 | | Report (issue) | | The steel industry, now being established at Waikato Heads, 30 miles south of Auckland, will use a raw...MINERALS AND ROCKS 1966 INFORMATION SERIES-No.63 NEW ZEALAND DEPARTMENT OF SCIENTIFIC AND INDUSTRIAL RESEARCH...R. E. Owen, Government Printer, Wellington, New Zealand—1967 —— FOREWORD One of the problems associated...reason of their impact on the development of New Zealand natural resources. With the establishment of...results readily available to a wide and perhaps new audience has become very rapidly apparent. I The |  | | Journal (article/letter/editorial) | | geothermal power plant in New Zealand are composed of noncrystalline opal-A that deposited rapidly from...bands were originally composed of noncrystalline opal-A that subsequently recrystallized to quartz. The...low-sulfidation epithermal deposits. Keywords: silica sinter; opal-A; recrystallization; colloform quartz; epithermal...formed at the Wairakei geothermal power plant in New Zealand using a combination of optical microscopy and...noncrystalline silica sinter is composed of high-porosity opal-A laminae formed by filamentous microbes and alternating |  | | Journal (article/letter/editorial) | | particularly IS epithermal orebodies in any particular district, irrespective of whether or not paleosurface features...condensate Opal/chalcedony, alunite, kaolinite, smectite H2S-bearing steam condensate Opal/chalcedony...Opal/chalcedony H2S-bearing steam and SO2- Opal, cristobalite and HCl-bearing magmatic condensates Neutral-pH chloride...Neutral-pH chloride water Opal/chalcedony Calcite, aragonite Opal/chalcedony Opal/chalcedony Taken from...neutral-pH, alkali chloride waters along streams and on lake margins and bottoms, although shallow boiling also |  | | Journal (article/letter/editorial) | | Collector's View of NEW ZEALAND MARK C. B L A Z E K New Mexico Tech Socorro, New Mexico 87801 Introduction...would you ex pect to find in a country like New Zealand? Dia monds, rubies, emeralds, and opals? Perhaps...associate that everelusive mineral, gold, with New Zealand. The point is simply this: the average American...general location and variety of minerals found in New Zealand. It is not intended to be detailed and exhaustive...geology of other countries. When I read of a New Zealand rockhound who wanted to corres pond with an |  | | Journal (article/letter/editorial) | | Whakarewarewa geothermal area, North Island, New Zealand Brian Jones a,⁎, Robin W. Renaut b, R. Bernhart...M.R. Bennett Keywords: Geyser Waikite Opal-A sinter New Zealand a b s t r a c t Waikite, a geyser located...Whakarewarewa geothermal area on the North Island, New Zealand, has a history of eruptive–dormancy cycles that...discharge apron is dictated by the precipitation of opal-A, which is controlled by factors such as discharge...increasingly unstable surfaces resulting from subsurface opal-A dissolution, (6) fractures, from which steam and |  | | Journal (article/letter/editorial) | | JANUARY-FEBRUARY,1953 ROCK ALTERATION NEW A. NO. 1 AT WAIRAKEI, ZEALAND. STEINER. CONTENTS. PAGE Abstract...temperatureand chemicalenvironment: Formation of kaolinitc, opal, and alunite .............................. Formation...milesin a north-north-easterly directionfrom Lake Taupo. 2 •1. STEINER. Thegeology ofthisregion wasdescribed...secondary mineralsconsisting of kaolinite,alunite,and opal. In the first 12 feet in depththis drill holepenetrated...quartzare alteredto clay,someglassremains. unaltered. Opal persiststo a depthof 20 feet. From 20 to 70 feet |  | | 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) | | University of Auckland, Private Bag, 92019, Auckland, New Zealand Abstract The Broadlands-Ohaaki geothermal system...mineral zonation, which is the focus of this paper. New data are presented on the occurrence and abundance...side of the Taupo Volcanic Zone, is 1 of about 20 known hydrothermal