 | | Journal (article/letter/editorial) | | Hydrologic Evolution of the Golden Cross Epithermal Au-Ag Deposit, New Zealand MARK P. SIMPSON,† 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 × 450 m deep), located 200...conditions. Veins and alteration minerals at Golden Cross formed in the shallow part (<400 m) of a hydrothermal |  | 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,† 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 |  | | 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) | | mines, and application to the Martha Au–Ag mine, Waihi, New Zealand Devin N. Castendyk a a,* , Jeffrey L...Auckland, New Zealand b Geology Department, The University of Auckland, Private Bag 92019, Auckland, New Zealand...method to the Martha epithermal Au–Ag 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, scientific |  | Vidal, Conrado Permuy, Guido, Diego M., Jovic, Sebastián 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 Au–Ag 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 Au–Ag 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 Au–Ag 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 Au–Ag metallogenic province. Since ∼2000, the region has produced 4.9 Moz |  | | Report (issue) | | ====================================== What’s New in the Mineral World? Report #36 November 14, 2013...some visitors to this column: a selection of what’s-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...this copper mine began giving up beautiful specimens showing transparent, colorless gypsum crystals densely |  | | Report (issue) | | Formation..,. 1 Alverson Andesite Fish 1 Creek Gypsum _. Palm Spring Formation Canebrake Conglomerate...RESOURCES District 25 Summaries 25 Coyote Mountains district Fish Creek Mountains district Southeastern...Mountains district _ Cargo Muchacho district Pa lo Verde district Paymaster Commodity district 31 Discussions...resources Geothermal exploration Gold 41 Graphite Gypsum Iron ____ Kyanite Limestone and marble _ Manganese...Hedges, circa 1900 Main vein pit, Pioneer manganese mine East shore of Lake Cahuilla West shore of Lake Cahuilla |  | Xiao, ChangHao, Wang, QingFei, Li, GongJian, Zhou, XingZhi, Zhao, Yan (2017) Subduction-related hot spring-type gold mineralization in the central Tengchong block, southwestern China. Ore Geology Reviews, 90. 987-997 doi:10.1016/j.oregeorev.2016.12.011 | Journal (article/letter/editorial) | | 2005; 37 Peters, 1990), Porgera and Lihir in Papua New Guinea (Richards et al., 1991; White et 38 al....the Rehai geothermal region in the Tengchong 55 block. In this geothermal region, the ancient Lianghe...and the Lianghe deposit in the Rehai geothermal region, central 58 Tengchong block were investigated...zone of Indian plate. The oldest stratum in the region is the Proterozoic 68 Gaoligongshan Group, consisting...springs in the Rehai geothermal region 87 The Rehai geothermal region, located ~11 km southwest of Tengchong |  | | Book | | jumping well-established claims to this scholarly gold mine. This uneasiness on my part grew considerably when...and reworked each of the chapters, any defects are mine. In addition to those individuals who have already...Historical Society, and Mr. Glen Settle, of the Tropico Mine, have also supplied several Kern County photographs...learned of the exciting discovery of the Yellow Aster Mine the previous year, and now of several additional...perhaps the deposit could be developed into a paying mine. As Blue found additional pieces of float, his interest |  | | Journal (article/letter/editorial) | | Auckland, Auckland Mail Centre, Auckland 1142, New Zealand Abstract Volcanic rocks hosting quartz ± calcite...fresh volcanic rocks of the Taupo volcanic zone, New Zealand (Graham et al., 1995). line, the dominant K-bearing...San Cristóbal 54Ma El Peñón 52-53Ma property/ district 24° La Escondida deposit El Soldado 51-53Ma...produced supergene minerals consisting of kaolinite, gypsum, alunite, jarosite, and Fe and Mn oxyhydroxides...volcaniclastic rocks. The samples are from four east-west cross sections (Fig. 4), 7301250, 7301800, 7302300, and |  | | Report (issue) | | Clear Creek district Cove district, by Thomas Gay, E. Jr. Paso Mountains district Erskine Creek...Creek district El Gorman tin 31 district : Greenhorn Mountain district Greenhorn