23 February, 2021

A global dataset of present-day oceanic crustal age and seafloor spreading parameters

References

Seton, M., Müller, R. D., Zahirovic, S., Williams, S., Wright, N., Cannon, J., Whittaker, J., Matthews, K., McGirr, R., (2020), A global dataset of present-day oceanic crustal age and seafloor spreading parameters, Geochemistry, Geophysics, Geosystems, doi: 10.1029/2020GC009214 

and

Müller, R. D., Zahirovic, S., Williams, S. E., Cannon, J., Seton, M., Bower, D. J., ... & Russell, S. H. (2019). A global plate model including lithospheric deformation along major rifts and orogens since the Triassic. Tectonics, 38(6), 1884-1907.	


### Version 2020.1 ###


This folder contains the following files:

Global_410-0Ma_Rotations_2019_v3_${timescale}.rot - This file contains the rotation model that is consistent with the present day age grid.
Global_EarthByte_${timescale}_Isochrons_2019_v3.gpml - This file contains the seafloor spreading isochrons.
Global_EarthByte_${timescale}_IsoCOB_2019_v3.gpml - This file contains the continent-ocean boundaries as line segments.
Global_EarthByte_${timescale}_Ridges_2019_v3.gpml - This file contains present and extinct mid-ocean ridges.
Global_EarthByte_${timescale}_COB_Terranes_2019_v3.gpml - This file contains the polygons needed to make the masking polygon.


Timescale is either Geek and Kent (2007) or GTS2012.
		        
The folder also contains a folder called PreferredMagPicks. This contains a subset of magnetic picks (our preferred picks that are used for misfit analysis) from the GSFML data repository associated with the following paper:

Seton, M., J. Whittaker, P. Wessel, R. D. Müller, C. DeMets, S. Merkouriev, S. Cande, C. Gaina, G. Eagles, R. Granot, J. Stock, N. Wright, S. Williams, 2014, Community infrastructure and repository for marine magnetic identifications, Geochemistry, Geophysics, Geosystems, 5(4), 1629-1641, DOI lookup DOI:10.1002/2013GC005176


30 June, 2022:
The following minor updates have been made to the PreferredMagPicks:
    - Assigned plate IDs to the Pacific and Marginal_BackarcBasin magnetic picks, based on Müller et al. 2019.
	- Included the *.gplates.xml files, for easier import into GPlates.
	- Fixed typo in Pacific filename, which caused an issue when importing into GPlates.
    - Renamed files to be more consistent.
No changes to the magnetic picks themselves have been made.


Contribute:		We welcome contributions. If you would like your work to be included in the next version of the age grid, please send us an email.

Email:			Maria Seton maria.seton@sydney.edu.au	
			Dietmar Muller dietmar.muller@sydney.edu.au
			Sabin Zahirovic sabin.zahirovic@sydney.edu.au