四川雷波县小沟磷矿床地质特征及成因  

Geological Features and Prospecting Potential of the Xiaogou Phosphorite Deposit in Leibo, Sichuan

作　　者：赵伟 陈敏 唐茂林 游学军 

机构地区：[1]四川省地质矿产勘查局二〇七地质队,四川乐山614000

出　　处：《四川地质学报》2015年第3期399-403,共5页Acta Geologica Sichuan

基　　金：四川省地勘基金"四川省雷波县小沟磷矿详查"项目资助的成果

摘　　要：四川省雷波县小沟磷矿位于康滇地轴东缘川滇成磷带北段,是雷波县十二大磷矿区之一。矿床赋存于寒武系下统麦地坪组第二段,呈层状展布于司机坪背斜两翼,矿层具有双层结构,矿石矿物为泥晶磷灰石、细晶磷灰石、纤维集晶磷灰石;脉石矿物主要为玉髓、石英、白云石和方解石;矿石自然类型为块状砂屑凝胶磷块岩,条纹条带状粉晶砂屑凝胶磷块岩和孔状砂屑磷块岩。矿床属浅海潮下浅滩相碳酸盐岩磷块岩矿床。The the Xiaogou phosphorite deposit in Leibo, Sichuan lies in the north of Sichuan-Yunnan phosphorite belt on the eastern margin of the Kangdian Axis. The deposit is conf＇med to the 2nd Member of the Lower Cambrian Maidiping Formation and occurs as stratified form in two limbs of the Sijiping anticline. Ore minerals are apatite micrite, aplitie apatite and fibrous apatite, gangue minerals are chalcedony, quartz, dolomite and calcite. Natural type of ore are massive psammitic grlinite phsphorite, ribbon crystal powder grlinite phsphorite and porous psammitic phsphorite. The deposit was deposited in sublittoral shoal environment.

关 键 词：磷矿 地质特征 麦地坪组 雷波县小沟 

分 类 号：P619.213[天文地球—矿床学]