辽西南营子熔剂用高镁石灰岩矿床地质特征及成因分析  

Geological Characteristics and Genesis of High Magnesium Limestone in Nanyingzi of Western Liaoning

作　　者：田彦凯 朱兴葛 张利晨 TIAN Yan-kai;ZHU Xing-ge;ZHANG Li-chen(Liaoning Branch of China National Geological Exploration Center of Building Materials Industry,Shenyang 110004,China)

机构地区：[1]中国建筑材料工业地质勘查中心辽宁总队,沈阳辽宁110004

出　　处：《中国非金属矿工业导刊》2023年第4期29-32,共4页China Non-Metallic Minerals industry

基　　金：中国建筑材料工业地质勘查中心地质找矿项目任务书(编号:建地矿[2021]21号)。

摘　　要：南营子向斜地处辽宁西部朝阳中生代叠加盆—岭系建平隆起的西南端,为一轴向北东—南西向的宽缓褶皱,地层岩性以古生界浅海相碳酸盐岩夹陆源碎屑岩为特征。熔剂用高镁石灰岩矿赋存于寒武系张夏组地层中,呈层状产出,主要矿物成分为亮晶方解石、泥晶方解石,矿床的平均品位CaO 48.79%、MgO 4.23%、SiO_(2)1.31%、P 0.019%、S 0.02%,具高镁低硅特点。矿床成因类型为高能潮坪滩坝相及低能浅海台地相交互沉积矿床。Nanyingzi syncline is located at the Southwest of Jianping rise in Chaoyang Mesozoic Superimposed basin-ridge system.It is NE-SW trending wide-flat folds.Stratum rock character is Paleozoic shallow marine carbonate mixed with terrigenous clasolite.The high magnesium limestone ore used for flux exists in the Cambrian Zhangxia Formation strata,The orebodies are hosted by stratiform,The main mineral composition is sparry calcite and micrite calcite,Average of mineral deposits:CaO 48.79%,MgO 4.23%,SiO21.31%,P 0.019%,S 0.02%.It is high magnesium and low silicon.The genetic type of the deposit is intersecting sedimentary deposit between high-energy tidal beach and low energy shallow sea platform.

关 键 词：辽西 南营子向斜 高镁石灰岩 矿床地质特征 

分 类 号：P619.225[天文地球—矿床学]