宣龙式铁矿是我国北方最重要的沉积型铁矿床。华北克拉通长城系串岭沟组底部砂页岩是宣龙式铁矿床的赋存层位,对该地层的年代学研......

The authors studied the biomarkers (alkanes) of eight iron ore samples from Nianpanshan and Dsbaodui of Pangjiabao and L......