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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Morpho-chronology of monogenetic scoria cones from their level contour curves. Applications to the Chichinautzin monogenetic field, Central Mexico
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Morpho-chronology of monogenetic scoria cones from their level contour curves. Applications to the Chichinautzin monogenetic field, Central Mexico

机译：从其水平轮廓曲线的单一的蝎子锥体的形态学。应用于Chichinautzin Monogencic Field，中部墨西哥

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摘要

The genesis, distribution and hazards associated with monogenetic volcanic fields pose particular difficulties derived from their dispersed character. Establishing a relationship between the spatial and the age distributions of volcanic cones is necessary both to understand the nature of monogenetic field formation and evolution and to set supported hazard-assessment criteria. We present here a new method -specifically developed to quantify the degree of age-dependent erosion of individual scoria cones- aimed to estimate the relative ages of undated scoria cones in a monogenetic volcanic field from a contour level morphometric analysis of the field digital elevation model (DEM). This method is based on the hypothesis that age and the degree and type of erosion causing significant morphological changes on scoria cones are markedly correlated. It is assumed that, at the time of their formation, monogenetic volcanoes have diverse, yet smooth shapes, which mechanical processes of wearing gradually change in different spatial scales. This evolution is largely evidenced both as changes of the volcano slopes and as height-dependent undulations of the cone surface generated by the hydrometeorological ablation in the otherwise uniform elevation contour lines. Here, we characterize the time-dependence of the shape and size of the altitude isoline undulations by means of the Elliptical Fourier Descriptor spectra of the contour curves of volcanic cones. To test the effects of the DEM data type and resolution on this morpho-chronological dating, we analyze the correlations of published radiometric ages of cones with two datasets of contour curves from the Sierra Chichinautzin monogenetic volcanic field in Central Mexico (SCVF): one obtained from airborne LIDAR surveys (INEGI, Mexico) and the other from a satellite radar mission (DLR, Germany). (C) 2020 Elsevier B.V. All rights reserved.
机译：与单一的火山田相关的起源，分布和危害姿势源于分散特征的特殊困难。建立空间与火山锥的年龄分布之间的关系是必要的，以了解单一的田间形成和进化的性质，并设定支持的危险评估标准。我们在这里展示了一种新方法 - 基本上发展，以量化个体孢子患者的年龄依赖性侵蚀程度 - 旨在估计从现场数字高度模型的轮廓水平的轮廓水平形态学分析来估计未异常的火山锥体中未命中的天蝎座锥体的相对年龄（DEM）。该方法基于以下假设，即侵蚀的年龄和程度和类型，导致恶毒锥体的显着形态变化是显着的相关性的。假设在形成时，单体内火山具有多样化但光滑的形状，其机械过程穿着不同的空间尺度逐渐变化。这种进化在很大程度上证明了火山斜率的变化以及作为在其他均匀高度轮廓线中的水形气象消融产生的锥形表面的高度依赖性波动。这里，我们通过火山锥的轮廓曲线的椭圆形傅立叶描述符谱表征高度ISOLINE起波的形状和大小的时间依赖性。为了测试DEM数据类型和解决方案的影响，我们对该态度时间约会的影响，我们分析了来自墨西哥中部（SCVF）的塞拉基纳丁汀单一的火山田（SCVF）的两种轮廓曲线数据集的发表辐射曲线曲线的相关性：获得从机载LIDAR调查（Inegi，墨西哥）和另一个来自卫星雷达使命（DLR，德国）。 （c）2020 Elsevier B.v.保留所有权利。

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