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Production is planned basically in line with the distribution of Mn resources in China. Before the 1970s, the State invested in the construction of a number of large-scale manganese mines (the Xiangtan Manganese Mine, ‘8.1’ Manganese Mine, Mugui Manganese Mine, Zunyi Mine and Wafangzi Manganese Mine) and a batch of local small and medium State-owned […]

In 1997, the output of crude ores was 5.976 million tons and that of processed ores 3.694 million tons, among which 91,000 tons were produced by key enterprises, amounting to 2.46% of the total output; 1.126 million tons by local enterprises and 2.448 million tons by township collective-owned and self-employed enterprises. On the whole, the […]

China’s diamond deposits are mainly of medium and small sizes. The largest Wangcun diamond deposit at Mengyin, Shandong, has retained diamond reserves of only 65.79 kg, which cannot compared with large deposits in other countries. China’s retained diamond (mineral) reserves account for only 0.1% of the world’s diamond reserve base, and the per-capita diamond reserves […]

Diamond deposits of China may be classified into magmatic-type (i.e. kimberlite-type), primary diamond deposits and placer diamond deposits. The retained reserves of the former make up over 95% of the total, while those of the latter only nearly 5%. According to the morphologies of orebodies, i.e. diamond-bearing kimberlite bodies, primary diamond deposits may be divided […]

Low grade of ore The average ore grade of placer diamond deposits of China ranges from 4 to 8 mg/m3, and only the ore of the Toudaogou placer deposit at Wafangdian City, Liaoning Province, reaches an average grade 14.6 to 16.5 mg/m3. The ore grade of primary diamond deposits is higher in occurrences of Shandong […]