1. College of Earth Sciences, Jilin University, Changchun 130061, China;
2. Heilongjiang Jianlong Steel Co. Ltd., Shuangyashan 155126, Heilongjiang, China;
3. No.11 Geological Brigade of Hebei Geology and Mineral Exploration Bureau, Xingtai 054000, Hebei, China

Yangbishan iron deposit in Heilongjiang is located in the middle of Jiamusi Massif. The iron formation belongs mainly to the first segment of Dapandao Formation of Xingdong Group. The iron formation is composed of garnet-mica-quartz schist, sillimanite-biotite-quartz schist and gneiss, indicating that it can be classified as the khondalite series. The protolith of khondalite series reflect its neritic shelf sedimentary setting. The magnetite is the main metal mineral in ore, of which a minor amount was replaced by late pyrite. Quartz and sillimanite are the main nonmetallic minerals and both are in orientational arrangement. The iron ores in the Yangbishan deposit is predominantly banded, with minor massive. According to ore-forming geological condition and deposit characteristics, the Yangbishan ore deposit can be defined as Superior-type BIF. LA-ICP-MS U-Pb dating has been carried for detrital zircon grains from the ore-hosting sillimanite-biotite-quartz schist. The dating results can be listed as four groups, 1 006~1 212 Ma, 1 238~1 480 Ma, 1 521~1 742 Ma and > 1 800 Ma, respectively. The age of 1 006~1 212 Ma, the minimum age group, determines the sedimentary age of iron formation in Yangbishan iron deposit. The major age group (1 238~1 480 Ma) reflects the main rocks in erosion area are Mesoproterozoic magmatic rocks. While the two oldest zircons (2 672 Ma, 2 711 Ma) hold the conclusion that there developed the Archean crystalline basement in Jiamusi Massif. Combined with the previous research results of Mashan Group, it is concluded that the Xiongdong Group is the underlying strata of the Mashan Group in Jiamusi area.