systems in the region (Fig. 1). These...been drilled (Fig. 1). The A B M7 White Island Taupo Volcanic Zone 12 ikat Wa 5 24 34(M2,4) BROADLANDS/...system is located in the Taupo Volcanic Zone of the North Island, New Zealand. Widespread volcanism and |  | Canet, Carles, Prol-Ledesma, Rosa María, Proenza, Joaquín Antonio, Rubio-Ramos, Marco Antonio, Forrest, Matthew J., Torres-Vera, Marco Antonio, Rodríguez-Díaz, Augusto Antonio (2005) Mn–Ba–Hg mineralization at shallow submarine hydrothermal vents in Bahía Concepción, Baja California Sur, Mexico. Chemical Geology, 224 (1) 96-112 doi:10.1016/j.chemgeo.2005.07.023 | Journal (article/letter/editorial) | | and structureless detrital aggregates cemented by opal-A, barite and calcite occur around the main discharge...rhyolitic caldera of Taupo, New Zealand (de Ronde et al., 2002), and the Crater Lake, Oregon (Dymond et...of detrital and bioclastic fragments cemented by opal with minor amounts of calcite and barite, (2) moss-like... 4). These stromatolites coat the structureless opal cemented aggregates and the Mn-oxide crusts, and...vents. Cc, stromatolitic calcite-silica crusts; Si, opal-cemented aggregates; Mn, manganese oxide crust. |  | Álvaro, Jose Javier, Sánchez-Román, Mónica, Nierop, Klaas G.J., Peterse, Francien (2021) Multiscale Microbial Preservation and Biogeochemical Signals in a Modern Hot-Spring Siliceous Sinter Rich in CO2 Emissions, Krýsuvík Geothermal Field, Iceland. Minerals, 11 (3) 263 doi:10.3390/min11030263 | Journal (article/letter/editorial) | | individual microbial filaments, whereas coalescence of opal spheres into agglomerates precludes recognition...emanating vapors; shelf is about 3 m wide. Amorphous opal-A (SiO2 ·nH2 O) is the dominant component of the...crystalline forms, such as opaline silica polymorphs opal-C and opal-CT, and quartz [49–56]. However, the preservation...elements (including mineral type, organization of opal clusters, and microbial laminae and textures) that...rod-shaped and coccoid-dominated clusters and isolated opal-A spheres, with subsidiary filaments, arranged subparallel |  | Chambefort, I., Lewis, B., Simpson, M. P., Bignall, G., Rae, A. J., Ganefianto, N. (2017) Ngatamariki Geothermal System: Magmatic to Epithermal Transition in the Taupo Volcanic Zone, New Zealand. Economic Geology, 112 (2) 319-346 doi:10.2113/econgeo.112.2.319 | Journal (article/letter/editorial) | | Magmatic to Epithermal Transition in the Taupo Volcanic Zone, New Zealand I. Chambefort,1,† B. Lewis,1 M. P...2000, Taupo 3352, New Zealand 2 Mighty River Power Limited, PO Box 245, Rotorua 3040, New Zealand Abstract...(>225°C) geothermal systems in the Taupo Volcanic Zone, North Island, New Zealand. At shallow levels (<2 km)...hydrothermal alteration found nowhere else in the Taupo Volcanic Zone. Two separate phases of hydrothermal...Geothermal systems such as those of the Taupo Volcanic Zone, New Zealand, are responsible for the transfer |  | | Journal (article/letter/editorial) | | PACMANUS Hydrothermal Field, Manus Basin, Papua New Guinea R. A. Binns† Commonwealth Scientific and Industrial...dominated by 5- to 10-mm-thick primary laminae of opal-A-dominated fronds clouded by submicroscopic sphalerite...modified by dissolution and then redeposition of opal and further growth of pyrite and sphalerite. Beneath...sphalerite-barite carapace ~5 cm thick and devoid of opal is banded parallel to the chimney exterior. At least...microbial mat precursors by overgrowth of hydrothermal opal and fine sphalerite. Next, with rising fluid temperatures |  | Djokic, Tara, Van Kranendonk, Martin J., Campbell, Kathleen A., Havig, Jeff R., Walter, Malcolm R., Guido, Diego M. (2021) A Reconstructed Subaerial Hot Spring Field in the ∼3.5 Billion-Year-Old Dresser Formation, North Pole Dome, Pilbara Craton, Western Australia. Astrobiology, 21 (1) 1-38 doi:10.1089/ast.2019.2072 | Journal (article/letter/editorial) | | overlies a hydrothermally influenced volcanic caldera lake facies, with shoreline stromatolites. Hot spring...facies that are characteristic of those from New Zealand, Yellowstone National Park, USA, and Argentina...Environmental Sciences, University of New South Wales, Kensington, New South Wales, Australia. 