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| Fe-Mn OXIDES IN THE HYDROTHERMAL SEDIMENTS OF THE RED SEA DEEPS SYSTEM N U R IT T A IT E L -G O LD M A N...Negev, Beer-Sheva, Israel 2 AbstractâDeep sediments from the Red Sea have been studied extensively and provide...comparing the Fe-Mn oxyhydroxides from the southern Atlantis II, Chain A, Chain B, and Discovery Deeps, using...dominated by Si-associated Fe oxides (ferrihydrite, goethite, lepidocrocite, and short-range ordered, rounded...hydrothermal sediments of the SW basin in the Atlantis II Deep, indicating sub-bottom connections between |
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| piston coresfrom the heavy metal depositsin the Atlantis II Deep indicatesthat the facies exhibit considerablygreater...was discoveredin the southwesternpart of the Atlantis II Deep. Nine of the cores bottomed in basaltic bedrock...the Atlantis II Deep of 25,000years. The lowermostunit in the deep is representedby normal Red Sea carbonatesediments...carbonatesediments. Carbonatesedimentation in the Atlantis II Deep was continuousfrom 25,000 to 12,900 years...geothermalactivity. Continuous geothermalactivity in the Atlantis II Deep beganapproximately12,900yearsago, and is continuingtoday |
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| geothermometry and origin of smectites in the Atlantis II Deep, Red Sea T.G. Cole Applied Geochemistry Research...brine pool of the Atlantis II Deep, a localised area of geothermal activity in the Red Sea, comprise a diversity...three cores from the Southwest Basin of the Atlantis II Deep, of the present study, three smectites comprising...[12]) and the temperature of the brine pool in the Deep (about 50-60°C [13,14]). The nontronite formation...focussed on 1. Introduction T h e A t l a n t i s II D e e p is o n e o f s e v e r a l l o c a l i s |
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| 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 |
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| BASE METAL CONTENT IN A CORE FROM THE ATLANTIS II DEEP, RED SEA * R.H. CARWlLE and G. FAURE Department...base metal content in a core from the Atlantis II deep, Red Sea. Chem. GeoL, 8: 15-23. The isotope composition...sediment samples of core 128P from the Atlantis II deep of the Red Sea appears to be very nearly constant...samples have significantly lower 87Sr/a6Sr ratios than sea water, which suggests that the sediment was precipitated...occurrence of hot brines and base metal deposits in the Red Sea has been described in great detail in a book edited |
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| Si-ASSOCIATED GOETHITE IN HYDROTHERMAL SEDIMENTS OF THE ATLANTIS II AND THETIS DEEPS, RED SEA N UR IT T AI...Si-associated goethite from sediments in the Atlantis II and Thetis Deeps in the Red Sea have been investigated...crystallized, and mono-domain, acicular crystals. Goethite crystals with elevated Si/Fe elemental ratios...higher Si/Fe ratios in Atlantis II Deep goethites and the lower ratio in Thetis Deep goethites probably reflect...concentration in the hydrothermal fluids from which goethite precipitated. At relatively low Si/Fe ratios, |
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| IN HYDROTHERMAL SEDIMENTS OF THE ATLANTIS II AND THETIS DEEPS, RED SEA N UR I T T AI TE L G OL DMAN 1,...hydrothermal brines of the Thetis and Atlantis II Deeps in the Red Sea results in markedly different crystals...indicate that the Atlantis II Deep lepidocrocite is less crystalline than the Thetis Deep lepidocrocite....bonds can be detected. The formation of the Atlantis II Deep lepidocrocite is due to fast oxidation of... The blanket-like layer of lepidocrocite in Atlantis II and Thetis Deeps lepidocrocite was probably formed |
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| brines and recent heavy metal deposits in the Red Sea a geochemical and geophysical account Additional...brines and recent heavy metal deposits in the Red Sea, ISBN 978-3-662-27120-9, is available at http://extras...Deposits in the Red Sea Hot Brines and Recent Heavy Metal Deposits in the Red Sea A Geochemical and...scheme. The world-wide interest in rift valleys and sea floor spreading with their attendant hydrothermal...activity can be studied in a miniscale in the Red Sea. The data reported in this book cover both the |
