 | | Journal (article/letter/editorial) | | Pyrrhotite-Rich Massive Sulfide Deposits, Escanaba Trough, Southern Gorda Ridge TUOMO O. TÖRMÄNEN* Institute of...sediment-covered floor of the Escanaba trough, the slow-spreading, southernmost segment of Gorda Ridge. These concentrations...(löllingite and safflorite), Bi minerals (native bismuth, Bi tellurides, Bi-Te sulfides, and bismuthinite)...chimneys. The low solubility of Au as a bisulfide complex and the absence of fluid mixing during this stage...pyrrhotite-rich samples, low melting point of native bismuth (271.4°C), and recent experimental results on Au |  | | Report (volume) | | massive sulfide mound in the NESCA area in the Escanaba Trough , offshore of northern California, depth 3232...Hydrothermal, and Biologic Studies at Escanaba Trough, Gorda Ridge, Offshore Northern California JANET...hydrothermal, and biologic studies at Escanaba Trough, Gorda Ridge, offshore northern California I Janet...references. 1. Geology-Escanaba Trough. 2. Hydrothermal vents-Escanaba Trough. 3. Hydrothermal vent faunaEscanaba...faunaEscanaba Trough. 4. Escanaba Trough. I. Morton, Janet L. II. Zierenberg, Robert A. III. Reiss, Carol |  | Zierenberg, Robert A., Koski, Randolph A., Morton, Janet L., Bouse, Robin M. (1993) Genesis of massive sulfide deposits on a sediment-covered spreading center, Escanaba Trough, southern Gorda Ridge. Economic Geology, 88 (8) 2069-2098 doi:10.2113/gsecongeo.88.8.2069 | Journal (article/letter/editorial) | | averagingmorethan1 g/t Au. Massivesulfidefromthe Escanaba troughis enrichedin groupIV, V, andVI elementsrelativeto...ZIERENBERG ET AL. die Valley (northernJuande Fuca Ridge),and the cino fracture zone on the south and...approxiaboutthe tectonicsettingsand the natureof ore- Escanaba formingprocesses inancientpalcorift,sediment-dom-...inantenvironments. Data fromthe Escanaba trough, hough,1980; Wilson,1989). The Escanaba consistent with the slow-spreading...intersection Escanabatrough, the sediment-covered southern- with the Mendocino fracture zone. Southof 41ø17'N |  | | Report (issue) | | Mapping and Research: Working Together in the Pacific EEZ U.S. GEOLOGICAL SURVEY CIRCULAR 1092 AVAILABILITY...Mapping and Research: Working Together in the Pacific EEZ MILLINGTON LOCKWOOD, National Oceanic and Atmospheric...Mapping and Research : working together in the Pacific EEZ I Millington Lockwood and Bonnie A. McGregor...Includes bibliographical references. 1. Ocean bottom-Pacific Coast (U.S.)-Maps-Congresses. I. Lockwood...Program-Challenges and Choices John Carey 9 Mapping the Ocean Floor from the DMA-Defense Hydrographic Initiative |  | | Report (issue) | | originally given at an international workshop on deep ocean mineral resources beyond the limits of national...tectonic settings at the modern seafloor including mid-ocean ridges, back-arc rifts, and seamounts. Many of the...the sulphide deposits consist of a black smoker complex on top of a sulphide mound which commonly is underlain...sulphides, and vent biota at the crest of the East Pacific Rise at 21°N in 19791,2 confirmed that the formation...the discovery of hydrothermal vents at the mid-ocean ridges, significant mineral deposits have been documented |  | | Report (chapter) | | sulphide ores at Yaman Kasy in the Silurian of the southern Urals have yielded not only well-preserved sulphidized...zone is dominated by chalcopyrite. Minor gold and bismuth tellurides occur at the boundary between the middle...vent conduit wall. The occurrence