The Characteristics of Storm Deposits in the Lower Huanglong Formatiom of Majiaoba Area, Northwestern Sichuan Provine

详细信息   

• 责任者：Xu Jinlong (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei ; China) ; Hong Tianqiu
• 刊名：Chinese Journal of Geology
• 出版年：2012
• 卷期：47(2)
• 关键词：风暴沉积 ; tempestite deposit ; 四川 ; Sichuan Province
• 页码：p.422-439
• 图表：8 illus., 2 plates, 39 refs.
• 分类号：0803
• issnNo：ISSN0563-5020
• isbnNo：CN11-1937/P

摘要

There are many depositional characteristics of storm deposits in the lower Huanglong Formation around Majiaoba area, Jiangyou County, including storm shell limestone, storm calcirudite, storm nodular limestone, storm calcarenite, scouring structures, graded beddings, similar knotty structures, scale beddings, horizontal beddings, current beddings, bioturbate structures and so on. Through detailed field observation and laboratory study, four storm layers have been recognized in each of the two sections and a total of five combinations of storm deposits systems have been divided.  The tempestites are wholly proximal storms rocks. The research of tempestite is useful in stratigraphic correlation, paleoclimate, lithofacies paleogeography, sedimentary evolution and oil-gas exploration.