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MULTIPLE SUCCESSIONS OF FOLIATION DEVELOPMENT IN SHALLOW VERSUS DEEP OROGENIC REGIMES AND THEIR RELATIONSHIP TO REGIONAL FOLDING

H. Cao

First published: 2010DOI pendingView metrics

Abstract

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 NNESSW 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

Publication details

Title
MULTIPLE SUCCESSIONS OF FOLIATION DEVELOPMENT IN SHALLOW VERSUS DEEP OROGENIC REGIMES AND THEIR RELATIONSHIP TO REGIONAL FOLDING
Authors
H. Cao
Proceedings
10th International Multidisciplinary Scientific GeoConference SGEM2010
Publisher
SGEM Scientific GeoConference
Year
2010
Pages
121-128
SWS Citekey
Cao2010364
ISSN
1314-2704
ISBN
954-91818-1-2
Language
en
Publication type
Conference Paper
Keywords
Fold axial planeFoldingFoliation intersection axesOrogenic regime
References25

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