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自然镍产于河北省燕山南段某地的花岗岩中。该岩体为燕山早期形成的小岩株,侵位于某背斜西端轴部前震旦系片麻岩中。岩休化学成分属铝过饱和偏碱性,含有铌、钽、锂、铍、铷、铯等稀有金属矿化。岩体可划分为两期,第一期岩性为红色细粒花岗岩,第二期为白色细粒至似斑状花岗岩。在这两期花岗岩的人工重砂中均发现有自然镍,与自然镍伴生的副矿物有磁铁矿、钛铁矿、铌铁矿、钛铁金红石、细品石、独居石、锆石、黄玉、萤石、黄铁矿、闪锌矿、方铅矿,黄铜矿等二十余种。
Natural nickel is produced in granite in a certain area south of Yanshan in Hebei Province. The rock mass is a small rock formed early in Yanshan and intruded in the former Sinian gneisses in the western anticline. Rock chemical constituents are aluminum supersaturated alkaline, containing niobium, tantalum, lithium, beryllium, rubidium, cesium and other rare metal mineralization. The rock mass can be divided into two phases, the first lithology is red fine granite, the second is white fine to speckled granite. Natural nickel is found in the artificial heavy sand of these two phases of granite. The secondary minerals associated with natural nickel include magnetite, ilmenite, niobite, ilmenite rutile, fine pebbles, monazite, zircon, Topaz, fluorite, pyrite, sphalerite, galena, chalcopyrite and other more than 20 species.