The kinetics of ore deformation: Its illustration and analysis by means of deformation-mechanism maps
The kinetics of ore deformation: Its illustration and analysis by means of deformation-mechanism maps
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矿石变形动力学：通过变形机制图进行说明和分析
DOI：
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发表时间：
1977
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通讯作者：
B. Atkinson
中科院分区：
文献类型：
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作者：
B. Atkinson
摘要 描述了方铅矿、赤铁矿和磁铁矿变形机制图的构建。注意力集中在显示应力和温度场或应力和晶粒尺寸的图表上，其中塑性流动机制占主导地位。应变率等值线可以绘制在这些图表上，以便它们可以用来说明塑性流动行为并分析地质变形。例如，使用适当的地图来分析昆士兰州伊萨山和塔斯马尼亚州罗斯伯里的方铅矿矿石的变形。该图表明这些矿石经历了科布尔蠕变，并且它们仅承受非常低的变形应力。其他地图用于比较和对比自然构造变形过程中赤铁矿和磁铁矿的流变性。讨论了变形机制图的一些局限性，并举例说明了它们在概述未来研究的重要领域中的用途。
Abstract The construction of deformation-mechanism maps for galena, haematite and magnetite is described. Attention is focussed on diagrams which display the fields of stress and temperature or stress and grain size in which mechanisms of plastic flow are dominant. Strain-rate contours may be plotted on these diagrams, so that they can be used to illustrate plastic-flow behaviour and to analyse geological deformations. As an example, an appropriate map is used to analyse the deformation of galena ores at Mt. Isa, Queensland, and Roseberry, Tasmania. The map suggests that these ores have undergone Coble creep and that they have supported only very low deforming stresses. Other maps are used to compare and contrast the rheology of haematite and magnetite during natural tectonic deformation. Some limitations of deformation-mechanism maps are discussed and illustrations are given of their use in outlining important areas for future study.