名 称：冶镁白云岩矿石  

矿石成分：矿石成分主要为白云石，镁含量20%，含少量方解石、粘土矿物。白云岩外观与石灰岩相似，但风化面上常见刀砍纹，是与石灰岩区别的主要特征。

成 因：海相沉积

层 位：中元古代增隆昌组

主要用途：提炼金属镁，冶金熔剂及耐火材料，医药化工方面用于生产泻利盐，制作饲料添加剂。

采集地点：内蒙古固阳县阿塔山

Name：Magnesiodolomite Ore

Composition：Mostly composed of dolomite, containing 20% magnesium. With minor calcite and clay minerals. Dolomite looks similar to limestone, but can be distinguished from the latter by that dolomite has cut marks on the surface, resulted from weathering.

Genesis：Marine sedimentation.

Stratigraphy：Zenglongchang Formation, Mesoproterozoic.

Usage：For extracting magnesium, metallurgy solvents and refractory materials. Also used in medicine chemical industry or making salt diarrhea and additives to feed.

Sample site：Atashan, Guyang, Inner Mongolia.