of tellurium, bismuth and precious metal-bearing phases indicates some...massive sulphide ores at Y a m a n Kasy, in the southern Urals have yielded fragments o f black smoker...Urals. In." MILLS, R. A. & HARRISON,K, (eds) Modern Ocean Floor Processesand the GeologicalRecord, Geological |  | | Journal (article/letter/editorial) | | Precipitation of gold during conductive cooling of mid-ocean ridge black smoker (MOR) fluids occurs at low temperatures...In this case, the lower stability of the AuHS° complex at low ƒO2 (buffered by fayalite, magnetite, and...aqueous species to very low temperatures. These complex systematics make prediction of Au and Ag grades...sebastian.fuchs@bgr.de 1 GEOMAR – Helmholtz Centre for Ocean Research Kiel, Wischhofstrasse 1-3, 24148 Kiel,...1977 (Lonsdale 1977) and black smokers at East Pacific Rise a few years later (Francheteau et al. 1979; |  | Berkenbosch, H. A., de Ronde, C. E. J., Gemmell, J. B., McNeill, A. W., Goemann, K. (2012) Mineralogy and Formation of Black Smoker Chimneys from Brothers Submarine Volcano, Kermadec Arc. Economic Geology, 107 (8) 1613-1633 doi:10.2113/econgeo.107.8.1613 | Journal (article/letter/editorial) | | Volcano, Kermadec Arc H. A. BERKENBOSCH,†,1 C.E.J. DE RONDE,2 J. B. GEMMELL,1 A. W. MCNEILL,1 AND K. GOEMANN3...enrichment up to 91 ppm is due to scavenging by liquid bismuth. The presence of tellurides in Brothers chimneys...settings (e.g., Von Damm, 1990; Rona and Scott, 1993; de Ronde et al., 2003; Hannington et al., 2005). This...hydrothermal fluids at intraoceanic arc volcanoes (de Ronde et al., 2011; Huston et al., 2011). Brothers...0361-0128/12/4075/1613-21 Kermadec arc (Fig. 1; de Ronde et al., 2003, 2011). It is primarily dacitic |  | | Report (issue) | | 1987 4:00 5:00 Registration (East Lobby) Ice-breaker/Cash Bar Mixer (East Lobby) 3:20 3:40 Wednesday...southeastern Nevada (H. Richard Blank) Central San Juan caldera cluster, Colorado-New stratigraphic and...sediment-hosted hydrothermal mineral localities in Escanaba Trough, Gorda Ridge (Janet L. Morton, William R. Normark...aspects of ocean-floor hydrothermal-vent fluids and massive sulfide chimneys from the southern Juan de Fuca...Fuca Ridge 8. Chaffee, M. A., Chemical zoning of mineral deposits as an exploration technique-The Red Mountain |  | | Journal (article/letter/editorial) | | located in three main geological sectors, with the southern one containing most of the giant and supergiant...Toscano á G.R. AlmodoÂvar Departamento de GeologõÂ a, Universidad de Huelva, 21819 ± La RaÂbida, Huelva (Spain)...Peninsula, from Seville in Spain to the Atlantic Ocean, south of Lisbon, in Portugal (Fig. 1), making a...Almagrera S.A. (Cu-Pb-Zn-SAg); Riotinto by Minas de Riotinto, S.A.L. (Au-Ag); AznalcoÂllar-Los Frailes...by APIRSA-Boliden (Zn-CuPb-Ag); Tharsis by Minas de Tharsis (Pyrite) and Caledonia (Au-Ag). Apart from |  | Tesalina, S.G, Nimis, P, Augé, T, Zaykov, V.V (2003) Origin of chromite in mafic–ultramafic-hosted hydrothermal massive sulfides from the Main Uralian Fault, South Urals, Russia. Lithos, 70 (1) 39-59 doi:10.1016/s0024-4937(03)00090-2 | Journal (article/letter/editorial) | | massive sulfides could not originate on a mid-ocean ridge, but rather in an early arc or forearc environment...sulfide-associated chromites from two VHMS deposits of the southern MUFZ. These include the Ishkinino deposit studied...significance of Fig. 1. Geological sketch map of the southern Urals, with location of the Ivanovka and Ishkinino...resulted