 | | Journal (article/letter/editorial) | | Deposits and Prospects of the Waitekauri Area, Hauraki Goldfield, New Zealand MARK P. SIMPSONâ 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...interstratified illite-smectite, smectite, calcite, hematite, and minor epidote. Many of these minerals have...et al., 2003; Comstock: Hudson, 2003; Favona, New Zealand: Simpson and Mauk, 2007). Many papers describe |  | 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,â ...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) | | GoldenCrossEpithermalGold-SilverDeposit,Waihi, New Zealand CORNELE. J. DE RONDE* Geology DepartmentUniversity...NewZealandGeologicalSurâąetd, 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...hydrothermalactivitywaned,precipitated kaolinite ñ hematite ñ jarosite. Fluid inclusionstudiesrevealthat in...previouslybeendescribedfromepithermal depositsin New Zealandandpossiblycontainorganicliquid(s). Oxygenisotopesof |  | | Journal (article/letter/editorial) | | Hydrologic Evolution of the Golden Cross Epithermal Au-Ag Deposit, New Zealand MARK P. SIMPSON,â 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 Ă 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) | | Au-Ag Deposits: A Case Study from the Waitekauri Area, New Zealand MATHIJS A. BOODEN,â 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-quartzârich rocks close to the Waitekauri fault. Other major elements are preferentially |  | | 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, âą 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 |  | 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,â 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. SIMPSONâ 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 Ă 450 m deep) that transect...for veins. The veins at Favona, Martha, and Golden Cross (Empire vein), combined with a resource at Karangahake |  | 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 °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, SebastiĂĄn 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 AuâAg 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 AuâAg 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 AuâAg 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 AuâAg metallogenic province. Since âŒ2000, the region has produced 4.9 Moz |  | | Journal (article/letter/editorial) | | SCIENCE Vol. 304, No. 5, 2003 947 971 COPSE: A new model of biogeochemical cycling over Phanerozoic...Chemostratigraphy of flood basalts in the GarzĂȘ-Litang region and Zongza block: Implications for western extension...Mesozoic intrusive complexes in the Xuzhou-Huainan Region, central China: Constraints from SHRIMP zircon...Fleet Empressite, AgTe, from the Empress-Josephine mine, Colorado, U.S.A.: Composition, physical properties...Goldring The geology and genesis of high-grade hematite iron ore deposits âN.J. Beukes, J. Gutzmer, and |  | Zhai, Wei, Sun, Xiaoming, Sun, Weidong, Su, Liwei, He, Xiaoping, Wu, Youliang (2009) Geology, geochemistry, and genesis of Axi: A Paleozoic low-sulfidation type epithermal gold deposit in Xinjiang, China. Ore Geology Reviews, 36 (4) 265-281 doi:10.1016/j.oregeorev.2009.04.003 | Journal (article/letter/editorial) | | Technology of China, Heifei, 230026, PR China e Axi Gold Mine, Yining, Xinjiang, 835000, PR China b c a r t i...gold, electrum, pyrite, marcasite, arsenopyrite, hematite, limonite, and trace amounts of pyrargyrite, polybasite...Kelian in Indonesia, Golden Cross in New Zealand, Ladolam and Porgera in Papua New Guinea, Chinkuashih...western Tianshan orogenic belt in Xinjiang Autonomous Region, China. The wall rocks of the deposit are subaerial...and identifying guidelines for exploration in the region. 2. Geological setting The Axi gold deposit is |  | 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...veinlets. 