 | Sun, Zhilei, Zhou, Huaiyang, Yang, Qunhui, Sun, Zhixue, Bao, Shenxu, Yao, Huiqiang (2011) Hydrothermal FeāSiāMn oxide deposits from the Central and South Valu Fa Ridge, Lau Basin. Applied Geochemistry, 26 (7) 1192-1204 doi:10.1016/j.apgeochem.2011.04.008 | Journal (article/letter/editorial) | | oxide deposits from the Central and South Valu Fa Ridge, Lau Basin Zhilei Sun a,b,c, Huaiyang Zhou a,d,ā...ļ¬eld (MHF) in the Central and Southern Valu Fa Ridge (VFR), Lau Basin were examined to explain the source...collected from two hydrothermal ļ¬elds along the same ridge (now in different developmental stages). The aim...1192ā1204 2. Geological setting The Lau Basin is a wedge-shaped, back-arc basin located in the SW Paciļ¬c Ocean...Ocean, just west of the Tonga Trench. About 5.5 Ma ago, true back-arc spreading began and propagated southwards |  | Vallier, T.L., Jenner, G.A., Frey, F.A., Gill, J.B., Davis, A.S., Volpe, A.M., Hawkins, J.W., Morris, J.D., Cawood, P.A., Morton, J.L., Scholl, D.W., Rautenschlein, M., White, W.M., Williams, R.W., Stevenson, A.J., White, L.D. (1991) Subalkaline andesite from Valu Fa Ridge, a back-arc spreading center in southern Lau Basin: petrogenesis, comparative chemistry, and tectonic implications. Chemical Geology, 91 (3) 227-256 doi:10.1016/0009-2541(91)90002-9 | Journal (article/letter/editorial) | | Subalkaline andesite from Valu Fa Ridge, a back-arc spreading center in southern Lau Basin: petrogenesis, comparative...Subalkaline andesite from Valu Fa Ridge, a back-arc spreading center in southern Lau Basin: petrogenesis, comparative...two sites on Valu Fa Ridge (VFR), a back-arc spreading center in Lau Basin. Valu Fa Ridge, at least 200...discontinuouslyfor about 100 km along the ridge axis, lie 3-4 km beneath the ridge. The mostly aphyric and glassy...the VFR lavas have both volcanic arc and back-arc basin affinities. The volcanic arc characteristics are: |  | Fouquet, Yves, von Stackelberg, Ulrich, Charlou, Jean Luc, Erzinger, Joerg, Herzig, Peter M., Muehe, Richard, Wiedicke, Michael (1993) Metallogenesis in back-arc environments; the Lau Basin example. Economic Geology, 88 (8) 2154-2181 doi:10.2113/gsecongeo.88.8.2154 | Journal (article/letter/editorial) | | 2154-2181 Metallogenesis in Back-ArcEnvironments' The Lau BasinExample YVESFOUQUET, IFREMER, Centre de Brest...hydrothermal activityon a modernback-arcvolcanicridge,the Valu Fa Ridge.Three majorhydrothermalfields(Hine Hina,...the developmentof sulfidemounds. Vent fluidsat Valu Fa havemuchhighermetalcontentsthanthoseat midoceanridges...54-2854.00 2154 BACK-ARC ENVIRONMENTS: LA U BASIN 215 5 17Ćø30'S and 19Ćø20' S, locatedat the centralpart...there have been a number of Sand22Ćø50' S (ValuFa Ridge),located75 km closer investigations of hydrothermalprocesses |  | Sun, Z., Zhou, H., Glasby, G. P., Sun, Z., Yang, Q., Yin, X., Li, J. (2013) Mineralogical characterization and formation of Fe-Si oxyhydroxide deposits from modern seafloor hydrothermal vents. American Mineralogist, 98 (1) 85-97 doi:10.2138/am.2013.4147 | Journal (article/letter/editorial) | | precipitates from hydrothermal fields of the Valu Fa Ridge, Lau Basin, especially the role that the neutrophilic...Precambrian banded iron formations (BIF). Keywords: Lau Basin, hydrothermal Fe-Si oxides, banded iron formations...Sometimes