from the Late Palaeozoic collision of the East European Platform with a Siberian –Kazakhian plate...MUFZ, a 2 – 10 km wide (locally up to 25 km wide), east-dipping fault system, which can be traced continuously |  | | Journal (article/letter/editorial) | | Magazine, August 2008, Vol. 72(4), pp. 953–970 Gold-bismuth-telluride-sulphide assemblages at the Viceroy Mine... the close association of native gold, native bismuth and other Bi-Te-S phases suggests that gold was...mineralization, bismuth-tellurides-sulphides, Archaean, Viceroy and Mazowe Mines, Zimbabwe, Passagem de Mariana...its unusual gold bismuth-tellurides-sulphide association. The work reports on the complex ore mineralogy...Passagem de Mariana Mine in Brazil. Regional and mine geology Viceroy Mine is situated ~30 km east of Harare |  | | Journal (article/letter/editorial) | | three principal groups of massive sulfide lenses; the East lenses, the West lenses, and the Western Anomaly...higher than those measured at sediment covered ridge hydrothermal systems, which precipitate much of...Brunswick; Iberian Pyrite Belt of Portugal and Spain, Southern Urals, and Russia); although there are important...type VMS systems: the Ruttan VMS deposit, in the southern Rusty Lake Volcanic Belt of northern Manitoba...(Baldwin 1988). These units are 5–15 km to the east of Ruttan and broadly along strike, and appear to |  | Layton-Matthews, D., Peter, J. M., Scott, S. D., Leybourne, M. I. (2008) Distribution, Mineralogy, and Geochemistry of Selenium in Felsic Volcanic-Hosted Massive Sulfide Deposits of the Finlayson Lake District, Yukon Territory, Canada. Economic Geology, 103 (1) 61-88 doi:10.2113/gsecongeo.103.1.61 | Journal (article/letter/editorial) | | been interpreted to be the subvolcanic intrusive complex for the Kudz Ze Kayah and GP4F deposits (Piercey...rocks, and, at the top of the succession, midocean ridge basalt (MORB) flows. Rocks of the Wolverine succession...Stratigraphically above type 2 mineralization, a texturally complex sulfide mineralization is dominated by sphalerite...smoker sites (e.g., up to 1,000 ppm at 13°N East Pacific Rise: Auclair et al., 1987). However, pyrite compositions...thermodynamic predictions. In surface and near-surface open ocean water, selenium is present in lower concentrations |  | Melekestseva, Irina Yu., Maslennikov, Valery V., Tret’yakov, Gennady A., Nimis, Paolo, Beltenev, Victor E., Rozhdestvenskaya, Irina I., Maslennikova, Svetlana P., Belogub, Elena V., Danyushevsky, Leonid, Large, Ross, Yuminov, Anatoly M., Sadykov, Sergey A. (2017) Gold- and Silver-Rich Massive Sulfides from the Semenov-2 Hydrothermal Field, 13°31.13′N, Mid-Atlantic Ridge: A Case of Magmatic Contribution?. Economic Geology, 112 (4) 741-773 doi:10.2113/econgeo.112.4.741 | Journal (article/letter/editorial) | | Semenov-2 Hydrothermal Field, 13°31.13'N, Mid-Atlantic Ridge: A Case of Magmatic Contribution?* Irina Yu. Melekestseva...Semenov-2 hydrothermal field on the Mid-Atlantic Ridge is host to a rather unique Cu-Zn– rich massive sulfide...studied are similar to those of the Mid-Atlantic Ridge ultramafic-hosted Cu-Zn–rich massive sulfides, such...back-arc structures (e.g., JADE field, Okinawa Trough, up to 24 ppm Au and 1.1 wt % Ag; Halbach et al...volcano, Kermadec volcanic arc, up to 91 ppm Au; de Ronde et al., 2011; Vai Lili field, Lau back-arc |  | Moreno, C., Sáez, R., González, F., Almodóvar, G., Toscano, M., Playford, G., Alansari, A., Rziki, S., Bajddi, A. (2008) Age and depositional