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| 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 |
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| 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 |
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| 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 |
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| PEDLEY, la@), and confirmed in this study, the goethite-water D/H fractionation factor is essentially...initial goethite synthesis experiments conducted at 25âC, 44°C and 62°C. The synthetic goethite â*ao.w...natural goethite sample from the Atlantis II Deep in the Red Sea. These results suggest that goethite can...temperature g~~e~orne~r. Perbaps more importantly, goethite can be used in low temperature, oxygen isotope...most common terrestrial iron (III) oxides are goethite (CC-FeOOH)and hematite (cr-Fe20s)-e.g. JAMES (1966) |
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| S0016-7037(00)00486-5 Geochemical dynamics of the Atlantis II Deep (Red Sea): II. Composition of metalliferous sediment...26, 2000) AbstractâThe Atlantis II Deep is an axial depression of the Red Sea filled with highly saline...mainly the reduction of Mn-oxide with dissolved Fe(II), the recrystallization of primary oxide minerals...1995). New brines have supplied intermittently the deep and have changed the thickness of the brine pool...pool (BaÌcker and Richter, 1973). The Atlantis II Deep is an active hydrothermal system, as demonstrated |
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| of metalliferous sediments in the Atlantis II Deep of the Red Sea: Evidence from rare earth element geochemistry...Abstract The Atlantis II Deep is a brine-ïŹlled depression on the slowly spreading Red Sea rift axis. It...(BIF). The brine pool at the bottom of the Atlantis II Deep creates an environment where most of the hydrothermally...samples from 9 cores in diïŹerent parts of the Atlantis II Deep to better understand the origins of diïŹerent...to the Deep from outside account for most of the REE in the sediments of the Atlantis II Deep, similar |
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| the hydrother~l activity in the Atlantis II Deep sediments (Red Sea) ELISABETHOUDIN' and ALAIN COCHERIEâ...anal* in samples from Atlantis II and Shaban/Jean Charcot Deeps in the Red Sea. The high Zr/Hf ratio...crystallized apatite are the main REE sink in Atlantis II Deep sediments as in other marine environments...early diagenesis.The hying REE signature of Atlantis II Deep fish debris indicate that they probably record...difIerentREE signaturesoftbe Sbaban/Jean Cbarcot and Atlantis II Deep hydrotbertnal sediments suggest a seawater-dominated |
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| isotopes and REE analyses of five cores of the Red Sea: An insight into hydrothermal input M.-C. Pierret...Montpellier Cedex 05, France The formation of the Red Sea was initiated by the separation of the Arabian...and interstitial waters from five cores of the Red Sea sampled during the RedSed cruise in september 1992...from four deeps located on the axial graben (Atlantis II, Thetis, PortSoudan and Suakin), and one at 10...interstitial waters show values similar to those deep water of each site. They are equilibrated with the |
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| Trace metal distribution in the Atlantis II Deep (Red Sea) sediments Tea E. Laurila, Mark D. Hannington...Dieter, Trace metal distribution in the Atlantis II Deep (Red Sea) sediments, Chemical Geology (2014), doi:...MANUSCRIPT Trace metal distribution in the Atlantis II Deep (Red Sea) PT sediments Department of Earth Sciences...tlaurila@geomar.de; Tel: +49 431 600-1431 Abstract The Atlantis II Deep is one of the only locations on the modern...inferred pathways for metal precipitation in the Atlantis II Deep sediments, especially adsorption onto surface-active |
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| GreatBrltaln Ore transport and deposition in the Red Sea geothermal system: a geochemical model WAYNEC....distribution of dissolved aqueous species in the Red Sea geothermal brine provides a model of ore transport...base metal sulfides, anhydrite, and barite. The Red Sea brme is recirculated seawater that acquires high...sutide and metals are carried together into the Atlantis II Deep. Below 150°C the brine becomes supersaturated...metalliferous sediments in the axial rift zone of the Red Sea provide a modern analogy for many ancient hydrothermal |