crystalline iron-rich silicates such as nontronite are also found in these precipitates. Fe-Si oxide...precipitates from the hydrothermal fields of the Valu Fa Ridge, Lau Basin. Specifically, we have used XRD, scanning...implications for BIF formation. Geological setting The Lau Basin is a triangular depression over 1000 km long and |  | Herzig, Peter M., Hannington, Mark D., Fouquet, Yves, von Stackelberg, Ulrich, Petersen, Sven (1993) Gold-rich polymetallic sulfides from the Lau back arc and implications for the geochemistry of gold in sea-floor hydrothermal systems of the Southwest Pacific. Economic Geology, 88 (8) 2182-2209 doi:10.2113/gsecongeo.88.8.2182 | Journal (article/letter/editorial) | | 2182-2209 Gold-RichPolymetallicSulfidesfrom the Lau BackAre andImplicationsfor the Geochemistry of Gold...Polymetallicsulfidesrecoveredfromthe Valu Fa Ridgein the southernLau basin(southwestPacific)havegoldcontentsof...occurrenceof visiblegoldin sulfidechimneysfromthe Lau basinprovidesa unique opportunityto specifyin detailthe...0361-0128/93/1.526/2182-2854.00 2182 Au-RICH SULFIDES FROM LAU BACK ARC 9,183 H2S.Earlier,subsea-floor boilingandprecipitationof...ascending hydrothermalfluids. Sulfidedepositsin the Lau basinand elsewherein the southwestPacificare strikingly |  | Fouquet, Y., Pelleter, E., Konn, C., Chazot, G., DuprĆ©, S., Alix, A.S., ChĆ©ron, S., Donval, J.P., Guyader, V., Etoubleau, J., Charlou, J.L., Labanieh, S., Scalabrin, C. (2018) Volcanic and hydrothermal processes in submarine calderas: The Kulo Lasi example (SW Pacific) Ore Geology Reviews, 99. 314-343 doi:10.1016/j.oregeorev.2018.06.006 | Journal (article/letter/editorial) | | the transition between the northern end of the Tonga Trench and the North Fiji fracture zone, where tectonic...oriented volcanic graben and the N-S oriented Alofi ridge. In 2010, the active volcano Kulo Lasi, which represents...lava with no obvious geochemical affinity with the Tonga subduction that occurs 500 km to the east. The central...al. , 2001, Leybourne et al. , 2012a), in the Lau Basin (Baker et al. , 2010, Baker et al. , 2006, Bertine...2007, Von Stackelberg, 1988)}, in the North Fiji Basin (Auzende et al. , 1995, Bendel et al. , 1993, Halbach |  | Josso, P., Pelleter, E., Pourret, O., Fouquet, Y., Etoubleau, J., Cheron, S., Bollinger, C. (2017) A new discrimination scheme for oceanic ferromanganese deposits using high field strength and rare earth elements. Ore Geology Reviews, 87. 3-15 doi:10.1016/j.oregeorev.2016.09.003 | Journal (article/letter/editorial) | | the East Pacific rise (EPR) or the Mid-Atlantic Ridge (MAR) [Barret and Jarvis, 1988; Goulding et al....fracture zone, the active Tonga and Vanuatu subduction zones and associated Lau and North Fiji back-arc...crusts are crosscut by Fe-Si precipitates displaying ridge or vein-like structures up to 1 m high [Pelleter...these crusts as Mn oxyhydroxides, Fe oxides and nontronite cementing basaltic pyroclastic facies and brecciated...with the presence of discrete goethite grains. Nontronite, the ferrous end-member of dioctahedral smectite |  | | Report (chapter) | | western Woodlark Basin (initial rifting of continental crust) and eastern Manus Basin (rifted arc crust)...eastern Marius basin, en echelon felsic and mafic volcanic ridges have formed in a pull-apart basin of the