Survival Conditions of Folding in Different Depth During Orogenesis‐Deformation in Texas Creek and Chester Dome, USA
Survival Conditions of Folding in Different Depth During Orogenesis‐Deformation in Texas Creek and Chester Dome, USA
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DOI：
10.1111/1755-6724.12185
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发表时间：
2014-02
期刊：
影响因子：
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通讯作者：
H. Cao;Cui-ping Xu
中科院分区：
文献类型：
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作者：
H. Cao;Cui-ping Xu
阿肯色州河地区德克萨斯溪前寒武纪岩石中保存的一系列5个FIA趋势（叶理交叉或成斑晶中的拐点轴），反映在该地区的褶皱轴面痕迹和密度数据中。类似的褶皱轴向平面轨迹数据测量古生代岩石在切斯特圆顶，佛蒙特州，这是高温到中压制度，只保留最年轻的FIA的所有5个FIA集，在这个地区获得的效果。其他三个FIA集没有等效的褶皱轴面。这种从浅到深的造山机制的差异反映了在更大的压力下，早期形成的褶皱的坍塌和展开能力的下降。更大的岩石上覆荷载往往会使所有的早期形成的结构变平，只有那些最近开发的褶皱才能保留下来。
A succession of 5 FIA trends (foliation intersection or inflection axes in porphyroblasts) preserved in high temperature‐low pressure regime PreCambrian rocks in the Texas Creek, Arkansas River region reflected by the fold axial plane traces and schistosity data in this region. Similar fold axial plane trace data measured in Palaeozoic rocks in Chester Dome, Vermont, which is high temperature to medium pressure regime, only preserve the effects of the youngest FIAs of the all 5 FIA sets that obtained in this region. The other three FIA sets 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 has tended to flatten all but the very largest early‐formed structures, preserving only those folds that were more recently developed.