The archive includes the datasets for the manuscript (The 3-D density structure of the large shield volcanic structure in the Gardner region revealed by a new gravity inversion), which has been submitted to Geophysical Research Letters.
All data are organized according to the figure number in the paper. Details about data can be found in the paper.

Authors: Bo Chen1, Qian Huang, Jinsong Du, Shiyu Zhang, Jianxin Liu, and Changyi Xu
Contact: bochen@csu.edu.cn, xucy@mail.iggcas.ac.cn

Folder 1: Data for Figure 1. 
These datasets are used in Figure 1 in the manuscript. (a) The gravity anomalies produced by the synthetic model with 2% Gaussian noises, (b) the gravity anomalies recovered by the inversion with the optimal regularization factor (λ = 10.0), and (c) the differences between the observed and predicted fields. The synthetic model (d)-(f) and the resultant density model (g)-(i). In this folder, four datasets are included,

Observed gravity data for the model
Column 1: X (m)
Column 2: Y (m)
Column 3: ∆g_obs (mGal)

Predicted gravity data for the model
Column 1: X (m)
Column 2: Y (m)
Column 3: ∆g_pred (mGal)

Differences between the observed and predicted fields
Column 1: X (m)
Column 2: Y (m)
Column 3: ∆g_obs-∆g_pred (mGal)

Synthetic density model
Column 1: X (m)
Column 2: Y (m)
Column 3: Z (m)
Column 4: density contrast (g/cm3)

Predicted gravity data for the model
Column 1: X (m)
Column 2: Y (m)
Column 3: Z (m)
Column 4: density contrast (g/cm3)


Folder 2: Data for Figure 2
These datasets are used in Figure 2 in the manuscript. The topography and (c)-(d) Bouguer gravity anomalies in the Gardner region and surroundings. The topography data is generated by the NASA Planetary Data System - Geosciences Node's Orbital Data Explorer tool (https://ode.rsl.wustl.edu/moon/tools). The Bouguer gravity anomalies are derived from the gravity model GRGM1200L using a crustal density of 2550 kg/m3 for the terrain correction. 

Topography in the Gardner and surroundings
Column 1: Longitude
Column 2: Latitude
Column 3: Bouguer gravity (mGal)

Bouguer gravity in the Gardner and surroundings
Column 1: Longitude
Column 2: Latitude
Column 3: height (m)



Folder 3: Data for Figure 3
These datasets are used in Figure 3 in the manuscript. (a) The Bouguer gravity anomalies in the Gardner region using the Mercator projection, (b) the gravity field excluded the local anomalies (with a value of 3.4028234663853E+038), (c) the regional and (d) residual gravity anomalies obtained by the third-order polynomial trend analysis. In this folder, the four datasets are included,

Bouguer gravity anomalies with the Mercator projection
Column 1: X (km)
Column 2: Y (km)
Column 3: Bouguer gravity anomalies(mGal)

Bouguer gravity field excluded the local anomalies
Column 1: X (km)
Column 2: Y (km)
Column 3: Bouguer gravity anomalies (mGal)

Reginal gravity anomalies
Column 1: X (km)
Column 2: Y (km)
Column 3: Reginal gravity anomalies (mGal)

Residual gravity anomalies
Column 1: X (km)
Column 2: Y (km)
Column 3: Residual gravity anomalies (mGal)


Folder 4: Data for Figure 4
These datasets are used in Figure 4 in the manuscript. (a) The observed gravity anomalies after the third-order polynomial trend analysis, (b) the predicted gravity anomalies obtained by the inversion, and the differences between the observed and predicted anomalies (c). (d) The recovered density distributions in the Gardner region

Observed gravity data used for the inversion in the Gardner region
Column 1: X (m)
Column 2: Y (m)
Column 3: ∆g_obs (mGal)

Predicted gravity data obtained by the inversion
Column 1: X (m)
Column 2: Y (m)
Column 3: ∆g_pred (mGal)

Differences between the observed and predicted fields
Column 1: X (m)
Column 2: Y (m)
Column 3: ∆g_obs-∆g_pred (mGal)

Recovered density model by the inversion
Column 1: X (m)
Column 2: Y (m)
Column 3: Z (m)
Column 4: density contrast (g/cm3)

References
Goossens, S., Sabaka, T. J., Wieczorek, M. A., Neumann, G. A., Mazarico, E., Lemoine, F. G., Nicholas, J. B., Smith, D. E., & Zuber, M. T. (2020). High‐Resolution Gravity Field Models from GRAIL Data and Implications for Models of the Density Structure of the Moon's Crust, Journal of Geophysical Research: Planets, 125(2). https://doi.org/10.1029/2019je006086.
