Table 4 Characteristic distribution of floc sizes and settling velocities.

From: Measurement and modelling of deep sea sediment plumes and implications for deep sea mining

Particle size (μm)

Sediment

Crust debris

% mass

Characteristic settling velocity (mm/s)

% mass

Characteristic settling velocity (mm/s)

Laboratory experiments

Adjusted to deep sea temperature

Laboratory experiments

Adjusted to deep sea temperature

>160

54.25

13 or more

12 or more

37

12

11

120–160

23.25

7

6.5

20

10

9.2

40–120

10.5

2.6

2.4

20.5

3

2.7

<40

3.75

0.2

0.18

19

0.5

0.46

0.0

0.025

0.023

1

0.025

0.023

8.75

0.004

0.0036

2.5

0.004

0.0036