2 Australian...Questions Institute, University of New South Wales Australia, Kensington, New South Wales, Australia. 4 Pheasant...Ao Marama, University of Auckland, Auckland, New Zealand. 6 Department of Earth Sciences, University of |  | | Book | | Structures of High-Purity Quartz from the Southern Ural Region, Russia Reprinted from: Minerals 2017, 7, 189,...specifics of SiO2 modifications and varieties (e.g., opal, chalcedony, agate, quartz, amethyst). Following...However, modern analytical methods brought a lot of new mineralogical and geochemical data concerning the...methods is illustrated by two contributions providing new data concerning thermogravimetry-massspectrometry...seifertite, high-pressure silica glass, moganite or opal, are relatively rare in extraterrestrial materials |  | | Book | | Structures of High-Purity Quartz from the Southern Ural Region, Russia Reprinted from: Minerals 2017, 7, 189,...specifics of SiO2 modifications and varieties (e.g., opal, chalcedony, agate, quartz, amethyst). Following...However, modern analytical methods brought a lot of new mineralogical and geochemical data concerning the...methods is illustrated by two contributions providing new data concerning thermogravimetry-massspectrometry...seifertite, high-pressure silica glass, moganite or opal, are relatively rare in extraterrestrial materials |  | | Book | | Edited by R. E. TAYLOR NOYES PRESS PARli. RIDGE, NEW JEllSEY Copyright © 1976 by R. E. Taylor Library...States by NOYES PRESS Noyes Building Park R idge, New Jersey 07656 Library o f Congress Cataloging in...Eastern Hemisphere 14. Characterization Studies of New Zealand Obsidians: Toward a Regional Prehistory .......obsidian include the circum-Pacific rim area of New Zealand, Australia, Japan, North America, Mesoamerica...recording was in limited use in the Gulf Coast or Olmec region of Mesoamerica (ancient Mexico) sometime early |  | | Journal (article/letter/editorial) | | diameter, and are common deposits in Yellowstone Lake. Domal mounds are characterized by siliceous precipitates...springs that precipitate amorphous hydrated silica (opal-A) are the most abundant in Yellowstone (Fournier...historical record of hydrothermal activity in the region. A wealth of information is contained in these...Although once largely regarded as abiotic precipitates, opal precipitated in hot springs is now recognized as...overcoming the affects of kinetic inhibitors for opal precipitation (Birnbaum and Wireman, 1984; Birnbaum |  | | Book | | Series editor Karoly Nemeth, Palmerston North, New Zealand Editor-in-Chief IAVCEI, Barcelona, Spain For...Italy Bruce Christenson GNS Science Lower Hutt New Zealand Franco Tassi Earth Sciences University of Florence...Congress Control Number: 2014957163 Springer Heidelberg New York Dordrecht London © Springer-Verlag Berlin Heidelberg...evaporation, seepage and spillover). Changes in lake temperature or chemistry often, though not always...indicate changes in magma degassing; changes in lake level can indicate strain of the edifice; and bubbling |  | Peng, Xiaotong, Chen, Shun, Zhou, Huaiyang, Zhang, Lixue, Wu, Zijun, Li, Jiangtao, Li, Jiwei, Xu, Hengchao (2011) Diversity of biogenic minerals in low-temperature Si-rich deposits from a newly discovered hydrothermal field on the ultraslow spreading Southwest Indian Ridge. Journal of Geophysical Research, 116. doi:10.1029/2011jg001691 | Journal (article/letter/editorial) | | Fe‐oxide structures are found and attributed to new types of biogenic minerals. The precipitation of...spreading Southwest Indian Ridge (SWIR) in 