Reservoir |
Be, kg |
Be, kg/yr |
Be concentration |
Mantle1 |
2 x 1017 |
|
|
MORB source |
|
|
0.02-0.03 ppm* |
Intraplate source |
|
|
0.08-0.1 ppm* |
"Primitive mantle" |
|
|
~ 0.066 ppm* |
Oceans1 |
2.5 x 1011 |
|
0.2 pg/g (seawater) |
River inputs2 |
|
4 x 104 |
1.2 pg/g (river water) |
Aerosol inputs3 |
|
7-24 x 104 (?) |
|
Marine hydrothermal inputs4 |
|
1-5 x 104 |
0.1-0.4 ng/g (endmember vent fluids) |
Marine Sediments5 |
6 x 1014 |
|
1.5 ppm |
Continents1 |
3 x 1016 |
|
1.5 ppm |
Additions to ocean crust via MORB magmatism5 |
|
9.9 x 106 |
0.3 ppm (MORB) |
Sediment Subduction5 |
|
1.5 x 106 |
1.5 ppm (sediments) |
Additions to the continents via arc magmatism5 |
|
1.6 x 106 |
0.5 ppm (Arc basalts) |
*Inverse modeling results for MORB suites (Ryan and Langmuir 1988) and inferences from Be/Nd ratios.