rifted...prominent 20 km long and 250-350 m high volcanic ridge. The ridge is andesitic in its lower reaches, dacitic...tectonic settings (continental margin, mid-ocean ridge, back-arc, within-arc, forearc and intraplate seamounts)...western Pacific, the western Woodlark Basin and eastern Manus Basin, From PARSON,L. M., WALKER,C. L. & |  | Pelleter, Ewan, Fouquet, Yves, Etoubleau, JoĆ«l, Cheron, Sandrine, Labanieh, Shasa, Josso, Pierre, Bollinger, Claire, Langlade, Jessica (2017) Ni-Cu-Co-rich hydrothermal manganese mineralization in the Wallis and Futuna back-arc environment (SW Pacific) Ore Geology Reviews, 87. 126-146 doi:10.1016/j.oregeorev.2016.09.014 | Journal (article/letter/editorial) | | highly variable amount of amorphous silica and/or nontronite. They usually exhibit low to very low D metals...zone, the active Tonga-Kermadec subduction zone and ACCEPTED MANUSCRIPT the related Lau and North Fiji...This situation between the northern end of the Tonga trench and the regional Fiji transform fault account...centers such as the FUTUNA and ALOFI IP oceanic ridge (Fouquet et al., 2015; Pelletier et al., 2001)(Fig...spreading segments. The opening rate of this oceanic ridge has been estimated at 4cm/yr from the interpretation |  | | Journal (article/letter/editorial) | | Fe-Mn oxide from the active Lau Basin back-arc spreading axis (Valu Fa Ridge) has an %r/*%r ratio with...One crust from an off-axis seamount west of Gorda Ridge may have begun p~ipi~ting hy~~eneti~y at 0.5 Ma...seamounts and ridges (Marshall Islands, Necker Ridge, and the Musician Seamounts) that are sites of hydrogenetic...precipitation of Fe-Mn oxides, a back-arc spreading ridge (Lau basin) that is a site of hydrothermal precipitation...an off-axis seamount adjacent to Gorda spreading ridge and a volcanic island arc (Mariana Islands) that |  | | Report (chapter) | | Ferromanganese crusts recovered from a spreading ridge north of the Rodriguez Triple Junction in the Indian...spreading centres (mid-Atlantic Ridge, Scott et al. 1974; the Galapagos Ridge, Moore & Vogt 1976; Corliss...Explorer Ridge, Grill et al. 1981; in volcanic arc-back-arc basin settings (Tonga-Kermedec Ridge, Cronan...Manus Basin, Bolton et al. 1988; Lau Basin, Hein et al. 1990; Herzig et al. 1990; North Fiji Basin, Murphy...serious effort to explore the mid-Indian Oceanic ridge for hydrothermal activity (Herzig et al. 1988; Rao |  | Altherr, Rainer, Soder, Christian, Panienka, Sandra, Peters, Daniel, Meyer, Hans-Peter (2013) Pink manganian phengite in a high P/T meta-conglomerate from northern Syros (Cyclades, Greece) Contributions to Mineralogy and Petrology, 166 (5) 1323-1334 doi:10.1007/s00410-013-0929-7 | Journal (article/letter/editorial) | | todorokite, birnessite, amorphous silica (opal-A) and nontronite. Al/(Al ? Fe ? Mn) ratios of 0.355 and 0.600...deposits contain Fe-rich phyllosilicates such as nontronite, Na0:3 Fe3Ć¾ 2 Ć°Si; AlĆ4 O10 Ć°OHĆ2 3H2 O...precipitate (e.g., Sun et al. 2012). Quite often, nontronite is accompanied by feroxyhyte (d-FeOOH), ferrihydryte...(1973) The origin and fate of ferromanganoan active ridge sediments. Stockholm Contrib Geol 27:149ā243 Brady...manganese mineralization along the active Mariana and southern Izu-Bonin arc system, western Pacific. J Geophys |  | Liu, Deng, Wang, Fengping, Dong, Hailiang, Wang, Hongmei, Zhao, Linduo, Huang, Liuqin, Wu, Lingling (2016) Biological reduction of structural Fe(III) in smectites by a marine bacterium at 0.1 and 20 MPa. Chemical Geology, 438. 