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Table 1 Densities of rock units

From: 3D geophysical inversion modeling of gravity data to test the 3D geologic model of the Bradys geothermal area, Nevada, USA

Rock unit Rock type Starting density (g/cm3) Homogeneous unit density inversion output (g/cm3) Heterogeneous unit density inversion output (g/cm3) Abundance of the rock unita (%)
Q Quaternary sediments 1.9 2.33 1.9 (fixed) 0.5
Tsy Miocene sediments 2.1 2.09 2.03–2.15 3.2
Tsl Miocene lacustrine sediments 1.7 2.2 2.14–2.20 3.0
Tls Miocene limestone 2.35 2.46 2.40–2.52 0.6
Tbo Miocene basalt 2.7 2.55 2.49–2.61 20.3
Tpd Miocene dacite and rhyodacite flows and domes 2.4 2.04 1.98–2.10 0.3
Tlr Miocene rhyolite lavas and tuffs 2.15 2.3 2.24–2.36 0.3
Tda Miocene andesite and dacite lavas 2.5 2.1 2.04–2.16 15.8
Trt Oligocene ash flow tuffs 2.3 2.74 2.68–2.80 11.1
Mzu Mesozoic undivided basement (meta-sedimentary and granitic rocks) 2.8 2.6 2.54–2.66 44.9
  1. Density values for rock types at Bradys geothermal area: assumed starting densities, density results from the homogeneous rock unit geophysical inversion modeling, and density results from the heterogeneous rock unit geophysical inversion modeling (assumed starting densities were guided by values from analogous rock units in northwestern Nevada; Drakos 2007)
  2. aAs a percentage of the total model volume