Distribution of Heavy Mineral and Its Implication to Paleogeography Environment of Palaeogene in the Eastern Sag of hemas-microsoft-com:office:smarttags" />Liaohe Basinhemas-microsoft-com:office:office" />

• 责任者：Han Zuozhen (College of Geological Science and Engineering ; Shandong University of Science and Technology ; Qingdao 266510 ; China) ; Gao Lihua
• 刊名：Journal of Mineralogy and Petrology
• 出版年：2010
• 卷期：30(3)
• 关键词：重矿物 ; heavy minerals ; 古近纪 ; Paleogene Period ; 辽河坳陷 ; Liaohe Depression
• 页码：p.59-68
• 图表：6 illus., 1 table, 20 refs.
• 分类号：1200
• issnNo：ISSN1001-6872
• isbnNo：CN51-1143/TD

According to the components and stability of the clastic heavy minerals, the tectonic evolution of the studied area can be classified into two stages: the stable heavy mineral period and unstable-stable heavy mineral period. Firstly, the period of the steady heavy mineral corresponds to the Eocene (Es₃),  during which the assemblage of stable heavy minerals is dominate,  and the average of stability coefficient,  ZTR factor,  zircon and titania is 80.54%, 45.88%, 44.1% and 14.79% respectively. Secondly, the period of the unstable-stable heavy mineral corresponds to the Oligocene (Es2 to Ed), during which the assemblage of unstable-stable heavy minerals are domination, and the average content of the epidote,  pyroxene+ amphibole,  and garnet is 20.39%, 3.87% and 19. 48%, respectively. According to analysis of hematite and limonite from the sandstone, it is considered that the weather of the depositional stage is dry in hemas-microsoft-com:office:smarttags" />Upper Es₃, Es₂ and Ed₂ with higher content of heavy minerals, and moist in Lowe Es₃, Es₁, Ed₃ and Ed₁ with lower content of heavy minerals. hemas-microsoft-com:office:office" />