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  • 1
    Online Resource
    Online Resource
    Peinture Secrète et Sacrée : L'ocre. (2018)
    Les Ulis :EDP Sciences,
    Details
    Keywords: Electronic books.
    Description / Table of Contents: No detailed description available for "Peinture secrète et sacrée : l'ocre".
    Type of Medium: Online Resource
    Pages: 1 online resource (89 pages)
    Edition: 1st ed.
    ISBN: 9782759822546
    Series Statement: Terre à Portée de Main Series
    URL: https://ebookcentral.proquest.com/lib/geomar/detail.action?docID=5353233
    Language: French
    Note: Peinture secrète et sacrée : l'ocre -- Remerciements -- Sommaire -- Introduction -- 1. Une peinture, l'ocre -- Une peinture -- L'ocre : couleur ou matière ? -- D'où vient tout ce fer ? -- Les minéraux de l'ocre -- 2. Formation -- Ocres d'origine hydrothermale -- Ocres d'origine tropicale -- Ocres d'origine biologique (bactérienne) -- Formation par remobilisation -- Formation des ocres de France -- 3. Gisements et exploitation -- Les premières exploitations -- Les ocres du Berry et de Bourgogne -- Sud-Est de la France -- Autres gisements -- Dordogne -- Pyrénées -- Alsace -- Massif central -- De l'extraction au produit fini -- Le lavage -- De l'ocre jaune à l'ocre rouge -- Devenir des sites ocriers -- Un nouvel intérêt pour les ocres -- 4. Utilisations -- L'ocre depuis quand ? -- Pour les soins -- Peau et médications -- Cuir -- Pour son pouvoir colorant -- Pariétale* -- Peinture -- Écriture -- Autres usages -- 5. L'ocre dans les mythes, les religions et l'art -- Le culte des morts -- L'ocre comme substitut du sang -- Danse -- Glossaire -- Bibliographie -- Index.
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    GEOMAR EBL
  • 2
    Electronic Resource
    Electronic Resource
    Extensive carbonate algal bioherms in upper Pleistocene saline lakes of the central Altiplano of Bolivia (1996)
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 43 (1996), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: During the upper Pleistocene the Central Altiplano of Bolivia was repeatedly flooded by deep and extensive saline lakes in response to climatic fluctuations. Development of carbonate algal bioherms took place during at least three major periods of lacustrine highstands, discontinuously covering the 300-km-long and 100-km-wide lacustrine slopes and terraces up to an elevation of 100 m above the surface of the modern halite crust of Uyuni. Distribution, size and shape of the bioherms are diverse due to various factors, e.g. the nature and morphology of the substrate and the hydrodynamic conditions that prevailed during growth. On larger palaeoterraces, the build-ups coalesced to form platform-like carbonate accumulations. Although the morphologies closely resemble those induced by cyanobacteria, they were predominantly constructed by other plant communities, probably dominated by filamentous green algae. Cyanobacterial communities flourished in association with these plants, but they did not contribute significantly to the architecture of the bioherms; they participated to encrust the plant stems and algal bushes or to form thin laminated layers covering the build-ups. A prominent feature of some bioherms is their composite structure due to repeated algal growth during successive lacustrine episodes that were separated by subaerial exposures with moderate erosional effects. The build-ups located between 3660 and 3680 m elevation display up to three major parts: (1) a massive inner core formed during an early Minchin highstand, before 40 ka; (2) a large peripheral envelope deposited at about 40 ka (late Minchin) and (3) a thinner outermost crust formed during a late glacial event. Lake level dropped during interlacustrine stages, sometimes leading to desiccation and deposition of salt layers in the deepest parts of the system, i.e. the present-day salar of Uyuni.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3091.1996.tb01514.x
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Deep-water resedimentation of anhydrite and gypsum deposits in the Middle Miocene (Belayim Formation) of the Red Sea, Egypt (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 42 (1995), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: The Middle Miocene evaporites in the Red Sea rift were deposited within a complex system of fault-bounded basins that were episodically active during sedimentation. Such a tectonic framework is known to be highly favourable to resedimentation processes. An offshore petroleum well in the north-western Red Sea has cored, below a massive salt unit, an anhydrite-bearing succession which provides an excellent opportunity to study the processes of gravity induced redeposition of Ca-sulphates in a deep basin. Anhydrite deposits, interbedded with siliciclastic layers and thin halite layers, are composed of resedimented facies ranging from fine-grained laminated sediments to coarse-grained breccias. The components derive from the reworking of shelf sediments deposited initially in shallow water to supratidal settings on the surface and edges of structural highs