Doctoral Dissertations

Keywords and Phrases

Mantle transition zone; Receiver functions; Tibetan plateau

Abstract

"The Tibetan Plateau represents the ongoing geotectonic aftermath of a continental collision initiated approximately 65 million years ago. Despite numerous seismological studies, controversies remain regarding the structure, evolution, and dynamics of the crust and mantle beneath Tibetan Plateau. In this study, we used teleseismic broadband data to investigate the topography of the mantle transition zone (MTZ) discontinuities. A total of ~655,000 receiver functions from 735 stations was utilized to image the 410 and 660 km discontinuities bordering the MTZ. Combining the observed and velocity corrected results, several areas in the central Tibet exhibit a typical d410 and an anomalously deep d660, which can be ascribed to the combined impact of the thermal anomaly and dehydration associated with the subducted Indian Plate that has penetrated at least to the d660 depth. The anomalous thickening of the MTZ beneath the southeastern Tibetan Plateau surrounding the Tengchong volcanic field can be explained by the dehydration of the subducted Indian Slab. Significant thinning of the MTZ associated with the deepening of the d410 beneath western Tian Shan may indicate active thermal upwelling originating from the MTZ" -- Abstract, p. iv

Advisor(s)

Gao, Stephen S.

Committee Member(s)

Liu, Kelly H.
Yang, Wan
Flori, Ralph E.
Deng, Wen

Department(s)

Geosciences and Geological and Petroleum Engineering

Degree Name

Ph. D. in Geology and Geophysics

Publisher

Missouri University of Science and Technology

Publication Date

Summer 2024

Pagination

x, 113 pages

Note about bibliography

Includes_bibliographical_references_(pages 28 & 112)

Rights

©2024 Zexin Miao , All Rights Reserved

Document Type

Dissertation - Open Access

File Type

text

Language

English

Thesis Number

T 12397

Electronic OCLC #

1477927821

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