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  • Example 18Inverse Modeling of the Madison Aquifer

    Example 18inverse Modeling Of The Madison Aquifer

    Madison Aquifer Results and Discussion. The predominant reactions determined by mole-balance modeling are dedolomitization, ion exchange, halite dissolution, and sulfate reduction, as listed in table 54 for the various modeling options discussed next. The driving force for dedolomitization is dissolution of anhydrite (about 20 mmol/kgw, table 54), which causes calcite precipitation and ...

  • PotentialpH diagrams considering complex oxide solution

    Potentialph Diagrams Considering Complex Oxide Solution

    Nov 12, 2020 To further understand the reason for the stoichiometry of halite, the solubility of elements in halite phase in equilibrium with other phases in

  • Path from Reaction Control to Equilibrium Constraint for

    Path From Reaction Control To Equilibrium Constraint For

    with the data for the dissolution of NaCl at 25 C. The chemical anity model is a combination of eqs 5 and 6. The model represented by the line marked Temkins ASN 2 is a combination of eqs 6 and 7 with a value of 2 for . The values of kused for the chemical anity model and Temkins average stoichiometry number model are ...

  • Genesis and shape of natural solution cavities within salt

    Genesis And Shape Of Natural Solution Cavities Within Salt

    1 Since the genesis and shape of natural deepseated cavities within a salt body are insufficiently understood, the current study tries to shed some light on this topic. To this end, freshwater was pumped slowly through a horizontal borehole in rock salt cores. Owing to fast halite dissolution kinetics, high solubility, and slow inflow rate, halite dissolution took place only in the inflow ...

  • Regional WellLog Correlation New Mexico Portion the

    Regional Welllog Correlation New Mexico Portion The

    anhydrite and halite units (Lambert, 1983). The com- plete section of the Castile is divided into seven mem- bers (in descending order) Anhydrite IV, Halite 111, Anhydrite 111, Halite 11, Anhydrite 11, Halite I, and Anhydrite I. The section is not universally complete because of

  • Groundwater salinization in shallow aquifers adjacent to a

    Groundwater Salinization In Shallow Aquifers Adjacent To A

    Feb 23, 2016 However, block of groundwater samples were positioned above the halite dissolution line which cant be simply interpreted by halite dissolution (Appelo and Postma 1993). The enrichment of Na relative to Cl gave clues regarding the contribution of other processes such as cation exchange or the dissolution of other sodium salts to the ...

  • Synthetic Fluid Inclusions in the Systems NaClH O and

    Synthetic Fluid Inclusions In The Systems Naclh O And

    halite-saturated field in the phase diagram of the H 2O-CO 2-NaCl system at 800C and 900 MPa by the interpo-lation of experiments. Because the halite solubility curve in the presence of CO 2 has not been established, researchers have ignored the effect of CO 2 on salinity in discussions about hydrothermal fluid. Thus, by measuring the NaCl ...

  • Hydrogeochemical classification of deep formation waters

    Hydrogeochemical Classification Of Deep Formation Waters

    Jan 01, 2015 Deep formation waters from Western Europe, Russia and North America are classified by the major water components (Ca 2, Cl , Mg 2, Na ) and barium/sulphate ratios.The data are used to identify important hydrogeochemical processes (e.g., halite dissolution and albitisation) that lead to the different composition of formation waters.

  • MixingInduced Precipitation in Brine Mining Reactive

    Mixinginduced Precipitation In Brine Mining Reactive

    consistency of halite rock, no casing is used. fig 1. Sketch of the brine exploitation, with two aquifers, A and B, separated by an aquitard. The area within the dotted line represents the modeled domain. Kozenys During the brine extraction, a drop in the brine level in the well is observed. The

  • PDF Hydrogeochemical processes in the PlioQuaternary

    Pdf Hydrogeochemical Processes In The Plioquaternary

    Distribution of water samples plotted with respect to dissolution of (a) halite (b) gypsum, (c) calcite and (d) dolomite in the waters of Remila (Khenchela). L. Aouidane, M. Belhamra / Journal of ...

  • Example 16Inverse Modeling of Sierra Spring Waters USGS

    Example 16inverse Modeling Of Sierra Spring Waters Usgs

    The input file for this example is given in table 47.The SOLUTION_SPREAD data block is used to define the two spring waters. The INVERSE_MODELING data block defines the inverse-modeling calculations, including the solutions and phases to be used, the mole-balance equations, the uncertainty limits, whether all or only minimal models will be printed, and whether ranges of mole transfer ...

  • Along the Cameroon Volcanic Line 7 39 40 and elsewhere in

    Along The Cameroon Volcanic Line 7 39 40 And Elsewhere In

    Along the Cameroon Volcanic Line 7 39 40 and elsewhere in other countries 41 42 from STATS 1110 at Ohio University, Athens

  • IJERPH Free FullText Shallow Groundwater Quality and

    Ijerph Free Fulltext Shallow Groundwater Quality And

    In other words, the equivalent Na /Cl ratio would be 11 if halite dissolution is the sole source of Na and Cl . However, higher Na concentrations with respect to Cl than expected from the theoretical 11 halite dissolution line were found in most of the groundwater samples (Figure 5a).

