Abstract
One of the Major Advances in Mineral Physics and Seismology is the Realization that Different Olivine Fabric Types Are Functions of Temperature, Shear Stress, and Water Content in Oceanic Subducting Systems. the Distribution of Different Olivine Fabric Types and Geodynamic Processes in the Mantle Wedge above a Subducting Continental Slab Remain Poorly Understood. Here, based on Splitting Analysis of Shear Waves Recorded by 46 Stations Recently Deployed in Central Myanmar, We Reveal Trench-Perpendicular Fast Orientations between the 80 and 100 Km Slab Contours Sandwiched between Trench-Parallel Fast Orientations from the Mantle Wedge Tip to the Backarc. the Dramatic Change in Fast Orientations Indicates the Transition of Olivine Fabric Types in the Mantle Wedge Combined with Corner Flow. Cold Continental Sub-Duction and Shear Stress Reduction Caused by Partial Melting Favor B-Type and C- or E-Type Olivine Fabrics, Respectively.
Recommended Citation
E. Fan and Y. Ai and S. S. Gao and Y. He and K. H. Liu and M. Jiang and G. Hou and S. Yang and C. T. Mon and M. Thant and K. Sein, "Mantle Flow and Olivine Fabric Transition in the Myanmar Continental Subduction Zone," Geology, vol. 52, no. 4, pp. 225 - 229, Geological Society of America, Jan 2024.
The definitive version is available at https://doi.org/10.1130/G51698.1
Department(s)
Geosciences and Geological and Petroleum Engineering
Publication Status
Open Access
International Standard Serial Number (ISSN)
1943-2682; 0091-7613
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2024 Geological Society of America, All rights reserved.
Publication Date
01 Jan 2024
Comments
National Natural Science Foundation of China, Grant 42030309,42130308