Istituto Nazionale di Geofisica e Vulcanologia, Sezione di Pisa, 56126 Pisa, Italy.
J Synchrotron Radiat. 2010 Mar;17(2):215-21. doi: 10.1107/S0909049509048225. Epub 2010 Feb 2.
A series of computed microtomography experiments are reported which were performed by using a third-generation synchrotron radiation source on volcanic rocks from various active hazardous volcanoes in Italy and other volcanic areas in the world. The applied technique allowed the internal structure of the investigated material to be accurately imaged at the micrometre scale and three-dimensional views of the investigated samples to be produced as well as three-dimensional quantitative measurements of textural features. The geometry of the vesicle (gas-filled void) network in volcanic products of both basaltic and trachytic compositions were particularly focused on, as vesicle textures are directly linked to the dynamics of volcano degassing. This investigation provided novel insights into modes of gas exsolution, transport and loss in magmas that were not recognized in previous studies using solely conventional two-dimensional imaging techniques. The results of this study are important to understanding the behaviour of volcanoes and can be combined with other geosciences disciplines to forecast their future activity.
报道了一系列使用第三代同步辐射源进行的计算微断层扫描实验，这些实验是针对来自意大利各地的活火山和世界其他火山地区的各种火山岩进行的。所采用的技术能够在微米尺度上准确地对研究材料的内部结构进行成像，并生成研究样品的三维视图以及对结构特征进行三维定量测量。特别关注了玄武质和粗面质火山产物中气泡（充气空隙）网络的几何形状，因为气泡结构直接与火山排气的动力学有关。这项研究为理解岩浆中气体分离、传输和损失的模式提供了新的见解，而这些模式在以前仅使用传统二维成像技术的研究中并未被认识到。这项研究的结果对于理解火山的行为很重要，并可以与其他地球科学学科结合起来，预测它们未来的活动。
