Kapeng syderolite deposit is large,occurred in purple clayey ferruginous mudstone and grey-green clayey shale of Lower Silurian series.

卡棚大型紫砂陶土矿主要赋存于志留系下统紫土质含铁泥岩和灰绿土质页岩中,分上下2个含矿岩系,4个矿层。