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- Description:
- Three distinct datasets derived from https://ccmc.gsfc.nasa.gov/models/IRI~2016/. NeVLFpropinclin5.dat - Electron density profile collected from https://ccmc.gsfc.nasa.gov/models/IRI~2016/ for Jan 2020 at a resolution of 1km, then interpolated smoothly to a resolution of 0.1km with no abrupt jumps. NiVLFpropinclin5.dat - O+ ion density profile taken from https://ccmc.gsfc.nasa.gov/models/IRI~2016/ for Jan 2020 at a resolution of 1km, then interpolated smoothly to a resolution of 0.1km with no abrupt jumps. NiHplusVLFpropinclin5HighlatAmerica.dat - H+ ion density profile collected from https://ccmc.gsfc.nasa.gov/models/IRI~2016/ for Jan 2020 at a resolution of 1km, then interpolated smoothly to a resolution of 0.1km with no abrupt jumps.
- Keyword:
- Electron density, FDTD, IRI, Ion density, and ionosphere
- Subject:
- ionosphere, Ionospheric electron density, and electrons
- Creator:
- Pedgaonkar, Apoorva
- Owner:
- Madison Golden
- Date Uploaded:
- 06/09/2025
- Date Modified:
- 06/09/2025
- Date Created:
- 2024-07-12 to 2025-03-05
- License:
- Public Domain – This data is free of copyright restrictions (e.g. government sponsored data).
- Identifier:
- https://doi.org/10.7278/S5d-khd5-xqhg
- Creator:
- Pedgaonkar, Apoorva
- Owner:
- Date Uploaded:
- 06/06/2025
- Date Modified:
- 06/06/2025
- Rights Statement:
- In Copyright
- Resource Type:
- Dataset
- Creator:
- Pedgaonkar, Apoorva
- Owner:
- Date Uploaded:
- 06/06/2025
- Date Modified:
- 06/06/2025
- Rights Statement:
- In Copyright
- Resource Type:
- Dataset
- Creator:
- Pedgaonkar, Apoorva
- Owner:
- Date Uploaded:
- 06/06/2025
- Date Modified:
- 06/06/2025
- Rights Statement:
- In Copyright
- Resource Type:
- Dataset
- Description:
- The simulations associated with this dataset form part of a broader investigation into the effects of heterogeneity in tall vegetated canopies, designed to emulate structural and aerodynamic characteristics of the Amazon rainforest. All cases are forced by a geostrophic wind of 9 m s⁻¹ under neutrally stratified conditions. The case "Hom_lim_9mps" features an almost non-existent vegetation density, with corresponding LAI values of 0.14, while the case “Empty_9mps” refers to a bare soil surface with no vegetation. Simulations were conducted using a Large-Eddy Simulation (LES) domain of size (Lx, Ly, Lz) = (2π, 2π, 1) km, where x, y, and z denote the streamwise, spanwise, and vertical directions. The computational grid consists of (Nx, Ny, Nz) = (256,256,256) points, yielding a spatial resolution of (Δx, Δy, Δz) = (24.5, 24.5, 3.9) m. An aerodynamic roughness length of z0 = 0.01 m is imposed at the surface. Time integration employs a fixed time step of Δt = 0.05 s. Simulations are spun up for 25 h, and data are sampled over the final 5 h of integration. To facilitate data access, a MATLAB script (main_load_snapshots.m) and a supporting function (load_snaps.m) are provided. These scripts load the binary files and organize them into 4D arrays for subsequent analysis. and See README file for data retrieval instructions.