Summit tungsten district...district Indian Wells Canyon district Jawbone Canyon district Kern River Canyon district Keysville district...district Kramer borate Loraine district Mojave district district, Mountains Piute Rademacher...Rademacher Rand district Tehachapi by William E. Ver Planck 41 1 43 45 47 47 district district _ Red |  | | Journal (volume) | | Geologist C. A. LOGAN, District Mining Engineer C. McK. Laizure, District W. Burling Tucker, Reid...Engineer District Sampson, Assistant Mining Engineer District Engineer Chas. V. Averii.l, District Mining...Mining Engineer J. C. O'Brien, District Mining Engineer George John Gary, Mineral Technologist L. ... CONTENTS Page REPORTS OF DISTRICT MINING ENGINEERS Sacramento Field District 6 7 Mines and Mineral Resources...now available is appended hereto, and the names of new bulletins will be added in the future as they are |  | | Journal (article/letter/editorial) | | alteration of Miocene volcanic units in the Gedikler region and the area surrounding the Kışladağ gold deposit...Miocene volcanic rocks in the Eşme (Uşak Province) region. The alteration developed in rhyolitic to andesitic...Fe-oxide/hydroxidized. Kaolinite decreases, smectite ± illite, gypsum, barite, alunite, jarosite, pyrite, native gold...sericitization and silicification increase from the Gedikler region towards the Kışladağ porphyry gold deposit. SEM...δ34S and positive δ18O values for jarosite and gypsum suggest oxidation of pyrite in a supergene environment |  | | Journal (article/letter/editorial) | | chlorite, kaolinite, illite, alunite, jarosite, and gypsum. Phyllic alteration (without calcite and epidote)...D. R. Lentz Department of Geology, University of New Brunswick, Fredericton, NB, Canada Present address:...as parallel veins, however, locally, they show cross cutting relationship. Some of the veins were filled...after the first stage. This is consistent with cross cutting relationships of these veins, which suggest...Petrol (2008) 94:123–143 Quartz–hematite–calcite–gypsum assemblage This assemblage occurs as veins or pockets |  | | 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 |  | | Journal (article/letter/editorial) | | Alteration and Mineralization in the Comstock District, Nevada DONALD M. HUDSON† 1540 Van Petten Street...metal deposits of the world-renowned Comstock district of western Nevada constitute one of several superimposed...superimposed Miocene hydrothermal systems. In the district, Mesozoic metasedimentary and igneous rocks are...kaolinite alteration exposed at the periphery of the district may be linked to preore alteration near the paleowater...elsewhere in the district. Pliocene to Holocene reactivation of faults has disrupted the district, redistributing |  | | Journal (article/letter/editorial) | | oxide minerals, and the sulfate minerals jarosite, gypsum, alunite, and natroalunite. Kaolinite crystals...comprised locally transported sediment (Southern Cross Formation), derived from the same andesitic precursor...carbon-coated Cu grid and allowed to dry. Figure 1. Cross section showing the locations of the samples subjected...jarosite, alunite, natroalunite, and gypsum, whereas the Southern Cross Formation is dominated by quartz...kaolinite morphologies were identified in the Southern Cross Formation sediments (B15; Figure 3d). Larger crystals |  | | Journal (volume) | | Geologist C A. Logan, District Mining Engineer C. McK. Laizure, District W. Burling Tucker, Reid...Reid J. Frank Sanborn, District Mining Engineer District Engineer Mining Engineer Mineral Technologist...Ore-Buyers' Inspector Henry H. Symons, J. C. District Sampson, Assistant Ohas. V. Averill, John ...Reports of District Milling' Engineers Redding Field District Sacramento Field District San Francisco...Francisco Field District Los Angeles Field District Mineral Development and Mining Activity in Southern « California |  | | Journal (volume) | | ANNUALLY. The Engineering & Mining Journal PUBLISHERS. NEW YORK, 261 Broadway. LONDON, 20 Bucklersbury, The...STRUTHERS, Ph.D VOL. XI SUPPLEMENTING VOLUMES I TO X NEW YORK and LONDON THE ENGINEERING AND MINING JOURNAL...Emery—Feldspar — Fluorspar—Fullers Earth—GarnetGraphite—Gypsum — Iron Ore—Magnesite—Manganese Ore MicaMolybdenum...Japan—Mexico—Portugal—Servia—Spain Turkey—Market Conditions in New York—Technology—Electrolytic Extraction of Antimony...France—Germany—Italy—Trinidad and Tobago—Turkey—Venezuela —The New York & Bermudez Co.