搜索结果: 1-6 共查到“地球物理学 mA”相关记录6条 . 查询时间(0.057 秒)
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NC:红海演化新模型——13 Ma海底扩张贯穿红海(图)
NC 红海 演化 海底扩张
2021/6/30
红海是地球上最年轻的海盆之一,是研究大陆裂谷作用和向海洋扩张过渡的典型地区,具有重要的地质意义。但是关于红海的构造演化模型存在很多争议(Coleman, 1988; Ghebreab, 1998; Almalki et al., 2015; Schettino et al., 2016),不同模型中红海开始发生大陆裂解的年龄和扩张程度,特别是红海(超)慢扩张中心的最大向北的范围各不相同。这导致我们...
随机介质是描述地球介质小尺度非均匀性的有效模型,在地震散射波场分析、储层描述等领域具有广泛应用,快速准确的随机介质建模方法是开展相关研究的基础与前提.本文首次将FFT-MA(Fast Fourier Transform Moving Average)算法引入到随机介质建模研究中,分析了该方法与传统随机介质建模方法相比具有的优势,并提出了基于FFT-MA的非平稳随机介质建模方法.建模实验表明,与传统...
Magnetic signature of large exhumed mantle domains of the Southwest Indian Ridge – results from a deep-tow geophysical survey over 0 to 11 Ma old seafloor
Magnetic signature large exhumed mantle domains the Southwest Indian Ridge deep-tow geophysical survey 0 to 11 Ma old seafloor
2015/1/6
We investigate the magnetic signature of ultramafic seafloor in the eastern part of the Southwest Indian Ridge (SWIR). There, detachment faulting, continuous over 11 Myr, exhumed large areas of mantle...
基于FFT-MA谱模拟的快速随机反演方法研究
地质统计学 FFT-MA谱模拟 GDM算法更新 随机反演
2015/3/4
虽然基于地质统计学的随机反演方法能够有效融合测井资料中的高频信息,但计算效率低,占用内存大,限制了它在实际资料中的应用.本文在保留传统随机反演方法优点的基础上,创造性地引入傅里叶滑动平均(Fast Fourier Transform-Moving Average, FFT-MA)谱模拟进行频率域的地质统计模拟,并利用逐步变形算法(Gradual Deformation Method,GDM)确保模...
Paleo-erosion rates in Central Asia since 9 Ma: A transient increase at the onset of Quaternary glaciations?
Quaternary glaciation erosion rates Tianshan cosmogenic nuclide magnetostratigraphy 10 Be
2014/4/15
Erosion is a fundamental player of the interactions existing between internal geodynamics and climate, in particular through its influence on the carbon dioxide budget. However, long term (N1 Ma) eros...