288 Based on petrographic examination and cross-cutting relationships, at least five main groups...veinlets that are <1 mm thick (Fig. 17c), (d) hematite-bornite veinlets that are <1 mm thick (Fig. 17f)...bornite, molybdenite, magnetite and rare pyrite, hematite and enargite as hypogene minerals 295 and covellite |  | Kouhestani, Hossein, Mokhtari, Mir Ali Asghar, Chang, Zhaoshan, Johnson, Craig A. (2018) Intermediate sulfidation type base metal mineralization at Aliabad-Khanchy, Tarom-Hashtjin metallogenic belt, NW Iran. Ore Geology Reviews, 93. 1-18 doi:10.1016/j.oregeorev.2017.12.012 | Journal (article/letter/editorial) | | veinlets that are, in turn, cut by stage 4 quartz-hematite veins and veinlets (Fig. 5E). No sulfide minerals...crystals in vugs. Stage 4 is marked by 2 cm wide hematite-quartz veins and veinlets (Fig. 5F) that formed...chalcopyrite (>50 vol. %), pyrite (â€15 vol. %), and hematite (â€10 vol. %) with supergene malachite, azurite...veins or irregular aggregates with chalcopyrite. Hematite is an accessory mineral that forms bladed euhedral...characterized by deposition of microcrystalline quartz, hematite and chlorite. The alteration assemblage accompanying |  | | Report (issue) | | ======================================ï„ Whatâs New in the Mineral World? Report #36 November 14, 2013...some visitors to this column: a selection of whatâs-new items being offered online at this pleasant time...evenings⊠Clinoatacamite, 5.6 cm, from the Lily mine near Pisco, Pisco Province, Ica Department, Peru...will read of a new find of atacamite and the very rare clinoatacamite in the Lily mine, Pisco Province...Province, Ica Department, Peru. In 1998 this copper mine began giving up beautiful specimens showing transparent |  | Andrada de Palomera, Pablo, van Ruitenbeek, Frank J.A., van der Meer, Freek D., FernĂĄndez, RaĂșl (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 â 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 JoseïŹna district (Fig. 1). However, the predominant formation in the district, and the only one...area. Boreholes were drilled sub-parallel to the cross sections, towards SW. P. Andrada de Palomera et |  | | Journal (article/letter/editorial) | | profile across a multistage, m-wide vein of the Clara mine, Central Schwarzwald. These results highlight the...at different times. In particular for the Clara mine veins such repeated reactivation from Permian to...KâAr, RbâSr and (U,Th)/ He methods, in the Clara mine and for a number of faults in the area (Lippolt...K-feldspar, sericite, clay minerals, apatite, monazite, hematite, anatase, and very fine grained, Ti-rich aggregates...chloritization of biotite combined with growth of hematite and leucoxene. These processes give rise to a |  | | Report (chapter) | | to use when assessing economic favorability of a region or prospect. This chapter summarizes the various...fission track dating) and is therefore useful for cross-calibration purposes and complementary low-T history...40Ar/39Ar) and zircon (U-Th)/He ages. Oxide (magnetite, hematite, rutile) (U-Th)/He. Since Fanale and Kulpâs (1962)...Mn-oxides has been primarily aimed at dating magnetite-hematite and base metal vein mineralization (Lippolt and...specularite grains and >90â 160 °C for botryoidal hematite (>10 ”m diameter) have been suggested (BĂ€hr et |  | | 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 . . . . . . . . . . . . . . . . . . . . ..... . . . . . . . . 5.3.3 Hauraki Goldfield, Coromandel Peninsula, New Zealand 5.3.4 The Epithermal Systems |  | | Conference Proceedings (Volume) | | Cover photograph: View of the Aitik open pit copper mine in the very north of Sweden. Mining operations started...regional scale 3D-model of the Skellefte mining district, northern Sweden ..............................VHMS-type deposits, Kristineberg area, Skellefte District, Sweden . . ....................................epithermal Au-Ag mineralisation at Golden Cross, Hauraki Goldfield, New Zealand ................ 