Sueños proféticos en el Baladro de Burgos 1498

No parece necesario abundar sobre el peso específico del que gozó el sueño como vehículo de revelación divina dentro del sistema conceptual de las religiones grecorromana y judeocristiana; tampoco, sobre sus posibles productividad discursiva y significatividad ideológica para una tradición mucho más específica, la novela de caballerías castellana, entre cuyos resortes narrativos predilectos se cuentan los discursos de profetas, magos y adivinos. Son estos dos presupuestos los que explican la leve sorpresa de que El baladro del sabio Merlín con sus profecías del incunable burgalés de 1498 -que en su relativa brevedad como ejemplar del género caballeresco prodiga al lector ciento cincuenta textos proféticos- proponga sólo tres revelaciones oníricas, dos habidas por el rey Artur y una por el propio "sabio" Merlín; de hecho, la sección inicial del relato -que comprende hasta XVIII: 33 y que traduce una prosificación del hoy fragmentario Roman de Merlin en verso francés escrito por Robert de Boron- prescinde por completo de tal especie profética. El objetivo de esta comunicación es reflexionar brevemente sobre la funcionalidad y el sentido de esos tres casos que constituyen una raraavisdentro del enorme sistema proféticode nuestra novela.

Geochemistry at DSDP Leg 62 Holes

A total of 191 samples was collected for inorganic geochemical analyses from DSDP Holes 463, 464, 465, 465A, and 466. These samples were collected with two main goals. First, at least one sample was collected from each core, whenever possible, to document the general geochemical variability within lithologic units. Unfortunately, several lithologic units were inadequately sampled because of poor recovery, mostly due to the presence of chert. The least-sampled units are Units III in Hole 464 and Units IB and II in Hole 466. The second goal was to look for geochemical differences between contrasting lithologies within main lithologic units, particularly between cyclic interbeds of red and green limestone in Lithologic Unit II, Hole 463, and between olive, laminated limestone and gray, massive limestone in Lithologic Unit II, Hole 465A.

Major and trace element composition of sepentine muds and metabasic rocks of ODP Leg 195 and Leg 125 sites

New geochemical data on serpentinite muds and metamorphic clasts recovered during Ocean Drilling Program Legs 195 (Holes 1200A-1200E) and 125 (Holes 778A and 779A) provide insights into the proportions of rock types of various sources that compose the serpentinite mudflows and the fluid-rock interactions that predominate in these muds. We interpret the metamorphic rock fragments as derivatives of mostly metamorphosed mafic rocks from the descending Pacific oceanic crust. Based on their mid-ocean-ridge basalt (MORB)-like Al2O3, TiO2, CaO, Si/Mg, and rare earth element (REE) systematics, these metamorphic rocks are classified as metabasalts/metagabbros and, therefore, ~30-km depths represent an active subduction zone setting. The serpentinite muds from Holes 1200A and 1200E have slightly lower REE when compared to Hole 1200D, but overall the REE abundance levels range between 0.1-1 x chondrite (CI) levels. The chondrite-normalized patterns have [La/Sm]N ~ 2.3 and [Sm/Yb]N ~ 2. With the exception of one sample, the analyzed metamorphic clasts show flat to slightly depleted light REE patterns with 1.0-15 x CI levels, resembling MORBs. Visually, ~6 vol% of the serpentinized muds are composed of 'exotic' materials (metamorphic clasts [schists]). Our mixing calculations confirm this result and show that the serpentinite muds are produced by additions of ~5% metamafic materials (with flat and up to 10 x CI REE levels) to serpentinized peridotite clast material (with very low REE abundances and U-shaped chondrite-normalized patterns). The preferential incorporation of B, Cs, Rb, Li, As, Sb, and Ba into the structure of H2O-bearing sheet silicates (different than serpentine) in the Leg 125 and Leg 195 metamorphic clasts (chlorite, amphibole, and micas) have little effect on the overall fluid-mobile element (FME) enrichments in the serpentinite muds (average B = ~13 ppm; average Cs = ~0.05 ppm; average As = ~1.25 ppm). The extent of FME enrichment in the serpentinized muds is similar to that described for the serpentinized peridotites, both recording interaction with fluids very rich in B, Cs, and As originating from the subducting Pacific slab.