environment of the Draa Sfar massive sulfide deposit, Morocco. Mineralium Deposita, 43 (8) 891-911 doi:10.1007/s00126-008-0199-x | Journal (article/letter/editorial) | | rocks are also present in the footwall to the southern orebody. Shales, rhyolitic volcanic rocks, and...Almodóvar : M. Toscano Departamento de Geología, Universidad de Huelva, Huelva, Spain e-mail: carmor@uhu...Queensland, Brisbane, Australia A. Alansari Département de Géologie, Université Cadi Ayyad, Marrakech, Morocco...is located 16 km north of Marrakech, near the southern boundary of the Jebilet Massif, in western Morocco...north of Marrakech (Fig. 1b). Its northern and southern boundaries are faulted and mostly covered by Pliocene– |  | | Journal (article/letter/editorial) | | occurrences have been studied in the Prades Mountains, southern part of the Coastal Catalonian Ranges. Most of...isotopic analyses were made on three outcrops (Roca de Ponent, Coma Fosca and Sant Miquel) and in the Silurian...of d34S values (–11.3 to –4.6&), whereas the Roca de Ponent and Sant Bernat series have a wider range...from the top of the Sant Bernat series). In the Roca de Ponent outcrop the d34S values decrease with increasing...Melgarejo Departament de CristalÆlografia, Mineralogia i Dipòsits Minerals, Universitat de Barcelona, Martı́ |  | Maslennikov, V.V., Maslennikova, S.P., Large, R.R., Danyushevsky, L.V., Herrington, R.J., Ayupova, N.R., Zaykov, V.V., Lein, A.Yu., Tseluyko, A.S., Melekestseva, I.Yu., Tessalina, S.G. (2017) Chimneys in Paleozoic massive sulfide mounds of the Urals VMS deposits: Mineral and trace element comparison with modern black, grey, white and clear smokers. Ore Geology Reviews, 85. 64-106 doi:10.1016/j.oregeorev.2016.09.012 | Journal (article/letter/editorial) | | Nakhimosvsky av., 36, Moscow f TE 117997 Russia John de Laeter Centre, Department of Imaging and Applied...associated with serpentinites of the Mid-Atlantic Ridge. The chimneys from the Buribay deposit are similar...to the black and clear smokers from the Okinawa Trough. Mineral assemblages are controlled by the combination...deposits. Original LA-ICP-MS data on smokers from the Pacific and Atlantic oceans are used for comparison with...dacite–rhiolite unit close to basalt basement of the East Magnitogorsk island arc, whereas Uzelga-1, Talgan |  | | Book | | proceedings of the Gold '86 meeting in Toronto, the Pacific Rim Congress '87 in Gold Coast, Australia, and...Browne, A.H.C. Carter, H. Colley, D.S. Cronan, M.J. de Wit, P.I. Eimon, W.R. Fitches, A.O. Fuller, A.P....epithermal deposits in the Western Great Basin and Pacific Northwestern United States. Administratively, he...and exploration in Europe, Africa, and the Middle East. Professor D.1. Groves Key Centre for Teaching...exploration for hydrothermal vents in the Indian Ocean and studies of the geology and mineralogy of sulphide |  | | Report (volume) | | (08) 379-0444 Fax (08) 379-4634) India Affiliated East-West Press pvt Ltd G-l/16 Ansari Road New Delhi...hydrothermal vent field: 29~ on the Mid-Atlantic Ridge 33 KRASNOV, S. G., CHERKASHEV,G. A., STEPANOVA...the TAG and MARK sites (1986, 1990) Mid-Atlantic Ridge: a new solution chemistry model and a mechanism... • GERMAN, C. R. Venting from the Mid-Atlantic Ridge at 37~ the Lucky Strike hydrothermal site 87 JAMES...Hydrothermal plumes at Broken Spur 29~ Mid-Atlantic Ridge: chemical and physical characteristics PALMER,M |  | | Report (issue) | | of sediment-hosted massive sulfide in Escanaba trough, Gorda