The stratiform skarn, which is associated with schist and marb le of the Tianpeng Group in the Middle Cambrian metamorphic series, is the main host rock of the Dulong tin-zinc polymetallic deposit.

• 都龙锡锌多金属矿床的主要含矿岩石层状夕卡岩，顺层产出于中寒武统田蓬组片岩、大理岩中。