1-10 doi:10.1016/j.chemgeo.2016.05.020 | Journal (article/letter/editorial) | | different iron contents (montmorillonite SWy-2 and nontronite NAu-2) as the sole electron acceptor, and a marine...Na-montmorillonite (SWy-1) to 4.2 mmol Fe(III)/g for nontronite (NAu-2) (Zhang et al., 2007a). Structurally-coordinated...were selected: Wyoming montmorillonite SWy-2 and nontronite NAu-2. These two samples have a similar structure...with time in montmorillonite SWy-2 (A, C) and nontronite NAu-2 (B, D) reactors due to bioreduction in...illite particles (particles c & d in Fig. 9C), nontronite aggregates (Fig. 9D), and rhombohedral calcite |  | Hodkinson, R.A., Stoffers, P., Scholten, J., Cronan, D.S., Jeschke, G., Rogers, T.D.S. (1994) Geochemistry of hydrothermal manganese deposits from the Pitcairn Island hotspot, southeastern Pacific. Geochimica et Cosmochimica Acta, 58 (22) 5011-5029 doi:10.1016/0016-7037(94)90228-3 | Journal (article/letter/editorial) | | most trace element poor crusts from mid-oceanic ridge environments. REE data suggest that these crusts...Mn crusts between midplate hotspot, mid-oceanic ridge, island arc, and back-arc environments may be influenced...isolated occurrences of friable, pale yellow nontronite. STOFFERS et al. ( 1990a) suggest that volcano...frequency described in mid-oceanic ridge (MOR), island arc, and back-arc basin environments, have rarely been...bound Mn deposit from the South Johnston Island Ridge and, based on chemical data, concluded that it contained |  | Hein, James R, Hsueh-Wen, Yeh, Gunn, Susan H, Gibbs, Ann E, Chung-ho, Wang (1994) Composition and origin of hydrothermal ironstones from central Pacific seamounts. Geochimica et Cosmochimica Acta, 58 (1) 179-189 doi:10.1016/0016-7037(94)90455-3 | Journal (article/letter/editorial) | | mid-Atlantic Ridge, East Pacific Rise-Galapagos Ridge, Explorer-Got&-Juan de Fuca Ridges, mid-Indian Ridge, and...have reported on hydrothermal deposits at backarc basin spreading centers (e.g., HALBACHet al., 1989; HERZIG...reported occurrences consist of iron silicate (nontronite) and iron oxyhydroxide deposits of small size...were collected. 1) Horizon Guyot is a volcanic ridge of Late Cretaceous age (about 88 m.v. old: S~HLANGER...Island Ridge, which connects Johnston Island to the NW trending Johnston Seamount Group (Keli Ridge) to |  | Rusakov, V. Yu., Ryzhenko, B. N., Roshchina, I. A., Kononkova, N. N., Karpukhina, V. S. (2015) Devonian ore clastic turbidites of the Molodezhnoe massive copper sulfide deposit, Southern Urals. Geochemistry International, 53 (7) 624-647 doi:10.1134/s0016702915070095 | Journal (article/letter/editorial) | | the Molodezhnoe Massive Copper Sulfide Deposit, Southern Urals V. Yu. Rusakov, B. N. Ryzhenko, I. A. Roshchina...the Molodezhnoe massive copper sulfide deposit, Southern Urals. They are inter preted to be accumulated...isotopes, fluid inclusions, massive sulfide deposits, Southern Urals DOI: 10.1134/S0016702915070095 INTRODUCTION...cluster located at 13Ā°30ā² N of the MidAtlantic Ridge (MAR) during cruise 32 of the R/V Professor Ligachev...1). Molodezhnoe massive copper sulfide deposit (Southern