Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"terrigenous input"”.
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From Continental Margins to the Deep Ocean
… timescales and can be altered by hydrothermal input. In the Guaymas Basin, high FeHR/FeT reflects diagenetic pyritization rather than euxinic conditions. On the Peruvian Margin, elevated FeHR/FeT and U values are influenced by terrigenous input and lateral transport, not solely redox …
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Qualitative and quantitative analyses of Lake Baikal's surface-waters using ocean colour satellite data (SeaWiFS)
… for the case of discharge events. High-organic terrigenous input into Lake Baikal could be traced and information extracted using the SeaWiFS spectral data. Suspended Particulate Matter (SPM) was quantified by the regression of the SeaDAS attenuation coefficient as the optical parameter with SPM …
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Eocene to Miocene geology of southwest Viti Levu, Fiji
… part of a continuous Melanesian Arc. Increased terrigenous input to the Sigatoka basin and the deposition of reef/platform limestones, including a major redeposited carbonate horizon, along the southern basin margin indicate increased emergence of the arc during the later Early and early Middle …
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Geochemical Characterization of the Utica Shale Play using XRF-Based Chemostratigraphy in Ohio
… water depths resulting in different amounts of terrigenous input. Paleoredox conditions revealed the Farley core was deposited in oxygenated bottom waters which account for the depletion of trace metals throughout the core. In the Tracker core, analysis showed that bottom-water conditions at the …
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Natural and anthropogenic influences on recent sediment characteristics in the Knysna Estuary, South Africa and Yangtze River Estuary, China
… Agriculture intensification increased the terrigenous input of Al, K, Ca, Ti and Cu levels. In Unit I (ca. 1960s-Present), the heavy metals Fe, Mn, Pb, Zn and Cu escalated in concentration indicating anthropogenic input due to urbanization and infrastructure development in the Knysna …
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Particle flux in the Western Black Sea in the present and over the last 5,000 years : temporal variability, sources, transport mechanisms
… huxleyi, diatoms, and silicoflagellates) and terrigenous matter from the Danube and nearby local rivers. The relative importance in the supply of these particles varies annually and can be grouped into three phases: Phase I (June-October) coccolithophorid production, Phase II …
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Paleoenvironmental changes in the Black Sea region during the last 26,000 years : a multi-proxy study of lacustrine sediments from the western Black Sea
… reconstructed from the variability of the terrigenous input imply that during the glacial the regional rainfall variability was strongly influenced by Mediterranean sea surface temperatures and decreased in response to the cooling associated with the North Atlantic Heinrich Events H1 and …
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Numerical Modeling as a Means to Enhance Genetic Sedimentary Basin Interpretation : A Case Study of the Southern Cantabrian Basin (NW Spain)
… to the east by increasing subsidence rates and terrigenous input. The change in depositional environment from a shallow-water platform to a mixed carbonate-siliciclastic basinal deposition reflects the response of the lithosphere to the progressively approaching Variscan Orogen. Reverse basin …
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Spatial and temporal variations in the geometry and composition of the Permian Whitehill Formation South Africa
… overlain by dysoxic to oxic waters. Reduced terrigenous input, presence of phosphorites, increasing CIA and increasing δ¹³Corg values with higher TOC point to a depositional setting that resulted from an interplay of sea-level highstand and climatic warm-ups. In contrast, the upper WHF …
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POPULATION DYNAMICS AND GEOCHEMISTRY OF BENTHIC AND PLANKTONIC FORAMINIFERA TO INTERPRET THE PALEOCEANOGRAPHIC CHANGES ACROSS THE CENOMANIAN-TURONIAN OCEANIC ANOXIC EVENT 2 AT LOW AND HIGH LATITUDES
… warm water conditions and an increase in terrigenous input. In contrast, low latitude planktonic foraminiferal assemblages show the initial thermal disruptions of the stratified water column. At Clot Chevalier the seafloor becomes depleted in benthic foraminifera adapted to low organic …
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Sedimentary lipids as indicators of depositional conditions in the coastal Peruvian upwelling regime
… n-alkanols (C24-C28) reflect changes in the input of terrigenous sediment relative to marine sediment during deposition, as indicated by the correlations between these lipids and inorganic indicators of terrigenous clastic debris. The n-alkane carbon preference index (CPI) provides a …