New Zealand gravity reference stations 2020: history and development of the gravity network

The integrated history of repeated caldera formation and infill at the Okataina Volcanic Centre: Insights from 3D gravity and magnetic models

“…They also proposed the magnetic low associated with Puhipuhi basin represents a separate but cooing geothermal system with implications for possible epithermal mineralisation. Seebeck et al (2010) added to the work of Rogan (1982) through collecting a new gravity dataset tied to the New Zealand Primary Gravity Network (Stagpoole et al, 2021). They created several 2.5 D gravity model profiles through the caldera using a two-layer density structure above the basement.…”

“…Building on the compilation of Stagpoole et al (2020) we collected 200 additional high precision measurements in the Okataina Volcanic Centre (Fig. 3D), tied to the national absolute gravity network Stagpoole et al (2021). Our new data are positioned using DGPS with a vertical Fig.…”

“…Eötvös correction was calculated using the real-time kinematics from the DGPS system and the free-air anomaly was obtained using the lake level elevation. The lake data were not tied to the New Zealand reference gravity station database (Stagpoole et al, 2021). To incorporate the lake data into the main terrestrial dataset we created leveling grids across each lake, based on a 1st order polynomial interpolation of the gravity data from terrestrial stations around the lake.…”