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(一)概况 宜昌磷矿桃坪河矿区位于黄陵背斜东北翼,矿区出露地层有前震旦系崆岭群混合花岗岩,震旦系上统陡山沱组含磷岩系和灯影组白云岩。区内为一倾向东的单斜构造,地层倾角8～15°,构造以断裂为主,局部地段有较缓的褶皱起伏;地形陡峻,悬岩峭壁到处可见,坡角一般为35～55°。矿区主要水系南为神农河,中为桃坪河,北为升晒旗河。河谷呈“V”形,坡降较大。除桐木岗地段外,地下水流向自西向东,与地表径流水相同。
(I) Overview Yichang Phosphorus Mine The Pingping Mine is located in the northeast wing of the Huangling anticline. The exposed strata of the former Sinian Mulingling Group mixed granite, the Sinian Ertan Doushantuo phosphorus-bearing rock series and the Deng Ying Group Baiyun rock. The area is a monoclinic structure with a dip eastward. The dip angle of the strata is 8-15 °. The structure is mainly fault-fractured with gentle folds undulating in some areas. The steep terrain is steep with hanging rock cliffs and the slope angle is generally 35-55 ° . The main mining area south of the Shen Nong River, peach River in the North for the sun flag River. Valley was “V” shape, slope larger. In addition to Tongmu Gang lot, the groundwater flow from west to east, the same with surface runoff.