Table 3. Thicknesses of the oceanic crustal layers in the Southeast Greenland SDRS.
| Calculated from basalt compositions | Geophysical model* | |||||
|---|---|---|---|---|---|---|
Mol% |
Km |
Density |
Km |
Density |
||
Total igneous crust: |
100 |
18.0 |
18.0 |
|||
Olivine cumulates: |
30 |
5.4 |
3.35 |
4.3 |
3.12 |
|
Gabbro cumulates: |
14** |
2.5 |
3.03 |
4.0 |
2.90 |
|
Dikes and lava flows: |
56 |
10.1 |
9.7 |
2.80 |
||
Notes: * = Model from H.C. Larsen et al. (1998), based on reflection seismic and gravity data. = Total melt km taken from geophysical model of H.C. Larsen et al. (1998). ** = Amount of gabbro cumulates calculated from average degree of fractionation of lavas in SDRS. = The calculated densities do not take any interstitial melt into account. See text for details.