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Showing 1 to 20 of 33 for “"pore fluids"”.
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Effects of stress, pore pressure, and pore fluids on bulk strain, velocity, and permeability in rocks
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric and Planetary Sciences, 1984.
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Fluctuations in resistivity in the Tuscaloosa Marine Shale, southwest Mississippi and southeast Louisiana
… quantities of oil, analysis of the mineralogy, pore fluids, and physical properties of the shale calibrated with the resistivity readings from wireline logs give evidence that the increase in resistivity is not due entirely to the generation of oil, but instead caused by the relationship of pore …
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Seepage of hydrocarbon bearing fluids at the Carlos Ribeiro and Darwin mud volcanoes (Gulf of Cadiz)
… important pathway for transfer of deep-sourced fluids enriched in hydrocarbons and other elements into the ocean. Mud volcanoes (MVs) occur in abundance on all oceanic plate margins, so fluxes of methane (CH4) and other chemical constituents from mud volcanism are likely to be significant for …
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Stratigraphy, sedimentology, and diagenetic history of the Siluro- Devonian Helderberg Group, central Appalachians
… compositions of Helderberg shallow burial pore fluids are similar to values in modern coastal meteoric groundwaters. Extensive meteoric groundwater systems developed over a 3-4 m. y. period when the Helderberg Group was subaerially exposed along the eastern basin margin and when Helderberg …
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Depositional environments, ichnology and diagenesis of the upper Frobisher-Alida beds of the Elkhorn Ranch and Roughrider fields of western North Dakota
… readily compact and thus inhibit movement of pore fluids. </p><p> Diagenetic effects upon the rocks studied were varied and complex. Diagenetic effects which commenced prior to complete lithification included mechanical compaction, micritization and inversion of aragonite. Eogenetic diagenesis …
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Iron inputs from sediments to the oceans
… of the nature of Fe phases involved in sediment, porefluid<br/>and seawater cycling is limited.<br/>The nature of Fe cycling was investigated in deep-sea volcaniclastic surface-sediments<br/>(0-20 cmbsf). Pore-fluid and sediment samples were collected from tephra-rich sites near<br/>the active …
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An Experimental Study on the Aging of Sands
… stresses, densities, tempera-tures, and pore fluids. In every rigid wall cell, three independent measurements were made to monitor property changes during the aging process: small strain shear modulus using bender elements, electrical conductivity, and mini-cone penetration resistance. At …
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Depositional and Diagenetic History of the Permian Unayzah A Reservoir, South Haradh, Saudi Arabia with Implications for Deep Gas Exploration and Development
… between 150o and 225oC produced acidic pore fluids that caused dissolution of earlier formed carbonates to generate secondary intragranular, moldic and micro pores. Thin, early clay and hydrocarbon rims as well as possible early microquartz cements inhibited cementation of primary …
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Determination of the velocity of sound in reservoir fluids using an equation of state
… pressure, composition and density of pore fluids has strong influence on the seismic elastic properties. Elastic properties of fluids are usually simplified in geophysics. All existing software employs empirical relations to calculate seismic wave velocities in reservoir fluids. In …
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Modeling volcanic unrest by data assimilation
… unrest, such as deformation, failure, and pore fluid migration. First, using a series of tests based on the synthetic data, I optimize a data assimilation technique, Ensemble Kalman Filter (EnKF), to improve its performance in forecasting volcanic unrests with multiple geodetic …
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Fluid flow and deformation history of the Denver basin, CO region: fluid inclusions, U-Pb geochronology and isotope geochemistry of calcite-filled fracture cements in the Niobrara Formation
… indicate rock-water interaction with connate pore fluids. Strontium isotopic data corroborates this but suggests input of secondary fluids from a radiogenic source. Earliest fluid flow phases between 81-70 Ma are associated with polygonal faulting and expulsion of connate fluids, including …
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Barium isotope cycling in the marine environment: Pathways of fractionation and implications for paleoceanographic applications
… ion exchange in marine settings using co-located pore fluids and sedimented BaSO₄. Modeling of natural samples produce results that are consistent with the laboratory study, suggesting that this mode of isotopic fractionation impacts Ba isotopes in the environment and must be accounted for when …
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Barium isotope cycling in the marine environment: pathways of fractionation and implications for paleoceanographic applications
… ion exchange in marine settings using co-located pore fluids and sedimented BaSO4. Modeling constrained by data from natural samples produce results that are consistent with the laboratory study, suggesting that this mode of isotopic fractionation impacts Ba isotopes in the environment and must be …
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Fluid relationships in the Northern Gulf of Mexico using dissolved ion concentrations and strontium isotopes
Pore fluids from the slope in the Gulf of Mexico demonstrate specific ion enrichment and a range in concentration. Dissolved metal and halogen fluid concentrations and strontium isotope ratios from ten sites on the Gulf of Mexico (GoM) continental slope were compared to identify the variations in …
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A STUDY OF THE METAL-BINDING ORGANIC CONSTITUENTS IN GREAT BAY SEDIMENTARY SYSTEMS
<p>The fact that the concentration of copper in pore fluids exceeds the values predicted by simple solubility products has led to the suggestion that the copper is solubilized by the formation of copper-organic matter complexes. Previous attempts by other workers to form these complexes have …
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Fluid-mobile element cycling (halogens, boron, lithium) and sourcing through the Costa Rican convergent margin
The source of fluids in convergent margins can be traced using fluid-mobile elements such as Cl, Br, I, B, and Li. However, previous studies have often overlooked the forearc. Describing fluid loss from subducting oceanic crust to the forearc is difficult for several reasons including differences …
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Igneous life cycles: geochemistry of magma from mantle to surface and back again
… units provides a ready source for excess pore fluids that may enable slow-slip events along the Hikurangi subduction zone. Alkaline magmatism at Mountain Pass, CA has attracted attention due to its spatial and temporal association with a REE-rich, economically important carbonatite. …
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Petrography and geochemistry of Cambrian-Ordovician marine cements: Implications for Early Paleozoic cementation processes and seawater chemistry
… that the bladed cements precipitated from pore fluids evolving toward higher Sr/Ca and lower Mg/Ca ratios resulting from the near-seafloor dissolution of aragonite. The prevalence of this evidence of early aragonite dissolution further implicates pCO2 as partly responsible for the observed …
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An Investigation of the Geochemistry and Hydrogeology of the Queen Charlotte Fault
… given to characterizing the relationship between fluids and plate boundary fault systems at convergent margins, yet comparatively little is known about the hydrogeology of submerged transform boundaries. Following the 2012 M7.8 earthquake off western Haida Gwaii, an international scientific …
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MONITORING STORMWATER INFILTRATION IN A VACANT LOT COMPARING TIME-LAPSE ELECTROMAGNETIC INDUCTION AND ELECTRICAL RESISTIVITY TOMOGRAPHY
… was attributed to flushing of high conductivity pore fluids by dilute irrigation or rain water. This explanation was supported using Archie’s Law to model the response of apparent conductivity under highly conductive pore fluid conditions. The EM Profiler was also used under natural precipitation …
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