Description of Resources - Matthews et al. (2011)

This file provides a detailed description of all of the files that make up the data collection associated with the publication: Matthews, K. J., Müller, R. D., Wessel, P., & Whittaker, J. M. (2011). The tectonic fabric of the ocean basins. Journal of Geophysical Research, 116(B12), B12109. doi:10.1029/2011JB008413
 
Note: For information on file formats and what programs to use to interact with various file formats, see "File_Formats_and_Recommended_Programs.txt”.


This dataset contains hand-digitised traces of fracture zones, discordant zones, V-shaped structures, unclassified V-anomalies, pseudofaults and extinct ridges. Features were digitised in Google Earth from Sandwell and Smith's (2009) v16.1 vertical gravity gradient data. Apart from the Bay of Biscay ridge and the Sonne ridge in the Cuvier Abyssal Plain, all features were traced along their vertical gravity gradient minima. 

The dataset is also stored in a database hosted by The Global Seafloor Fabric and Magnetic Lineation Data Base Project website: www.soest.hawaii.edu/PT/GSFML/


Please note that this data set has been updated since the publication of Matthews et al. (2011), below are the updates:
[February 2014]
- Cookiecut files* are now partitioned using the static polygons associated with the global plate reconstruction of Seton et al. (2012).
- The features produced by ridge propagation have now been separated into a Pseudofaults file and the Extinct Ridges file (a single file containing both features produced by propagating ridges is also still available - Propagating Ridges).
*Cookie cut features have been assigned reconstruction plate IDs and can be reconstructed when loaded into GPlates with a rotation model (such as that which is freely downloadable with the GPlates software - http://www.gplates.org/). See "File_Formats_and_Recommended_Programs.txt” for more information.

[May 2015]
- The fracture zones data set has been updated using the vertical gravity gradient grids of Sandwell et al. (2014). Updates include the addition of new fracture zones and the modification of exisiting ones. The latest revision is also discussed in the publication Wessel et al. (submitted).


References:
- Sandwell, D. T. and W. H. F. Smith (2009). Global marine gravity from retracked Geosat and ERS-1 altimetry: Ridge segmentation versus spreading rate. Journal of Geophysical Research 114(B1): B01411.
- Sandwell, D. T., Müller, R. D., Smith, W. H., Garcia, E., & Francis, R. (2014). New global marine gravity model from CryoSat-2 and Jason-1 reveals buried tectonic structure. Science, 346(6205), 65-67.
- Seton, M., R. D. Müller, S. Zahirovic, C. Gaina, T. Torsvik, G. Shephard, A. Talsma, M. Gurnis, M. Turner and S. Maus (2012). Global continental and ocean basin reconstructions since 200 Ma. Earth-Science Reviews 113(3): 212-270.
- Wessel, P., K. J. Matthews, R. D. Müller, A. Mazzoni, J. M. Whittaker, R. Myhill, and M. T. Chandler (submitted). The Global Seafloor Fabric and Magnetic Lineation Project. Geochemistry, Geophysics, Geosystems.


The files that make up the tectonic reconstruction model include:
•	Table 1 from Matthews et al. (2011) - This table is taken directly from the publications and provides a full explanation of the dataset classification scheme.
	*	Table1_Matthews_etal.pdf (82 KB)
•	Discordant zones
	*	Discordant_zones.gpml (1.6 MB)
	*	Discordant_zones_cookiecut.gpml (3.9 MB) 
	*	Discordant_zones.kml (193 KB)
	*	Discordant_zones.txt (95 KB)
	*	Discordant_zones.shp (164 KB inc. auxiliary files, datum-WGS 1984)
•	Fracture zones 
	*	Fracture_zones.gpml (6.5 MB)
	*	Fracture_zones_cookiecut.gpml (22.3 MB) 
	*	Fracture_zones.kml (721 KB)
	*	Fracture_zones.txt (299 KB)
	*	Fracture_zones.shp (614 KB inc. auxiliary files, datum-WGS 1984)
•	Pseudofaults
	*	Pseudofaults.gpml (61 KB)
	*	Pseudofaults_cookiecut.gpml (74 KB) 
	*	Pseudofaults.kml (8 KB)
	*	Pseudofaults.txt (4 KB)
	*	Pseudofaults.shp (16 KB inc. auxiliary files, datum-WGS 1984)	
•	Unclassified V-anomalies
	*	Unclassified_V-anomalies.gpml (360 KB)
	*	Unclassified_V-anomalies_cookiecut.gpml (647 KB) 
	*	Unclassified_V-anomalies.kml (33 KB)
	*	Unclassified_V-anomalies.txt (12 KB)
	*	Unclassified_V-anomalies.shp (40 KB inc. auxiliary files, datum-WGS 1984)	
•	V-shaped structures
	*	V-shaped_structures.gpml (33 KB)
	*	V-shaped_structures_cookiecut.gpml (74 KB) 
	*	V-shaped_structures.kml (6 KB)
	*	V-shaped_structures.txt (4 KB)
	*	V-shaped_structures.shp (16 KB inc. auxiliary files, datum-WGS 1984)		
•	Extinct ridges - This file contains different "types" of extinct ridges, both those produced as a result of ridge propagation (as described in Table 1), but also those that form as a result of spreading cessation and ridge jumps.
	*	Extinct_ridges.gpml (217 KB)
	*	Extinct_ridges_cookiecut.gpml (745 KB) 
	*	Extinct_ridges.kml (37 KB)
	*	Extinct_ridges.txt (20 KB)
	*	Extinct_ridges.shp (32 KB inc. auxiliary files, datum-WGS 1984)	
•	Propagating ridges -  Propagating ridges are associated with the formation of pairs of pseudofaults and extinct ridges (see Table 1), these traces are contained in separate files (Pseudofaults and Extinct Ridges). Additionally, these traces are stored together here.
	*	Propagating_ridges.gpml (102 KB)
	*	Propagating_ridges_cookiecut.gpml (143 KB) 
	*	Propagating_ridges.kml (12 KB)
	*	Propagating_ridges.txt (4 KB)
	*	Propagating_ridges.shp (20 KB inc. auxiliary files, datum-WGS 1984)