1.1 Very little is known about the potential gold deposits in Madagascar, but the country's estimated gold production is far from negligible. It runs to approximately 3-4 t/y and "could easily be doubled" (Mining Annual Review - 1995, p 149).
This is a large amount considering that all of it presently comes from "artisan" mining - or very small syndicates - and mining is largely alluvial. Estimates of Madagascar's total gold production since it began late last century is a highly respectable 70 tonnes.
1.2. Madagascar's primary gold deposits are thought to be of mesothermal "lode" quartz-hosted type, and they are hosted in Proterozoic or, more frequently, Archean terrains. Lode gold deposits of this type account for nearly 20% of world deposits, and are largely responsible for the vigorous gold development of Australia, Canada, Brazil and Ghana.
There is no evidence in Madagascar of sediment-hosted gold deposits, pebble-conglomerate deposits, gold-rich porphyry copper deposits or epithermal gold deposits. Although their presence cannot be excluded given the current level of knowledge, their occurrence seems unlikely.
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