Discovery walks on primary deposits of diamond
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 into the pipe type, dike type and sill type.
More than 20 kimberlite pipes have been found in China, mainly distributed in Shandong and Liaoning. The section of the pipes is generally round, elliptical and irregular in shape and a few to a few hundred meters in diameter with a ratio of long diameter to short diameter of about 2¡Ã1 to 4¡Ã1. They show a pinch-and-swell structure in section and become dikes to a certain depth. The pipes generally dip very steeply at dip angles of 75¡ãto 85¡ã. They have a high diamond potential. Most primary diamond deposits in China belong to this type.Henan Hongxing Mining Machinery Co., Ltd is the professional manufacturer of complete sets of mining machinery, for example,flotation cells,mobile crusher Welcome all of you to visit our official website.artificial sand maker:http://www.hxjqchina.com/product-list_57.html
Over 400 kimberlite dikes have been discovered in China, occurring in Liaoning, Shandong and Guizhou. Part of them contain diamond, but few of them are of industrial value. Up to now it is known that only the Hongqi Nos. 1 and 5 kimberlite dike primary diamond deposits at Mengyin, Shandong, have industrial value.Kimberlite sills are present in Shandong and Henan. They are intruded gently (generally at a dip angle of 10¡ã) along the bedding of the country rocks. The sills have a low ore potential and seldom form industrial deposits.
According to the formation ages, diamond deposits may be divided into ancient placer deposits and modern (Quaternary) placer deposits. Placer diamond deposits of industrial va-lue in China are all modern (Quaternary) placer deposits, distributed in Shandong, Hunan, Liaoning and Jiangsu. They include eluvial, hillside, deluvial and elluvial placer deposits.
Processing your request, Please wait....
