福建大田狮古洞矿区黑色冶金用熔剂灰岩矿地质特征及成因探讨

Geological Characteristics and Genesis of Shigudong Black Metallurgical Flux Limestone Deposit in Datian County,Fujian Province

大田狮古洞黑色冶金用熔剂灰岩矿贮存于早二叠世船山组和中二叠世栖霞组中,矿体层控特征明显,厚度较大、岩性较均一,矿石品质较佳。通过对区内石灰岩矿体产出的地质背景、控矿构造、矿体特征、矿石质量开展综合研究,在船山组中建立了豹纹状-大扁豆状灰岩组合、白云质灰岩、小扁豆状灰岩3个标志层。对区内矿床成因进行探索,对推覆断层较发育的大田一带寻找石灰岩矿床有一定的指导意义。

The black metallurgical flux limestone black metallurgical flux limestone deposit in Datian county was stored in the early Permian Chuanshan formation and the Middle Permian Qixia formation.The orebody is obvious to the strata control characteristics,larger thickness,more homogeneous lithology and better ore quality.Based on a comprehensive study of the geological background,ore-controlling structure,orebody characteristics and ore quality of limestone orebodies in the area,three marker layers of leopard striate lentil limestone assemblage,dolomitic limestone and lentil limestone have been established in the Chuanshan formation.The exploration of the genesis of the ore deposits in the area is of certain guiding significance to the exploration of limestone deposits in the area of Datian,where the nappe faults are relatively developed.