Maxima of interstitial water and gas parameters in ODP Leg 182 sediments

During the drilling of the southern Australian continental margin (Leg 182 of the Ocean Drilling Program), fluids with unusually high salinities (to 106?) were encountered in Miocene to Pleistocene sediments. At three sites (1127, 1129, and 1131), high contents of H2S (to 15%), CH4 (50%), and CO2 (70%) were also encountered. These levels of H2S are the highest yet reported during the history of either the Deep Sea Drilling Project or the Ocean Drilling Program. The high concentrations of H2S and CH4 are associated with anomalous Na+/Cl- ratios in the pore waters. Although hydrates were not recovered, and despite the shallow water depth of these sites (200-400 m) and relative warm bottom water temperatures (11-14°C), we believe that these sites possess disseminated H2S-dominated hydrates. This contention is supported by calculations using the measured gas concentrations and temperatures of the cores, and depths of recovery. High concentrations of H2S necessary for the formation of hydrates under these conditions were provided by the abundant (SO4)2- caused by the high salinities of the pore fluids, and the high concentrations of organic material. One hypothesis for the origin of these fluids is that they were formed on the adjacent continental shelf during previous lowstands of sea level and were forced into the sediments under the influence of hydrostatic head.

El aguante en el cuerpo : Construcción de identidad de los hinchas de un club de fútbol argentino

Fil: Zambaglione, Daniel. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

'Lo que pasa en los master queda en los master' : Deporte, sociabilidad y clasificaciones morales entre nadadores master del Club Universitario de La Plata

La presente tesina apunta a comprender el sentido específico que adquiere para un conjunto de nadadores adultos del Club Universitario de La Plata la categoría de master y los modos en que se identifican respecto a ella. En este sentido, a partir de la elaboración y reconstrucción un conjunto de situaciones etnográficas, se analizan diversos aspectos alrededor del aprendizaje de una destreza corporal y la forma en que actores adultos viven una práctica deportiva, reelaboran sus historias de vida, se identifican colectivamente y construyen universos morales específicos. La multiplicidad de definiciones que se ponen en juego alrededor de esta práctica, se articulan en torno a sentidos específicos para las clasificaciones etarias, la vinculación con el cuerpo, la estética corporal y la salud, la superación personal, el sacrificio, la responsabilidad, la diversión y la grupalidad. El problema de investigación es elaborado y analizado empíricamente, a través de un abordaje etnográfico que dialoga críticamente con la bibliografía especializada. Apartándose de las perspectivas que reducen al deporte y a las prácticas del tiempo libre a la dimensión funcional de la reparación y reproducción de la fuerza de trabajo, aquí se procura reponer la dimensión de la agencia entre las prácticas de los sujetos que participan de la experiencia de la 'natación master'

Análisis de las características antropométricas del plantel de sub 15 del Club Atlético Juventud de Las Piedras

El objetivo de este trabajo de investigación fue describir y analizar las características antropométricas del plantel sub 15 del Club Atlético Juventud de Las Piedras y relacionarlas con sus posiciones dentro del campo de juego. Para llevar adelante este estudio se tomó una muestra de 24 jugadores de entre 14 y 15 años, ésta estuvo compuesta por 1 arquero, 9 defensas, 10 volantes y 5 delanteros. Las características antropométricas descritas y analizadas fueron las 5 masas del cuerpo: masa muscular, masa de tejido adiposo, masa ósea, masa residual y piel (protocolo de Kerr y Ross), el somatotipo (protocolo de Heat y Carter), además del peso y la talla. Para llevar adelante estos protocolos se necesitó recolectar datos de pliegues, perímetros, diámetros, peso y talla. El paradigma que sustenta esta investigación es el positivista y el modelo de investigación es el cuantitativo. El nivel que alcanza este trabajo es de tipo exploratorio. El somatotipo medio del equipo fue 2,5 - 3,9 - 2,9, que corresponde a la categoría mesomorfo balanceado. Para el puesto de arquero el somatotipo fue 4,3 - 5 - 2,5, endo mesomorfico. Para los defensas 2,6 - 4,1 - 3,2, meso ectomorfico. Para los volantes 2,5 - 3,9 - 3,8, ectomorfo mesomorfo y para los delanteros 2,6 - 4,6 - 2,7, mesomorfo balanceado. El porcentaje de tejido adiposo medio del equipo fue del 29,8 , para el puesto de arquero 34,1, para los defensas 29,1, para los volantes 30,18 y para los delanteros 26,65 . El tejido muscular medio fue de 40, para el puesto de arquero 39,2, para los defensas 41,6, para los volantes 39,4 y para los delanteros 43,1. El peso y la talla media del plantel fueron 58,1 kg. Y 169,1 cm. respectivamente. Para el puesto de arquero 58,8 kg. y 165 cm., para los defensas 61,5 kg. Y 171,3 cm., para los volantes 56,4 kg. Y 169,6 cm. y por último para los delanteros 55,6 kg. Y 163,3 cm. Como conclusiones podemos afirmar que el porcentaje de masa muscular encontrado en el plantel estuvo por debajo de la media si los comparamos con equipos de igual edad de la República Argentina, no se encontraron grandes diferencias en cuanto al peso y la talla entre las distintas 3 posiciones dentro del campo de juego, a no ser por los defensas que presenta mayor estatura y mayor peso. El puesto de arquero presenta mayor porcentaje de masa grasa. Como recomendaciones finales para futuras investigaciones se proponen entre otras indagar acerca de posibles causas que influyen en el perfil antropométrico actual de los deportistas evaluados y plantear aspectos dirigidos a optimizar el mismo, realizar un perfil completo de los deportistas y llevar adelante un estudio acerca del estado nutricional de los deportistas

Carbonate and bulk grain-size record for ODP Leg 130 holes

A major goal of Ocean Drilling Program (ODP) Leg 130 was to drill four sites down the northeastern flank of the Ontong Java Plateau to collect a series of continuous sedimentary sequences that would provide a depth transect of Neogene sediments. In particular, the study of the sediments recovered along the depth transect is expected to yield high-resolution stratigraphic, geochemical, and physical properties records across intervals of major paleoceanographic changes by evaluating variations of primary sedimentological and paleoceanographic indicators (e.g., carbonates, isotopes, grain size, microfossil assemblages, etc.). This data report presents the results of highresolution (3-5 Ka sample intervals) analyses of carbonate concentration and bulk sediment grain size at Sites 803-806 for the time interval from 2 Ma to the present.

