现代地质2017，Vol.31Issue(6)：1233-1240,8.
鄂尔多斯盆地徐庄组碳酸盐岩风暴沉积发育特征及其地质意义
Characteristics and Geological Significances of Xuzhuang Formation Carbonate Tempestites in Ordos Basin
摘要
Abstract
The tempestites which developed in the Cambrian Xuzhuang Formation in Ordos Basin mainly ineludes many sedimentary structures,such as erosional base,storm flow-generated gravelstones,hummocky and swaley cross-stratification.Sedimentary structure in different conditions can form different storm sedimentary sequences.The ideal storm sedimentary sequence includes five units,from bottom to top,which are composed of A-erosional base and conglomerates representing the deposition of storm peaks and decay period,B-graded bedding with grain-size decreasing upward when storm weakened,C-parallel lamination,D-hummocky cross-stratification representing fluid property changes from density flow to tractive current in storm attenuation period,E-mudstone with horizontal bedding and micrite limestone forming in storm rest period.Based on outcrop observation in the field,there are five types of depositional sequence.Different types of depositional sequence have different sedimentary characteristics and different sedimentary environments.The carbonate tempestites in Cambrian Xuzhuang Formation have important significances in evolution of palaeoblocks and restoration of ancient latitudes,and in research of Ordos Basin palaeogeography.关键词
鄂尔多斯盆地/徐庄组/风暴岩/风暴沉积/风暴序列Key words
Ordos Basin/Xuzhuang Formation/storm deposit/tempestite/storm sedimentary sequence分类
能源科技引用本文复制引用
白一鸣,张元福,胡晨林,王振..鄂尔多斯盆地徐庄组碳酸盐岩风暴沉积发育特征及其地质意义[J].现代地质,2017,31(6):1233-1240,8.基金项目
国家自然科学基金项目(41572092) （41572092）
页岩气资源评价与战略选区国土资源部重点实验室资助. （）
