 | Christie, A. B., Simpson, M. P., Brathwaite, R. L., Mauk, J. L., Simmons, S. F. (2007) Epithermal Au-Ag and Related Deposits of the Hauraki Goldfield, Coromandel Volcanic Zone, New Zealand. Economic Geology, 102 (5) 785-816 doi:10.2113/gsecongeo.102.5.785 | Journal (article/letter/editorial) | | Related Deposits of the Hauraki Goldfield, Coromandel Volcanic Zone, New Zealand ANTHONY B. CHRISTIE,ā ...GNS Science, P.O. Box 30-368, Lower Hutt 5040, New Zealand MARK P. SIMPSON, School of Geography, Geology...1142, New Zealand ROBERT L. BRATHWAITE, GNS Science, P.O. Box 30-368, Lower Hutt, New Zealand JEFFREY... Auckland 1142, New Zealand Abstract Epithermal Au-Ag vein deposits of the Hauraki goldfield in the...the Coromandel volcanic zone, New Zealand, produced 320,000 kg Au and 1.5 million kg Ag between 1862 and |  | | Journal (article/letter/editorial) | | Deposits and Prospects of the Waitekauri Area, Hauraki Goldfield, New Zealand MARK P. SIMPSONā AND JEFFREY...Auckland, New Zealand Abstract The Waitekauri area of the Hauraki goldfield, New Zealand, contains several...alteration and vein minerals along a 3-km-long composite cross section through the area. Most host rocks are intensely...et al., 2003; Comstock: Hudson, 2003; Favona, New Zealand: Simpson and Mauk, 2007). Many papers describe...prospects in the Waitekauri area of the southern Hauraki goldfield, North Island, New Zealand (Figs. 1, 2) |  | | Journal (article/letter/editorial) | | Hydrologic Evolution of the Golden Cross Epithermal Au-Ag Deposit, New Zealand MARK P. SIMPSON,ā JEFFREY...University of Auckland, Private Bag 92019, Auckland, New Zealand AND STUART F. SIMMONS Geothermal Institute...Auckland, New Zealand Abstract Golden Cross, located in the Coromandel peninsula, New Zealand, is a classic...temporal zonation around veins, as defined along three cross sections (1,000 m long Ć 450 m deep), located 200...conditions. Veins and alteration minerals at Golden Cross formed in the shallow part (<400 m) of a hydrothermal |  | | Journal (article/letter/editorial) | | of a Large Epithermal Province: The Hauraki Goldfield, New Zealand* JEFFREY L. MAUK,1,ā CHRIS M. HALL...92019, Auckland Mail Centre, Auckland 1142, New Zealand 2 Department of Geological Sciences, University...of Arizona, Tucson, Arizona 85721 Abstract The Hauraki goldfield in the Coromandel volcanic zone contains...47 Ā± 0.06 Ma. The southernmost deposit in the Hauraki goldfield, Muirs Reef, has adularia in quartz veins...these results indicate that mineralization in the Hauraki goldfield ranges from 16.3 Ma in the north to 2 |  | | Journal (article/letter/editorial) | | Au-Ag Deposits: A Case Study from the Waitekauri Area, New Zealand MATHIJS A. BOODEN,ā JEFFREY L. MAUK...92019, Auckland Mail Centre, Auckland 1142, New Zealand Abstract Major element geochemical exploration...alteration can be quantified. In the Hauraki goldfield of New Zealand, altered andesites and dacites host...rocks in the Waitekauri area along a 3-km-wide section that extends from the central Waitekauri fault to...gained in adularia-quartzārich rocks close to the Waitekauri fault. Other major elements are preferentially |  | Simpson, Mark P., Gazley, Michael F., Stuart, Alistair G.J., Pearce, Mark A., Birchall, Renee, Chappell, Debra, Christie, Anthony B., Stevens, Murray R. (2019) Hydrothermal Alteration at the Karangahake Epithermal Au-Ag Deposit, Hauraki Goldfield, New Zealand. Economic Geology, 114 (2) 243-273 doi:10.5382/econgeo.2019.4630 | Journal (article/letter/editorial) | | Karangahake Epithermal Au-Ag Deposit, Hauraki Goldfield, New Zealand Mark P. Simpson,1,ā Michael F. Gazley...Research Centre, 114 Karetoto Road-RD4, Taupo 3377, New Zealand Scientific and Industrial Research Organisation...2013, New Zealand 4 GNS 5 Stevens Science, 1 Fairway Drive, Avalon, Lower Hutt 5010, New Zealand and...Pine Harbour Parade, Beachlands, Auckland 2018, New Zealand Abstract The Karangahake deposit is the third...largest gold producer in the Hauraki goldfield, Coromandel, New Zealand. Production was mainly from the |  | | Journal (article/letter/editorial) | | Favona Epithermal Gold-Silver Deposit, Waihi, New Zealand MARK P. SIMPSONā AND JEFFREY L. MAUK School of...Mail Centre, Auckland 1142, New Zealand Abstract The Favona deposit is a new epithermal vein discovery...