A Geo‐Structurally Based Correction Factor for Apparent Dissolution Rates in Fractured Media
Abstract Field measurements of apparent geochemical weathering reaction rates in subsurface fractured porous media are known to deviate from laboratory measurements by multiple orders of magnitude. To date, there is no geologically based explanation for this discrepancy that can be used to predict r...
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| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2022-08-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2022GL099513 |
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| author | Jeffrey D. Hyman Alexis Navarre‐Sitchler Elizabeth Andrews Matthew R. Sweeney Satish Karra J. William Carey Hari S. Viswanathan |
| author_facet | Jeffrey D. Hyman Alexis Navarre‐Sitchler Elizabeth Andrews Matthew R. Sweeney Satish Karra J. William Carey Hari S. Viswanathan |
| author_sort | Jeffrey D. Hyman |
| collection | DOAJ |
| description | Abstract Field measurements of apparent geochemical weathering reaction rates in subsurface fractured porous media are known to deviate from laboratory measurements by multiple orders of magnitude. To date, there is no geologically based explanation for this discrepancy that can be used to predict reaction rates in field systems. Proposed correction factors are typically based on ad hoc characterizations related to geochemical kinetic models. Through a series of high‐fidelity reactive transport simulations of mineral dissolution within explicit 3D discrete fracture networks, we are able to link the geo‐structural attributes with reactive transport observations. We develop a correction factor to linear transition state theory for the prediction of the apparent dissolution rate based on measurable geological properties. The modified rate law shows excellent agreement with numerical simulations, indicating that geological structure could be a primary reason for the discrepancy between laboratory and field observations of apparent dissolution rates in fractured media. |
| format | Article |
| id | doaj-art-f756d2f19f224a4a8a541e2b40fbf1d3 |
| institution | OA Journals |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2022-08-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-f756d2f19f224a4a8a541e2b40fbf1d32025-08-20T02:17:34ZengWileyGeophysical Research Letters0094-82761944-80072022-08-014915n/an/a10.1029/2022GL099513A Geo‐Structurally Based Correction Factor for Apparent Dissolution Rates in Fractured MediaJeffrey D. Hyman0Alexis Navarre‐Sitchler1Elizabeth Andrews2Matthew R. Sweeney3Satish Karra4J. William Carey5Hari S. Viswanathan6Los Alamos National Laboratory Computational Earth Science (EES‐16) Earth and Environmental Sciences Division Los Alamos NM USAColorado School of Mines Hydrologic Science and Engineering Program Golden CO USADepartment of Earth, Environmental and Resource Sciences University of Texas at El Paso El Paso TX USALos Alamos National Laboratory Computational Earth Science (EES‐16) Earth and Environmental Sciences Division Los Alamos NM USAEnvironmental Molecular Sciences Laboratory Pacific Northwest National Laboratory Richland WA USAEarth and Environmental Sciences Division Los Alamos National Laboratory Earth System Observations (EES‐14) Los Alamos NM USALos Alamos National Laboratory Computational Earth Science (EES‐16) Earth and Environmental Sciences Division Los Alamos NM USAAbstract Field measurements of apparent geochemical weathering reaction rates in subsurface fractured porous media are known to deviate from laboratory measurements by multiple orders of magnitude. To date, there is no geologically based explanation for this discrepancy that can be used to predict reaction rates in field systems. Proposed correction factors are typically based on ad hoc characterizations related to geochemical kinetic models. Through a series of high‐fidelity reactive transport simulations of mineral dissolution within explicit 3D discrete fracture networks, we are able to link the geo‐structural attributes with reactive transport observations. We develop a correction factor to linear transition state theory for the prediction of the apparent dissolution rate based on measurable geological properties. The modified rate law shows excellent agreement with numerical simulations, indicating that geological structure could be a primary reason for the discrepancy between laboratory and field observations of apparent dissolution rates in fractured media.https://doi.org/10.1029/2022GL099513reactive transport modelingfracture networksubsurface flow and transportapparent dissolution ratesgeochemistry |
| spellingShingle | Jeffrey D. Hyman Alexis Navarre‐Sitchler Elizabeth Andrews Matthew R. Sweeney Satish Karra J. William Carey Hari S. Viswanathan A Geo‐Structurally Based Correction Factor for Apparent Dissolution Rates in Fractured Media Geophysical Research Letters reactive transport modeling fracture network subsurface flow and transport apparent dissolution rates geochemistry |
| title | A Geo‐Structurally Based Correction Factor for Apparent Dissolution Rates in Fractured Media |
| title_full | A Geo‐Structurally Based Correction Factor for Apparent Dissolution Rates in Fractured Media |
| title_fullStr | A Geo‐Structurally Based Correction Factor for Apparent Dissolution Rates in Fractured Media |
| title_full_unstemmed | A Geo‐Structurally Based Correction Factor for Apparent Dissolution Rates in Fractured Media |
| title_short | A Geo‐Structurally Based Correction Factor for Apparent Dissolution Rates in Fractured Media |
| title_sort | geo structurally based correction factor for apparent dissolution rates in fractured media |
| topic | reactive transport modeling fracture network subsurface flow and transport apparent dissolution rates geochemistry |
| url | https://doi.org/10.1029/2022GL099513 |
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