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首页> 外文期刊>Journal of Volcanology and Geothermal Research >Statistical data analysis of the CCDB (Collapse Caldera Database): Insights on the formation of caldera systems
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Statistical data analysis of the CCDB (Collapse Caldera Database): Insights on the formation of caldera systems

机译：CCDB（破火山口数据库）的统计数据分析：破火山口系统形成的见解

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Collapse calderas are one of the most important volcanic structures because of their hazard implications, but also because of their high energy potential and their association with mineral deposits of high economic interest. The worldwide Collapse Caldera Database (CCDB) [22], currently formed by 473 calderas and 28 variables, updates the current field based knowledge on calderas, merging together the existing databases, complementing them with new examples found in the bibliography and leaving it open for the incorporation of new data from future studies. The area of the caldera is a relevant indicator of the dynamics of the caldera system, as it is directly related to the size of the magma chamber and other variables of the volcanic systems such as crustal type, magma composition, and tectonic setting. Despite this being a generally assμmed geological belief, it has never been nμmerically studied. In this paper we have conducted a statistical analysis using ANOVA (Analysis of Variance) on a selected sample from the CCDB containing the relevant variables, in order to determine if the area of the collapse caldera depends on a group of geological characteristics or is it due to random variability alone, and if so, what is the relationship. The results identify three groups of collapse calderas in different geodynamic environments according to Crustal Type, Rock Suite and Plate Tectonic Setting, which we name GE, GE2 and GE3. These groups have significantly different Caldera Area, suggesting how the dynamics of the volcanic system hosting the collapse caldera are intrinsically related to the geodynamic environment where it develops.
机译：坍塌的火山口是最重要的火山结构之一，因为它们具有危害性，而且还具有很高的能源潜力以及与具有高经济价值的矿床的联系。目前由473个破火山口和28个变量组成的全球崩塌破火山口数据库（CCDB）[22]更新了基于现场的破火山口知识，将现有数据库合并在一起，并用书目中的新示例对其进行了补充，并为纳入未来研究中的新数据。火山口的面积是火山口系统动力学的重要指标，因为它直接关系到岩浆室的大小和火山系统的其他变量，例如地壳类型，岩浆成分和构造背景。尽管这是一个公认的地质观念，但从未对其进行数值研究。在本文中，我们使用ANOVA（方差分析）对从CCDB中选择的包含相关变量的样本进行了统计分析，以确定塌陷破火山口的面积是否取决于一组地质特征或是否应归因于随机变量，如果是这样，两者之间的关系是什么。研究结果根据地壳类型，岩石套件和板块构造背景确定了三组在不同地球动力学环境中的塌陷破火山口，我们将其命名为GE，GE2和GE3。这些组的破火山口面积大不相同，这表明容纳坍塌破火山口的火山系统的动力学如何与其发展的地球动力环境内在相关。

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