>42.1 million oz (Moz) Ag), in the Hauraki goldfield of New Zealand. The concealed Favona vein is hosted...display distinct zonation along four subsurface cross sections (800 m long Ć 450 m deep) that transect...for veins. The veins at Favona, Martha, and Golden Cross (Empire vein), combined with a resource at Karangahake |  | | Journal (article/letter/editorial) | | GoldenCrossEpithermalGold-SilverDeposit,Waihi, New Zealand CORNELE. J. DE RONDE* Geology DepartmentUniversity...NewZealandGeologicalSurā¢etd, P.O. Box$0 $68, Lower Hurt, New Zealand Abstract The GoldenCrossepithermalgold-silverdepositis...the Taupo volcaniczone in the Waihi district,Coromandel Peninsula,New Zealand.Gold andsilverof economicgrades(1-20...previouslybeendescribedfromepithermal depositsin New Zealandandpossiblycontainorganicliquid(s). Oxygenisotopesof...south. Also, the subsurfacesection of Golden Cross THE Golden Crossgold-silver deposit is located in |  | | Journal (article/letter/editorial) | | Composition of Altered Rocks at the Golden Cross Epithermal Au-Ag Deposit, New Zealand JEFFREY L. MAUKā AND MARK...Auckland Mail Centre, Auckland 1142, New Zealand Abstract Golden Cross is a late Miocene volcanic-hosted...assemblages located in the Coromandel peninsula, New Zealand. Gold- and Ag-bearing quartz veins occur in intensely...primary control of whole-rock geochemistry at Golden Cross, as at other volcanic-hosted epithermal deposits...illite assemblages, is the destruction of igneous plagioclase by hydrothermal alteration and K metasomatism |  | | 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, ā¢ 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 |  | Hamilton, Ayrton, Campbell, Kathleen, Rowland, Julie, Browne, Patrick (2017) The Kohuamuri siliceous sinter as a vector for epithermal mineralisation, Coromandel Volcanic Zone, New Zealand. Mineralium Deposita, 52 (2) 181-196 doi:10.1007/s00126-016-0658-8 | Journal (article/letter/editorial) | | epithermal mineralisation, Coromandel Volcanic Zone, New Zealand Ayrton Hamilton 1 & Kathleen Campbell 1 & Julie...largest known fossil hot-spring system in the Hauraki Goldfield, a 200 Ć 40 km volcanic terrain with...3ā5.6 Ma within the Coromandel Volcanic Zone, New Zealand. The sinter is associated with rhyolite and ignimbrite...Auckland, Private Bag 92019, Auckland 1142, New Zealand 2 Institute of Earth Sciences and Engineering...University of Auckland, Private Bag 92019, Auckland, New Zealand deposits contain the high-temperature (>75 Ā°C) |  | | Journal (article/letter/editorial) | | Epithermal Orebody: The Martha Hill Deposit, Waihi, New Zealand K. BERNARD SPĆRLI1,ā AND HUGH CARGILL2 1 Geology...92019, Auckland 1142, New Zealand 2 28 Norwich Avenue, New Plymouth 4310, New Zealand Abstract We describe...The world-class Martha Hill mine in the Hauraki goldfield of New Zealand (Figs. 1, 2), with a total mined...state of structural information in the Martha Hill mine up to 1994, as presented by Cargill (1994), and...style towards the now-exposed deeper levels of the mine similar to the downward disappearance of microcrystalline |  | Simmons, S. F., Arehart, G., Simpson, M. P., Mauk, J. L. (2000) Origin of Massive Calcite Veins in the Golden Cross Low-Sulfidation, EpithermalAu-Ag Deposit, New Zealand. Economic Geology, 95 (1) 99-112 doi:10.2113/gsecongeo.95.1.99 | Journal (article/letter/editorial) | | Calcite Veins in the Golden Cross Low-Sulfidation, Epithermal Au-Ag Deposit, New Zealand STUART F. SIMMONS...University of Auckland, Private Bag, 92019, Auckland, New Zealand GREG AREHART,* Institute of Geological and Nuclear...Wairakei Research Centre, Private Bag 2000, Taupo, New Zealand MARK P. SIMPSON, Geology Department, University...University of Auckland, Private Bag, 92019, Auckland, New Zealand AND JEFFREY L. MAUK Geology Department, University... Private Bag, 