2007, a new hydrothermal field was discovered with the aid of...been discovered on this ridge. This site offers new and exciting prospects for expanding the known ranges...that the regional density structure of the axial region varies from a colder mantle beneath the deepest...deposits, based on XRD analyses, was dominated by opal‐A, pyrite, and marcasite (Figure 3). Marcasite and |  | | Journal (article/letter/editorial) | | SPRINGS AT LAKE ROTOMAHANA, NEW ZEALAND. THE formation of the province of Auckland, New Zea land, is...place in which the springs are to be found is Lake Taupo, where baths have been erected, and which in...caldron of Orua Whata to the tepid springs of the lake shore; from the cold, sul- THE COLI}- SPRINGS ...are to be seen in their greatest grandeur is at Lake Rotomahana, where the silicious depOSits from the...nearly snow- white rock. On the opposite side of the lake is a terrace of pink or sal mon color, and all |  | | Catalog/List | | NORTH LAKE PARK BOTTINEAU, NORTH DAKOTA 56318 (701)263-4948 E-Mail: ppeddler@metigoshe.ndak.net NEW YEAR...YEAR, NEW ITEMS, SAME LOW PRICES! 1997 CATALOG #1 Hello again and happy new year! We sincerely wish all...catalog should have something for everyone! Over 250 new and exciting items to choose from! Yup, that's right...again for your patronage and enjoy the catalog! ALL NEW STEMS FOE 1997: PYRITE SUNS IN SHALE MA TRIX: Sparta...00 each. SULFUR HOPPER CRYSTALS: Lake Taupo, North Island, New Zealand: Showy small thumbnail hoppered |  | | Report (issue) | | water chemistry has been increasing in recent years, new lmowledge of the field would soon make such a discussion...exposure to evaporation and of return as .humid region, and the rocks are highly resistant to underflow...GEOCHE~STRY waters at Sulphur Bank, Calif., and Ngawha, New an earlier analysis. from the nearby Quincy mine...high in bicarbonate. from serpentine replaced by opal containing veinlets of OTHER NONTHERMAL ACID MINERAL...concentration of minor elements in the brines of Searles Lake suggests that the brines are probably connate nonmarine |  | | Report (issue) | | from Battleship Rock, Jemez Springs quadrangle, New Mexico__________________________________________________...Photomicrograph of glassy ash -flow tuff from Arequipa region, Peru. showing; wide range in the size of the shards...Photomicrograph of glassy welded tuff from Arequipa region, Peru, showing lack of characteristic shard forms...Photomicrograph of glassy welded tuff from Lake Toba region, North Sumatra, with compressed shards molded...tomicrograph of glassy ash-flow tuff from Lake Toba region, North Sumatra, with only slight welding and |  | | Book | | appointments at the Astrobiology Centre, University of New South Wales, Sydney, and the China University of...in Europe, southern Africa, South East Asia, New Zealand, the southwest Pacific, China, Greenland and... Contents 4.6.5 Candelaria, Punta Del Cobre District, Chilean Coastal Belt. . . . . . . . . . . . ...2 Ladolam Epithermal System, Lihir Island, Papua New Guinea . . . . . . . . . . . . . . . . . . . . ....3.3 Hauraki Goldfield, Coromandel Peninsula, New Zealand 5.3.4 The Epithermal Systems of the Biga Peninsula |  | | Journal (article/letter/editorial) | | et al. Geochemical and mineralogical studies of Lake Specchio di Venere, Pantelleria Island, Italy 40(1-2):...granitic rocks of the Kanigiri area in the Prakasam District, Andhra Pradesh, India 39(3-4): 319-334 0089...deposits of Kumhardubi and Betjharan, Mayurbhanj District, Orissa, India 43(3-4): 257-269 0090 Banno,...in the metamorphosed basic volcanics at Sofala, New South Wales 23(3): 193-213 0109 Bartholome, P....Blattner, P.; Braithwaite, W. R.; and Glover, R. B. New evidence on magnetite oxygen isotope geothermometers |
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Rangatira Point, Lake Taupo, Taupo District, Waikato Region, New Zealand