- Keyword:
- Vegetated canopies, Large Eddy Simulations, Instantaneous velocity fields, Quadrant Analysis, and Roughness Sublayer Flow Statistics
- Subject:
- Turbulence, Atmospheric science, and Computational fluid dynamics
- Creator:
- Salmaso, Giulia and Calaf, Marc
- Owner:
- Kaylee Alexander
- Based Near Label Tesim:
- Salt Lake City, Utah, United States
- Language:
- binary
- Date Uploaded:
- 06/06/2025
- Date Modified:
- 06/10/2025
- Date Created:
- 2022-01-01 to 2025-05-29
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-srwd-k33d
- Description:
- The simulation associated with this dataset form part of a broader investigation into the effects of heterogeneity in tall vegetated canopies, designed to emulate structural and aerodynamic characteristics of the Amazon rainforest. This simulation is forced with streamwise normalized pressure gradient of (1/ρ) (dp/dx) = 1 , where the friction velocity u* = 0.58 m/s and the boundary layer height zi = 1000 m are used as normalizing variables (i.e., dp/dx ~ (u*)^2/zi), and ρ refers to the hydrostatic density. Neutrally stratified conditions are assumed. The homogeneous canopy is characterized by a Leaf Area Index (LAI) of 5.36. This simulation shares the same canopy geometry as the case Hom_eq_gaps_9mps in Deposit 1; however, it differs in that it is driven by a prescribed pressure gradient rather than by geostrophic forcing. The simulations was conducted using a Large-Eddy Simulation (LES) domain of size (Lx, Ly, Lz) = (2π, 2π, 1) km, where x, y, and z denote the streamwise, spanwise, and vertical directions. The computational grid consists of (Nx, Ny, Nz) = (256,256,256) points, yielding a spatial resolution of (Δx, Δy, Δz) = (24.5, 24.5, 3.9) m. An aerodynamic roughness length of z0 = 0.01 m is imposed at the surface. Time integration employs a fixed time step of Δt = 0.02 s. Simulations are spun up for 25 h, and data are sampled over the final 5 h of integration. To facilitate data access, a MATLAB script (main_load_snapshots.m) and a supporting function (load_snaps.m) are provided. These scripts load the binary files and organize them into 4D arrays for subsequent analysis. and See README file for data retrieval instructions.
- Keyword:
- Vegetated canopies, Large Eddy Simulations, Instantaneous velocity fields, Quadrant Analysis, and Roughness Sublayer Flow Statistics
- Subject:
- Turbulence, Atmospheric science, and Computational fluid dynamics
- Creator:
- Salmaso, Giulia and Calaf, Marc
- Owner:
- Kaylee Alexander
- Based Near Label Tesim:
- Salt Lake City, Utah, United States
- Language:
- binary
- Date Uploaded:
- 06/06/2025
- Date Modified:
- 06/10/2025
- Date Created:
- 2022-01-01 to 2025-05-29
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-bg3w-c2a3
- Description:
- The simulations associated with this dataset form part of a broader investigation into the effects of heterogeneity in tall vegetated canopies, designed to emulate structural and aerodynamic characteristics of the Amazon rainforest. All cases are forced by a geostrophic wind of 9 m s⁻¹ under neutrally stratified conditions. The homogeneous canopy cases differ in their vertical Leaf Area Density (LAD) distributions. Specifically, the case "Hom_Amazon_9mps" represents the canonical Amazon forest, characterized by a canopy height of hc = 39 m and a total Leaf Area Index (LAI) of 7.05. The canopy height is fixed across all cases. The remaining homogeneous configurations, i.e. "Hom_eq_gaps_9mps" and "Hom_eq_patches_9mps" feature a reduced LAD profile, with a corresponding LAI value of 5.36. Simulations were conducted using a Large-Eddy Simulation (LES) domain of size (Lx, Ly, Lz) = (2π, 2π, 1) km, where x, y, and z denote the streamwise, spanwise, and vertical directions. The computational grid consists of (Nx, Ny, Nz) = (256,256,256) points, yielding a spatial resolution of (Δx, Δy, Δz) = (24.5, 24.5, 3.9) m. An aerodynamic roughness length of z0 = 0.01 m is imposed at the surface. Time integration employs a fixed time step of Δt = 0.05 s. Simulations are spun up for 25 h, and data are sampled over the final 5 h of integration. To facilitate data access, a MATLAB script (main_load_snapshots.m) and a supporting function (load_snaps.m) are provided. These scripts load the binary files and organize them into 4D arrays for subsequent analysis. and See README file for data retrieval instructions.
