New Zealand Region Gravity Grids
Database
These are 1 arc-minute Bouguer, Faye, free air and topography corrected gravity anomaly grids for the New Zealand region. The grids were compiled from existing terrestrial, marine and satellite altimetry-derived gravity data enhanced with new airborne gravimetry data that were acquired for improvement of the New Zealand vertical datum.
This is part of the Nationally Significant New Zealand Volcano Database.
Overview
These files contain gravity anomaly grids for New Zealand region between 25°S to 60°S and 160°E to 170°W. The grids were initially developed for quasigeoid modelling over New Zealand, but have been adapted to be used for more general geophysical research including investigating crustal structure, faults, sedimentary basin and volcanic bodies. Interpretation of the grids can help identify areas where higher resolution gravity data might be of interest for local geological investigations and mineral exploration.
Gravity grids are in Arc-ascii format:
- Bouguer gravity
- FreeAir gravity
- Topo corrected gravity
- Topo corrected Error
To access these data, please "purchase" (for free!) the NEW ZEALAND REGION GRAVITY GRIDS item from the GNS Science Online Shop.
For more information on how data were gathered and compiled, please see the associated publication - Gravity anomaly grids for the New Zealand region, McCubbine et al. (2014)(external link)
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Terms of Use
See download for details.
Cite as: J. C. McCubbine, V. Stagpoole, F. Caratori Tontini, M. Amos, E. Smith & R. Winefield (2017) Gravity anomaly grids for the New Zealand region, New Zealand Journal of Geology and Geophysics, 60:4, 381-391, DOI: 10.1080/00288306.2017.1346692
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Locations
- Whakatū / Nelson
- Rangitāhua / Kermadec Islands
- Rēkohu / Chatham Islands
- Rakiura / Stewart Island
- Murihiku / Southland
- Ōtepoti / Dunedin
- Ōtākou / Otago
- Ōtautahi / Christchurch
- Waitaha / Canterbury
- Kaikōura
- Te Tai Poutini / West Coast
- Te Tauihu-o-te-waka/ Marlborough
- Aotearoa / New Zealand
- Te Tai-o-Aorere / Tasman
- Te Whanga-nui-a-Tara / Wellington
- Manawatū-Whanganui
- Central Plateau
- Taranaki
- Te Matau-a-Māui / Hawke's Bay
- Te Tai Rāwhiti / Gisborne
- Te Moana-a-Toi / Bay of Plenty
- Waikato
- Tāmaki Makaurau / Auckland
- Te Tai Tokerau / Northland