—Ozokerite—Austria—United States |  | | Journal (article/letter/editorial) | | hosting different gangue and ore mineral assemblages cross-cut the crystalline basement rocks. Many of the...veins in the Schwarzwald area were precipitated by district-scale mixing of a homogeneous deep saline brine...evaporitic units, which host significant amounts of gypsum and anhydrite. Small remnants of Paleozoic sedimentary...Sb–Ag-bearing quartz veins occurring throughout the entire district, Co–Ni–Ag–Bi–U-bearing barite–fluorite veins (most...sub-recent calcite sinters can be observed in the mine workings (stage IV). The hydrothermal remobilization |  | | Journal (article/letter/editorial) | | with breccia bodies. The insets show schematic cross-section through the Chah Zard deposit, and zonal...cm wide, are overprinted by 2 cm wide supergene gypsum 4B veins. They usually show evidence of sequential...were performed at the National Isotope Centre, New Zealand, using a laser-based extraction technique with... Tectonics of the Zagros orogenic belt of Iran: new data and interpretations. Tectonophysics 229, 211–238...Geochemistry of Hydrothermal Ore Deposits. John Wiley, New York (971 pp.). Bindeman, I.N., 2008. Oxygen isotopes |  | John, D. A., Hofstra, A. H., Fleck, R. J., Brummer, J. E., Saderholm, E. C. (2003) Geologic Setting and Genesis of the Mule Canyon Low-Sulfidation Epithermal Gold-Silver Deposit, North-Central Nevada. Economic Geology, 98 (2) 425-463 doi:10.2113/gsecongeo.98.2.425 | Journal (article/letter/editorial) | | Phelps Dodge Tyrone, Inc., P.O. Box 571, Tyrone, New Mexico 88065 AND ERIC C. SADERHOLM * Newmont Gold...Company, Yanacocha, Peru Abstract The Mule Canyon mine exploited shallow, low-sulfidation, epithermal Au-Ag...rift (White and Hedenquist, 1990). THE MULE CANYON mine exploited low-sulfidation epithermal Au-Ag deposits...(Quaternary) Olivine basalt (Miocene) Mule Canyon Mine 2 Trachydacite (Miocene) 4 3 5 8 Muleshoe fault...(Oligocene) Sedimentary rocks (Paleozoic) Contact Barite mine Fault, dotted where concealed. Ball on downthrown |  | | Report (issue) | | supplies of minerals, especially within the Empire, new methods of usage and other commercial developments...1 N. America : Canada . . . . . 2 3 Australasia: New South Wales ; Queensland ; South Australia ; Tasmania...; Vi c t o r i a ; W e s t e r n Australia ; New Zealand . . . . 52 • • CHAPTER I I I SOURCES OF SUPPLY...ValuSterling. ANNUAL VARIATIONS IN VALUE OF SILVER In New York, quotations for silver are given i n cents per...both gold and silver. T h u s , in the Kongsberg district the proportion of silver to gold is given a s |  | Marsh, S.P., Moyle, P.R., Knox, R.D., Howard, K.A., Raines, G.L., Hoover, D.P., Simpson, R.W., Rumsey, Clayton M. (1982) Mineral resource potential of the Sheep Hole-Cadiz Wilderness Study Area (CDCA-305), San Bernardino County, California. Open-File Report Vol. 1982 (82-957) US Geological Survey doi:10.3133/ofr82957 | Report (issue) | | resulted from a reconnaissance of the Mojave Desert region by Thompson (1929). Investigations and mapping...most strata of this age are metamorphosed in this region (Stone and others, 1981), nonmetamorphosed Paleozoic...associated there with gold mineralization at the America Mine, 10 miles (15 km) west of the northern Calumet Mountains...plutonic rocks were anomalous, one at the Calumet Mine, and another on the west edge of the south Calumet...1883 (Miller, 1965, p. 9-13). The Dale Mining District and the town and mill of Virginia Dale, southwest |  | | Journal (article/letter/editorial) | | Three times I have explored the Worth-Western district. On the first occasion I started from London early...2015 2 EDINBURGH GEOLOGICAL SOCIETY. every district is more or less hampered from the same cause....his recent report on the water supply at Southern Cross and Coolgardie, draws attention to the disasters...yet bring in its train. >He points out that the district is the most arid in Australia. Natural watercourses...excellently adapted for this purpose. At Southern Cross, where Mr Eollo is at present engaged in boring |
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