云南省丘北县舍龙磷矿地质特征及矿床成因  

THE GEOLOGICAL FEATURE AND GENESIS OF SHELONG P DEPOSIT IN QIUBEI,YUNNAN

作　　者：范礼刚 王朝勇 尹焕菊 FAN Li-gang;WANG Chao-yong;YIN Huan-ju(Geoexploration Institute,China Metallurgical Geological General Bureau,Kunming 650203;Yunnan Geoexploration General Company,Kunming 650051)

机构地区：[1]中国冶金地质总局昆明地质勘查院,云南昆明650203 [2]云南省地质工程勘察总公司,云南昆明650051

出　　处：《云南地质》2018年第4期489-494,共6页Yunnan Geology

摘　　要：云南丘北县舍龙矿区位于滇东南褶皱带、丘北-广南褶皱束内,磷矿体呈面状分布于中三叠统个旧组第四段(T_2g^d)之含磷白云岩、含磷硅质岩,暴露地表面后第四系风化残积层中,矿层隋基岩风化面起伏呈舒缓波状展布,矿体形态主要受岩溶地貌及溶坑的影响和限制。经岩石地球化学测量,该区中三叠统个旧组第四段(T_2g^d)白云岩中P含量较高,无疑为该磷矿的形成提供了物质来源。该矿床属次生—风化淋漓残积富集型磷矿床。Shelong orefield of Qiubei is in Qiubei-Guangnan fold bundle of the SE Yunnan fold belt.The P orebody is in planar distribution in Middle Triassic Gejiu Formation Member 4（T 2g d）P-bearing dolomitite,P-bearing silicic rock.After outcropping on the surface,in the Quarternary weathering sedentary the ore bed is in wavy distribution because of the rise and fall of weathering surface of basement rock .The form of orebody is influenced and controlled mainly by the karst landfprm and hollow.According to the geochemical survey,Middle Triassic Gejiu Formation Member 4（T 2 g d）dolomitite is with high P,which certainly is the source of P deposit.It is a secondary-weathering leaching sedentary concentration P deposit.

关 键 词：风化残积层控矿 次生富集型矿床 云南丘北县 舍龙 

分 类 号：P619.213[天文地球—矿床学]