中文摘要：

豫西中元古界兵马沟组作为古-中元古代熊耳群形成后发育的第一层碎屑沉积,对揭示熊耳群发育背景及华北克拉通南缘古-中元古代构造演化过程有重要意义。在对豫西伊川兵马沟组典型剖面详细描述和采样的基础上,运用沉积学、沉积地球化学方法,探讨了其沉积环境、物源与构造控制因素。结果表明,兵马沟组中上段砂岩沉积古环境为还原环境,物源以火山活动区为主,兼有少量稳定陆壳物质且形成于活动大陆边缘的大陆岛弧背景。综合以上分析认为,兵马沟组形成时期为活动大陆边缘,中元古界熊耳群形成于俯冲带。

英文摘要：

Mesoproterozoic Bingmagou Formation in western Henan Province is the firstly formed clastic strata after the formation of Paleoproterozoic Xiong＇er group,and has a great tectonic significance of the southern North China Craton. A analysis is given about the rare earth element（ REE） geochemical characteristics of sandstone samples collected from the typical Mesoproterozoic Bingmagou Formation profile in Yichuan area.The analysis results show that the paleoenvironment of Mesoproterozoic Bingmagou formation mainly reduces;the provenance of the sandstones mainly come from volcanic activity area with little provenance from stable crust; the tectonic setting of Mesoproterozoic Bingmagou Formation is continental island arc basin in an active continental margin. Combining the results of provenance and tectonic setting analysis,it is concluded that the tectonic setting of southern North China Craton is active continental margin in Paleaoproterozoic-Mesoproterozoic era,and the Xiong＇er group is formed in a subduction zone.