Table 1 Summary of the data analysis
Mare Imbrium | Oceanus Procellarum | Mare Crisium | Mare Serentitatis | |||||
|---|---|---|---|---|---|---|---|---|
Latitude Longitude | 35–40°N 345.386E | 40–45°N 345.308E | 40–45°N 297.037E | 45–50°N 297.003E | 10–15°N 57.793E | 15–20°N 57.784E | 20–25°N 20.797E | 25–30°N 20.853E |
Age [100 Ma] | 35.2 | 34.4 | 35.0 | 34.9 | ||||
S (Fe + Ti wt%) | 16.86 | 16.31 | 14.26 | 12.41 | 10.61 | 12.50 | 15.36 | 13.95 |
ε1 | 3.91–6.37a | 4.04–5.53 | 3.49–5.38b | 2.96–4.54 | 3.23–3.60c | 3.15–4.37 | 3.29–5.81 | 3.06–5.74 |
εgrain | 6.60 | 6.56 | 6.41 | 6.29 | 6.17 | 6.29 | 6.49 | 6.39 |
Apparent depth (m) | 500 | 400 | 300 | 350 | ||||
Actual depth (m) | 198–253 | 213–249 | 172–214 | 188–233 | 158–167 | 143–169 | 145–193 | 146–200 |
p (%) | 1.8–27.8 | 9.1–25.7 | 9.5–32.8 | 17.7–41.1 | 29.6–35.6 | 19.8–37.7 | 6.0–36.4 | 5.8–39.6 |
tanδ1 (× 10–2) | 1.05–1.53 | 1.03–1.31 | 0.77–1.07 | 0.58–0.81 | 0.53–0.58 | 0.61–0.79 | 0.81–1.25 | 0.68–1.10 |
σ1 (× 10–5 S/m) | 1.14–2.71 | 1.16–2.01 | 0.75–1.61 | 0.48–1.02 | 0.48–0.58 | 0.54–0.96 | 0.74–2.02 | 0.58–1.76 |
σ2 | 6.81–21.28 | 7.81–14.61 | 6.17–15.44 | 4.84–12.26 | 4.25–12.52d | 6.55–9.63 | 6.13–13.35 | 5.78–13.59 |
# of subsurface echoes | 221 | 162 | 586 | 427 | 1025 | 1274 | 634 | 345 |