安宁县街磷矿床中低品位矿石地质特征及产出状态

安宁市县街磷矿床属古生代下寒武统梅树村组大型浅海相层状磷块岩矿床。磷矿层有上、下两层,分别产于梅树村组中谊村段的1m1-3和1m1-1两个层位。中低品位磷矿石产于下矿层,主要由磷酸盐矿物和脉石矿物两部分组成,含较多碎屑成分,矿石品位10%～20%。磷酸盐矿物以胶磷矿为主,主要呈球粒或集合体球粒产出,以及在基质中呈胶结物。矿石类型主要为白云质球粒磷块岩、碎屑状砂屑磷块岩。矿石结构、构造主要为内碎屑结构、条带状构造。矿层相对稳定,但P2O5含量与矿石结构构造关系密切,品位变化明显。

Geological Features and Output State of Low-grade Phosphate Ore Bed in Anning County Street

Phosphorite bed in Anning county Street belongs to large deposits of phosphate rock of the lower cambrian shallow marine layer of a paleozoic plum tree system.Phosphate layers has two layers and locate in the layers of 1m1-3 and t 1m1-1 respectively in friendship village of plum tree system.The low-grade phosphate rock produced in the next ledge,mainly composes of phosphate minerals and gangue minerals,with more debris composition,with ore grades 10 to 20%.Phosphate mineral is mainly phosphate rock,primarily output in a collection of chondrules or chondrule,and the cement matrix.The main types of ore are dolomite ore pellets,clastic calcarenite phosphate rock.The structure and construction of ore are mainly debris structures and banded structure.Seam is relatively stable,but the content of P2O5 is closely related to the mineral structure,the grade changes significantly.