New Hebrides–Fiji diffuse deformation zone

Classification

region kind

diffuseDeformationZone

domain realm

oceanic

How this is mapped

One published representation of where New Hebrides–Fiji diffuse deformation zone is. Each is one interpretation, by one identified source, at one scale — not the shape of the thing itself.

• Tectonic model geometry

  MultiPolygon · 152 positionspreferred for publication

  Geometry that exists because a model defines it — a rigid-plate outline, a zone where a model declares itself inapplicable. It is a property of the model, and changes when the model is revised. It is present-day geometry from a present-day model; a palaeogeographic reconstruction is a different thing and Lithoen does not hold one.

  The outline of the "New Hebrides-Fiji" orogen in model PB2002 (Bird, 2003). In that model an orogen is a region where the rigid-plate description does not apply because deformation is distributed, so this outline delimits where a MODEL stops working — it is not the extent of a mountain belt and carries no claim about crustal structure, age or thickness. Digitised by by Peter Bird, December 2001.

  Boundary certainty

  DefinedThe boundary is fixed by a definition rather than found in the field — a model boundary, a stated coordinate limit, an administrative extent of a survey. It is exactly where it says it is, because it is a definition.

  Status of this geometry

  modelledThe status of the geometry, which need not match the status of what the entity’s claims assert.

  Dataset

  PB2002 plates, boundaries and orogens as GeoJSON (fraxen/tectonicplates)Plate model PB2002 from Bird (2003), doi:10.1029/2001GC000252; GIS conversion by Hugo Ahlenius, Nordpil, ODC-By 1.0.

  What was done to this geometry

  • By Lithoen — Coordinates rounded to 4 decimal places, about 11 m of longitude at the equator.
  • Before it reached Lithoen — Digitised by Peter Bird for model PB2002; the outlines delimit where the model declares itself inapplicable.
  • Before it reached Lithoen — The GIS conversion (Ahlenius, ODC-By 1.0) split segments spanning the -180/180 meridian and moved them, as its README states.