Karlsen et al. (2021)
developed a model of past seafloor ages,
extending back to 400 Ma. This model is based on on
the TracTec algorithm developed by
Karlsen et al. (2020)
applied to the tectonc reconstruction of
Matthews et al. (2016),
which was updated according to
Torsvik et al. (2019).
This reconstruction extends back to 400 Ma and continues to the present
day. The age grids from this seafloor age
reconstruction model are available below.
Note that the Karlsen et al. (2020)
algorithm uses tracers to assign ages to seafloor areas. Here we apply
interpolation to fill in any gaps, and we have cropped
ages in continental areas, as they are defined by
Matthews et al. (2016).
Alternative interpolation and cropping schemes are
The python code for the TracTec algorithm is
available on Zenodo. Note that the seafloor ages
in the Zenodo package were developed using the
Matthews et al. (2016)
reconstruction but without the updated tectonic for the Pacific based
on Torsvik et al. (2019). The age grids supplied below do
include this update.
Available for Download:
Citation for the seafloor age grids:
Citation for the seafloor age grid reconstruction method (TracTec code):
- Karlsen, K.S., C.P. Conrad, M. Domeier, and R.G. Trønnes (2021), Spatiotemporal variations in surface heat flux imply a heterogeneous mantle cooling history,
Geophysical Research Letters, 48, e2020GL092119, doi:10.1029/2020GL092119.
Citations for the underlying tectonic model:
- Matthews, K. J., K. T. Maloney, S. Zahirovic, S. E. Williams, M. Seton, and R. D. Müller (2016), Global plate boundary evolution and kinematics since the late Paleozoic, Global and Planetary Change, 146(Supplement C), 226-250, doi:10.1016/j.gloplacha.2016.10.002.
- Torsvik, T.H., B. Steinberger, G.E. Shephard, P.V. Doubrovine, C. Gaina, M Domeier, C.P. Conrad, and W.W. Sager
(2019) Pacific-Panthalassic reconstructions: Overview, errata and the way forward,
Geochemistry, Geophysics, Geosystems, 20, 3659-3689, doi:10.1029/2019GC008402.
Supplemental Files: [PACIFIC.ZIP]