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一、雅庫特金刚石区总的地質情况 1.在雅庫特原生金刚石矿床发现以前,世界上主要的金刚石資源的来源是南菲。1940年全世界金刚石产量是1,400万克拉,第二次世界大战时年产量略有下减,約1,100万克拉。1945年全世界产量增加到2,040万克拉。1956年全世界产量为2,160万克拉,可是大部分的产品都被帝國主义國家,尤其是美國,所壟断。在1941年到1944年間苏联在烏拉尔西坡也从事金剛石的开采(砂矿),但产量很小。1948年在西伯
I. GENERAL GEOLOGICAL CONDITIONS IN YACHUT DIAMOND DISTRICT 1. Before the discovery of the Yakut primary diamond deposit, the source of the world’s major diamond resources was Nan Philippines. Diamond production in the world was 14 million carats in 1940, slightly decreasing annual production to about 11 million carats during the Second World War. In 1945, the world’s production increased to 20.4 million carats. In 1956 the world produced 21.6 million carats, but most of the products were monopolized by the imperialist countries, especially the United States. Between 1941 and 1944 the Soviet Union also engaged in diamond mining (sands) on the western slope of the Urals, but the output was small. In 1948 in Heber