The role of transiently fine-grained reaction products in syntectonic metamorphism: natural and experimental examples
The role of transiently fine-grained reaction products in syntectonic metamorphism: natural and experimental examples
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DOI：
10.1139/e87-054
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发表时间：
1987-03
影响因子：
1.4
通讯作者：
K. Brodie;E. Rutter
中科院分区：
文献类型：
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作者：
K. Brodie;E. Rutter
本文提出变形与变质作用之间最重要的相互关系机制之一是变质反应形成细粒产物所产生的几种晶粒尺寸敏感变形机制之一的促进作用。在渐进变质过程中，这种影响可能是暂时的，因为晶粒粗化和结构平衡可能是对温度升高条件的反应。因此，变形机制往往难以从这种自然变形的岩石中推断出来。在表现退变作用的局部剪切带中，这种机制增强变形能力的证据最有可能被保存下来，因为冷却条件抑制了晶粒的生长，变形和未变形的岩石都有可能被保存下来。在控制孔隙压力的条件下，研究了变形对蛇纹石的影响。明显的弱化（近似线性的粘性流变）。
It is proposed that one of the most important mechanisms of interrelationship between deformation and metamorphism is the facilitation of one of several grain-size-sensitive deformation mechanisms resulting from the formation of fine-grained products of a metamorphic reaction. During prograde metamorphism, such effects are likely to be transient, because grain coarsening and textural equilibration are likely in response to rising temperature conditions. Thus deformation mechanisms are often difficult to infer from such naturally deformed rocks.In localized shear zones exhibiting retrogressive metamorphism, evidence of enhanced deformability by such mechanisms is most likely to be preserved, because cooling conditions inhibit grain growth and both deformed and undeformed rocks are likely to be preserved.An experimental study has been made of the effects of deformation on serpentinite under conditions of progressive dehydration but with controlled pore pressure. A marked weakening (near-linear viscous rheol...