Seismic Stratigraphy and Global Changes of Sea Level, Part 1: Overview1

Seismic Stratigraphy and Global Changes of Sea Level, Part 1: Overview1
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发表时间:
1977
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通讯作者:
P. Vail;R. Mitchum;C. Payton
P. Vail;R. Mitchum;C. Payton
中科院分区:
其他
文献类型:
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作者:
P. Vail;R. Mitchum;C. Payton

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地震地层学基本上是对地震资料进行地层解释的一种地质方法。地震反射的独特性质允许直接应用基于物理地层学的地质概念。原生地震反射是由岩石中的物理表面产生的,主要由地层(层面)表面和具有速度-密度差异的不整合面组成。因此,一次地震反射与地层面平行,不整合。尽管地层或均匀表面上方的所有岩石都比其下方的岩石年轻,但由此产生的地震剖面是年代地层(时间地层)沉积和结构模式的记录,而不是时间-海侵岩石地层学(岩石地层学)的记录。由于地震反射遵循年代地层学的相关性,因此,不仅可以解释沉积后构造变形,而且可以作出以下类型的构造变形
Seismic stratigraphy is basically a geologic ap­ proach to the stratigraphic interpretation of seis­ mic data. The unique properties of seismic reflec­ tions allow the direct application of geologic concepts based on physical stratigraphy. Primary seismic reflections are generated by physical sur­ faces in the rocks, consisting mainly of stratal (bedding) surfaces and unconformities with ve­ locity-density contrasts. Therefore, primary seis­ mic reflections parallel stratal surfaces and un­ conformities. Whereas all the rocks above a stratal or uniformity surface are younger than those below it, the resulting seismic section is a record of the chronostratigraphic (time-stratigraphic) depositional and structural patterns and not a record of the time-transgressive lithostratigraphy (rock-stratigraphy). Because seismic reflections follow chronostrati­ graphic correlations, it is not only possible to in­ terpret postdepositional structural deformation, but also it is possible to make the following types