Model of layering formation in a mantle peridotite (Horoman, Hokkaido, Japan)
Model of layering formation in a mantle peridotite (Horoman, Hokkaido, Japan)
复制标题
地幔橄榄岩层状形成模型（日本北海道霍罗马）
DOI：
10.1016/s0012-821x(00)00382-4
复制
发表时间：
2001
影响因子：
5.3
通讯作者：
K. Matsukage
中科院分区：
文献类型：
--
作者：
A. Toramaru;E. Takazawa;T. Morishita;K. Matsukage
霍罗曼橄榄岩杂岩具有明显的层状结构。通过地质岩石学调查发现，层状格局具有对称、不对称（微缩对称）和尺度不变性三个特征。特别是在阿皮达克峰北脊和博祖山峰西脊的基性层序中，对称和不对称格局明显。我们提出了一个简单的数学模型，描述了变形过程中的拉伸（变薄）和折叠，说明了这三个特征。该模型定量再现了基性层宽度累积频率分布的斜率，表明频率分布受空间应变对比的强烈影响。将模型结果应用于基性层观测资料，发现应变率最高和最低区域之间的应变差约为几倍至10倍。
The Horoman peridotite complex exhibits a conspicuous layered structure. It is found, from the geological and petrological survey, that the pattern of layering has three characteristics: symmetry, asymmetry (subtly collapsed symmetry) and scale invariance. Especially, symmetric and asymmetric patterns clearly recognized in the sequence of mafic layers at the Northern ridge of Apoi-dake peak, and at the Western ridge of Bozu-yama peak are noticeable. We present a simple mathematical model describing stretching (thinning) and folding during deformation that accounts for the three characteristics. The model quantitatively reproduces the slope in cumulative frequency distribution of the width of mafic layers and indicates that the frequency distribution is strongly influenced by the spatial strain contrast. Applying the model result to the observational data for mafic layers, it is found that the strain contrast approximately ranges several to 10 times between regions with the highest and the lowest strain rates.
DOI：
--
发表时间：
2020
期刊：
影响因子：
--
作者：
Hironori Ito;Tetsuo Nakano;Shintaro Nomura and Kazuhiko Misawa;井上紗奈・本田秀仁・森数馬・椎名武夫・山本(前田)万里・曲山幸生・永井成美・和田有史;Guest Martin;Zin Arai
通讯作者：
Zin Arai