92019, Auckland, New Zealand Abstract At Golden Cross, andesitic lavas and volcaniclastic |  | | Journal (article/letter/editorial) | | constraints from the Broken Hills deposit, Hauraki Goldfield, New Zealand Helen A. Cocker & Jeffrey L. Mauk &...rhyolite-hosted epithermal deposit in the Hauraki Goldfield of New Zealand. The opaque minerals include pyrite...other adulariasericite epithermal deposits in the Hauraki Goldfield and elsewhere worldwide. Broken Hills...electrum. Broken Hills is the only deposit in the Hauraki Goldfield where uytenbogaardtite and petrovskaite...92019, Auckland Mail Centre, Auckland 1142, New Zealand e-mail: J.Mauk@auckland.ac.nz S. D. C. Rabone |  | | Journal (article/letter/editorial) | | OF VOLCANIC ROCKS: I. THE GOLDEN CROSS EPITHERMAL ORE DEPOSIT, NEW ZEALAND DAVID A. TILLICK,l DONALD...University of Auckland, Private Bag 92019, Auckland, New Zealand 2Department of Geological Sciences, The University...interstratified clay minerals in the Golden Cross epithermal deposit, New Zealand, hydrothermally altered volcanic...(Yan et al., 2001), an active analogue of the Golden Cross ore deposit, in which hydrothermal clay minerals...GEOLOGIC SETTING AND SAMPLES Golden Cross epithermal Au-Ag deposit The Golden Cross low-sulfidation epithermal |  | | Journal (article/letter/editorial) | | mines, and application to the Martha AuāAg mine, Waihi, New Zealand Devin N. Castendyk a a,* , Jeļ¬rey L...Auckland, New Zealand b Geology Department, The University of Auckland, Private Bag 92019, Auckland, New Zealand...method to the Martha epithermal AuāAg mine, Waihi, New Zealand. Heterogeneous ore deposits, like Martha...nuisances depending on lake water chemistry. Many recent mine management strategies favor 0883-2927/$ - see front...into public amenities that will exist long after mine closure, as recreational areas, theme parks, scientiļ¬c |  | | Journal (article/letter/editorial) | | Gold-Silver-Base Metal Sulfide-Quartz Vein System, New Zealand: Temperature and Salinity Controls on Electrum...Nuclear Sciences, P.O. Box 31312, Lower Hutt, New Zealand Abstract The large, andesite-hosted quartz vein...volcanic zone and associated Hauraki goldfield in the North Island of New Zealand (Fig. 1). At Waihi, an extensive...(1924). Recent exploration and mining have provided new data and sample material for geological and geochemical...steam-heated ground water. 50km Main map AUCKLAND HAURAKI GOLDFIELD WAIHI NORTH ISLAND A UR HA WELLINGTON |  | Brathwaite, R., Simpson, M., Faure, K., Skinner, D. (2001) Telescoped porphyry Cu-Mo-Au mineralisation, advanced argillic alteration and quartz-sulphide-gold-anhydrite veins in the Thames District, New Zealand. Mineralium Deposita, 36 (7) 623-640 doi:10.1007/s001260100182 | Journal (article/letter/editorial) | | quartz-sulphide-gold-anhydrite veins in the Thames District, New Zealand Received: 28 August 2000 / Accepted: 2 April...on the northeastern margin of the Thames district, New Zealand. The geological setting is Jurassic greywacke...Sciences Ltd., P.O. Box 31-312, Lower Hutt, New Zealand E-mail: B.Brathwaite@gns.cri.nz Present address:...University of Auckland, Private Bag 92019, Auckland, New Zealand temperatures (450 to >600 Ā°C). These hypersaline...selvages from quartz-gold veins in the Thames district. Introduction A porphyry Cu-Mo-Au prospect was |  | Vidal, Conrado Permuy, Guido, Diego M., Jovic, SebastiĆ”n M., Bodnar, Robert J., Moncada, Daniel, Melgarejo, Joan Carles, Hames, Willis (2016) The Marianas-San Marcos vein system: characteristics of a shallow low sulfidation epithermal AuāAg deposit in the Cerro Negro district, Deseado Massif, Patagonia, Argentina. Mineralium Deposita, 51 (6) 725-748 doi:10.1007/s00126-015-0633-9 | Journal (article/letter/editorial) | | sulfidation epithermal AuāAg deposit in the Cerro Negro district, Deseado Massif, Patagonia, Argentina Conrado...Berlin Heidelberg 2016 Abstract The Cerro Negro district, within the Argentinian Deseado Massif province...contains about 70 % of the AuāAg resources in the district. Mineralization consists of Upper Jurassic (155...Patagonia . Argentina Introduction The Cerro Negro district is located at the northwestern margin of the Deseado...