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”内的红牛铜矿,赋存于大理边部矽卡带角。

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石外，矽卡尚有其他矿物如符山石，阳起石，绿帘石，萤石钙铁榴石。