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| analogous to those currently active in the Atlantis II Deep of the Red Sea. Silicarich, hypersaline brines discharged...discharged through fractures in the sea floor and ponded in a local basin. Epiosodic influx of clastic...probably [rose along numerous shear zones from] a deep seated source." They further stated that "replacement...coarse grained quartz of brownish colour, mixed with red and brown oxide of iron and a little mica" (American...exposed along the main trench. Brown, orange and red iron stained laminations up to 1 cm wide define original |
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| hydrothermal convection systems involvingthe circulation of seaâąvaterthroughoceanic crustand uppermantleat oceanicspreadingcenters...certainislandsand continentsas ophiolites(Fig. 1). normal sea water over wide areas of ocean basins The metall...rift zone, exemplifiedby the axial troughof the Red Sea, to an oceanicridge,exemplifiedby the Mid-Atlantic... 1974; Deep Sea Drilling Staff, 1977). 138 PETER .4. RO.,V.4 rl'AmâąE2. Half-rate of sea-floor Location...Mid-Atlantic Ridge at latitudes llĂžN zone 1.1-1.5 Goethite, iron-rich montmorillonite (smectite), manganesehydroxyoxides |
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| accepted in revisedform October 3 I, 1984) Abstract-Goethite samples analyzed for this study have a 60 range...positive &Dvalues are from marine environments. Goethite-water equilibrium D/H Fractionation factors measured...all three temperatures. These data suggest that goethite 6D values may be a direct, temperature-independent...of the waters with which the goethite last ~uilibmt~. Most of the goethite dD values in this study reflect...origin. Substitution of Mn and/or Ai for Fe in the goethite structure may affect the mineral-water fractionation |
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| Printed in The Netherlands 259 [3] A POSSIBLE GOETHITE-IRON(III) CARBONATE SOLID SOLUTION AND THE DETERMINATION... 1987) Abstract Yapp, C.J., 1987. A possible goethite-iron (III ) carbonate solid solution and the determination...data suggest that a solid solution between goethite and iron (II[) carbonate may exist in natural samples...C02 and isotopic temperature data for a natural goethite from a documented marine environment, as well...Thus, although the calibration of the proposed goethite-iron (III) carbonate Pco~ indicator is tentative |
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| relations of copper-iron sulfides in the Atlantis II deep, Red Sea E. Missack t, p. Stoffers 2 and A. El...hydrothermally active, southwest basin of the Atlantis II deep, Red Sea. The most abundant sulfide phases are...for the first time as a natural mineral in Atlantis II, Red Sea. Yet its existence as a novel phase needs...investigations indicate that the formation of Atlantis II deposits is a result of complex processes. These...sediments related to hot brines were discovered in the Red Sea in 1964 (Miller et al. 1966). Since then, several |
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| [XLeP] Superheating in the Red Sea? The heat-mass balance of the Atlantis II Deep revisited C. R a m b o...November 9, 1989 Atlantis II is the only hydrothermally active of the five Central Red Sea deeps, hot new... Hydrological and geochemical data on the Atlantis II Deep show that, between 1965 and 1977, only negligible...of lower brine have spilled over towards Chain A Deep and that, in contrast, the lower brine component...significantly. The heat-mass balance of the Atlantis II Deep lower brine between 1966 to 1977 is considered |
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| SETTLING OF METALLIFEROUS SEDIMENTS IN THE ATLANTIS-II DEEP (RED SEA). ANSCHUTZ P. *, BLANC G. *, FRITZ B...metalliferous muds system of the Atlantis II deep, located on the Red Sea axial zone. These muds are overlain...accumulation and the conservation of sediments in the Atlantis II deep. RESULTS The material was sampled during the...element in the metalliferous sediments of the Atlantis II deep. The bottom of the core sampled in the W basin...of this zone, these sediments are cut by oxide (goethite) intercalations. Sulfide minerals become the most |