Urals). MATERIALS HoloceneāPleistocene Turbidites |  | Binns, R. A., Scott, Steven D., Bogdanov, Y. A., Lisitzin, A. P., Gordeev, V. V., Gurvich, E. G., Finlayson, E. J., Boyd, T., Dotter, L. E., Wheller, G. E., Muravyev, K. G. (1993) Hydrothermal oxide and gold-rich sulfate deposits of Franklin Seamount, western Woodlark Basin, Papua New Guinea. Economic Geology, 88 (8) 2122-2153 doi:10.2113/gsecongeo.88.8.2122 | Journal (article/letter/editorial) | | sevenlongduration dives in the western Woodlark basin, four climbed Franklin Seamount from different directions...Dobu Seamountin ther an interarc nor a back-arc basin. Rather, its of microplaterotathefarwest(Fig.2)...nt(Fig. 2; Binnsand northwest-trendingvolcanic ridge itself 600 m Whirford,1987).AlthoughPACLARKsurveys... neovolcanic zone of the Woodlark the East basin observedno focusedhydrothermal spreadingaxis.FranklinSeamountis...interarc structure,but Davies et al. (1984) lark basin. stressed thattheWoodlarkandPocklington Risesare |  | | Journal (article/letter/editorial) | | analogues in the Red Sea. Diagenetic minerals include nontronite, greenalite, stilpnomelane, magnetite, manganosiderite...MnāFeāP shuttle and redox processes in a stratified basin with oxic or suboxic shallow waters and silica concentrations...seawater . REE . Hydrothermal plume . Greenalite . Nontronite Introduction Editorial handling: P. Eilu Electronic...for use in evaluating the redox states of local basin waters and pore fluids during their deposition....suggesting deposition in a deep-marine, sediment-poor, ridge-crest setting. The CuāZnāpyrite VMS deposit at LĆøkken |  | | Journal (article/letter/editorial) | | active hydrothermal site from the Mid-Atlantic Ridge and demonstrate extreme REE variability over short...an active hydrothermal site on the Mid-Atlantic Ridge. Early work at the Trans-Atlantic Geotraverse ŽTAG...hydrothermal input. Many of the processes studied at ridge axes must also be important in these distal areas...3387-R1b 3423-R-33b 3423-nontronite Mean Pacific hydrogenous crusts c Valu Fa ridge hydrothermal crusts c...c Mineralogy Fe Ž%. Mn Ž%. Nontronite Birnessite Birnessite Amorphous Amorphous X-ray amorphous oxides |  | | Journal (article/letter/editorial) | | Hekinian et al., 1993), Explorer Ridge (Grill et al., 1981), the Mid-Atlantic Ridge (MAR) (Scott et al., 1974;...Southwest Indian Ridge (SWIR) (Peng et al., 2011; Sun et al., 2015), the Mohns Ridge (Pedersen et al....volcanoes from off-axis settings along the Juan de Fuca Ridge and EPR (Grill et al., 1981; Alt, 1988; Juniper...also contain Fe-rich phyllosilicates such as nontronite (De Carlo et al., 1983; Alt, 1988; Dekov et al...in H2S, rendering Loihi distinct from mid-ocean ridge hydrothermal systems (Karl et al., 1988; Sedwick |  | Chen, Ping, Chen, Tianhu, Xie, Qiaoqin, Xu, Liang, Liu, Haibo, Zhou, Yuefei (2018) Mineralogy and geochemistry of limonite as a weathering product of ilvaite in the Yeshan iron deposit, Tongling, China. Clays and Clay Minerals, 66 (2) 190-207 doi:10.1346/ccmn.2018.064102a | Journal (article/letter/editorial) | | Al-poor and Fe-enriched clay minerals, such as nontronite, have been found extensively in weathered basalt...al., 1984); furthermore, studies of synthetic nontronite have indicated that the experimental conditions...it is probably