在湘赣边境的茶陵、攸县、永新、莲花、萍乡等地的泥盆纪沉积铁矿属宁乡式铁矿,产在上泥盆纪佘田桥系地层中。主要铁矿层有1—2层,中夹以绿泥石页岩,或绿泥石细砂岩,厚0.3～2米。铁矿层共厚0.6～5米,个别为5或8米,为鲕状磁铁赤铁矿石,其成分一般为T.Fe 40—50％,Si O_2 5—15％,S 0.1—1.8％,P 0.3％左右。矿层多来回褶皱,属浅海相胶体沉积,有受变质的现象,有时变质现象甚为显著。 The Devonian sedimentary iron deposits in Chaling, Youxian, Yongxin, Lianhua, Pingxiang and other places on the Hunan-Jiangxi border belong to the Ningxiang-type iron ore and are produced in the Upper Devonian Shetianqiao system strata. The main iron ore layer has 1-2 layers, in the folder to chlorite shale, or chlorite fine sandstone, thickness 0.3 to 2 meters. The total iron thickness of 0.6 to 5 meters, respectively, 5 or 8 meters for the oolitic magnetite, its composition is generally T.Fe 40-50%, Si O 2 5-15%, S 0.1-1.8% , P 0.3% or so. Multi-fold back and forth, is a shallow marine colloidal deposition, metamorphic phenomenon, and sometimes metamorphism is very significant.