Antarctic lithosphere heterogeneity and its influence on solid-earth and cryosphere interactions

Lu Li

doi:10.26182/bkma-bx79

Antarctic lithosphere heterogeneity and its influence on solid-earth and cryosphere interactions

Lu Li

School of Earth Sciences

Research output: Thesis › Doctoral Thesis

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Abstract

The lithosphere underneath the Antarctic ice-sheet is geologically complex. It interacts with the ice-sheet by providing fundamental control for ice-sheet flow. However, its heterogeneity is poorly understood, which limits our capacity to predict Antarctic ice-sheet evolution in the future. In this thesis, I use machine learning method and gravity inversion to build a self-consistent 3D lithosphere model. Model results reveal density distributions and important surfaces, including sedimentary basin, Moho, and lithosphere and asthenosphere boundary. Based on the newly resolved structure, I explore the related physical processes and basal boundary conditions for understanding ice-sheet flow.

Original language	English
Qualification	Doctor of Philosophy
Awarding Institution	The University of Western Australia
Supervisors/Advisors	Aitken, Alan, Supervisor Lindsay, Mark, Supervisor Jessell, Mark, Supervisor Gross, Lutz, Supervisor, External person Reading, Anya M., Supervisor, External person
Award date	13 Apr 2023
DOIs	https://doi.org/10.26182/bkma-bx79
Publication status	Unpublished - 2022

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THESIS - DOCTOR OF PHILOSOPHY - LI Lu - 2023
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Cite this

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AB - The lithosphere underneath the Antarctic ice-sheet is geologically complex. It interacts with the ice-sheet by providing fundamental control for ice-sheet flow. However, its heterogeneity is poorly understood, which limits our capacity to predict Antarctic ice-sheet evolution in the future. In this thesis, I use machine learning method and gravity inversion to build a self-consistent 3D lithosphere model. Model results reveal density distributions and important surfaces, including sedimentary basin, Moho, and lithosphere and asthenosphere boundary. Based on the newly resolved structure, I explore the related physical processes and basal boundary conditions for understanding ice-sheet flow.

KW - Antarctica

KW - lithosphere

KW - gravity

KW - sedimentary basin

KW - geophysics

KW - ice dynamics

KW - heat flow

KW - machine learning

U2 - 10.26182/bkma-bx79

DO - 10.26182/bkma-bx79

M3 - Doctoral Thesis

ER -

Antarctic lithosphere heterogeneity and its influence on solid-earth and cryosphere interactions

Abstract

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