Two obvious traits of diamond ore in our land
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 than in occurrences of Liaoning. The average ore grades of diamond occurrences at Mengyin, Shandong, are 53.57 to 672.313 mg/m3; among these occurrences the Wangcun diamond deposit has the highest average grade of ore. The average ore grades of primary diamond occurrences at Wafangdian, Liaoning, are in the range of 29.8 to 462 mg/m3, with the ore of pipe No. 68 of Toudaogou having the highest grade.
Good quality of ore
Diamond products of China are generally good in quality. Especially diamonds produced in Liaoning are of excellent quality. According to the statistics of the geological grade, gem diamonds take up only 30%, but according to the statistics of the annual production, gem diamonds may account for over 70% of the annual production. Among the diamond products of Shandong Province, gem diamonds make up about 15 to 20%. The content and granularity of gem diamonds from placer diamond deposits are notably higher than those from primary diamond deposits. Gem diamonds from placer deposits in Hunan, Liaoning and Shandong account for 60%, 50% and 30% of the total production respectively, but famous large-grained diamonds are mostly found in Shandong, and the crystals are relatively intact.Henan Hongxing Mining Machinery Co., Ltd is the professional manufacturer of complete sets of mining machinery, for example,cement plant,mobile crushers Welcome all of you to visit our official website.artificial sand maker:http://www.hxjqchina.com/product-list_57.html
II-type diamonds occupy a certain proportion in diamond deposits of China. Preliminary analysis of diamond samples from part of diamond orebodies gave the following results: the content of II-type diamonds from the Shengli No. 1 pipe in the Wangcun deposit, Mengyin County, Shandong Province, is 18.67% of the total diamond samples weight, of which the IIb type makes up 24.67% of the II type; the content of II-type diamonds from orebody Nos. 50, 51, 68 and 74 in the Toudaogou deposit, Wafangdian, Liaoning, is 3.86% of the total weight, of which the IIb type takes up 5% of the II type; the content of II-type diamonds from the Dingjiagang placer deposit, Changde, Hunan, is 2.6% of the total sample weight, all the diamonds being of IIa type.
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