Graduation Year

2023

Document Type

Thesis

Degree

Master of Science

Department

Geology

Degree Granting Department

School of Geosciences

Major Professor

Sarah Kruse, Ph.D.

Committee Member

Glenn Thompson, Ph.D.

Committee Member

Jochen Braunmiller, Ph.D.

Keywords

geophysics, integrated geophysical methods, lava tubes, radar wave simulation

Abstract

Both seismic and ground penetrating radar (GPR) methods have been used separately to image geophysical wave velocities and layering in the shallow lunar subsurface. However, uncertainties in the interpretation of both types of data persist. Collection of both types of data at a given site could reduce uncertainties in both the positions and nature of contacts. We illustrate the potential benefits of coincident data acquisition through a hypothetical case study of a lunar “lava tube” represented by a half-cylindrical vacuum-filled void within a solid rock medium. Propagation of both active-source seismic and muti-offset ground-penetrating radar waves is numerically modelled through this synthetic geometry. Migration of these collocated datasets sequentially allows for the creation of an improved velocity model compared to either method separately. Using this velocity model, migration of the GPR dataset correctly resolves the vertical extent of the void and improves the resolution of the tube floor’s geometry.

Comments

DOI: 10.5038/SPTZ6958

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