DOI: 10.5061/dryad.bvq83bkfn
title: Data from: Gouge stability controlled by temperature elevation and obsidian addition in basaltic faults and implications for moonquakes

description: Basalt is a major component of the earth and moon crust. Mineral
 composition and temperature influence frictional instability and thus the
 potential for seismicity on basaltic faults. We performed
 velocity-stepping shear experiments on basalt gouges at a confining
 pressure of 100 MPa, temperatures in the range 100-400°C and with varied
 obsidian contents of 0-100 wt.% under wet/dry conditions to investigate
 the frictional strength and stability of basaltic faults. We observe a
 transition from velocity-neutral to velocity-weakening behaviors with
 increasing obsidian content. The frictional stability response of the
 mixed obsidian/basalt gouges is characterized by a transition from
 velocity-strengthening to velocity-weakening at 200°C and another
 transition to velocity-strengthening at &gt;300°C. Conversely,
 frictional strengths of the obsidian-bearing gouges are insensitive to
 temperature and wet/dry conditions. These results suggest that obsidian
 content dominates the potential seismic response of basaltic faults with
 the effect of temperature controlling the range of seismogenic depths.
 These observations contribute to a better understanding of the nucleation
 mechanism of shallow seismicity in basaltic faults.
description: # Data from: Gouge stability controlled by temperature elevation and
 obsidian addition in basaltic faults and implications for moonquakes
 ## Description of the data
 and file structure  **Data S1: **The friction-displacement data for all
 shear experiments on simulated basalt, obsidian, basalt-obsidian mixed
 gouges. **File lists (files found within DataS1.zip)**
 Cao_et_al_2023_LC1.xlsx Cao_et_al_2023_LC2.xlsx Cao_et_al_2023_LC3.xlsx
 Cao_et_al_2023_LC4.xlsx Cao_et_al_2023_LC5.xlsx Cao_et_al_2023_LC6.xlsx
 Cao_et_al_2023_LC7.xlsx Cao_et_al_2023_LC8.xlsx Cao_et_al_2023_LC9.xlsx
 **File description** Cao_et_al_2023_LC1.xlsx** – The shear displacement
 (column 1) and coefficient of friction (column 2) data for Experiment
 LC1.** Cao_et_al_2023_LC2.xlsx** – The shear displacement (column 1) and
 coefficient of friction (column 2) data for Experiment LC2.**
 Cao_et_al_2023_LC3.xlsx** – The shear displacement (column 1) and
 coefficient of friction (column 2) data for Experiment LC3.**
 Cao_et_al_2023_LC4.xlsx** – The shear displacement (column 1) and
 coefficient of friction (column 2) data for Experiment LC4.**
 Cao_et_al_2023_LC5.xlsx** – The shear displacement (column 1) and
 coefficient of friction (column 2) data for Experiment LC5.**
 Cao_et_al_2023_LC6.xlsx** – The shear displacement (column 1) and
 coefficient of friction (column 2) data for Experiment LC6.**
 Cao_et_al_2023_LC7.xlsx** – The shear displacement (column 1) and
 coefficient of friction (column 2) data for Experiment LC7.**
 Cao_et_al_2023_LC8.xlsx** – The shear displacement (column 1) and
 coefficient of friction (column 2) data for Experiment LC8.**
 Cao_et_al_2023_LC9.xlsx** – The shear displacement (column 1) and
 coefficient of friction (column 2) data for Experiment LC9.**