(1999) to define the region as an AuāAg metallogenic province. Since ā¼2000, the region has produced 4.9 Moz |  | | Report (chapter) | | arc-perpendicular active oblique and normal faults cross-cutting the outer arc reef platforms of the Grande-Terre...Thinon et al. 2010 and Mathieu et al. 2011; with new reliable K āAr ages of Samper et al. 2007). (b) Structural...Thin section showing the common replacement of plagioclase phenocrysts in the andesite clasts by adularia...that oxides are associated with adularia in the plagioclase ghost. Colours of adularia grains in (b) can...explained by the proportion of associated oxides. Plagioclase microlites in the matrix are also replaced by |  | Andrada de Palomera, Pablo, van Ruitenbeek, Frank J.A., van der Meer, Freek D., FernĆ”ndez, RaĆŗl (2012) Geochemical indicators of gold-rich zones in the La Josefina epithermal deposit, Deseado Massif, Argentina. Ore Geology Reviews, 45. 61-80 doi:10.1016/j.oregeorev.2012.01.001 | Journal (article/letter/editorial) | | et al., 1999), which is recognized as a valuable region for gold exploration. Most of the Au ā Corresponding...investigated by drilling. The aim of drilling is to cross the mineralized veins at different vertical levels;...is always anomalous. Therefore, each deposit or district should be studied separately to know which elements...the La Joseļ¬na district (Fig. 1). However, the predominant formation in the district, and the only one...ignimbrites, consisting of quartz, sanidine, plagioclase and biotite. In the basal part of the formation |  | Boomeri, Mohammad, Moradi, Rahele, Stein, Holly, Bagheri, Sasan (2019) Geology, Re-Os age, S and O isotopic composition of the Lar porphyry Cu-Mo deposit, southeast Iran. Ore Geology Reviews, 104. 477-494 doi:10.1016/j.oregeorev.2018.11.018 | Journal (article/letter/editorial) | | its various 34 igneous rocks have become a key region for both petrological and tectonic studies (e.g...youngest fault system strikes NE-SW and clearly 116 cross-cuts all mineralization and the LIC (Fig. 4). 117...lamprophyres (Fig. 5). The phenocrysts are sanidine, plagioclase, clinopyroxene, 159 hornblende, biotite, quartz...feldspar with minor ferro-magnesian minerals. Plagioclase and sanidine phenocrysts are variable 161 in...porphyritic, and contain mainly K-feldspar, plagioclase, 172 clinopyroxene, amphibole, and biotite |  | | 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...1 of about 20 known hydrothermal systems in the region (Fig. 1). These systems are liquid dominated and...Island, New Zealand. Widespread volcanism and hydrothermal activity have characterized the region for the...field showing well locations used to construct cross sections (Figs. 2 and 5). The Broadlands and Ohaaki |  | | Journal (article/letter/editorial) | | THE BROADLANDS-OHAAKI HYDROTHERMAL SYSTEM, NEW ZEALAND YONGHONG Y AN, 1 DAVID A. TILLlCK,2 DONALD...Auckland, New Zealand 3Geothermal Institute, University of Auckland, Private Bag, 92019, Auckland, New Zealand...from the Broadlands-Ohaaki hydrothermal system, New Zealand, were investigated using X-ray diffraction (XRD)...we ll known, are equivalent to those in the Golden Cross hydrothermal gold deposit as described in Part...Broadlands-Ohaaki geothermal system, North Island, New Zealand, is a currently active geothermal system. The |  | | Journal (article/letter/editorial) | | intrusion-centered hydrothermal systems and reflect district-scale magmatism (Simmons et al., 2005; John et...Comstock Lode, Martha Hill-Favona-Karangahake-Golden Cross-Thames (hereafter collectively referred to as...numbers of samples available for each deposit or district vary widely and are outlined in the primary data...quartzalunite deposits, respectively. Euhedral plagioclase is a nearly ubiquitous phenocryst-forming MA...of grain size information summarized below. Plagioclase laths, 2 to 10 mm long, are typically the most |
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