宁夏中宁县瀛龙山水泥灰岩矿床地质特征及成因分析

Geological characteristics and genetic analysis of the Yinglongshan cement limestone deposit in Zhong Ning County,Ningxia

宁夏石灰岩矿资源丰富,以水泥用和电石用为主。中宁县瀛龙山水泥灰岩矿床为区内大型水泥用石灰岩矿。矿床为海相化学沉积型,含矿地层为奥陶系天景山组,分为三个矿层,矿石自然类型分为中厚层状灰岩及含燧石结核(条带)灰岩两种。矿石有益组分含量较高,有害组分含量较低,质量满足工业要求。根据矿石特征分析,该矿床石灰岩矿石是在气温较高、水动力较弱、压力相对低的浅海地区沉积而成。

Limestone resources in Ningxia are rich in resources,mainly for cement and calcium carbide.The Yinglongshan cement limestone deposit is a large limestone mine in the area.The type of the deposit is marine chemical sedimentary,and the ore-bearing stratum is Tianjingshan formation of Ordovician,which is divided into three ore beds.The natural ore types are divided into medium-thick layered limestone and chert-bearing nodule(banded)limestone.The contents of the useful components of ores are high,the content of harmful components is low,and the quality meets the industrial requirements.According to the analysis of ore characteristics,the limestone ore of this deposit was deposited in shallow sea area with high temperature,weak hydrodynamic force and relatively low pressure.