 | | Journal (article/letter/editorial) | | analyzed vent fluids. Twenty-three samples of chalcopyrite, pyrite, sphalerite, barite and anhydrite from...chimneys from four seafloor sites, Axial Seamount ŽJuan de Fuca Ridge., the Vai Lili vent field ŽLau Basin...hydrothermal field ŽMid-Atlantic Ridge., and the 218N vent field ŽEast Pacific Rise., as well as of pyritermarcasite...data of samples from the ASHES vent field at Axial Seamount define an inclined array consistent with phase...scale of several years Že.g. 218N vent field, East Pacific Rise; Campbell et al., 1988.; however, other systems |  | Zeng, Zhigang, Ma, Yao, Chen, Shuai, Selby, David, Wang, Xiaoyuan, Yin, Xuebo (2017) Sulfur and lead isotopic compositions of massive sulfides from deep-sea hydrothermal systems: Implications for ore genesis and fluid circulation. Ore Geology Reviews, 87. 155-171 doi:10.1016/j.oregeorev.2016.10.014 | Journal (article/letter/editorial) | | fields in the East Pacific Rise (EPR), Mid-Atlantic Ridge (MAR), Central Indian Ridge NU (CIR), Southwest...Southwest Indian Ridge (SWIR), and North Fiji Basin (NFB). The sulfur MA isotopic compositions of the...sub-seafloor hydrothermal systems in sediment-free mid-ocean ridges and mature back-arc basins. Furthermore,...minerals in the super-fast and fast spreading mid-ocean ridges (MORs) exhibit less spread in their the δ34S...from modern seafloor hydrothermal systems in mid-ocean ridges (MORs) D and back-arc basins (BABs) have |  | | Journal (article/letter/editorial) | | GeologicDevelopmentof Ridge Crests and Sulfide Depositsin the Northeast Pacific Ocean* ELLEN S. KAPPEL**...edpillowlavasaredominant(e.g.,southernExplorer Ridge).Sulfidedeposition duringstagei occursimmediatelyadjacentto...than do thosein stage 3. Axial Seamount,which straddlesJuande Fuca Ridge andis the westernterminationof...heavilysedimentedfailedrifts(e.g.,MiddleValleyof Endeavour Ridge)are the largest(tensof millionsof metric tons)andare...E. S.KAPPELANDJ. M. FRANKLIN areas,and at Axial Seamount,the exceptionallyhigh permeabilityin the sheetlava |  | | Journal (article/letter/editorial) | | of hydrothermal origin from the Central Indian Ocean b M. Halbach a,) , P. Halbach a , V. Luders ¨ a...in an extinct vent field in the Central Indian Ocean. There are two kinds of silica-rich rocks: a jasper...lesser extent by barite, pyrite and traces of chalcopyrite, and an opalite which is an almost pure silica-phase...relationship between the massive pyrite- and chalcopyrite-ores from the extinct chimney structures and...Žabove 300 8C. cycle dominated by pyrite and chalcopyrite formation and one later epithermal Žbelow 300 |  | Langmuir, C., Humphris, S., Fornari, D., Van Dover, C., Von Damm, K., Tivey, M.K., Colodner, D., Charlou, J.-L., Desonie, D., Wilson, C., Fouquet, Y., Klinkhammer, G., Bougault, H. (1997) Hydrothermal vents near a mantle hot spot: the Lucky Strike vent field at 37°N on the Mid-Atlantic Ridge. Earth and Planetary Science Letters, 148 (1) 69-91 doi:10.1016/s0012-821x(97)00027-7 | Journal (article/letter/editorial) | | Lucky Strike vent field at 37’N on the Mid-Atlantic Ridge C. Langmuir ‘,*, S. Humphris b, D. Fornari b, C...Fisheries ’ Department ’ Deportment Geophysics. and Ocean Sciences, University Unkersi&. Palisades, Institution...summit basin of a large seamount that forms the shallow center of a 65 km long ridge segment near 37”N on...on the Mid-Atlantic Ridge. The depth and chemistry of the ridge segment are influenced by the Azores hot...distribution of the relict sulfide deposits on the seamount summit in the areas investigated using DSV Alvin |  | Fallon, Emily, Frische, Matthias, Petersen, Sven, Brooker, Richard, Scott, Thomas (2019) Geological, Mineralogical and Textural Impacts on the Distribution of Environmentally Toxic Trace Elements in Seafloor Massive Sulfide Occurrences. Minerals, 9 (3) 162 doi:10.3390/min9030162 | Journal (article/letter/editorial) | | Cu, present in abundant, albeit less reactive chalcopyrite, but largely barren of other metals such as...