Mineralogy and geochemistry at DSDP Hole 62-465A

Core recovered from Hess Rise contains concentrations of pyrite, marcasite, and barite in the lowermost meter of limestone (Unit II) and in the brecciated upper part of the underlying volcanic basement (Unit HI). Petrographic and chemical data indicate that the sulfide-barite assemblage in the limestone is mainly a product of low-temperature diagenetic processes. The iron-sulfide phases are biogenic and their concentrations mark the diffusion of sea water sulfate through sedimentary horizons containing abundant organic matter and mafic, glassy volcanogenic detritus. There is some evidence, however, that elevated temperatures augmented or intensified the synsedimentary diagenetic process.

Petrology and geochemistry of silicified upper Miocene chalk at DSDP Site 69-504

Chert, Porcellanite, and other silicified rocks formed in response to high heat flow in the lower 50 meters of 275 meters of sediments at Deep Sea Drilling Project Site 504, Costa Rica Rift. Chert and Porcellanite partly or completely replaced upper Miocene chalk and limestone. Silicified rock occurs as nodules, laminae, stringers, and casts of burrows, and consists of quartz and opal-CT in varying amounts, associated with secondary calcite. The secondary silica was derived from dissolution of opal-A (biogenic silica), mostly diatom frustules and radiolarian tests. Temperature data obtained at the site indicate that transformation of opal-A to opal-CT began at about 50°C, and transformation from opal-CT to quartz at about 55°C. Quartz is most abundant close to basement basalts. These silica transformations occurred over the past 1 m.y., and took place so rapidly that there was incomplete ordering of opal-CT before transformation to quartz; opal-CT formed initially with an uncommonly wide d spacing. Quartz shows poor crystallinity. Chemical data show that the extensively silicified rocks consist of over 96% SiO2; in these rocks, minor and trace elements decreased greatly, except for boron, which increased. Low Al2O3 and TiO2 contents in all studied rocks preclude the presence of significant volcanic or terrigenous detritus. Mn content increases with depth, perhaps reflecting contributions from basalts or hydrothermal solutions. Comparisons with cherts from oceanic plateaus in the central Pacific point to a more purely biogenic host sediment for the Costa Rica Rift cherts, more rapid precipitation of quartz, and formation nearer a spreading center. Despite being closer to continental sources of ash and terrigenous detritus, Costa Rica Rift cherts have lower Al2O3, Fe2O3, and Mn concentrations.

Sueños proféticos en el Baladro de Burgos 1498

No parece necesario abundar sobre el peso específico del que gozó el sueño como vehículo de revelación divina dentro del sistema conceptual de las religiones grecorromana y judeocristiana; tampoco, sobre sus posibles productividad discursiva y significatividad ideológica para una tradición mucho más específica, la novela de caballerías castellana, entre cuyos resortes narrativos predilectos se cuentan los discursos de profetas, magos y adivinos. Son estos dos presupuestos los que explican la leve sorpresa de que El baladro del sabio Merlín con sus profecías del incunable burgalés de 1498 -que en su relativa brevedad como ejemplar del género caballeresco prodiga al lector ciento cincuenta textos proféticos- proponga sólo tres revelaciones oníricas, dos habidas por el rey Artur y una por el propio "sabio" Merlín; de hecho, la sección inicial del relato -que comprende hasta XVIII: 33 y que traduce una prosificación del hoy fragmentario Roman de Merlin en verso francés escrito por Robert de Boron- prescinde por completo de tal especie profética. El objetivo de esta comunicación es reflexionar brevemente sobre la funcionalidad y el sentido de esos tres casos que constituyen una raraavisdentro del enorme sistema proféticode nuestra novela.

