Supplemental material: Emergent and animated COLLADA models of the Tonga Trench and Samoa Archipelago: Implications for geoscience modeling, education, and research
journal contributionposted on 20.03.2012, 00:00 by Declan G. De Paor, Steve C. Wild, Mladen M. Dordevic
Geosphere, April 2012, v. 8, p. 491-506, doi:10.1130/GES00758.1, Model 5 - In this scenario, the western Pacific plate first cracked along the Tonga Trench and tore at a point to the west of the Samoan Archipelago, causing the southern portion to subduct. A magmatic arc built, but there was no significant backarc spreading. At ~6 m.y. ago the tear point ripped rapidly eastward as in model 3. This rapid rollback resulted in a shallow-dipping slab segment at shallow depth with steep-dipping absolute movement vectors. The flat slab then continued to founder to its present mid-mantle level. This .zip file contains the KML file for Supplemental Model 5. To view the html file of Supplemental Models 1-6 with a Google Chrome, Firefox, or Safari web browser, please visit http://dx.doi.org/10.1130/GES00758.S5. File size is 7 MB.