[25–29], but also the surrounding deep or coastal ocean including background fauna (soft sediment benthos)...our lack of understanding of these unique and complex ecosystems. Whilst it has been demonstrated that...that are adapted to active vents along the East Pacific Rise, indicating the higher potential toxicity...[44,49], with a natural mineral ore containing complex mixtures of metals with a range of oxidation states |  | | Report (chapter) | | years of hydrothermal fluids from 13~ on the East Pacific Rise F. M. S T U A R T 1'2 P. J. H A R R O P 1...Manchester M I 3 9PL, UK 21sotope Geology Unit, SURRC, East Kilbride G75 OQU, UK 3Department o f Geology, University...activity at 13~ on the East Pacific Rise. The 3He/aHe ratios are typical of mid-ocean ridge hydrothermal fluids...from the 25 000 year old mineralization on the SE Seamount suggests that the hydrothermal circulation occurred...implies that seamount volcanism and hydrothermal activity occurred simultaneously off-ridge, and that magmatic |  | | Journal (article/letter/editorial) | | with the activity of hydrothermal vents on the ocean floor, the greatest progress during the last decade...fact that high-temperature mineragenesis on the ocean floor results in the formation of contemporary sulfide...sampled at the "hot" vents in the rift zones of the ocean. The appreciable collection of experimental data...high-temperature interaction with rocks of the ocean floor. While maintaining the overall level of mineralization...(200-350° C) fluids in widely separated mid-ocean, ocean-margin, and intercontinental rifts settings |  | | Journal (article/letter/editorial) | | of hydrothermal massive sulfides from the Juan de Fuca Ridge Kim Hyun Kim 1 and Gary M. McMurtry Department...Department of Oceanography, School of Ocean and Earth Sciences and Technology, University of Hawaii at...fields on the Endeavour Segment and Axial Seamount of the Juan de Fuca Ridge. 21°pb activities are mostly below...21°pb and Pb. For the hydrothermal fluid in Axial Seamount, a residence time of 10-20 years is estimated...concentrically sectioned sulfide chimney from Axial Seamount yielded mean radial growth rates ranging from |  | | Journal (article/letter/editorial) | | foundin samples fromtwo sulfidedeposits: the Axial Seamount(45057' N, 130002' W), and the southernExplorerRidge...silica,barite,andsphaleritefromthe top of the Axial Seamount depositgivesanalyses upto 6,700 ppbAu, averaging...calderaof the Axial Seamount,an activevolcanoon the spreading axisof the centralJuande Fuca Ridge,and (2) along...along the eastern axial valley of the southernExplorer Ridge.Thesedepositshavesimilarmorphology,mineralogy...mineralogyand geochemistry of gold-richsamplesfrom the Axial Seamountandthe southernExplorerRidge 1867 1868 |  | Fouquet, Y., Knott, R., Cambon, P., Fallick, A., Rickard, D., Desbruyeres, D. (1996) Formation of large sulfide mineral deposits along fast spreading ridges. Example from off-axial deposits at 12°43′N on the East Pacific Rise. Earth and Planetary Science Letters, 144 (1) 147-162 doi:10.1016/0012-821x(96)00142-2 | Journal (article/letter/editorial) | | ridges. Example from off-axial deposits at 12’43’N on the East Pacific Rise Y. Fouquet a,*, R. Knott... Rickard b, D. Desbruyeres a a IFREMER, Centre de Bresi, BP 70, 29280 Plowant!, France b Department...CFI 3YE, UK ’ Isorope Geology Unit. S. II.R.R. C, East Kilbride G75 OQU, UK Received 23 August 1995: accepted...pit-crater at the top of a young seamount 2 km east of the axial ridge we discovered one of the largest...spreading ridge (12 cm/yr). Despite an overlap in composition between axial and off-axial deposits the |  | | Book | | the Deep A Photographic Atlas of the Seafloor and Ocean Crust The deep oceans and global seafloor are truly...and fault zones in mountains a mile beneath