- Keyword:
- Vegetated canopies, Large Eddy Simulations, Instantaneous velocity fields, Quadrant Analysis, and Roughness Sublayer Flow Statistics
- Subject:
- Turbulence, Atmospheric science, and Computational fluid dynamics
- Creator:
- Salmaso, Giulia and Calaf, Marc
- Owner:
- Kaylee Alexander
- Based Near Label Tesim:
- Salt Lake City, Utah, United States
- Language:
- binary
- Date Uploaded:
- 06/05/2025
- Date Modified:
- 06/10/2025
- Date Created:
- 2022-01-01 to 2025-05-29
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-r15r-bdqq
- Description:
- This dataset contains measurements from an OTT PARticle SIze and VELocity (PARSIVEL) disdrometer which was installed on the roof of Highland High School in Salt Lake City, Utah, USA (40.724486°N; 111.843723°W; 1372 m MSL) during the cool seasons (November 15 – April 30) ending 2023 through 2024.
- Keyword:
- Orographic precipitation, Snow, Disdrometer, and PARSIVEL
- Subject:
- Atmospheric Science, Precipitation, and Snow
- Creator:
- Kingsmill, David E., Veals, Peter G., Wasserstein, Michael L., Evans, Ashley, and Steenburgh, Jim
- Owner:
- Based Near Label Tesim:
- Salt Lake City, Utah, United States
- Language:
- English
- Date Uploaded:
- 06/05/2025
- Date Modified:
- 06/10/2025
- Date Created:
- 2022-11-26 to 2024-05-10
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-8vtz-5fsn
- Description:
- This dataset contains precipitation measurements from an OTT PARticle SIze and VELocity (PARSIVEL) disdrometer which was installed at the Atwater snow study plot in the town of Alta, Utah, USA (40.591269°N; 111.637789°W; 2682 m MSL) during the cool seasons ending 2023 through 2024.
- Keyword:
- Orographic precipitation, Snow, Disdrometer, and PARSIVEL
- Subject:
- Atmospheric Science, Precipitation, and Snow
- Creator:
- Evans, Ashley, Wasserstein, Michael L., Kingsmill, David E., Steenburgh, Jim, and Veals, Peter G.
- Owner:
- Based Near Label Tesim:
- Alta, Utah, United States
- Language:
- English
- Date Uploaded:
- 06/05/2025
- Date Modified:
- 06/10/2025
- Date Created:
- 2022-11-15 to 2024-05-15
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-wtpn-az0j
- Description:
- This is data from a Micro Rain Radar (MRR) that was deployed at Highland High School in Salt Lake City, UT from 2022–2024. The MRR is a vertically pointing Doppler radar that operates at a frequency of 24 GHz (K-band). The radar collects time series of equivalent reflectivity, Doppler velocity, and Doppler velocity spectrum width, all in 1-dimension (the vertical).
- Keyword:
- MRR, Profiling Radar, Snow, and Precipitation
- Subject:
- Radar, Precipitation, Snow, and Atmospheric Science
- Creator:
- Veals, Peter G., Wasserstein, Michael L., and Steenburgh, Jim
- Owner:
- Kaylee Alexander
- Based Near Label Tesim:
- Salt Lake City, Utah, United States
- Language:
- English
- Date Uploaded:
- 06/02/2025
- Date Modified:
- 06/06/2025
- Date Created:
- 2022-11-23 to 2024-05-10
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-n1jc-2d68
- Description:
- This is data from a Micro Rain Radar (MRR) that was deployed at Alta, UT from 2022–2024. The MRR is a vertically pointing Doppler radar that operates at a frequency of 24 GHz (K-band). The radar collects time series of equivalent reflectivity, Doppler velocity, and Doppler velocity spectrum width, all in 1-dimension (the vertical).
- Keyword:
- MRR, Profiling Radar, Snow, and Precipitation
- Subject:
- Radar, Precipitation, Snow, and Atmospheric Science
- Creator:
- Steenburgh, Jim, Wasserstein, Michael L., and Veals, Peter G.