70 A.B.... Christie & R. Carver A new storage approach for 3D Modeling ..................................... |  | Kouhestani, Hossein, Mokhtari, Mir Ali Asghar, Qin, Kezhang, Zhao, Junxing (2019) Fluid inclusion and stable isotope constraints on ore genesis of the Zajkan epithermal base metal deposit, TaromâHashtjin metallogenic belt, NW Iran. Ore Geology Reviews, 109. 564-584 doi:10.1016/j.oregeorev.2019.05.014 | Journal (article/letter/editorial) | | chalcopyrite ± pyrite veins and breccias, (3) quartz-hematite veins and breccias, and (4) barren quartz-carbonate...chalcopyrite, sphalerite, galena, and trace amounts of hematite; gangue minerals are mainly quartz, sericite,...depth of Zajkan indicates minor denudation in the region and may imply a great prospecting potential for...(70â90 vol%). Hydrothermal quartz, sulïŹde and hematite are the main minerals of the 3. Geological characteristics...quartz along with bladed crystals of hematite in quartz-hematite veins and breccia cements (Fig. 5CâE) |  | Zamanian, Hassan, TaleFazel, Ebrahim, Hayatalgheybi, Masome, Samani, Bahram Agha Ebrahimi, Harris, Chris (2020) Geochemical, fluid inclusion and OâHâS isotope studies of the Milajerd Au-polymetallic prospect, Central Iran: Implications for ore genesis. Ore Geology Reviews, 120. 103444 doi:10.1016/j.oregeorev.2020.103444 | Journal (article/letter/editorial) | | poorly-known metallogenic belt. This study presents new geological, geochemical, fluid inclusions and HâOâS...Milajerd prospect are exposed extensively through the district and consist of andesite, basalt, dacite, trachyandesite...field (Fig. 7d). Volcanic rocks from the Milajerd district define a typical calc-alkaline trend on an AFM...edifices are common and well developed within the ore district. The fractures are predominantly NW-trending and...zones. The volcanic edifices in the Milajerd ore district are mainly ore-controlling structures, including |  | | Journal (article/letter/editorial) | | mineral assemblages are quartz, chalcopyrite, hematite, fluorite, and chlorite. Five stages of mineralized...quartz-chalcopyrite stockwork and breccia veins (stage-2), hematite-bearing quartz veins (stage-3), quartz infilling...of epithermal fluids. The results place important new constraints on conditions of epithermal ore formation...65 to 75°. According to mineral associations and cross-cutting relations, five stages of mineralization...(d), respectively; (e) Stage-3 mineralization as hematite-bearing quartz veins which are crosscutting the |  | Abidin, Hamdan Z., Harahap, Bhakti H. (2007) Indikasi Mineralisasi Epitermal Emas Bersulfi Da Rendah, Di Wilayah Kecamatan Bonjol, Kabupaten Pasaman, Sumatera Barat [Indications of Low Da-Sulfated Gold Epithermal Mineralization, in the Bonjol District, Pasaman Regency, West Sumatra]. Indonesian Journal of Geology, 2 (1) 55-67 doi:10.17014/ijog.2.1.55-67 | Journal (article/letter/editorial) | | ABSTRACT Bonjol gold prospect, known as Old Dutch Gold mine, consists of several ore bodies (Malintang, Balimbing...minor pyrite, sphalerite and galena. Besides this, hematite, jarosite and manganese are also present as supergene...Hishikari, Jepang (Izawa dkk., 1990), Golden Cross, New Zealand (Lawless dkk., 1988) dan Creede, Colorado...yang dijumpai dalam batuan Gunung Api Taupo (New Zealand) (Henley and Hoffman, 1987) dan lingkungan pemekaran...sangat mirip seperti yang terjadi di Taupo (New Zealand) (Lawless dkk., 1995) dan Hishikari (Jepang) |  | | Book | | proportion of the accumulating information. This new book represents an attempt to address this major...of gold mineralization. For access to a wealth of new information the reader is encouraged to tum to the...demand for gold in the 1980s has opened up exciting new avenues of research and generated a wealth of hard...James Crocket is a graduate of the University of New Brunswick, Oxford University, and the Massachusetts...Manchester in 1973 (Ph.D.) and was then employed as a mine and exploration geologist by Falcon Mines Ltd in |
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