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一、地质地球物理前提川南某硫铁矿系硫煤共生型的中低品位大型矿床。它赋存于上二叠统龙潭组底部,下二叠统茅口组灰岩的古侵蚀面上。矿区构造简单,以开阔褶皱为主。矿体呈层状产出,产状平缓。矿石物质成分简单,矿石矿物以黄铁矿为主,白铁矿少许;脉石矿物为高岭石及水云母。硫铁矿呈似层状、扁豆状、结核状、星散状与粘土岩构成矿层。厚度及品位变化较为稳定。含矿层与其顶底板物性差异显著:矿层上部或直接顶板为无烟煤层,物性特征为高阻、低密度、低放射性;底板为茅口灰岩,显极高阻、中高密度、极低放射性;而含矿
First, the geological and geophysical premises of a pyritic sulfur in southern Sichuan co-symbiotic type of low-grade large-scale deposits. It occurs at the bottom of the Upper Permian Longtan Formation and on the ancient erosion surface of the Lower Permian Maokou Formation limestone. Mining area structure is simple, mainly to open folds. Ore body is layered output, smooth shape. Ore composition is simple, mainly pyrite pyrite, a little iron ore; gangue minerals kaolinite and water mica. Pyrite is layered, lenticular, tubercular, scattered star and clay rock layer. Thickness and grade changes more stable. There are significant differences between the ore-bearing layers and the top and bottom plates: the upper part of the ore seam or the direct roof is an anthracite layer, and the physical properties are high resistance, low density and low radioactivity; the bottom plate is Maokou limestone with extremely high resistance, medium to high density and very low radioactivity; Containing ore