摘要
南秦岭下古生界地层中赋存着丰富的石煤资源，特别是下寒武统的鲁家坪组和下志留统的大贵坪组的石煤最为丰富，是本区下古生界的主要含煤段。这两个组的石煤均富含硒元素。下寒武统的石煤一般含硒量为（２０～５０）×１０￣（－６），最高可达３７０×１０￣（－６），下志留统的石煤含硒量一般为（２０～３０）×１０￣（－６），远远高于地壳克拉克值￣［１］。
The Lower Paleozoic strata in South Qinling mountain are rich in stonecoal.The stone coal itself enriehes selenium.Particularly,the Lower Cambrian andLower Silurian strata is not only rich in.stone coal but also rich in selenium. Theselenium content of Lower Cambrian coal is about (20～50) × 10￣(-6)and that of the LowerSilurian coal is about(20～30)× 10￣(-6). The value is much higher than that of the contentof the crust.
关键词
下古生代
石煤
含硒量
煤矿床
Lower Paleozoic era,stone coal,seleninum content
