The deposits formed on the sea floor as sedimentary exhalative deposits (including volcanic exhalative sedimentation).The sediments arc composed of siderite, clastic carbonates and volcanic rocks.

• 矿床属海底喷流（含火山喷流）沈积成因，为菱铁矿和细碎屑岩-碳酸盐岩夹少量火山岩的沈积建造。