 | | Journal (article/letter/editorial) | | GEOLOGISTS 1987 NO. 5 The RotokawaGeothermalSystem,New Zealand:An Active Epithermal Gold-DepositingEnvironment...Scientificand Industrial Research,PrivateBag,Petone,New Zealand Abstract The Rotokawageothermalsystemis lessthan...underlyingMesoziocgraywackebasementin the Taupo volcaniczone, a region dominatedby extensionaltectonics.At...060 yrs ago and is presently occupiedby an acid lake (LakeRotokawa)with a pH • 2. Significantbeddedsulfurdeposits...Significantbeddedsulfurdeposits which formed in an earlier crater lake existbeneaththe presentlake. The deep fluidsare |  | | Report (issue) | | NEW ZEALAND DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH NEW ZEALAND GEOLOGICAL SURVEY 125th ANNIVERSARY...1865 -1990 NEW ZEALAND GEOLOGICAL SURVEY BULLETIN 104 ISSN 0077-9628 Minerals of New Zealand by G. L....initials should be G.T., not G.L. Lower Hutt, New Zealand 1990 I I Beach sand, alluvium, • terrace...Figure 1. Simplified geological sketch-map of New Zealand. 0 20 40 60 80 100 KM l INTRODUCTION It...Morgan's "Minerals and Mineral Substances of New Zealand" was published, as NZ. Geological Survey bulletin |  | | Journal (article/letter/editorial) | | 95-108 Gold-SilverOre-GradePrecipitates from New Zealand Thermal Waters B. G. WEISSBERG Abstract Gold-silverore...areas along the easternmargin of the Taupo Volcanic Zone, New Zealand. They occur as red-orange amorphoussulfideswith...106 kg/hr, Wairakei system,1951) combinedwith long lifetimes (e.g., 5 X .105yr, Wairakei) are adequateto...hydrothermalalterationprod- and Whakarewarewa,New Zealand (2 ppm Au and uctsfoundin manyepithermal ore...area is exceptionalin and the Hauraki Peninsula,New Zealand) are similar havingas muchas 6% Ag in the scaleoccurringas |  | | Journal (article/letter/editorial) | | and Industrial Research, Private Bag, Petone, New Zealand (Received June 9, 1988; accepted in revised...Au(I) by pyrite, pyrrhotite, sphalerite, galena. In New Zealand a number of active geothermal systems are...than 0.1 ttg k8 -t, WEISSaERG (1969). The active Rotokawa geothermal system has deposited approximately...formation of geochemical anomalies in stream and lake sediments and soils (JENNY, 1968; HEM, 1976; HOHL...o t adsorbed by pyrite, pyrrhotite, sphalerite, galena or chalcopyrite and this inertness was attributed |  | | Book | | Originally published by Springer-Verlag Berlin Heidelberg New York in 1990. The use of registered names, trademarks...which speculation is idle, but within which useful new insights regarding the relationship of certain ores...application of plate tectonic concepts can pinpoint new metal deposits. The main tool available to the exploration...more limited utility in terms of the search for new mineral districts. The problem of the geographic...Panguna Porphyry Copper Deposit, Bougainville, Papua New Guinea ......... . Genetic Models for Porphyry Copper |  | | Book (edition) | | have incorporated into Chapter 1. Apart from the new material discussed above I have included a description...and epithermal gold mineralization and introduced new material into most chapters of this book. This work...places as far apart as France, California, Japan, New Zealand and Spain and the offers to translate it into...Some chapters have been considerably expanded and new sections added; in particular on disseminated gold...perennial complaint of industrial employers, that the new graduate has little or no commercial awareness, such |
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