摘要:

Geophysical methods were used to investigate the possibility of exploiting the Onepu hydrothermal resources in the Kawerau papermills. Changes in the hydrology and chemistry of the hot springs in the last fifty years are attributed to downcutting by the Tarawera River into a Recent alluvial fan; surface runoff has given place to seepage and alkaline waters have given place to acid. Electrical surveying extended the known hot-water zone across the Tarawera River, where test holes gave satisfactory steam and water discharges, and exploitation followed. The naturaf heat flow was estimated at about 25,000 k.cal. per sec. (above 12° C), but the potential output of eight drillholes at 100lb per sq. in. pressure is 2.7 times this figure. High enthalpy discharges and enthalpies which rise with the wellhead pressure may result from tapping the margin of the hot-water zone.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423179

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

Shell beds exposed at the surface and others drilled at depths down to 200 ft below sea-level are of the same age and facies as the Otahuhu shell bed. There is no evidence for deformation of these Pliocene sediments.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423180

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

New graptolite collections from Cape Providence, north of the section described by Benson and Keble in 1935, show a repetition, in reverse order, of the beds known to the south, on the gently-dipping northern limb of an assyrnmetrical east-west-trending anticline. Zones La 2β, La 3, Be 1, and Ch 2 were recognised. The Upper Lancefieldian Zone (La 3), not previously recognised, in New Zealand, in represented by poorly preserved graptolites, includingTetraqraptus approxinuitus, T. acclinans, T. decipiens,andSchisoqraptus waddickorumn.sp. (related to the Lower Bendigonian S. spectabilis of Victoria); no specimens ofT. fruticosuswere identified.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423181

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

Two methods are suggested for linking the active transcurrent faults in the North Island and the South Island across Cook Strait. One uses the average lateral displacements along the faults, the other the location of epicentres, Both methods give the same fault pattern.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423182

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

Piercement structures, local unconformities, and secondary sedimentary basins observed in the Eastern Geosyncline are often closely associated with transcurrent fault-zones. Spasmodic and uneven transcurrent movement along these faultzones is thought to be responsible for the features. Their probable development is shown diagrammatically.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423183

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

The Atiamuri hydro-electric power-station is founded on the summit of a dome of vertically banded Patetere Rhyolite buried beneath rhyolitic pumice breccias and fluviatile sands and gravels. Hydrothermal solutions silicified part of the rhyolite and altered and silicified portions of the pumice breccias near the dam site.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423184

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

The ratio of the horizontal and vertical components of displacement along a fault can be used to determine the character of the faults, and the direction of the Principal Horizontal Stress. The technique is applied to field examples.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423185

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

Posthole boring of dune sands on Nine Mile Beach, south of Cape Foulwind, Westport, shows that the surface sand to a depth of 20 ft contains an average of 5.50% of magnetically recoverable ilmenite.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423186

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

摘要:

The Ngauruhoe lava erupted in 1954 is an olivine-bearing basaltic andesite, and belongs to the Taupo volcanic association of basalts, basaltic andesites, pyroxene andesites, dacites, rhyolites, and ignimbrites. This association, as indicated by a variation diagram, is divided into three distinct series: (a) a main basic series, displaying continuous variation from basalts to dacites; (b) a continuous acid series of rhyolites and ignimbrites; and (c) an accumulative series of basalts and basaltic andesites.

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423187

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor

ISSN:0028-8306    

DOI:10.1080/00288306.1958.10423188

出版商:Taylor & Francis Group    

年代:1958

数据来源: Taylor