The Discovery of the Micropellets from the Triassic Leikoupo Formation-Xujiahe Formation Boundary in Northeastern Sichuan Province

详细信息   

• 责任者：Liu Yanting (Southern Branch ; SINOPEC ; Chengdu 610041 ; China) ; Fu Heng
• 刊名：Sedimentary Geology and Tethyan Geology
• 出版年：2012
• 卷期：32(2)
• 关键词：三叠纪 ; Triassic ; 地层界线 ; stratigraphic boundary ; 四川 ; Sichuan Province
• 页码：p.49-51
• 图表：2 illus., 1 table, 15 refs.
• 分类号：1200
• issnNo：ISSN1009-3850
• isbnNo：CN51-1593/P

摘要

    

The micropellets are recognized for the first time from the Triassic Leikoupo Formation-Xujiahe Formation boundary in northeastern Sichuan Basin. These micropellets occur as single solid rounded pellets with the diameters from 3 to 4 μm, and compositionally they display the siliceous pellets in which the corrosion structures and textures are visible. It is probable that the meteorite-impact events once took place around the Triassic Leikoupo Formation-Xujiahe Formation boundary in northeastern Sichuan Basin. The discovery of the micropellets in the study area may inspire some new approaches to fathom the terrestrial-marine transition and biotic succession during the Triassic in  Sichuan Basin.