矿区地质地球物理概况1.地质概况矿区位于江汉盆地北部边缘地带,其构造特征从总体看是一个呈NNW向的西陡东缓的断陷盆地,盆地的基底定型于侏罗纪末期,是一套震旦系至侏罗系的海相,海陆交互相地层.主要岩性有大理岩、灰岩、砂岩、页岩.上覆盖层是一套白垩系、第三系和第四系的湖相、河湖相地层,自上而下可分为第四系(Q)、第三系掇刀石组(Nd)、第三系分水岭组(Ef)、白垩系跑马岗组(K_2p)、白垩系红花套组(K_2h)及白垩系罗镜滩组(K_2J). Geological and geophysical survey of the mining area 1.Geological overview The mining area is located in the northern margin of the Jianghan Basin. Its structural features are generally a faulted basin with west-westerly steep and gentle easterlies in the NNW direction. The basement of the basin was finalized at the end of Jurassic, Set from the Sinian to Jurassic marine, marine and intercontinental phase strata, the main lithology marble, limestone, sandstone, shale, the upper cover is a set of Cretaceous, Tertiary and Quaternary lakes Facies and lacustrine facies strata can be divided into Quaternary (Q), Tertiary tidal group (Nd), Tertiary watershed (Ef), Cretaceous Komap Formation (K_2p) from top to bottom, Cretaceous safflower sets (K_2h) and Cretaceous Luojintan Formation (K_2J).