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Constraining magnesium cycling in marine sediments using …
Sep 1, 2010 · We developed a numerical model to quantify the cycling of magnesium in deep-sea pore-fluids. We use the model, together with measured magnesium concentration and δ 26 …
- Author: J.A. Higgins, D.P. Schrag
- Publish Year: 2010
See results only from sciencedirect.comConstraining Magnesium Cy…
Measurements of pore-fluid magnesium isotope ratios (25 Mg/ 24 Mg and 26 Mg/ …
Mg Nh4 Ion Exchange
The purpose of this work is to develop a model for quantification of the …
A Multi-Component Model
A computer model was used to determine the equilibrium conditions for solid …
Oxygen Isotope Exchange i…
A numerical model is presented for the transport and exchange of oxygen …
Diagenesis and Sr Isotopic …
New Sr isotopic and concentration analyses of bulk carbonate and porewaters from a …
Magnesium Isotopic Com…
To provide inter-lab comparison for high-precision Mg isotope analysis, Mg …
Mg Isotopic Composition of …
The stalactites at sites 5 and 8 are composed only of low-magnesium …
Alteration of Volcanic Matte…
An examination of the concentration-depth profiles of dissolved calcium, …
Diffusion Or Reaction
The model is applied to the profiles of dissolved constituents in cores obtained …
Major Cation Gradients in D…
A model is developed for the diffusive flux through an accumulat- ing. unreactive …
Metallic Bonding - Chemistry LibreTexts
Use the sea of electrons model to explain why Magnesium has a higher melting point (650 °C) than sodium (97.79 °C). If you work through the same argument above for sodium with magnesium, you end up with stronger bonds and hence …
- Studies of sea model for magnesium
Using a simple 1D diffusion–advection–reaction model of pore-fluid magnesium, we estimate rates of net magnesium uptake/removal and asso-ciated net magnesium isotope fractionation …
The role of marine sediment diagenesis in the modern oceanic …
Sep 25, 2019 · Here, we produce a detailed global map of the flux of dissolved magnesium from the ocean into deeper marine sediments (greater than ∼1 meter below seafloor), and quantify …
The role of marine sediment diagenesis in the modern oceanic …
Sep 25, 2019 · Here, we produce a detailed global map of the flux of dissolved magnesium from the ocean into deeper marine sediments (greater than ∼ 1 meter below seafloor), and quantify …
Sodium melts at 98 °C, and magnesium melts at 650 °C
Sodium melts at 98 °C, and magnesium melts at 650 °C. Account for the higher melting point of magnesium using the electron-sea model.
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Simple process extracts valuable magnesium salt …
Sep 23, 2022 · Generating pure magnesium hydroxide, without any calcium contamination, allows researchers to skip energy-intensive and expensive purification steps. The laboratory-scale flow device for...
A theoretical model has been constructed for calculating the concentra- tions of dissolved calcium, magnesium and sulfate in seawater over the past 550 million years (Phanerozoic time).
Illustration of the global modern magnesium cycle in …
Magnesium isotope signatures of seawater (δ ²⁶ Mg sw ) track the surficial Mg cycle, which could provide crucial information on the carbon cycle in Earth’s history.
The long‐term impact of magnesium in seawater on …
Feb 22, 2016 · During periods when seawater Mg/Ca is <2 mol/mol, low-Mg calcite-producing species dominate the foraminiferal community. Vice versa, high-Mg calcite- and aragonite-producing species are more abundant during …
Marine Magnesium vs. Magnesium: What’s the …
Mar 12, 2023 · Marine magnesium, also known as “sea” or “ocean” magnesium, is derived from seawater. It’s a more premium form of magnesium because it contains up to 70 trace minerals and electrolytes in addition to the main active …
Global variability in seawater Mg:Ca and Sr:Ca ratios in the …
Aug 25, 2020 · Seawater Mg:Ca and Sr:Ca ratios are biogeochemical parameters reflecting the Earth–ocean–atmosphere dynamic exchange of elements. The ratios’ dependence on the …
Magnesium in Sea Water: An Electrode Measurement | Science
Magnesium ion in standard I.A.P.O. sea water was measured with a magnesium-sensitive electrode. The results, presented either as magnesium-ion activity (0.017) or as the amount of …
magnesium in marine pore waters is nearly ubiquitously observed in pore water concentration profiles from scientific ocean drilling, exhibiting a clear sedimentary sink for magnesium …
Magnesium in sea water: an electrode measurement - PubMed
Magnesium ion in standard I.A.P.O. sea water was measured with a magnesium-sensitive electrode. The results, presented either as magnesiumion activity (0.017) or as the amount of …
Seawater Chemistry Through Phanerozoic Time | Annual Reviews
The major ion balance of the ocean, particularly the concentrations of magnesium (Mg), calcium (Ca), and sulfate (SO4), has evolved over the Phanerozoic (last 550 million years) in concert …
Magnesium, from the Sea to the Stars - Science History Institute
Nov 3, 2022 · The process of extracting metals from the sea involves oyster shells, natural gas, electricity, and a whole lot of water (about 800 tons’ worth for every one ton of magnesium). …
Magnesium Ions: Activity in Seawater | Science - AAAS
The activity of magnesium ions in seawater was determined from solubility data and found to be between the values determined by Platford and by Garrels and Thompson. Our value may …
Mystery solved: Why seashells’ mineral forms differently in …
The MIT team’s analysis shows that the ratio of calcium to magnesium in the water affects the surface energy of the nucleating crystals; when that ratio passes a specific value, it tips the …
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