Table 1 Mantle processing calculations.

From: Recycled arc mantle recovered from the Mid-Atlantic Ridge

Earth Radius (km)

Mantle subduction zone influx (km3 year−1)

Earth volume below 30 km (km3)

Mantle volume below 660 km (km3)

Mantle volume 660 to 30 km depth (km3)

Mantle processed since 2.5 Ga (km3)

Percent mantle processed since 2.5 Ga

6378

77

1.07E + 12

7.83E + 11

2.88E + 11

1.93E + 11

67%

  1. Mantle processing calculations based on mantle subarc melting region influx of 77 km3 per year of Jagoutz et al.60 and a volume of mantle between 30 and 660 km depth.
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