the ocean surface, where bizarre landscapes host exotic life...components of the Earth’s ocean floor and the myriad environments found along mid-ocean ridges where new crust...Director of WHOI’s Deep Ocean Exploration Institute (DOEI), and was a Chair of the Ridge 2000 Program, a NSF-funded...NSF-funded national program studying mid-ocean ridges. Dr. Fornari is the author or co-author of over |  | | Journal (article/letter/editorial) | | structures on the Endeavour Segment of the Juan de Fuca Ridge Margaret K. Tivey and John R. Delaney School...that sulfide blocks 0.5 m across, dredged from the axial valley of the Endeavour Segment at 47°57'N, are...along normal faults at the base of the western axial valley wall, and are distributed for about 200 m...m along strike paralleling the 020 trend of the ridge crest. High-temperature fluids (350 to more than...submersible. These samples represent massive, complex portions of the sulfide structures which were not |  | | Report (chapter) | | 3 YE, UK 2Isotope Geosciences Unit, S U R R C , East Kilbride, Glasgow G75 OQU, UK 3 G E O M A R Technologie...main growth stage is dominated by pyrite and chalcopyrite, forming granular aggregates from < 1 mm to...Fouquet et al. (1988) at off-axis sites on the East Pacific Rise at 13~ (2000 to 20000 years, Lalou et al.... 1985); by AIt (1988) at the Green Seamount (70000 to 140 000 years, Alt et al. 1987); and by Scott et...et al. (1991) from the Southern Explorer Ridge (undated). This study is aimed at investigating in detail |  | James, Rachael H., Green, Darryl R.H., Stock, Michael J., Alker, Belinda J., Banerjee, Neil R., Cole, Catherine, German, Christopher R., Huvenne, Veerle A.I., Powell, Alexandra M., Connelly, Douglas P. (2014) Composition of hydrothermal fluids and mineralogy of associated chimney material on the East Scotia Ridge back-arc spreading centre. Geochimica et Cosmochimica Acta, 139. 47-71 doi:10.1016/j.gca.2014.04.024 | Journal (article/letter/editorial) | | mineralogy of associated chimney material on the East Scotia Ridge back-arc spreading centre Rachael H. James...mineralogy of associated chimney material on the East Scotia Ridge back-arc spreading centre, Geochimica et Cosmochimica...of associated 2 chimney material on the East Scotia Ridge back-arc spreading centre 3 Rachael H. James1*...University, London, Ontario, N6A 3K7, Canada 3 Ocean and Earth Science, National Oceanography Centre...European Way, Southampton, SO14 3ZH, Current address: Ocean and Earth Science, National Oceanography Centre |  | | Journal (article/letter/editorial) | | Middle Valley at the Juan de Fuca Ridge, and in the TAG deposit at the Mid-Atlantic Ridge. Currently, mining...sulphides and vent biota at the crest of the East Pacific Rise at 21◦ N in 1979 (Francheteau et al . 1979;...sulphides including pyrite, sphalerite, and chalcopyrite eventually accumulate at and just below the...The TAG hydrothermal mound at the Mid-Atlantic Ridge at 26◦ N, for example, has a diameter of ca. 200...ca. 50 m and is characterized by a black smoker complex, the top of which consists of several black smokers |  | | 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 |  | | Journal (article/letter/editorial) | | 147 Ž1998. 77–88 Mantle-derived 40Ar in mid-ocean ridge hydrothermal fluids: implications for the source...sulfides from 138N, East Pacific Rise. Fluid inclusion 3 Her4 He are typical of mid-ocean ridge vent fluids implying...The data displays a bimodality similar to mid-ocean ridge basalt ratios. The low Ž4 Her40Ar. mantle volatiles...flux calculated from highly vesiculated mid-ocean ridge basalt Ž1.6–4.2 = 10 7 mol ay1 .. This cannot...Science B.V. All rights reserved. Keywords: East Pacific Rise; Hydrothermal sulfides; He and Ar isotopes; |  | | Book | | 01636083 0 geny G. Gurvich Sediments of the World Ocean Fundamental Theory of Deep-Sea Sedimentation 4V... Gurvich Metalliferous Sediments of the World Ocean