摘要
风暴沉积是 2 0世纪 70年代后期才指提出的一个重要概念 ,被认为是沉积学理论的一次重大突破。但是以往的研究多集中在对浅海陆棚区风暴沉积的研究 ,而对近岸地带潮坪风暴沉积的研究则比较薄弱。系统总结了近 2 0年来国内外对现代潮坪风暴沉积研究的成果 ,同时介绍了在古代地层中首次识别出的潮坪风暴岩沉积特征 。
Storm deposit(tempesite) constitute an important conception which was not put forward until the late 1970s, and it was considered as an great discovery in sedimentology. The research work in the past, however, was mostly focused on the storm deposits in the shallow sea shelf(between the fair weather wave base and the storm wave base), the reports of the storm deposits on the seashore easpecially on tidal flat are rarely seen. The present paper systematically introduces the reseach accomplishments of modern storm deposits in tidal flat environment, meanwhile introduces the tidal flat tempesite identified in the ancient rock record. The tidal flat storm deposit is composed of dolostone accumulation bodies, whose bottom has pocket mold and channel mold structures and whose top is convex upward in cloud like form. The psephitic clasts are arranged mainly in radiating pattern and appear macroscopically in bird foot or in v shape pattern. Finally the paper points out the significance of studying tidal flat storm deposits.
出处
《地球科学进展》
CAS
CSCD
2002年第3期391-395,共5页
Advances in Earth Science
基金
国家自然科学基金项目"下古生界深水牵引流沉积研究"(编号 :49872 0 5 0 )资助