bordering depressions: proximal siliciclastic deposits with interstitial anhydrite (cement patches, nodules) or gypsum and dolostones with early diagenetic anhydrite facies (nodular, chicken-wire) formed in sabkha conditions, interstitially grown gypsum crystals and subaqueous gypsum crusts precipitated in hypersaline ponds, and diatom-rich oozes formed in marine, shallow-water conditions. The homogeneity of the stable isotope composition and petrography of sulphates argue for the initial crystallization of Ca-sulphates within brines of the same origin and in closely interconnected sedimentary settings. The unconsolidated sediments redeposited as slope-foot accumulations were carried both as anhydrite (nodules, soft masses, various fragments, individual grains or crystals released by disintegration of large masses) and gypsum (crystalline aggregates or single crystals) later converted to anhydrite during burial. Layers of chaotic breccia are interpreted as the result of seismic events, whereas the fine-grained deposits could be related to redistribution by nepheloid layers of suspensions of finer grains released by disintegration of the soft anhydrite masses during downslope transport, or of in situ deposits removed by the turbiditic flows.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3091.1995.tb02102.x
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    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Authigenic natroalunite in middle Miocene evaporites from the Gulf of Suez (Gemsa, Egypt) (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Sedimentology 34 (1987), S. 0 
    Details
    ISSN: 1365-3091
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences
    Notes: This paper deals with a new occurrence of sedimentary natroalunite (Na, K) Al3, (SO4)2 (OH)6, in the caprock of a diapir of middle Miocene evaporites from the Gemsa peninsula, located on the southwestern coast of the Gulf of Suez. Field observations, petrographic examinations and stable isotope (18O, 34S) measurements on the associated authigenic phases of anhydrite and native sulphur argue for the genesis of natroalunite at a rather high temperature (i.e. higher than 75°C) by the reaction of clay minerals with sulphuric acid. The sulphuric acid was produced by the concatenation of the following reactions which are thought to increase the diagenetic temperature: bacterial reduction of sulphate evaporites, and oxidation of hydrogen sulphide to native sulphur and sulphate where aerated conditions prevailed in the pore fluids. These changes through time from reducing to oxidizing diagenetic conditions were controlled by the progressive uplift of the diapiric system toward the land surface so that the draining ground waters became progressively oxygenated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3091.1987.tb00804.x
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    Paper (German National Licenses)
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  • 5
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    Mineralogy and stable isotopic composition of carbonates and sulfide minerals from ODP Leg 164 sites (2000)
    PANGAEA
    In:  Supplement to: Pierre, Catherine; Rouchy, Jean Marie; Gaudichet, Annie (2000): Diagenesis in the gas hydrate sediments of the Blake Ridge: mineralogy and stable isotope compositions of the carbonate and sulfide minerals. In: Paull, CK; Matsumoto, R; Wallace, PJ; Dillon, WP (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 164, 1-8, https://doi.org/10.2973/odp.proc.sr.164.226.2000
    Details
    Publication Date: 2024-01-09
    Description: During Ocean Drilling Program Leg 164, gas hydrates were recovered in the Blake Ridge where the top of the gas hydrate zone lies at about 200 meters below seafloor (mbsf) and the bottom-simulating reflector (BSR) is located at about 450 mbsf. There is no sedimentological discontinuity crossing the BSR. The BSR is disrupted by the salt piercement of the Cape Fear Diapir. The authigenic carbonates (dolomite and siderite) are always present in small amounts (a few weight percent) in the sediments; they are also concentrated in millimeter- to centimeter-sized nodules and layers composed of dolomite above the top of the gas hydrate reservoir, and of siderite below the BSR. In the Blake Ridge, the dolomite/siderite boundary is located near 140 mbsf. The distribution with depth of the d18O values of dolomite and siderite shows a sharp decrease from high values (maximum 7.5 per mil) in the topmost 50 m, to very low values (minimum -2.7 per mil) at 140 mbsf, and at greater depth increase to positive values within the range of 1.8 per mil to 5.0 per mil. The d13C distribution is marked by the rapid increase with greater depth from low values (-31.3 per mil to -11.4 per mil) near 50 mbsf to positive values at 110 mbsf, which remain in the range of 1.7 to 5.4 down to 700 mbsf. Diagenetic carbonates were precipitated in pore waters in which d18O and d13C values were highly modified by strong fractionation effects, both in the water and in the CO2-CH4 systems associated with the formation and dissociation of gas hydrates.