Ridge-by Robert A. Zierenberg, J.M. Edmond...of the White Mountains National Recreation Area, east-central Alaska-by Florence R. Weber, Thomas D. Light...Nevada-by Theresa M. Cookro and Ted G. Theodore 26. Bismuth minerals associated with placer gold, Battle Mountain...sulfide deposits in pre-Tertiary island arc and ocean basin environments in Nevadaby Maureen G. Sherlock...setting of stratiform manganese deposits in the southern Basin and Range province-by Randolph A. Koski |  | Zhang, Yaoyao, Chu, Fengyou, Li, Zhenggang, Dong, Yanhui, Wang, Hao, Li, Xiaohu, Long, Jiangping (2020) Gold enrichment in hydrothermal sulfides from the Okinawa Trough: An in situ LA-ICP-MS study. Ore Geology Reviews, 116. 103255 doi:10.1016/j.oregeorev.2019.103255 | Journal (article/letter/editorial) | | enrichment in hydrothermal sulfides from the Okinawa Trough: An in situ LA-ICP-MS study Yaoyao Zhang, Fengyou...enrichment in hydrothermal sulfides from the Okinawa Trough: An in situ LA-ICP-MS study, Ore Geology Reviews...enrichment in hydrothermal sulfides from the Okinawa Trough: An in situ LA-ICP-MS study Yaoyao Zhanga, Fengyou...physicochemical controls on gold enrichment in the Okinawa Trough, an immature back-arc basin. We conducted a systematic...in hydrothermal sulfide deposits in the Okinawa Trough, along with the more common Zn- and Cu-rich hydrothermal |  | | Book | | the Japanese Islands as well as other western Pacific regions. vi Preface In Chapter 2, a geochemical...deposits) are compared with those of midoceanic ridge deposits and Kuroko deposits. In Chapter 3, hydrothermal...estimated. These fluxes are compared with midoceanic ridge hydrothermal fluxes. Particularly, hydrothermal...relationships in Kuroko and vein-type deposits in southern Hokkaido, Japan ....................... 1S.4............................... 2.3. I .1. Okinawa Trough ......................... ............. 2.3. I |  | Nimis, Paolo, Tesalina, Svetlana G., Omenetto, Paolo, Tartarotti, Paola, Lerouge, Catherine (2004) Phyllosilicate minerals in the hydrothermal mafic?ultramafic-hosted massive-sulfide deposit of Ivanovka (southern Urals): comparison with modern ocean seafloor analogues. Contributions to Mineralogy and Petrology, 147 (3) 363-383 doi:10.1007/s00410-004-0565-3 | Journal (article/letter/editorial) | | massive-sulfide deposit of Ivanovka (southern Urals): comparison with modern ocean seafloor analogues Received:...deposit of Ivanovka (Main Uralian Fault Zone, southern Urals). The main hydrothermal phyllosilicate minerals...massive sulfide deposits is well known both in modern ocean seafloor hydrothermal sites and in their ancient...mafic–ultramafic-hosted, massive sulfide deposits in southern Urals. In this paper we describe phyllosilicate...resulted from the Late-Palaeozoic collision of the East European Platform with a Siberian–Kazakhian plate |  | | Journal (article/letter/editorial) | | inset map showing simplified geology of the Hill End Trough (modified from Colquhoun et al. 1997; Meakin et...textures Æ Limestone Æ Lachlan Fold Belt Æ Hill End Trough Æ Australia Introduction Lewis Ponds is a polymetallic... located at the western margin of the Hill End Trough, 190 km northwest of Sydney (Fig. 1). Two stratabound...succession at the western margin of the Hill End Trough, eastern Lachlan Fold Belt (Fig. 1). The Lachlan...formation of rift basins, including the Hill End Trough (Scheibner 1998; Scheibner and Veevers 2000). Major |
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