地质学报（英文版）2009，Vol.83Issue(5)：971-984,14.
FIAs (Foliation Intersection/Inflection Axes) Preserved in Porphyroblasts,the DNA of Deformation: A Solution to the Puzzle of Deformation and Metamorphism in the Colorado, Rocky Mountains, USA
FIAs (Foliation Intersection/Inflection Axes) Preserved in Porphyroblasts,the DNA of Deformation: A Solution to the Puzzle of Deformation and Metamorphism in the Colorado, Rocky Mountains, USA
SHAH Afroz Ahmad1
作者信息
- 1. School of Earth and Environmental Sciences, James Cook University, Townsville Queensland Australia
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摘要
Abstract
FIAs have been used extensively for more than a decade to unravel deformation and metamorphic puzzles. Orogenic processes developing early during the history or orogenesis challenge scientists because compositional layering in rocks always reactivates where multiple deformations have occurred, leaving little evidence of the history of foliation development preserved in the matrix. The foothills of the Rocky Mountains in Colorado, USA contain a succession of four FIA sets (trends) that would not have been distinguishable if porphyroblasts had not grown during the multiple deformation events that affected these rocks or if they had rotated as these events took place. They reveal that both the partitioning of deformation and the location of isograds changed significantly as the deformation proceeded.关键词
foliation intersection/inflection axes/ porphyroblast/ deformatlonal partitioningKey words
foliation intersection/inflection axes/ porphyroblast/ deformatlonal partitioning分类
天文与地球科学引用本文复制引用
SHAH Afroz Ahmad..FIAs (Foliation Intersection/Inflection Axes) Preserved in Porphyroblasts,the DNA of Deformation: A Solution to the Puzzle of Deformation and Metamorphism in the Colorado, Rocky Mountains, USA[J].地质学报（英文版）,2009,83(5):971-984,14.