  • Example 16Inverse Modeling of Sierra Spring Waters

    Example 16inverse Modeling Of Sierra Spring Waters

    Mole transfer in millimoles per kilogram water, positive numbers indicate dissolution and negative numbers indicate precipitation Reactant. Composition. Mole transfer Halite NaCl. 0.016 Gypsum CaSO 4. 2H 2 O.015. Kaolinite. Al 2 Si 2 O 5 (OH) 4-.033. Ca-Montmorillonite. Ca 0.17 Al 2.33 Si 3.67 O 10 (OH) 2-.081. CO2gas. CO 2.427. Calcite ...

  • PDF Halite dissolution derived brines in the vicinity of

    Pdf Halite Dissolution Derived Brines In The Vicinity Of

    Permian halite dissolution and residual Permian evaporite Studies from the offshore parts of the basin (North Sea brines have been evidenced (Fischer and Kreitler, 1987 Basin, Egeberg and Aagaard, 1989 Warren and Smalley, 1992, Knauth, 1988 Eastoe et al. 1999) and the central Mississippi Smalley and Warren 1993) as well as from the onshore ...

  • A Protocol to Identify Flowback Water Contamination to

    A Protocol To Identify Flowback Water Contamination To

    Halite Precipitation Bromide Remains in Brine Carpenter, 1978 Halite---very low Br/CL Brineshigher Br/Cl. 0 1000 2000 3000 4000 5000 6000 7000 8000 0 10 20 30 40 50 60 70 80 Chloride (mmol/kg water) Bromide (mmol/kg water) APPALACHIAN SEAWATER EVAPORATION LINE Original Brine Halite Dissolution. 1.00E-04 1.00E-03 1.00E-02 1.00E-01 1.E01 1.E ...

  • Numerical and experimental investigation of buoyancy

    Numerical And Experimental Investigation Of Buoyancy

    Apr 15, 2013 1 Introduction 2 Mineral dissolution occurring during fluid flow in fracturesespecially if halite or carbonate minerals are presentmay significantly affect the groundwater chemistry and the hydrodynamic behavior of the large-scale porous formations. This issue is a great concern for many subsurface applications. The genesis of karst systems, dam stability, salt mining, or geological ...

  • 24 CHEMISTRY OF HALITE AND POTASH SALT CORES

    24 Chemistry Of Halite And Potash Salt Cores

    three fractions (halite-rich, kainite-rich, and undiffer-entiated 0.4 mm) of one sample should lie on a straight line. Extrapolation to the intercepts with the kainite- and halite-axis gives the desired values of bromine contents for pure phases. As shown from Figure 1, the data points plotted for samples 14, 16, and 17 constitute straight ...

  • Development and evolution of subaerial halite crust

    Development And Evolution Of Subaerial Halite Crust

    The formation and subsequent dissolution of halite on or within sediments may obscure sedimentary structures and textures that are characteristic of the original depositional processes (Goodall et ...

  • PDF Chemical Kinetics between Brine and Rock Salt

    Pdf Chemical Kinetics Between Brine And Rock Salt

    The dissolution rate of rock salts can be evaluated from chemical compositions of the reactants sodium-chloride (Na-Cl, halite) and calcium-sulphate (Ca-SO 4 , anhydrite), corresponding to the ...

  • Chapter 1 Analysis of Rates of Geochemical Reactions

    Chapter 1 Analysis Of Rates Of Geochemical Reactions

    1 Analysis of Rates of Geochemical Reactions 5 Time (hrs) 0 200 400 600 800 1000 0 5 10 15 20 25 30 nepheline glass jadeite glass albite glass 2 8 Fig. 1.1 Normalized moles of glass cm2 released into solution as a function of time during dis- solution of nepheline (Na

  • Uses of ChlorideBromide Ratios in Studies of Potable

    Uses Of Chloridebromide Ratios In Studies Of Potable

    Aug 04, 2005 In natural ground water systems, both chlorine and bromine occur primarily as monovalent anions, chloride and bromide. Although dissolution or precipitation of halite, biological activity in the root zone, anion sorption, and exchange can affect chloride/bromide ratios in some settings, movement of the ions in potable ground water is most often conservative.