Fundamental Theory of Deep-Sea Hydrothermal Sedimentation... Gurvich Metalliferous Sediments of the World Ocean Fundamental Theory of Deep-Sea Hydrothermal Sedimentation...1. Metalliferous sediments from the Southeast Pacific.7 1.1.1. Conditions of formation.7 1.1.2. Lithologic...part of the East Pacific Rise.51 1.3. Metalliferous sediments from the Juan de Fuca Ridge.61 1.4. Metalliferous |  | Badrzadeh, Zahra, Barrett, Timothy J., Peter, Jan M., Gimeno, Domingo, Sabzehei, Mossaieb, Aghazadeh, Mehraj (2011) Geology, mineralogy, and sulfur isotope geochemistry of the Sargaz Cu–Zn volcanogenic massive sulfide deposit, Sanandaj–Sirjan Zone, Iran. Mineralium Deposita, 46 (8) 905-923 doi:10.1007/s00126-011-0357-4 | Journal (article/letter/editorial) | | base, to a pyrite± chalcopyrite-rich central part, and a sphalerite–chalcopyrite-rich upper part, with...main sulfide mineral is pyrite, with lesser chalcopyrite and sphalerite. The feeder zone, comprised of...relationships, the growth history of the Sargaz deposit is complex and includes: (1) early precipitation of sulfides...replacement of pre-existing sulfides 906 by chalcopyrite precipitated at higher temperatures (zone refining);...“refining” led to the dissolution of stage 3 chalcopyrite and formation of a base-metal-depleted pyrite |  | | Report (issue) | | and cubo-octahedra, to 400 µm, intergrown with chalcopyrite; rimming cubanite. Physical Properties: D(calc...303(3) Z = [4/3] X-ray Powder Pattern: East Pacific Rise (21◦ N). 3.059 (100), 1.876 (70), 1.602 (50)...41.15 Total 99.40 100.00 35.43 ◦ (1) East Pacific Rise (21 N); by electron microprobe. (2) CuFe2...pumice from volcanic eruptions. Association: Chalcopyrite, pyrrhotite, pyrite, sphalerite, wurtzite, anhydrite...Distribution: From the East Pacific Rise (21◦ N [TL], 23◦ N, 13◦ N) and the Mid-Atlantic Ridge (14◦ 450 N, 29◦ |  | | Journal (article/letter/editorial) | | Trans-Atlantic Geotraverse (TAG) and Logatchev, Mid-Atlantic Ridge sites (Dekov et al., 2011; Hannington, 1993). It...Logatchev vent field at 14°45’N on the Mid Atlantic Ridge, do not behave as sinks for heavy metals during...hydrothermal field at 26°N on the Mid Atlantic Ridge are Au enriched compared to others in the same area...ecosystems, disperse or accumulate in the wider ocean or ultimately precipitate out elsewhere as oxides...The weathering process of sulphide minerals is complex and varies as a function of primary mineralogy |  | | Report (chapter) | | on May 31, 2015 Venting from the Mid-Atlantic Ridge at 37~ hydrothermal site G. P. K L I N K H A M M...Lucky Strike hydrothermal field on the Mid-Atlantic Ridge (MAR) at 37~ was discovered in 1992 during dredging...out as part of the FARA Program (French-American Ridge Atlantic). The vent field at Lucky Strike lies in...between three cones that form the summit of an axial seamount. The summit rises 400 m above the rift valley...alteration. Hydrothermal fluxes from mid-ocean ridges affect ocean chemistry, the geology and mineralization |  | | Journal (article/letter/editorial) | | sulfide chimneys from the MESO zone, Central Indian Ridge Ute Munch ¨ a a,) , Norbert Blum b, Peter Halbach...activity is fairly well documented from most mid-ocean ridges. However, despite various efforts there is...hydrothermal field recognized so far in the Indian Ocean. Products of former hydrothermal activity were sampled...sampled in the fourth segment of the Central Indian Ridge ŽCIR. north of the Rodriguez Triple Junction ŽRTJ...close to the height of a neovolcanic intrarift ridge. Hydrothermal mineralization is structurally controlled |  | | 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...and often carry high concentrations of copper (chalcopyrite), zinc (sphalerite), and lead (galena) in addition...sulphides, and vent biota at the crest of the East Pacific Rise at 21°N in 19791,2 confirmed that the formation |
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