• 责任者：Xiao Yi (China University of Geosciences ; Wuhan 430074 ; China) ; Zhou Hanwen
• 刊名：Acta Sedimentologica Sinica
• 出版年：2011
• 卷期：29(6)
• 关键词：硅质岩 ; silicolite ; 岩石地球化学 ; lithogeochemistry ; 沉积环境 ; sedimentary environment ; 河北 ; Hebei Province
• 页码：p.1145-1155
• 图表：6 illus., 2 tables, 41 refs.
• 分类号：0803
• issnNo：ISSN1000-0550
• isbnNo：CN62-1038/P

The Qinhuangdao area is located in the northeastern margin of the North China Block. The Liangjiashan and Majiagou formations in this area are mainly composed of fine-grained dolomitic limestone, fine-grained dolomite, leopard-like limestone and calcirudite. XRD analyses show that the major minerals of the silicalite are quartz, calcite and some dolomite. The silicalite samples are worm-like, spherical and needle-like chalcedony aggregates with metasomatic structure in some of them under the microscope. The silicalites are poor in Mn and Fe, with Si /(Si + Al + Fe) ratios of 0.98~0.99, low ∑REE, and very weak negative Ce anomalies in the NASC-normalized flat REE patterns.