  • CALCITE DISSOLUTION KINETICS AND SOLUBILITY IN

    Calcite Dissolution Kinetics And Solubility In

    The dissolution rate dependency on brine composition, pCO2 (0.1 to 1 bar), and temperature (25.0 to 82.5 C) was modeled using the empirical rate equation where R is the rate, k and n are empirical fitting terms, and the degree of

  • Quartz dissolution kinetics from 100200 C as a function

    Quartz Dissolution Kinetics From 100200 C As A Function

    Dec 01, 1996 OSTI.GOV Journal Article Quartz dissolution kinetics from 100--200 C as a function of pH and ionic strength Title Quartz dissolution kinetics from 100--200 C as a function of pH and ionic strength Full Record

  • BG Temporary and net sinks of atmospheric CO2 due to

    Bg Temporary And Net Sinks Of Atmospheric Co2 Due To

    HI showed that geomorphology development has entered into the old age, and the evaporite such as halite and gypsum has been consumed by dissolution. (2) The stoichiometric relationship between Ca 2 and SO 4 2-(Fig. 2) showed that all of the samples in the study area were located below the 1 1 gypsum dissolution line, and they are also below ...

  • Selected Readings Mineralogy

    Selected Readings Mineralogy

    Dec 26, 2020 The data generated are then used in homework exercises to calculate (1) a simple rate law for the dissolution of halite in pure water (2) the rate of coefficient in that rate law, at two different temperatures and (3) the activation energy of the halite dissolution reaction. The lab and homework illustrate several basic principles of chemical ...

  • Mineral Solubility and Saturation Index

    Mineral Solubility And Saturation Index

    Mineral Solubility and Saturation Index. Equilibrium between Solid Phases and Aqueous Solution. In chemical thermodynamics, the dissolution or precipitation of solid phases (minerals, salts) is controled by the law of mass action.In other words, a mineral A a B b dissolves/precipitates according to the reaction formula 1

  • Waste Isolation Pilot Plant Compliance Certification

    Waste Isolation Pilot Plant Compliance Certification

    Dissolution of Halite and Gypsum, and Hydration of Anhydrite to Gypsum, Rustler Formation, in the Vicinity of the Waste Isolation Pilot Plant, Southeastern New Mexico, Open-File Report 85-229, Denver, CO, U.S. Geological Survey. ... and line of section shown on Page

  • Identification of the dominant hydrogeochemical processes

    Identification Of The Dominant Hydrogeochemical Processes

    The Na /Cl ratio is considered to be one of the most important indicators of the origin of groundwater, where a ratio of 1 represents halite dissolution. 19 The plot of Na versus Cl revealed a trend from excess Cl (Cl Na ) toward the 1 1 stoichiometric ratio line for hand-pump well, dug well, and borehole water samples ...

  • FRONT COVERIndex map of southeastern New Mexico

    Front Coverindex Map Of Southeastern New Mexico

    DISSOLUTION ALONG THE EASTERN MARGIN OF THE DELAWARE BASIN 20 CONCLUSIONS 21 REFERENCES 22 Figures I-Index map of southeastern New Mexico and western Texas. 6 2-Nomenclature and stratigraphic relations of Guadalupian and Ochoan rocks, Delaware Basin. 7 3Llsopach map of Castile Formation. 9 4-Isopach map of Halite 111 and Halite IV. 10

  • PDF Shallow Groundwater Quality and Its Controlling

    Pdf Shallow Groundwater Quality And Its Controlling

    Feb 16, 2020 11 halite dissolution line were found in most of the groundwater samples (Figure 5 a). The equivalent ... stoichiometric ratios in meq/L of the sample s should fall along the 11 line.

  • Lecture 12 What Controls the Composition of River

    Lecture 12 What Controls The Composition Of River

    rivers that dont fall on such a line have more HCO3-than expected from carbonate rock weathering those that lay above the line are consistent with a silicate weathering source for some of the HCO3-. The Rio Grande is the only major river with relatively more Ca2 (below the line) because gypsum can be a major source of Ca2.

  • Evaluation of NaCl and MgCl2 heat exchange fluids in a

    Evaluation Of Nacl And Mgcl2 Heat Exchange Fluids In A

    Feb 27, 2021 The potential for inhibition of precipitation and dissolution using an MgCl2-brine and NaCl MgCl2-brine were also investigated. Within the injection well, heating of an NaCl-brine from 70 to 120 C caused the solubility of halite to decrease, resulting in the potential dissolution of 0.479 mol kg1 halite at the formation.

  • Preliminary Hydrochemical Characterization of the

    Preliminary Hydrochemical Characterization Of The

    waters and the average stoichiometric Na/Cl ratio is around 0.8. Since the whole system presents this feature, the observed stoichiometry seems to be inherited from the recharging groundwaters, for which similar ratios 2010). Although the most apparent -Cl correlation

  • Path from Reaction Control to Equilibrium Constraint for

    Path From Reaction Control To Equilibrium Constraint For

    Aug 31, 2017 The approach to stoichiometric dissolution is related to the stabilization of the surface potential difference. Requirement for Stability Reveals a Hidden Variable For the stationary state to be approached and stoichiometric dissolution to occur in a stable manner, the rates of removal of both cations and anions must be dependent on the potential difference across the Helmholtz layer, .

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