 | | Journal (article/letter/editorial) | | EpigeneticFeatures in MetalliferousSediment,AtlantisII Deep, Red Sea R. A. ZIERENBERG AND W. C. SHANKS III Universityof...Metalliferoussedimentprecipitatedin the AtlantisII Deep brine poolis finely laminated and undisturbedexceptin...area of the southwest basin.In this part of the Deep massive bedding,resedimentation, and brecciationare...new hot brine ventsinto the Deep. Vein mineralogyisdominatedby anhydrite,talc,smectite,pyrite,sphalerite...depositsand (2) to determine constraints THE AtlantisII Deep is a tectonicdepression within on chemicaland physicalpropertiesof |  | | Journal (article/letter/editorial) | | debris in association with nontronite in the Bauer Deep (~10ÂșS, 102ÂșW). When observed in more detail, he...of 7ÂșC (range 14 4ÂșC) for smectite from the Bauer Deep in the southeast Pacific, which, combined with an... produced a temperature compatible with that of deep ocean waters (3ÂșC). However, McMurtry and Yeh (1981)...for a single nontronite sample of the same Bauer Deep. Most studies have found smectite-formation temperatures...each from a different environment in the Atlantis II Deep (Red Sea). Murnane and Clague (1983) found a temperature |  | | Journal (article/letter/editorial) | | FROM THE ATLANTIS II DEEP, RED SEA Key Words-Atlantis II Deep, Hydrothermal, Iron, Red Sea, Vermiculite...focused on the hot brines and their deposits in the Red Sea, chiefly because of their high content of heavy...a major component of the upper 5 m of the Atlantis II Deep deposits, Smectite, illite, palygorskite,...parts of the hydrothermal deposits from both the Atlantis II and the Discovery Deeps, and a dioctahedral,...Goulart (1976) from the siliceous facies of the Atlantis II Deep. In the course of a detailed mineralogical |  | | Journal (article/letter/editorial) | | fluids and the evolution of the Atlantis II deep hydrothermal system, Red Sea: Strontium isotope study PIERRE...Abstract-Atlantis II is the largest and most mineralized of the deeps along the axis of the Red Sea spreading...They are close to what is found for the present-day deep brine pool (0.707105, 45.10 ppm). The strontium...concentration and the 87Sr/8bSrratio of the Atlantis II Deep brines can be derived from those of the interstitial...hydrothermal activity in the deep in the beginning of the Atlantis II Deep sedimentary history. The strontium |  | Cuadros, Javier, Michalski, Joseph R., Dekov, Vesselin, Bishop, Janice, Fiore, Saverio, Dyar, M. Darby (2013) Crystal-chemistry of interstratified Mg/Fe-clay minerals from seafloor hydrothermal sites. Chemical Geology, 360. 142-158 doi:10.1016/j.chemgeo.2013.10.016 | Journal (article/letter/editorial) | | glauconite-nontronite, talcnontronite and talc-saponite. Some of the talc-saponite samples have Fe contents well...nonexpandable layers (talc and glauconite layers). In talc-nontronite and talc-saponite octahedral Fe...several temperatures. The correlations found for talc-nontronite and glauconite-nontronite samples suggest...perhaps random. The talcnontronite samples have talc layers with cation-deficient octahedral sheets....formation of a range of clay minerals such as talc, disordered talc (kerolite), saponite, nontronite, celadonite |  | | Journal (article/letter/editorial) | | metalliferous and calcareous pelitic sediments of the Red Sea axial trough A. Baumann Zentrallaboratorium fiir...in the axial graben zone of the Red Sea outside the Atlantis II Deep. Hydrothermal metal-rich precipitates...both the normal and hydrothermal sediments of the Red Sea lies within narrow limits, with less variation...Pb isotopes. The Sr-isotope composition of the Red Sea graben sediments is mainly controlled by seawater...brines and metalliferous sediments in the central Red Sea (Miller 1964; Swallow and Crease 