Characteristics of the Middle-Late Triassic sedimentary facies assemblages in the Songpan-Ruoergai area

被引：0
作者：
Yan Zhen [1 ]
Yu Liangjun
Li Jiliang
Bian Qiantao
Wang Zongqi
Yang Yongcheng
机构：
[1] Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China
[2] Chinese Acad Sci, State Key Lab Lithospher Evolut, Inst Geol & Geophys, Beijing 100029, Peoples R China
[3] Shaanxi Inst Geol Survey, Xianyang 712000, Peoples R China
来源：
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL | 2007年 / 17卷 / 03期
关键词：
Middle-Upper Triassic; fluvial-lake environments; tide environment; tempestite; Songpan-Ruoergai;
D O I：
暂无
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Middle-Late Triassic sedimentary rocks in the Songpan-Ruoergai area mainly consist of calcareous siltstone, muddy limestone, lithic arkose, feldspathic litharenite, mudstone, wormkalk, oolithic limestone, and conglomerate. Except for limestone bed increasing eastward longitudinally and vertically, the calcareous component of the sandstones increases obviously. Abundant benthic and plant fossils and their clasts occur within these rocks. The sedimentary structures predominately contain flaser, parallel, tabular, wavy, and herringbone cross beddings. These data coevally imply that the Middle-Late Triassic sediments deposited in the fluvial, lake and tide environments. Additionally, the rocks display graded, parallel, hummocky beddings, and sandy lamination, a feature characteristic of storm deposits.
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页码：305 / 313
页数：9
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