Bulk calcite minor element composition of ODP Leg 130 samples

We investigated minor element ratios (Sr/Ca and Mg/Ca) in bulk sediment samples from Sites 803-807 using a recently optimized sample treatment protocol for calcium-carbonate-rich sediments consisting of sequential reductive and ion exchange treatments. We evaluated this protocol relative to bulk sediment leaching using samples from Sites 804 and 806, the two end-member sites in the depth transect, reporting as well Mn/Ca and Fe/Ca ratios for sediments from these two sites processed by means of both methods. The Sr/Ca ratios were only slightly affected by the sample treatment, with an average reduction of 6%-7% caused primarily by the ion exchange step. The reductive sample treatment, designed to be effective at removing Mn-rich oxyhydroxides, has a major effect on Mg/Ca ratios, with up to 50% reduction, whereas little effect occurred in ion exchange alone on Mg/Ca ratios. The Mn/Ca and Fe/Ca ratios were not consistently offset by the sample treatment, and these ratios do not appear to be representative of calcite geochemistry reflecting either ocean history or diagenetic overprinting. Celestite solubility appears to be an important control on interstitial water Sr concentrations in these sites, and it must be considered when constructing Sr mass balance models of calcite recrystallization. Calcite Sr/Ca ratios (range 1-2 mmol/mol) are similar from site to site when plotted vs. age, with a pattern comparable to that for well-preserved foraminifer tests over the past 40 Ma. Interstitial water Mg and Ca gradients appear to reflect basement character and the intensity of alteration; they can vary substantially over a small area. Calcite Mg/Ca ratios (range 1.5-4.5 mmol/mol) differ from site to site, with generally higher ratios for sites at a shallower water depth. Increasing calcite Mg/Ca ratios correlate with decreasing Sr/Ca ratios in the treated samples. No consistent pattern exists for calcite Mg/Ca ratios vs. age or depth, nor is any direct correlation to interstitial water Mg/Ca ratios present.

Geochemistry of ODP Leg 129 igneous rocks

This report presents all the available major and trace elemental analyses and Sr, Nd, and Pb isotopic compositions of basaltic rocks recovered from Ocean Drilling Program Sites 800, 801, and 802 during Leg 129 (Table 1). Its main purpose is to provide other investigators a complete summary of geochemical data for Leg 129 basement basalts that they can use for later work. Detailed discussions of the data are presented elsewhere in the volume by Floyd and Castillo (Site 801 geochemistry and petrogenesis, dataset: doi:10.1594/PANGAEA.779154) Floyd et al. (Sites 800 and 802 geochemistry and petrography, dataset: doi:10.1594/PANGAEA.779129), Alt et al. (Site 801 alteration, dataset: doi:10.1594/PANGAEA.779207), and Castillo et al. (Sr, Nd, and Pb isotope geochemistry of Leg 129 basalts, dataset: doi:10.1594/PANGAEA.779191).

Distribution and abundance of calcareous-nannoplankton species in the Cretaceous sediments of DSDP Leg 62 Holes

Cretaceous sediments were recovered at all four sites (Sites 463-466) of the central North Pacific drilled during Leg 62 of the Deep Sea Drilling Project. One of the objectives was to get more information about the development of ocean plankton communities and early evolution of planktonic groups of the Mesozoic. In this article, the Cretaceous calcareous nannofossils from two areas of the central North Pacific (Mid-Pacific Mountains and Hess Rise) are listed and discussed. (The Cenozoic calcareous nannofossils are discussed by R. Schmidt 1981). Coring was continuous at all sites. Mesozoic calcareous nannoplankton assemblages range on the Mid-pacific Mountains from Barremian to Early Maastrichtian, and on Hess Rise from Albian to Late Maastrichtian. (No calcareous nannofossils older than Barremian or Albian respectively were found).

Grain size analyses of ODP Leg 178 sites

Sites 1095, 1096, and 1101 were drilled on the continental rise west of the Antarctic Peninsula (Fig. F1) to recover a continuous high-resolution record of Antarctic glaciation. Site 1095 is the subject of a short paper in this volume (Pudsey, 2001, doi:10.2973/odp.proc.sr.178.214.2001), whereas mass accumulation rates at the three sites are described by Wolf-Welling (2001, doi:10.2973/odp.proc.sr.178.223.2001) and ice-rafted debris at Site 1101 is discussed by Cowan (2001, doi:10.2973/odp.proc.sr.178.206.2001) This report documents grain-size data (sand and fine fraction) and the proportion of biogenic silica for the upper 300 m at Site 1095, the upper 250 m at Site 1096, and the whole 220 m at Site 1101.

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.

Distribution of quaternary siliceous sponge spicules in sediments of ODP Leg 180 sites

Siliceous sponge spicules were found in Quaternary sediments recovered during drilling of Leg 180. The assemblage consists mainly of monaxon forms. Relative abundances of the various types are tabulated.

El club industrial y su primera exposición

Fil: Panettieri, José. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.