1965; Miller et |  | | Journal (article/letter/editorial) | | balances in metalliferous deposits from the Atlantis II Deep, Red Sea PIERRE ANSCHLITZ * Centre de Gdochimie...species within the sedimentary series of the Atlantis II Deep, we have examined the chemical composition...during the last 2,250 years. Assuming that a Salton Sea-like solution supplies all the Fe contained in the...processes acting in the brine system of the Atlantis II Deep. 1. INTRODUCTION 1969; Hackett and Bischoff...sinks, and fluxes of sedimentary material. The Atlantis II Deep is a dynamic system with mineral precipitation |  | | Journal (article/letter/editorial) | | Fractured talc-carbonate rocks delineate the eastern border of the deposit and serpentinites and talc-carbonate...el t FINLAND Melalahti RUSSIA Jormua Baltic Sea 28°E Archean rocks Igneous rocks and gneisses (c...NiâCuâZnâCo mine. Lahnaslampi = LahnaslampiâPunasuo talc-nickel mine. Jormua = ophiolitic rocks at Jormua...Horsmanaho = Horsmanaho talc mine. R2500 = Outokumpu Deep Drill Hole (Kukkonen, 2011). Red lines represent Palaeoproterozoic...Minor occurrences of peridotite, serpentinite and talc-carbonate rocks are found in the area (e.g., Eilu |  | 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) | | minerals are Mg-rich chlorite, variably ferroan talc, (Mg, Si)-rich and (Ca, Na, K)-poor saponite (stevensite)...alteration to chlorite + illite ± actinolite ± saponite ± talc-bearing assemblages and later localized deeper alteration...and mixed ultramaïŹcâmaïŹc breccias were altered to talc-rich rocks with variable amounts of chlorite, carbonate...chlorite and widespread replacement of serpentine by talc. The Ivanovka deposit shows many similarities with...granular pyrrhotite, with or 365 portions of talc, (Ca, Mg, Fe)-carbonates, chlorite, saponite, and |  | | Journal (article/letter/editorial) | | Minato-ku, Tokyo 108-8477, Japan 2 Abstract Fe(II) only occupies octahedral sites in phyllosilicates...octahedral atoms are larger than Al (typically Fe[III], Fe[II], Mg) that produces an expanded structure where tetrahedral...counterparts. Phyllosilicates with significant Fe(II) content, typically trioctahedral, are weathered...phyllosilicates. In a first evaluation, it appears that both Fe(II) and Fe(III) fit better within the larger octahedral...Iron (III) occupies tetrahedral sites, but no Fe(II) has been found so far occupying tetrahedral sites |  | | Journal (article/letter/editorial) | | Abstract From 14 deeps and other regions of the Red Sea totally 226 samples from 28 cores recovered during...goethite in each sample; partly small contents of talc. e) h e a v y m e t a I d e p o s i t s : dominance...goethite de concentration diff6rente et d'un peu de talc de n6oformation. c) B o u e s d e m i n 6 r a i...de min6raux argileux avec silicates authi~bnes (talc, quartz, opale, chrysotile, s6piolite, paligorskite...MHHepaJIOB 3aBHCIIT OT raly6IIHbI CCI1HOJIHThI YIpH O~II~eI~ HeaHaqHTeJIbHOf~ KOHIleHTpalLttII n m p o K o |  | | Journal (article/letter/editorial) | | Griffin Arculus, R.J., E.B. Curran, The genesis of the talc-alkaline rock suite Athavale, R.N., Comments on...Barker, P.F., A spreading centre in the east Scotia Sea Berman, B.L., see Kaiser Black, M.S., see Eisentraut..., see Larson Christensen, N.I., M.H. Salisbury, Sea floor spreading, progressive alteration of layer...15 (1972) 133 stability in H20-undersaturated talc-alkaline melts (1972) (1972) (1972) (1972) (1972)...include terrestrial equivalents of lunar maria? Green II, H.W., S.V. Radcliffe, Dislocation mechanisms in |  | | Book | | SIMON FIâąSER UNIVERSI TY i 111111 1111 II II 3 9345 01636083 0 geny G. Gurvich Sediments of the World...World Ocean Fundamental Theory of Deep-Sea Sedimentation 4V t I 4^ Springer SIMON FRASER UNIVERSITY...Sediments of the World Ocean Fundamental Theory of Deep-Sea Hydrothermal Sedimentation Digitized by the...Sediments of the World Ocean Fundamental Theory of Deep-Sea Hydrothermal Sedimentation With 174 Figures and...SEDIMENTS OF THE RED SEA.127 2.1. Conditions of formation.127 2.2. Atlantis II Deep.134 2.2.1. Spatial-temporal |  | | Journal (article/letter/editorial) | | Santa Olalla, Spain, which is accompanied by some talc and mica, shows a reversible expansion on glycolation...described a hydrothermal clay vermiculite from the Red Sea which partially expanded to 16 A in ethylene glycol...