Data from: Shallow moonquake mechanisms illuminated by rheologic characteristics of basaltic gouges

Zhang, Fengshou1 ; Zhao, Wenzhi1 ; An, Mengke1 ; Shen, Xianda1 ; Tang, Jizhou1 ; Zhao, Luanxiao1 ; Liu, Hai2 ; Elsworth, Derek3 ; Zhu, Hehua1 ; He, Manchao4

Published Aug 24, 2023; Updated Oct 18, 2023 on Dryad. https://doi.org/10.5061/dryad.18931zd3b

Data files

Aug 24, 2023 version files 4.35 MB

Experimental_data.xlsx
4.33 MB
README_for_Experimental_data.docx
18.19 KB

Oct 18, 2023 version files 4.34 MB

Experimental_data.xlsx
4.33 MB
README.md
5.69 KB

Abstract

The projected evolutionary history of the Moon and observed occurrence of moonquakes suggest that brittle faulting is present in the shallow lunar crust. Chang'e 5 samples of lunar regolith show a mineral composition almost identical to basaltic bedrock. We measure the friction-stability characteristics of dry synthetic gouges representative of basaltic faults assumed to be present in the lunar crust. Frictional strengths are ~0.7 and exhibit overall velocity-strengthening response but transition to velocity-weakening at intermediate temperatures (100-300℃) and stresses (10-100 MPa). Bounding temperature profiles representative of the lunar crust suggest that moonquakes are feasible throughout the shallowest ~40-60 km of the crust. However, observations of unusually high stress drops (up to 210 MPa) are inconsistent with the measured frictional strengths – suggesting that high degrees of healing on preexisting faults or intact crust are present – to augment stress accumulation mechanisms due to tidal forcing or differential thermal cooling.

README: Data from: Shallow moonquake mechanisms illuminated by rheologic characteristics of basaltic gouges

https://doi.org/10.5061/dryad.18931zd3b

Fengshou Zhang, Wenzhi Zhao, Mengke An, Xianda Shen, Jizhou Tang, Luanxiao Zhao, Hai Liu, Derek Elsworth, Hehua Zhu, Manchao He. Shallow moonquake mechanisms illuminated by rheologic characteristics of basaltic gouges. Journal of Geophysical Research: Planets.


Experimental data:
The friction-displacement data for all shear experiments on simulated mare basaltic gouges.


Authors:
Fengshou Zhang
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
fengshou.zhang@tongji.edu.cn

Wenzhi Zhao
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
wenzhizhao@tongji.edu.cn

Mengke An
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
2015mengkean@tongji.edu.cn

Xianda Shen
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
xiandashen90@gmail.com

Jizhou Tang
State Key Laboratory of Marine Geology, Tongji University, Shanghai, China
jeremytang@tongji.edu.cn

Luanxiao Zhao
State Key Laboratory of Marine Geology, Tongji University, Shanghai, China
zhaoluanxiao@tongji.edu.cn

Hai Liu
School of Civil Engineering, Guangzhou University, Guangzhou, China
hliu@gzhu.edu.cn

Derek Elsworth
Department of Energy and Mineral Engineering, EMS Energy Institute and G3 Center, The Pennsylvania State University, University Park, PA 16802, USA
Department of Geosciences, The Pennsylvania State University, University Park, PA 16802, USA
elsworth@psu.edu

Hehua Zhu
Department of Geotechnical Engineering, College of Civil Engineering, Tongji University, Shanghai 200092, China
Key Laboratory of Geotechnical & Underground Engineering of Ministry of Education, Tongji University, Shanghai 200092, China
zhuhehua@tongji.edu.cn

Manchao He
State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Beijing, China
hemanchao@263.net

File lists:
Experimental data.xlsx

Description of the data and file structure

Velocity dependence data is calculated based on a rate-state friction law(RSF).
File structure:
Experimental data.xlsx – Sheet CE5SIM-1 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-1.
Experimental data.xlsx – Sheet CE5SIM-2 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-2.
Experimental data.xlsx – Sheet CE5SIM-3 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-3.
Experimental data.xlsx – Sheet CE5SIM-4 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-4.
Experimental data.xlsx – Sheet CE5SIM-5 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-5.
Experimental data.xlsx – Sheet CE5SIM-6 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-6.
Experimental data.xlsx – Sheet CE5SIM-7 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-7.
Experimental data.xlsx – Sheet CE5SIM-8 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-8.
Experimental data.xlsx – Sheet CE5SIM-9 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-9.
Experimental data.xlsx – Sheet CE5SIM-10 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-10.
Experimental data.xlsx – Sheet CE5SIM-11 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-11.
Experimental data.xlsx – Sheet CE5SIM-12 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-12.
Experimental data.xlsx – Sheet CE5SIM-13 – The shear displacement (the first column: Sheardisp) and friction coefficient (the second column: μ) data for Experiment CE5SIM-13.