Abstract:he kaolin ores occurring extensively in northern Guizhou are connected with Xuyong type kaolin ores of southern Sichuan in geographical distribution, with very similar geological characteristics. These ore deposits can therefore be studied and discussed as a whole. While describing the characteristics of the kaolin deposits at the bottom of Upper Permian in northern Guizhou, this paper presents an opinion different from the theories established by previous researchers for the origin of Xuyong type kaolin ore deposits. The previous researchers thought that Xuyong type of kaolin has been the product of Early Permian fossil weathering crust and that the materials came from the limestone of upper Maokou Formation of lower Permian. They also named such type of deposits. Nevertheless, based on the facts that the kaolin deposits are identical with the overlying pyrite-bearing clay rocks in distribution, that quite a lot of lump and massive ores occur in overlying kaolin-clay rocks although the main orebodies are in fossil karst surface of Maokou limestone, and that these orebodies exist in near-surface part, the authors consider that, instead of being the product of Early Permian fossil weathering crust, this sort of deposits seem to be recent weathering and leaching type kaolin deposits formed through transformation of kaolin minerals deposited simiultaneously with Late Permian coal bed into glagerite minerals.
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向茂木, 甘朝勋, 马忠魏.1986.黔北及邻区上二叠统底部高岭土矿床地质特征及成因[J].矿床地质,5(1):73~78.1986.Geological Characteristics And Origin Of Kaolin Deposits At The Bottom Of Upper Permian In Northern Guizhou And Its Adjacent Areas[J].Mineral Deposits5(1):73~78
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