    Keywords: Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 3 datasets
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    DATA PANGAEA
  • 6
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    (Table 3) Sulphur isotopic composition of pyrite concretions from ODP Hole 164-994C and Site 164-997 (2000)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 164-994C; 164-997A; 164-997B; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg164; Mass spectrometer Optima-Isogas triple collector; Nicaraguan Rise, North Atlantic Ocean; Ocean Drilling Program; ODP; Sample code/label; Sample type; South Atlantic Ocean; δ34S, pyrite
    Type: Dataset
    Format: text/tab-separated-values, 12 data points
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    DATA PANGAEA
  • 7
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    (Table 1) Mineralogy and stable isotopic composition of diagenic carbonates from ODP Leg 164 sites (2000)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 164-991A; 164-992A; 164-993A; 164-994C; 164-995A; 164-997A; 164-997B; Calculated; Carbonates; DEPTH, sediment/rock; Dolomite d(104); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Elevation of event; Event label; Joides Resolution; Latitude of event; Leg164; Longitude of event; Mass spectrometer Optima-Isogas triple collector; Nicaraguan Rise, North Atlantic Ocean; Ocean Drilling Program; ODP; Sample code/label; South Atlantic Ocean; Temperature, in rock/sediment; X-ray diffraction (XRD); δ13C, calcite; δ13C, dolomite; δ13C, siderite; δ18O, calcite; δ18O, dolomite; δ18O, siderite; δ18O, water
    Type: Dataset
    Format: text/tab-separated-values, 305 data points
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    DATA PANGAEA
  • 8
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    (Table 2) Mineralogy and stable isotopic composition of calcite and dolomite in ODP Hole 164-994C sediments (2000)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 164-994C; Calcite (peak area); Calcite d(104); Calcium carbonate; DEPTH, sediment/rock; Dolomite (peak area); Dolomite d(104); DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg164; Mass spectrometer Optima-Isogas triple collector; Ocean Drilling Program; ODP; Pyrite (peak area); Sample code/label; Siderite (peak area); South Atlantic Ocean; X-ray diffraction (XRD); δ13C, calcite; δ18O, calcite
    Type: Dataset
    Format: text/tab-separated-values, 830 data points
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    DATA PANGAEA
  • 9
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    (Table 2) Stable isotope composition of carbonates at ODP Hole 107-653B (1990)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 107-653B; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Joides Resolution; Leg107; Ocean Drilling Program; ODP; Sample code/label; Tirreno Sea; δ13C, calcite; δ13C, dolomite; δ18O, calcite; δ18O, dolomite
    Type: Dataset
    Format: text/tab-separated-values, 30 data points
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    DATA PANGAEA
  • 10
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    (Table 1) Lithologic description and stable isotope composition of sulfates at ODP Leg 107 sites (1990)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 107-652A; 107-653B; 107-654A; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Joides Resolution; Leg107; Lithology/composition/facies; Ocean Drilling Program; ODP; Sample code/label; Tirreno Sea; δ18O; δ34S, sulfate
    Type: Dataset
    Format: text/tab-separated-values, 174 data points
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    DATA PANGAEA
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