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Volume 13 Issue 4
Dec.  2002
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Qi Jiafu, Groshong Jr R H, Yang Qiao, Chen Shuping. Analysis Method for Predicting Strain in Interior Beds and Sub~Resolution Faults from Area Balance Theory in Extensional Basins. Journal of Earth Science, 2002, 4(4).
Citation: Qi Jiafu, Groshong Jr R H, Yang Qiao, Chen Shuping. Analysis Method for Predicting Strain in Interior Beds and Sub~Resolution Faults from Area Balance Theory in Extensional Basins. Journal of Earth Science, 2002, 4(4).

Analysis Method for Predicting Strain in Interior Beds and Sub~Resolution Faults from Area Balance Theory in Extensional Basins

  • Received Date: 2018-07-15
  • Rev Recd Date: 2018-07-15
  • Publish Date: 2018-07-15
  • Extensional basins include mainly grabens and half grabens displaced along a lower detachment. Based on area balance theory, there is a linear relationship between a height of regional and the lower detachment h on the outside of the basin and “lost area S” from the regional in the basin. The pre~growth beds above lower detachment are of the same extensional displacement so that an “S~h diagram” can be used to determine the depth to lower detachment and to calculate the total extensional displacement of the beds above the lower detachment. The extensional displacement is dominated by the heave of various scale normal faults. The displacement of obvious faults can be immediately figured out from the measured bed~length. The requisite extension calculated by area balance is the layer~parallel strain, which could be accommodated by displacement on sub~resolution faults. Accordingly, the layer~parallel strain can help us predict the magnitude and distribution of sub~resolution faults on the basis of analysis of the structural style and rheological behavior.
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Analysis Method for Predicting Strain in Interior Beds and Sub~Resolution Faults from Area Balance Theory in Extensional Basins

Abstract: Extensional basins include mainly grabens and half grabens displaced along a lower detachment. Based on area balance theory, there is a linear relationship between a height of regional and the lower detachment h on the outside of the basin and “lost area S” from the regional in the basin. The pre~growth beds above lower detachment are of the same extensional displacement so that an “S~h diagram” can be used to determine the depth to lower detachment and to calculate the total extensional displacement of the beds above the lower detachment. The extensional displacement is dominated by the heave of various scale normal faults. The displacement of obvious faults can be immediately figured out from the measured bed~length. The requisite extension calculated by area balance is the layer~parallel strain, which could be accommodated by displacement on sub~resolution faults. Accordingly, the layer~parallel strain can help us predict the magnitude and distribution of sub~resolution faults on the basis of analysis of the structural style and rheological behavior.

Qi Jiafu, Groshong Jr R H, Yang Qiao, Chen Shuping. Analysis Method for Predicting Strain in Interior Beds and Sub~Resolution Faults from Area Balance Theory in Extensional Basins. Journal of Earth Science, 2002, 4(4).
Citation: Qi Jiafu, Groshong Jr R H, Yang Qiao, Chen Shuping. Analysis Method for Predicting Strain in Interior Beds and Sub~Resolution Faults from Area Balance Theory in Extensional Basins. Journal of Earth Science, 2002, 4(4).

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