Anisotropy in the flexural response of the Indian Shield

作者：Nair Rajesh R^*; Singh Yudhvir; Trivedi Deshraj; Kandpal Suresh Ch

来源：Tectonophysics, 2012, 532: 193-204.

DOI：10.1016/j.tecto.2012.02.006

• Elastic thickness
• Mechanical strength
• Mechanical anisotropy
• Indian Shield
• Hermite tapers

We seek to determine the strain field which has accumulated in the Indian Shield due to the continental drift of Gondwanaland. We have used a method which involves the calculation of the 2D isostatic coherence response function between Bouguer gravity and topography as a function of azimuth by way of multispectrogram analysis. The average coherence is maximum consistently in the Indian Shield in a direction, which is at an angle of 45 degrees to the major trend of suture zones within the shield, a result which is in good agreement with the strain inferred from absolute plate motion (APM) in a hot spot reference frame. This directionality of mechanical plate weakness suggests that all paleostress fields were erased due to the movement of the Indian plate during the Himalayan orogeny.

• 出版日期2012-4-6