| 花岗闪长岩中剪切带构造岩的变形显微构造 |
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| 引用本文： | 何永年,S.H.Kirby,P.Segall.花岗闪长岩中剪切带构造岩的变形显微构造[J].地震地质,1983,5(1):9. |
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| 作者姓名： | 何永年 S.H.Kirby P.Segall |
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| 作者单位： | 国家地震局地质研究所
(何永年)，美国地质调查所
(S.H.Kirby)，美国地质调查所(P.Segall) |
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| 摘 要： | 本文讨论了美国加州内华达山花岗闪长岩体中剪切带构造岩的变形显微构造。利用化学浸蚀法揭示的动态重结晶石英颗粒粒度分布表明,石英粒度与岩性关系不大,但随着构造岩的剪切应变增大,粒度显著减小。因此,在较大的应变条件下,使用动态重结晶石英颗粒度古应力计时应当谨慎
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| 关 键 词： | 花岗闪长岩 剪切带 变形显微构造 构造岩 石英颗粒 差异应力 剪切应变 细晶岩脉 动态重结晶 古应力 |
DEFORMATION MICROSTRUCTURES WITHIN A SHEAR ZONE IN GRANODIORITE |
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| Abstract: | An E-W striking, subvertical shear zone in the granodiorite of Lake Edison, Central Sierra Nevada, California, U. S. A. was studied to determine the variation in deformation microstructures with distance from the shear zone center. Field and thin-onsecti relations demonstrate that the shear zone nucleated on a pre-existing quartz-filled fracture. Selective chemical etching was used to reveal dynamically recrystallized grain-boundaries of quartz in the granodiorite, offset aplite dike and deforme |
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