• 责任者：Wu Zhaojian (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Han Xiaozhong
• 刊名：Geoscience
• 出版年：2013
• 卷期：27(3)
• 关键词：砂岩 ; sandstone ; 鄂尔多斯盆地 ; Ordos Basin
• 页码：p.557-567
• 图表：8 illus., 3 tables, 43 refs.
• 分类号：0803
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

     In this paper, detailed petrological and geochemical studies were carried out on the sandstones of Middle Jurassic Zhiluo Formation from 8 drilling cores in the northeastern Ordos Basin, in order to determine their provenance and tectonic setting. The samples are coarse greywacke with moderate to high SiO₂ content and Al₂O₃/SiO₂ ratio, a high content of K₂O and a low content of Fe₂O₃, MgO and TiO₂, which implies that these sandstones are in felsic, lacking of mafic materials. The rocks are enriched in large ion lithophile elements (LILEs, such as K, Rb, Sr and Ba), and depleted in high field strength elements (HFSEs, such as Nb, Ta, Ti and P).The features indicate that the source region have affinity of subduction-related tectonic setting.