Late quaternary hydrothermal explosion breccias at Kawerau Geothermal Field, New Zealand

1980 ◽  
Vol 43 (1) ◽  
pp. 1-13 ◽  
Author(s):  
I. A. Nairn ◽  
Solia Wiradiradja
Keyword(s):  
New Zealand ◽  
Late Quaternary ◽  
Geothermal Field ◽  
Hydrothermal Explosion

Late Quaternary paleolimnology of Onepoto maar, Auckland, New Zealand: Implications for the drivers of regional paleoclimate

2012 ◽  
Vol 253 ◽  
pp. 18-31 ◽  
Author(s):  
Paul Augustinus ◽  
Ursula Cochran ◽  
Giri Kattel ◽  
Donna D’Costa ◽  
Phil Shane
Keyword(s):  
New Zealand ◽  
Late Quaternary

Geodetic strain and the deformational history of the North Island of New Zealand during the late Cainozoic

1987 ◽  
Vol 321 (1557) ◽  
pp. 163-181 ◽  
Keyword(s):  
New Zealand ◽  
Subduction Zone ◽  
East Coast ◽  
Late Quaternary ◽  
Plate Boundary ◽  
Boundary Zone ◽  
Metamorphic Belt ◽  
Volcanic Region ◽  
The North ◽  
Plate Boundary Zone

The subduction zone under the east coast of the North Island of New Zealand comprises, from east to west, a frontal wedge, a fore-arc basin, uplifted basement forming the arc and the Central Volcanic Region. Reconstructions of the plate boundary zone for the Cainozoic from seafloor spreading data require the fore-arc basin to have rotated through 60° in the last 20 Ma which is confirmed by palaeomagnetic declination studies. Estimates of shear strain from geodetic data show that the fore-arc basin is rotating today and that it is under extension in the direction normal to the trend of the plate boundary zone. The extension is apparently achieved by normal faulting. Estimates of the amount of sediments accreted to the subduction zone exceed the volume of the frontal wedge: underplating by the excess sediments is suggested to be the cause of late Quaternary uplift of the fore-arc basin. Low-temperature—high-pressure metamorphism may therefore be occurring at depth on the east coast and high-temperature—low-pressure metamorphism is probable in the Central Volcanic Region. The North Island of New Zealand is therefore a likely setting for a paired metamorphic belt in the making.

scholarly journals Matrix permeability of reservoir rocks, Ngatamariki geothermal field, Taupo Volcanic Zone, New Zealand

2018 ◽  
Vol 6 (1) ◽  
Author(s):  
J. L. Cant ◽  
P. A. Siratovich ◽  
J. W. Cole ◽  
M. C. Villeneuve ◽  
B. M. Kennedy
Keyword(s):  
New Zealand ◽  
Geothermal Field ◽  
Taupo Volcanic Zone ◽  
Volcanic Zone ◽  
Reservoir Rocks ◽  
Matrix Permeability

scholarly journals Synoptic climate change as a driver of late Quaternary glaciations in the mid-latitudes of the Southern Hemisphere

2006 ◽  
Vol 2 (1) ◽  
pp. 11-19 ◽  
Author(s):  
H. Rother ◽  
J. Shulmeister
Keyword(s):  
New Zealand ◽  
Southern Hemisphere ◽  
Large Scale ◽  
Late Quaternary ◽  
Synoptic Climatology ◽  
Balance Model ◽  
Last Glacial ◽  
Regional Flow ◽  
Quaternary Glaciations ◽  
The Last Glacial

Abstract. The relative timing of late Quaternary glacial advances in mid-latitude (40-55° S) mountain belts of the Southern Hemisphere (SH) has become a critical focus in the debate on global climate teleconnections. On the basis of glacial data from New Zealand (NZ) and southern South America it has been argued that interhemispheric synchrony or asynchrony of Quaternary glacial events is due to Northern Hemisphere (NH) forcing of SH climate through either the ocean or atmosphere systems. Here we present a glacial snow-mass balance model that demonstrates that large scale glaciation in the temperate and hyperhumid Southern Alps of New Zealand can be generated with moderate cooling. This is because the rapid conversion of precipitation from rainfall to snowfall drives massive ice accumulation at small thermal changes (1-4°C). Our model is consistent with recent paleo-environmental reconstructions showing that glacial advances in New Zealand during the Last Glacial Maximum (LGM) and the Last Glacial Interglacial Transition (LGIT) occurred under very moderate cooling. We suggest that such moderate cooling could be generated by changes in synoptic climatology, specifically through enhanced regional flow of moist westerly air masses. Our results imply that NH climate forcing may not have been the exclusive driver of Quaternary glaciations in New Zealand and that synoptic style climate variations are a better explanation for at least some late Quaternary glacial events, in particular during the LGIT (e.g. Younger Dryas and/or Antarctic Cold Reversal).

Ngatamariki Geothermal Field, New Zealand: Geology, geophysics, chemistry and conceptual model

Geothermics ◽  
2016 ◽  
Vol 59 ◽  
pp. 266-280 ◽  
Author(s):  
Isabelle Chambefort ◽  
Etienne Buscarlet ◽  
Irene C. Wallis ◽  
Steven Sewell ◽  
Maxwell Wilmarth
Keyword(s):  
New Zealand ◽  
Conceptual Model ◽  
Geothermal Field
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