Multiple successions of foliation development in shallow versus deep orogenic regimes and their relationship to regional folding
Cao, Hui (2010) Multiple successions of foliation development in shallow versus deep orogenic regimes and their relationship to regional folding. Proceedings of 10th International Multidisciplinary Scientific Geoconference. SGEM 2010 10th International Multidisciplinary Scientific Geoconference , 20-26 June 2010, Albena, Bulgaria , pp. 121-128.
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Fold axial plane traces and schistosity in the high temperature-low pressure regime PreCambrian rocks in Arkansas River region preserve the effects of a succession of 5 FIA trends (foliation intersection or inflection axes in porphyroblasts). Similar fold axial plane trace measurements in high temperature-medium pressure regime Palaeozoic rocks in Vermont preserve the effects of only the youngest two NNW-SSE and NNE-SSW trending FIAs of the 5 sets that developed in this region. The other three have no equivalent fold axial planes. This difference from shallow to deeper orogenic regimes reflects decreasing competency at greater pressure with collapse and unfolding of earlier formed folds. The greater overlying load of rocks tends to flatten folds preserving only those most recently developed or the folds.
|Item Type:||Conference Item (Refereed Research Paper - E1)|
|Keywords:||Fold axial plane, Foliation intersection axes, Orogenic regime, Folding|
|FoR Codes:||04 EARTH SCIENCES > 0403 Geology > 040312 Structural Geology @ 100%|
|SEO Codes:||97 EXPANDING KNOWLEDGE > 970104 Expanding Knowledge in the Earth Sciences @ 100%|
|Deposited On:||01 Jun 2011 08:27|
|Last Modified:||01 Jun 2011 15:40|
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