Extensive seismic anisotropy in the lower crust of Archean metamorphic terrain, South India, inferred from ambient noise tomography
详细信息 查看全文
- 作者：Ritima Das ; ritima08@gmail.com ; S.S. Rai
- 关键词：Ambient noise tomography ; Phase velocity ; Seismic anisotropy ; South India
- 刊名：Tectonophysics
- 出版年：2017
- 出版时间：2 January 2017
- 年：2017
- 卷：694
- 期：Complete
- 页码：164-180
- 全文大小：5361 K
- 卷排序：694
文摘
In upper crust of south India, anisotropy coefficient is − 2 to + 3% and at deeper level, except for the Archean metamorphic terrain, most part has anisotropy of up to 5%. Beneath the Archean metamorphic terrain, the anisotropy is up to 9% in the depth range of 20-40 km. The observed higher anisotropy in the lower crust implies the presence of high micaceous minerals or presence of amphiboles.