The New Zealand Primary Gravity Network

Abstract

remained the basis for recording gravity results within New Zealand. Subsequent adjustment of the network, both to make it internally consistent and to bring it into agreement with the first order world network based on Potsdam, has resulted in a revised set of values of gravity, which constitute the New Zealand Potsdam System (1959), and which differ by an average of + 5'0 mgal from the New Zealand Provisional System values. Values of gravity and of free air and Bouguer anomalies are given for the 437 network stations. 1960) ROBERTSON AND REILLY -N.Z. GRAVITY NETWORK 4 " .J Ag = t (A,g + A2g)and a measure of the accuracy of the mean ! A 2g _. A1g I were obtained. Most of these measurements go to form networks of polygons, or closed circuits (figs. 3 and 4), whose sides include two or more stations.

Geophysical characterisation of large silicic volcanic structures in the Coromandel Peninsula, New Zealand

“…The data were tied into the New Zealand Potsdam 1959 system (Robertson & Reilly 1960) by a station on the Precise Gravity Network located at Puriri, between Thames and Paeroa (Fig. 3).…”

Recent geophysical exploration of the Kawerau geothermal field, North Island, New Zealand

“…The regional Bouguer anomaly used is the same as that depicted on fig. 8 of Studt (1958), except 5 mgal has been added to take into account the change of datum from the New Zealand Provisional System to the New Zealand Potsdam System (1959) (Robertson and Reilly 1960). The residual gravity anomaly map thus produced (Fig.…”

Gravity and crustal thickness in New Zealand

“…A representative set of gravity anomalies at 415 stations evenly distributed over the greater part of New Zealand has been given by Robertson and Reilly (1960) …”