Frontoni Alessandro, Costa Antonio, Vona Alessandro, Romano Claudia
Dipartimento di Scienze, sez. Geologia, Università degli Studi Roma Tre, L.go San Leonardo Murialdo 1, 00146, Rome, Italy.
Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Bologna, Via Donato Creti, 12, 40128, Bologna, Italy.
Sci Data. 2022 May 30;9(1):247. doi: 10.1038/s41597-022-01363-w.
In this work, we present a comprehensive rheological database including most of the existing data relevant for crystal-bearing magmas collected from the scientific literature, covering the entire range of natural volcanic conditions, in terms of crystal content (1-80%), crystal shape (aspect ratio R from 1 to 13), and strain rate (between 10 and 10s). Datasets were collected and discerned as a function of the information which we considered necessary for building a general systematic model describing relative viscosity of crystal-bearing magmas, such as the apparent and melt viscosity, the crystal concentration, crystal shape, and the strain rate. The selected dataset was then used for modelling the relative viscosity of a liquid-solid mixture having different concentrations of particles with different R, subjected to different strain rates. The proposed model allows us to quantitatively describe the rheological behaviour of crystal-bearing magmatic systems.
在这项工作中，我们展示了一个全面的流变学数据库，其中包括从科学文献中收集的与含晶体岩浆相关的大部分现有数据，涵盖了自然火山条件的整个范围，包括晶体含量（1% - 80%）、晶体形状（纵横比R为1至13）和应变速率（介于10⁻⁶和10⁻¹s之间）。数据集是根据我们认为构建描述含晶体岩浆相对粘度的通用系统模型所需的信息收集和区分的，这些信息包括表观粘度和熔体粘度、晶体浓度、晶体形状和应变速率。然后，所选数据集用于模拟具有不同R值、不同浓度颗粒且承受不同应变速率的液 - 固混合物的相对粘度。所提出的模型使我们能够定量描述含晶体岩浆系统的流变行为。
