Proceedings of the 6th New Zealand Geothermal Workshop 1985. Whakarewarewa thermal activity : yesterday and today. New Zealand Geothermal Workshop [7-9 Nov. 1984, New Zealand].

Donaldson, I.G. Cody, A.D.

[1984]

171
CIENA

0-86869-056-2

A recent re-survey of the thermal features in Whakarewarewa shows that changes in that activity have occurred since the previous scientific survey (by E.F. Lloyd, W.M. Crafar and H.W. Hunter, Geological survey, Rotorua) in 1969. To put these changes into perspective it has, however, been necessary to seek out information about the system and its features well before that first survey. In this paper we briefly discuss the Whakarewarewa system and the changes that have taken place over time. In the first part of the paper we briefly summarise the current ideas relating to the initial development of this thermal system and the reported changes that occurred up to about the time of the Tarawera eruption (in 1886). The changes that occurred in the roughly 100 year period following Tarawera are covered in the second section. During this period, man's activities within Whakarewarewa have almost certainly played a significant role in influencing change and some of these influences and changes are discuss. Many questions still remain..

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NUEVA ZELANDIA; ENERGIA GEOTERMICA; CAMPOS GEOTERMICOS; INVESTIGACION;