- Owner:
- Kaylee Alexander
- Based Near Label Tesim:
- Alta, Utah, United States
- Language:
- English
- Date Uploaded:
- 06/02/2025
- Date Modified:
- 06/06/2025
- Date Created:
- 2022-10-28 to 2024-05-15
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-wern-v6kz
- Description:
- This repository includes a file containing polygon data for river channel data for eight study reaches (1, 2A, 2B, 2B short, 3A, 3B, 4A, 4B) across multiple years (1974, 1981, 1995, 2000, 2007 to 2017, and 2018 to 2022), along the Escalante River, Utah, USA. Each channel delineation is uniquely identified by year and reach. Historic imagery was collected from United States Geological Survey and Bureau of Land Management; sourced imagery was accessed through EarthExplorer ( https://earthexplorer.usgs.gov/#close); NAIP imagery from the USDA Geospatial Data Gateway ( https://datagateway.nrcs.usda.gov/GDGHome_DirectDownLoad.aspx); and ESRI imagery from World Imagery Wayback ( https://livingatlas.arcgis.com/wayback/#active=16681&mapCenter=-111.19835%2C37.64870%2C18)
- Keyword:
- Escalante River Watershed, Channel Delineation, GIS, and shapefiles
- Subject:
- Image processing, Water channels, Geographic Information Systems, and Rivers/streams
- Creator:
- McNeally, Phoebe, Scott, Michael L., Williams, Erin J., Friedman, Jonathan M. , and Spence, John R.
- Owner:
- Based Near Label Tesim:
- Escalante, Utah, United States
- Language:
- English
- Date Uploaded:
- 05/27/2025
- Date Modified:
- 05/29/2025
- Date Created:
- 2022 to 2023 (collected) and 1974, 1981, 1995, 2000, 2007 to 2017, 2018 to 2022 (sources)
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset and Map or Cartographic Material
- Identifier:
- https://doi.org/10.7278/S5d-hyk0-w2kf
- Description:
- We deployed a Nanometrics Trillium Compact 20-s, three-component broadband seismometer on the summit of Devils Tower between October 12-13, 2024. The instrument was hauled and carried to the summit by a team of climbers under an approved permit from the National Park Service. The seismometer (labelled station D) was located on the northern portion of the tower summit. It was placed on bare bedrock, with a dab of adhesive putty under each foot to aid coupling, leveled and oriented north, and then covered to prevent wind buffeting. The seismometer was paired with a 24-bit Nanometrics Centaur datalogger recording continuous data at 100 Hz. Two additional identical seismometer setups were also deployed: station C on bedrock near the base of the tower’s south wall, and station A on a large flat boulder embedded in colluvium ~200 m south of the tower. The various instruments had different run times: station D on top of the tower ran the longest for 21 hours from afternoon to late morning, while the overlapping duration of the three sensors was 19 hours (10/12 20:00 to 10/13 15:00 UTC).
- Keyword:
- national parks, modal analysis, and seismology
- Subject:
- seismology and modal response
- Creator:
- Moore, Jeffrey R., Vollinger, Kathryn, and Burjánek, Jan
- Owner:
- Jeff Moore
- Based Near Label Tesim:
- Devils Tower, Wyoming, United States
- Language:
- English
- Date Uploaded:
- 05/14/2025
- Date Modified:
- 05/28/2025
- Date Created:
- 2024-10-12 to 2024-10-13
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-ajvn-wqqq
- Description:
- This dataset includes the python scripts and data required to reproduce work outlined in Mayhew et al. 2025 “The Global Importance of Gas-phase Peroxy Radical Accretion Reactions”. The study investigates the effect of a new atmospheric chemical pathway, gas-phase peroxy radical (RO2) accretion reactions, on global secondary organic aerosol (SOA).
- Keyword:
- Peroxy radical, Climate, Air quality, Aerosol, Accretion reactions, and RO2
- Subject:
- Climate and Air quality
- Creator:
- Haskins, Jessica and Mayhew, Alfred
- Owner:
- Madison Golden
- Language:
- English
- Date Uploaded:
- 04/14/2025
- Date Modified:
- 04/25/2025
- Date Created:
- 2025-04-01
- License:
- CC BY – Allows others to use and share your data, even commercially, with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-80qm-kyjj
- Description:
- This data set contains 12-hour manual new snow and liquid precipitation equivalent (LPE) observations collected at the Alta-Collins (CLN) snow-study plot during the 2023/2024 cool season (October 1–April 30). CLN is located mid-mountain at Alta Ski Area in the Wasatch Range of northern Utah (approximately 111.63889W, 40.57607N) at an elevation of 2945 m.