Sueños proféticos en el Baladro de Burgos 1498

No parece necesario abundar sobre el peso específico del que gozó el sueño como vehículo de revelación divina dentro del sistema conceptual de las religiones grecorromana y judeocristiana; tampoco, sobre sus posibles productividad discursiva y significatividad ideológica para una tradición mucho más específica, la novela de caballerías castellana, entre cuyos resortes narrativos predilectos se cuentan los discursos de profetas, magos y adivinos. Son estos dos presupuestos los que explican la leve sorpresa de que El baladro del sabio Merlín con sus profecías del incunable burgalés de 1498 -que en su relativa brevedad como ejemplar del género caballeresco prodiga al lector ciento cincuenta textos proféticos- proponga sólo tres revelaciones oníricas, dos habidas por el rey Artur y una por el propio "sabio" Merlín; de hecho, la sección inicial del relato -que comprende hasta XVIII: 33 y que traduce una prosificación del hoy fragmentario Roman de Merlin en verso francés escrito por Robert de Boron- prescinde por completo de tal especie profética. El objetivo de esta comunicación es reflexionar brevemente sobre la funcionalidad y el sentido de esos tres casos que constituyen una raraavisdentro del enorme sistema proféticode nuestra novela.

Composition of carbonaceous sediments from the Late Jurassic Volgian Basin of the East European Platform (Kostroma Region, Russia)

Lithological, geochemical, stratigraphic, and paleoecological features of carbonaceous sediments in the Late Jurassic Volgian Basin of the East European Platform (Kostroma Region) are considered. The shale-bearing sequence studied is characterized by greater sedimentological completeness as compared with its stratotype sections in the Middle Volga region (Gorodishche, Kashpir). Stratigraphic position and stratigraphy of the shale-bearing sequence, as well as distribution of biota in different sedimentation settings are specified. It is shown that Volgian sediments show distinct cyclic structure. The lower and upper elements of cyclites consist of high-carbonaceous shales and clayey-calcareous sediments, respectively, separated by transitional varieties. Bioturbation structures in different rocks are discussed. Microcomponent composition and pyrolytic parameters of organic matter, as well as distribution of chemical elements in lithologically variable sediments are analyzed. Possible reasons responsible for appearance of cyclicity and accumulation of organic-rich sediments are discussed.

Composition of sediments, rocks, and ores from the Northern and Equatorial Indian Ocean

The monograph has been written on the base of data obtained from samples and materials collected during the 19-th cruise of RV ''Akademik Vernadsky'' to the Northern and Equatorial Indian Ocean. Geological features of the region (stratigraphy, tectonic structure, lithology, distribution of ore-forming components in bottom sediments, petrography of igneous rocks, etc.) are under consideration. Regularities of trace element concentration in Fe-Mn nodules, nodule distribution in bottom sediments, and engineering-geological properties of sediments within the nodule fields have been studied. Much attention is paid to ocean crust rocks. The wide range of ore mineralization (magnetite, chromite, chalcopyrite, pyrite, pentlandite, and other minerals) has been ascertained.

Dissolved chemical elements in river waters of the Wrangel Island

Pioneer information about chemical composition of river waters in the Wrangel Island has been obtained. It is shown that water composition reflects the lithogeochemical specifics of primary rocks and ore mineralization. In contrast to many areas of the Russian Far North river waters of the island are characterized by elevated background value of total mineralization (i.e., total dissolved solids, TDS) (0.3-2 g/l) and specific chemical type (SO4-Ca-Mg). This is related to abundance of Late Carboniferous gypsiferous and dolomitic sequences in the mountainous area of the island. It has also been established that salt composition of some streams is appreciably governed by supergene alterations of sulfide mineralization associated with quartz-carbonate vein systems. They make up natural centers of surface water contamination. Waters in such streams are characterized by low pH values (2.4-5.5), high TDS (up to 6-23 g/l) and SO4-Mg composition. These waters are also marked by anomalously high concentrations of heavy and non-ferrous metals, as well as REE, U, and Th.