999, Colin Barnett reviewed the progress of geophysical developments in the 20th century. Undeniably, major advances have taken place and are still taking place in parameters measured, accuracy, speed and data volume, display, and analytical software. This leads to the question: “How has all this progress affected the rate and efficiency of discovering ore deposits?”

This subject has been addressed by others. Bob Horn, in a provocative paper in Pathways '98, concluded that although luck has contributed to the discovery of many of the world's important deposits, technology has indeed resulted in greater exploration success and efficiency. After examining...

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