『 Research into the origin and distribution of manganese deposits has always occupied a small but important niche in economic geology. Of partcular value for the progress achieved in manganese deposit research was a succession of programs funded by the International Geological Correlation Programmes (IGCP). Through six of these IGCP projects international research collaboration was effectively supported from 1975 until 2002 (Table 1). These programs enabled a large number of scientists and postgraduate students from various continents and countries to interact with one another. Manganese ore deposits worldwide were investigated during field workshops and results were presented at numerous international conferences.
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