DOI: 10.5061/dryad.18931zd3b
title: Data from: Shallow moonquake mechanisms illuminated by rheologic characteristics of basaltic gouges

description: 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.
description: # Data from: Shallow moonquake mechanisms illuminated by rheologic
 characteristics of basaltic gouges
 [https://doi.org/10.5061/dryad.18931zd3b](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.