not suitable for the growth of nontronite. Opal cannot form either because the existence...ernat ional, 41, 10915 10922. Harder, H. (1976) Nontronite synthesis at low temperatures. Chemical Geology... Heller-Kallai, L., and Szafranek, D. (1984) Nontronite in a deep-sea core from the south pacific. Clays |  | Linsy, P., Prakash, L. Surya, Roy, Parijat, Shuhail, Muhammad, Kurian, P. John (2023) Geochemical Characteristics of Iron in a Sediment Core at 63Ā°40ā² E, Eastern Southwest Indian Ridge: Implications on Regional Hydrothermal Activities and Source Origin. Minerals, 13 (2) 209 doi:10.3390/min13020209 | Journal (article/letter/editorial) | | Sediment Core at 63ā¦ 400 E, Eastern Southwest Indian Ridge: Implications on Regional Hydrothermal Activities...core collected from the eastern Southwest Indian Ridge (SWIR) to understand the iron association in individual...sediments; iron speciation E, Eastern Southwest Indian Ridge: Implications on Regional Hydrothermal Activities...encrustations of ultraslow spreading Southwest Indian Ridge (SWIR) have mainly focused Minerals 2023, 13, 209...the SWIR. Therefore, in order to understand the Ridge source characteristics sedicrustations of ultraslow |  | | Journal (article/letter/editorial) | | the Upper Silesia. 1369 Two modes of change in Southern Ocean export production over the past million...from surface waters of the Antarctic Zone of the Southern Ocean decreased during the last ice age, coinciding...view that the combination of these two modes of Southern Ocean change determines the temporal structure...Abstracts Geochemical variations in the Central Southern Volcanic Zone, Chile (38-43Ā°S): The role of fluids...and SrNd-Pb-Hf-O isotope data from the Central Southern Volcanic Zone in Chile (CSVZ; 38-43Ā°S). The satellitic |  | | Journal (article/letter/editorial) | | derived from the diagenetic dissociation of Al-poor nontronite into iron hydroxide and amorphous silica (Lascelles...BIFs across the ocean basin. 6Fe2z z8SiO2 z2H2 O?Fe6 Si8 O18 Ć°OHĆ4 (1) nontronite Slumping of the mound...largely of colloidal goethite and Al-poor Fe3z nontronite with relatively minor sulphides concentrated...sedimentary basins on ocean crust. 7. Deepening of basin initiates depression of the ocean crust folding...Regional and thermal metamorphism and folding of the basin contents was followed by uplift to form an orogenic |  | Chen, Xian, Sun, Xiaoming, Wu, Zhongwei, Wang, Yan, Lin, Xiao, Chen, Hongjun (2021) Mineralogy and Geochemistry of Deep-Sea Sediments from the Ultraslow-Spreading Southwest Indian Ridge: Implications for Hydrothermal Input and Igneous Host Rock. Minerals, 11 (2) 138 doi:10.3390/min11020138 | Journal (article/letter/editorial) | | Sediments from the Ultraslow-Spreading Southwest Indian Ridge: Implications for Hydrothermal Input and Igneous...Sediments from the Ultraslow-Spreading Southwest Indian Ridge: Implications for Hydrothermal Input and Igneous...collected from the ultraslow-spreading Southwest Indian Ridge (SWIR) were studied by high-resolution XRD, SEM-EDS...products, and diagnostic mineral tracers (e.g., nontronite, SiO2(bio) , olivine, serpentine, talc, sepiolite...hydrothermal input. Keywords: Southwest Indian Ridge; surface sediment and hydrothermal-derived deposit; |
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