• 责任者：Hu Guohui (Key Laboratory of Mineralogy and Metallogeny ; Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Zhou Yanyan
• 刊名：Acta Petrologica Sinica
• 出版年：2012
• 卷期：28(11)
• 关键词：沉积岩 ; sedimentary rocks ; 河南 ; Henan Province
• 页码：p.3692-3704
• 图表：6 illus., 1 table, 57 refs.
• 分类号：0803
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

The Archean-Paleoproterozoic metamorphic crystalline basement and subsequent sedimentary cover well outcrop in the Songshan area along the southern margin of the North China Craton （NCC）. The Wufoshan Group, covering on the Dengfeng Group and Songshan Group with angular unconformity, is the earliest sedimentary stratum extensively distributed in Songshan area. All sedimentary samples show that the light rare earth elements （LREE） are enriched relative to the heavy REE with moderately negative Eu anomalies. The petrologic and geochemical signatures show that the sedimentary rocks of the Wufoshan Group sourced from post-Archean medium-acid components with minor basic rocks.  Sandstones in the middle and lower part of the Wufoshan Group formed in a passive continental margin, the same as contemporary sedimentary sequences in the southern margin of the NCC, implying that the tectonic setting shifted to a stable sedimentary stage after the eruption of Xiong’er Group volcanic rocks. However, mudstones in the upper part formed in a sedimentary basin related to a continental arc. More crustal activities and distinct changes in sedimentary environments from Mesoproterozoic to Neoproterozoic indicate the transition from passive to active continental margin, a possible effect of the early tectonic events of the Qinling Orogenic Belt.