近来由于加拿大纽芬兰海岸发现了石油,所以纽芬兰和拉布拉多的重晶石成为重要的工业矿物。加拿大的矿山公司在1980年经露天开采后,间断操作生产了大约9000吨重晶石。这个矿脉的厚度很大,平均厚度为1.5米,其品位大于95%(指含 BaSO_4而言)。但是储量预测小于30000吨。在纽芬兰中心的 Buchans 金属矿山,重晶石是铅—锌—铜—硫化 The recent discovery of oil on the Newfoundland coast of Canada has made Barite of Newfoundland and Labrador an important industrial mineral. After the Canadian mining company was open-cast in 1980, it operated intermittently and produced about 9,000 tons of barite. The thickness of this vein is very large, with an average thickness of 1.5 meters, and its grade is greater than 95% (in the case of BaSO4). However, reserves are expected to be less than 30,000 tons. In the Buchans metal mine in the center of Newfoundland, barite is lead-zinc-copper-sulfiding