(Mfilaga). All the vermiculites contain small amounts of talc. Only the vermiculite of Santa Olalla is described...vermiculite accompanied by reflections of talc (Fig. 1). Talc is always present but in variable proportions...The iron content is low and about 75 per cent is Fe(II). The approximate structural formula is: 9 . [(A10 |  | | Journal (article/letter/editorial) | | record the hydrothermal activity in Atlantis II Deep sediments (Red Sea). CABANISSS. E. and SHUMANM. S.:... S.: Copper binding by d&solved organic matter-z II. Variation in type and source of organic matter.... and BLOOMERS. H.: The origin of celestite in deep-sea carbonate sediements. l&Es J. S., CRERARD. A....VELDEB.: Experimental pseudomorphism of diopside by talc and serpentine in (Ni,Mg)Clz aqueous solutions....metasomatism beneath Western Victoria, Australia: II. isotopic geochemistry of Cr-diopside lhersolites |  | | Journal (article/letter/editorial) | | supplier of sulfur and organics that can fix metals; (ii) where the dissolving bed is acting as a supplier...are active today beneath the floor of the Atlantis II Deep and are thought to have their ancient counterparts...near-surface and surface settings can then create sea-floor brine lakes and replacement haloes about, or...interaction during burial. For example, chloride-dominated deep brines in the Canning Basin and beneath the modern...metals and is often defined by a colour change from red (oxidised iron) to grey-green (reduced iron). The |  | | Journal (article/letter/editorial) | | formation in the Guaymas Basin and in the Salton Sea, under hundreds of meters of sediments, may be approximate...by "exhalations" of metal-rich solutions on the sea floor. But there are massive sulfides very much larger...abundant venting of mineralized fluids onto the sea floor may not always generate large mineral deposits...modern massive sulfide is perhaps shown by the Red Sea (10 s t) where dispersion is prevented by the high...deposit may have formed slightly below the coeval sea floor, under a thin silica cap. The object of study |  | | Journal (article/letter/editorial) | | 194 www.elsevier.com/locate/chemgeo Deposition of talc â keroliteâsmectite â smectite at seafloor hydrothermal...accepted 21 October 2007 Editor: D. Rickard Abstract Talc, keroliteâsmectite, smectite, chloriteâsmectite...hydrothermal sites have previously been described as talc, stevensite or saponite. In contrast, new data show...tri-octahedral Mg-phyllosilicates ranging from pure talc and Fe-rich talc, through kerolite-rich keroliteâsmectite...perfection of the clay sequence decreases generally from talc to keroliteâsmectite with lower crystalline perfection |  | Gablina, I. F., Popova, E. A., Sadchikova, T. A., Savichev, A. T., Gorâkova, N. V., Osâkina, N. S., Khusid, T. A. (2014) Hydrothermal metasomatic alteration of carbonate bottom sediments in the Ashadze-1 field (13° N Mid-Atlantic Ridge) Geology of Ore Deposits, 56 (5) 357-379 doi:10.1134/s1075701514050043 | Journal (article/letter/editorial) | | and in intraconti nental rifts, e.g., in the Red Sea. Orebearing sedi ments formed under the effect...tions have been studied most completely in the Red Sea Rift Zone (Baturin, 1971; Pushelt and Laschek,...is