Gold miner Caledonia Mining Corp has increased third quarter production from its Blanket pit in Zimbabwe.Caledonia produced 12,042 ounces from the 49%-owned subsidiary in the three months to September 30th, 3.9% up on the 11,588 ounces in the second quarter.Total gold production for the nine months to September 30th was 34,103 ounces, 1.4% up on the first nine months of 2012.PW