• 责任者：Li Hongzhong (Key Laboratory of Mineral Resources ; Institute of Geology and Geophysics ; CAS ; Beijing 100029 ; China) ; Zhou Yongzhang
• 刊名：Acta Petrologica Sinica
• 出版年：2012
• 卷期：28(11)
• 关键词：硅质岩 ; silicolite ; 华北平原 ; North China Plain
• 页码：p.3679-3691
• 图表：6 illus., 4 tables, 61 refs.
• 分类号：0803
• issnNo：ISSN1000-0569
• isbnNo：CN11-1922/P

Xiong‘er Group, mainly composed of weakly-basic intermediate rocks, is the production of paleoproterozoic stretchingcracking of southern region in North China platform. Through the geochemical analysis and SEM-EDS analysis of cherts sandwich in volcanic rocks, from Xiong’er Group of top Majiahe Formation, the results show that the cherts, in low degree of crystallization, SiO₂ are 65.55%，80. 33% with 73.41% as its average, are hydrothermal sedimentary genesis for their geochemical characteristics, such as the Ba, U, EREE, A1/（ A1 ＋ Fe ＋ Mn）, Fe/Ti, （ Fe ＋ Mn）/Ti, Ba/Sr values. The chert sedimentary system is controlled by the endogenic geological process, whose hydrothermal sediment system come from the heating effect of the magma. The hydrothermal system is enriched during the dissolution and leaching, and works as the primary material source to cherts.