旋回地层学研究现状和新进展  

A REVIEW ON THE RESEARCH STATUS AND NEW ADVANCE OF CYCLOSTRATIGRAPHY

作　　者：陈留勤[1] 段凯波[1] 霍荣[1] 

机构地区：[1]中国地质大学地球科学与资源学院,北京100083

出　　处：《新疆地质》2009年第3期254-258,共5页Xinjiang Geology

基　　金：国家自然科学基金项目(40472065)资助

摘　　要：旋回地层学作为一门独立的地层分支学科诞生于20世纪80年代,它以米兰科维奇天文轨道旋回为理论基础,以露头剖面、岩心等为研究对象,应用地球化学、光谱分析和时间序列分析等方法,研究天文轨道参数周期性变化在地层记录中的沉积响应.旋回地层学的基本地层单位米级旋回,相当于层序地层概念体系中的准层序,二者相互联系又存在差异."天文地质年代表"的提出和"国际地质年表"把天文轨道因素作为确定地质年代的一种重要方法,突出显示旋回地层学在定量确定地质年代方面的优势.近年来在地层记录中识别出时间分辨率更高的亚米兰科维奇旋回信号不仅是该学科最新进展,也是沉积学和地层学新的生长点.Cyclostratigraphy was born in 1980s as a subdiscipline of stratigraphy. Based on the Milankovitch theory, outcrop sections and cores are analyzed with methods such as geochemistry, spectrum analysis,and time-sequence analysis to study the complex responses of orbital forcing to sedimentary records. Meter-scale cycle has being used as the basic stratigraphic unit of cyclostratigraphy, which has similarities and differences with parasequence of sequence stratigraphy. Recently, the fact that Astronomical Time Scale was proposed and the astronomical orbital elements were used as an important method of age-dating in Geological Time Scale indicates evidently that cyclostratigraphy has the advantage of determining geological time quantitively.The recognition and application of high time-resolution sub-Milankovitch cycle signals is considered to be the latest advance of cyclostratigraphy and the growth point of sedimentology and stratigraphy.

关 键 词：旋回地层学 米级旋回 米兰科维奇理论 亚米兰科维奇旋回 

分 类 号：P539[天文地球—古生物学与地层学]