Geothermal heat flow in the North Island of New Zealand

Studt, F. E.; Thompson, G. E.

doi:10.1080/00288306.1969.10431105

Cited by 62 publications

(26 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The velocities in region 1 are consistent with a smaller proportion of melt; the proportion might be approximately half the aspect ratio. The high heat How (Studt & Thompson 1969) and low Pn and Sn velocities in that region, however, may be due to high temperatures alone. In regions 5 and 7 there may be significant numbers of open cracks.…”

Section: The South Islandmentioning

confidence: 99%

Seismic wave velocities in the uppermost mantle beneath New Zealand

Haines

1979

New Zealand Journal of Geology and Geophysics

112

View full text Add to dashboard Cite

The extent of lateral inhomogeneity in the uppermost mantle beneath New Zealand has been studied by mapping the variation of Pn and Sn velocities. Ten regions of constant structure were required to model the distribution of velocities, which range from 7·4 km/s and 3' 95 km/s for Pn and Sn respectively, beneath the central North Island, to 8· 7 km/s and 4· 8 krn/s beneath Nelson. It is suggested that the regions partition the uppermost mantle according to whether its constituents are ultramafic or mafic and according to the concentrations of open cracks and melt.

show abstract

Section: The South Islandmentioning

confidence: 99%

Seismic wave velocities in the uppermost mantle beneath New Zealand

Haines

1979

New Zealand Journal of Geology and Geophysics

112

View full text Add to dashboard Cite

show abstract

“…The locations of the holes at which temperature measurements were made are shown in Fig 1. A copper-constantan thermocouple and a potentiometer were used in a similar manner to that reported in Studt & Thompson (1969). Prior to metrication, measurements were made at depth intervals of 20 ft (6'1 m), but more recently a depth interval of 5 metres has been adopted, except for some of the deep drillholes (c. 300 m), where an interval of 10 m was used.…”

Section: Measurementsmentioning

confidence: 99%

“…Studt & Thompson (1969) reported temperature gradients ranging from 148°c/km to OOc/km from measurements in 23 drillholes throughout North Island, New Zealand, many of them specially drilled for a study of heat flow. They suggested that zero and near-zero gradients in the Central Volcanic Region are caused by downflowing recharge water, feeding a widespread convective system.…”

Section: Introductionmentioning

confidence: 99%

Temperature gradients within and adjacent to the North Island volcanic belt

Thompson¹

1977

New Zealand Journal of Geology and Geophysics

Self Cite

View full text Add to dashboard Cite

Temperature gradients have been measured in 44 drillholes within the North Island volcanic belt. New Zealand, and in 4 further holes adjacent to this region. Temperature gradients ranged widely from zero, or slightly negative values to +815°c/km. This variation is attributed to the existence of convective hydrothermal systems within the volcanic belt. Heat flow values for five drillholes for which adequate lithologic data were available ranged from 28 to 113 mW 1m'.

show abstract

“…Studt & Thompson (1969) and Thompson (1977) reported data from measurements in drillholes in the North Island of New Zealand, and the North Island Volcanic Belt", respectively, which show that the temperature gradient varies from negative to many times normal value.…”

Section: Introductionmentioning

confidence: 99%