A Compilation of a Preliminary Map of Vertical Deformations in New Zealand from Continuous GPS Data

Robert Tenzer, M. Stevenson, P. Denys

Research output: Chapter in book / Conference proceedingConference article published in proceeding or bookAcademic researchpeer-review

3 Citations (Scopus)

Abstract

The NZGD2000 is the official 3-D semi-dynamic geodetic datum for New Zealand that incorporates a deformation model to correct the horizontal coordinates and survey observations for the effect of regional-scale tectonic movements of the Earth's crust. These horizontal tectonic deformations are up to a few centimetres per year. Except for the Southern Alps (central South Island) and the Taupo volcanic zone (North Island), the currently available information indicates that the vertical tectonic deformations are an order of magnitude smaller than the horizontal components. In this study we compile a preliminary map of vertical deformations in New Zealand using the GPS time series. The least-squares linear regression analysis is used to estimate the vertical velocities at GPS sites. After applying outlier detection, the vertical deformations are investigated with respect to the tectonic setup of New Zealand. The results reveal that the uplift of the Southern Alps at the currently established GPS sites reaches 6 mm/year. The largest regional-scale tectonic subsidence, at approximately 9 mm/year, is detected in the lower and central part of the North Island. The estimated vertical tectonic deformations are compared with evidence from geochronological data and results of previous studies.
Original languageEnglish
Title of host publicationGeodesy for Planet Earth - Proceedings of the 2009 IAG Symposium
Pages697-703
Number of pages7
Volume136
DOIs
Publication statusPublished - 1 Dec 2012
Externally publishedYes
EventIAG Symposium on Geodesy for Planet Earth, IAG 2009 - Chania, Crete, Argentina
Duration: 31 Aug 20094 Sep 2009

Conference

ConferenceIAG Symposium on Geodesy for Planet Earth, IAG 2009
CountryArgentina
CityChania, Crete
Period31/08/094/09/09

ASJC Scopus subject areas

  • Computers in Earth Sciences
  • Geophysics

Cite this