Porphyroblast microstructures: A review of current and future trends
Porphyroblast microstructures: A review of current and future trends
复制标题
成斑细胞微观结构：当前和未来趋势回顾
DOI：
10.2138/am-1999-11-1202
复制
发表时间：
1999
影响因子：
3.1
通讯作者：
S. E. Johnson
中科院分区：
文献类型：
--
作者：
S. E. Johnson
摘要近年来的许多论文表明，变斑晶显微结构在构造和变质研究中起着重要作用。本文综述了这些显微构造的十个应用领域：（1）变斑晶的生长时间判据;（2）与变质条件变化相关的渐进叶理的追踪;（3）与变形和变质作用相关的岩体侵位时间;（4）有限纵向应变的测定;（5）运动学和变斑晶的旋转;（6）变斑晶中保存的线性组构的应用;（7）成斑岩和褶皱机制;（8）包裹体-尾迹方向和造山过程;（9）从成斑岩生长速率推断剪切-应变速率;（10）原位年龄测定。尽管对某些变斑晶显微结构的解释还没有达成共识，但随着传统的和新发展的显微结构分析技术与现代化学和微探针技术相结合，在广泛的变质环境中，对变形和变质之间的关系有了更深入的了解，一个光明的未来就在眼前。
Abstract Many recent papers show how porphyroblast microstructures play an important role in a wide range of structural and metamorphic studies. This paper reviews ten current applications of these microstructures: (1) porphyroblast growth-timing criteria; (2) tracking progressive foliation development relative to changing metamorphic conditions; (3) timing of pluton emplacement relative to deformation and metamorphism; (4) finite longitudinal strain determinations; (5) kinematics and porphyroblast rotation; (6) use of linear fabrics preserved in porphyroblasts; (7) porphyroblasts and folding mechanisms; (8) inclusion-trail orientations and orogenic processes; (9) inferring shear-strain rates from porphyroblast growth rates; and (10) in-situ age determinations. Although there is still no concensus on the interpretation of some porphyroblast microstructures, a bright future lies ahead as traditional and newly developed techniques of microstructural analysis are combined with modern chemical and microprobe techniques to provide an increased understanding of the relationships between deformation and metamorphism in a wide range of metamorphic settings.