controlled by intersec tion of the marginal deep fault and the nearlatitudinal tectonic zone. The...and siltâgravelâsand, often unsorted, beige and red brown in the upper part, browngray and bluish gray...olivine; talc, serpentine, and chlorite replace pyroxene and olivine. Secondary minerals (talc, ser pentine |  | | Book | | ii sted fa Neko r eon „. Ae le tre aia mg et i Se LAL bo ee tetsspe Taree evo Saas Âą Portes vo...vo tase reel see ~ To ii | q ORY | eo ir . | U i oto= N= |. trbersi of Strathclyde Glasgow...experience gained during sixteen years of going to sea largely to further the aims of marine mineral programmes...General Introduction Physiographic regions of the sea floor and their mineral potential . Lakes Sources...extraction eaiahismns General appearance . 5.3.1 Deep-sea concretions : 5.3.2 Near-shore and lacustrine |  | | Journal (article/letter/editorial) | | systems in the East African rifts and those of the Red Sea. Geothermal springs in both modern and ancient...play a crucial role in transferring heat from the deep interior of the planet to the surface. This internally...to the surface by conduction, mantle convection (deep mantle plumes, asthenospheric convection) and advection...system are: (i) a heat source and ïŹuid phase(s); (ii) a plumbing system; (iii) and depositional site(s)...surface, whether on land or in bodies of water (lakes, sea ïŹoors) constitute what is commonly called hot or |  | | Journal (article/letter/editorial) | | near the GR-14 area (42.YâN) is more than 3,900 m deep (MALAHOFFet al., 1982). Right lateral offsets at...severalvolcanic cones, fresh pillow flows, sheet flows and deep fissures in pillow lavas indicate recent volcanism...both paiagonatiaed and fresh glass surfaces and red and brown stains of presumably Fe and Mn hydroxides/oxyhy~oxid~...phillipsite, lizudite or kaolinite and trace amounts of talc were also identified in X-ray diffractograms. In...350°C. represents the presence of trace amounts of talc. The absence of this peak in other splits of the |  | 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) | | and deep red layers. Lightcolored (ruddy) layers are domi nated by hematite, and darker (deep red)...horizontal layering, with light (ruddy) and dark (deep red) layers less than 1 cm thick. The hematite and...miner als. It should be noted that, according to deep sea drill ing data, nontronite is absent in ancient...sulfides owing to the infiltration of cold oxidizing sea water into the porous sulfide matrix. Seawater pene...prod ucts of volcanic rocks, such as serpentine, talc, and chlorites (Dias and Barriga, 2006; Dias et |  | | Journal (article/letter/editorial) | | may have had little surficial expression on the sea floor. VMS deposits at spreading centres within oceanic...that the formation of massive sulphide ores on the sea floor is linked to volcanism. His landmark papers...are poorly connected to the open sea, such as the present-day Black Sea (Ozsoy and Unluata 1997), fjords...pool mineralization is the Atlantis II Deep (Miller et al. 1966) in the Red Sea. This deposit is generally...system rather than a volcanogenic one. The Atlantis II Deep IP brine pool contains density-stratified |  | | Report (issue) | | Michael Schulz, and Harlan Spence (Eds.) 160 Earthâs Deep Mantle: Structure, Composition, and Evolution Robert...and Natchimuthukonar Gopalswamy (Eds.) 168 Earthâs Deep Water Cycle Steven D. Jacobsen and Suzan van der...Robert L. Wesson, and Göran Ekström (Eds.) 180 Arctic Sea Ice Decline: Observations, Projections, Mechanisms...and index. ISBN 978-0-87590-478-8 (alk. paper) 1. Sea-floor spreading. 2. Hydrothermal deposits. 3. Chemical...26°N. Photo credit: IMAX film Volcanoes of the Deep Sea, produced by The Stephen Low Company. Reproduced |
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