Answer: In July 2011 the Madre De Dios region officially produced 2,089,908 grams, or 67,200 ounces of gold. At the July 2011 London Fix average price of U$1573/oz, that's worth U$105.7m.
July's production represents 14.91% of all the gold produced by Peru.
And remember, the above figures are only the OFFICIAL Peru Mining Ministry numbers and that unofficial production is normally estimated to be the same again, so take those numbers and double them to get the real picture. Though this below is the real picture of Madre De Dios (from this excellent photoseries):
¡VIVA INVESTMENT GRADE!