The issue of age attribution of the Mesoproterozoic sedimentary strata, regional paleogeographic pattern, and tectonic evolution in the southern margin of the North China Plate has recently been the subject of vigorous debate. This study reports U- Pb geochronology and characteristics of trace elements in detrital zircons from the Yunmengshan Formation of the Ruyang Group, and the Huanglianduo Formation in the Lushan- Xiatang area of the western Henan Province. The weighted average age of the youngest batch of zircons from the Yunmengshan Formation is 1658±63 Ma which constraints the earliest sedimentary age of the Ruyang Group to no earlier than 1700 Ma. Combined with the chronological calibration of the Luoyukou Formation (1611~1638 Ma) of the upper part of the Luoyu Group, the formation age of the Ruyang and the Luoyu groups was limited to 1700~1600 Ma, which is the middle and late period of the Mesoproterozoic Changcheng period, corresponding to the international Statherian Period. The 207Pb/206Pb ages of the detrital zircons from the Yunmengshan and the Huanglianduo formations range from 1644 Ma to 3179 Ma, displaying six age peaks of 1850 Ma, 2100 Ma, 2300 Ma, 2500 Ma, 2670 Ma and 2900 Ma, corresponding to the Middle Archean- Palaeoproterozoic geological events of the North China Craton (NCC). The provenance of the Yunmengshan Formation is dominated by the 1850 Ma peak age geological body, and the Huanglianduo Formation by the 2500 Ma peak age geological body. According to the sedimentary properties and the formation background of the Yunmengshan Formation, the geochemical characteristics of the Xiong’er Group volcanic rocks and their corresponding zircons, the sedimentary characteristics of the Xiong’er Group sedimentary rocks and the basin’s tectonic attributes, would indicate that the Xiong’er Group and the overlying Ruyang Group were formed in the post- arc basin symbiotic with the “island arc”. Based on the “synsedimentary zircon” of the Yunmengshan Formation with the geochemical characteristics of the “island arc”, it is suggested that the island arc volcano was still active during the period of the Yunmengshan Formation.