The Hongniu Cu deposit in "Sanjiang Metallogenetic Zone" is occurred in the skarnization alteration zone in the margin of marble and the hornfels body.

“三江成矿带”牛铜矿,赋存于大理岩边部卡岩化蚀变带角岩体中。

Apart from magnetite and almandine garnet, the skarn also contains these minerals: idocrase, actinolite, epidote, fluorite and andradite (another garnet mineral).

主要构成矿物除磁铁矿和铁铝榴，卡岩尚有其他矿物如符山，阳起，绿帘，萤钙铁榴。