- Keyword:
- atmospheric sciences and precipitation
- Subject:
- Precipitation
- Creator:
- Wasserstein, Michael L. and Steenburgh, Jim
- Owner:
- Based Near Label Tesim:
- Alta, Utah, United States
- Language:
- English
- Date Uploaded:
- 04/09/2025
- Date Modified:
- 04/25/2025
- Date Created:
- 2023-10-01 to 2024-04-30
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-dx7x-d8ay
- Description:
- Each saguaro was temporarily instrumented with a Raspberry Shake 3D seismometer. The Raspberry Shake 3D is a low-cost and light-weight three-component seismometer that has been extensively benchmarked against other instruments (e.g., Arosio et al., 2023). It records three mutually-orthogonal components of motion (two horizontal and one vertical) using 4.5 Hz geophones with range electronically extended down to at least 0.5 Hz, at a sampling rate of 100 Hz, and internal data storage. I devised a custom mounting bracket for this study consisting of a 3D-printed platform that could be strapped to a saguaro stem and leveled about 1.5 m above ground level. The mounting height was arbitrary, being as high as feasible without requiring a ladder, and the method ensured that no damage was caused to the cactus. A small portable battery provided power.
- Keyword:
- photogrammetry, Saguaro cactus, Ambient vibration, Modal analysis, Numerical modeling, and Biomechanical characterization
- Subject:
- geophysics, seismology, ecology, and remote sensing
- Creator:
- Moore, Jeffrey R.
- Owner:
- Jeff Moore
- Based Near Label Tesim:
- Arizona, Arizona, United States
- Language:
- English
- Date Uploaded:
- 04/07/2025
- Date Modified:
- 04/25/2025
- Date Created:
- 2025-02-17 to 2025-03-28
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Identifier:
- https://doi.org/10.7278/S5d-kx51-x9dg
- Description:
- The purpose of this study was to analyzed fertility intentions, behaviors, and pregnancies among 296 heterosexual couples participating in the Creighton model effectiveness, intentions, behaviors assessment (CEIBA) study. Couples who were new or returning users of the Creighton Model (CrM) with the intention to avoid pregnancy (at entry) at 17 Creighton Model Fertility Care Centers throughout the United States and in Toronto, Canada were enrolled in the study. Females were required to be between the ages of 18 and 39, inclusively, and the couple could not have any identified history, circumstance, or current treatment that would reduce fertility. Written informed consent was obtained from both partners.
- Keyword:
- pregnancy rates, natural family planning, and family planning effectiveness
- Subject:
- natural family planning
- Creator:
- Stanford, Joseph B., Porucznik, Christy, Najmabadi, Shahpar, and Chang, Chun-Pin Esther
- Contributor:
- Crockett, Becky, Fryer, Julie, Kruletz, Sebrena, Musso, Iris, Hansen, Jared, Xu, Crystal, Wu, Charles, Lowe, Michael, Singh, Nirupma, Krakowiak, Daisy, Carruth, Kaitlin, and CrM FertilityCare Centers
- Owner:
- Joseph Stanford
- Based Near Label Tesim:
- United States, , United States and Canada, , Canada
- Language:
- English
- Date Uploaded:
- 03/06/2025
- Date Modified:
- 04/11/2025
- Date Created:
- 2009-09-01 to 2013-02-01
- License:
- CC BY – Allows others to use and share your data, even commercially, with attribution.
- Resource Type:
- Dataset
- Identifier:
- http://doi.org/10.7278/S5d-3xdq-sq8h
- Description:
- The large lattice dynamics of lithium, driven by its low atomic mass, results in energetically similar structures and significant isotope effects under pressure, posing challenges to current theoretical models. Above 20 GPa and at low temperatures, lithium's electronic properties deviate from simple metallic behavior, with superconductivity emerging in a complex, pressure-dependent manner, alongside an unusual isotope effect. The structural phases of 7Li reported under these conditions are inconsistent across studies, and the structures of 6 Li remain unexamined. These gaps limit our understanding of the effects of pressure on lithium's electronic properties and the role of quantum lattice effects on its structural behavior under pressure. Here, we integrate experimental and theoretical approaches to investigate the low-temperature structural phase boundaries in lithium isotopes. We map the structural phase diagram of 7Li from 5 to 55 GPa and 15–75 K, identifying the sequence fcc→ℎ𝑅1→𝑐𝐼16. A pronounced isotope effect is observed, with 6Li shifting the fcc→ℎ𝑅1 phase boundary to lower pressures at 15 K. Density functional theory calculations further clarify how these structural changes affect superconducting properties, particularly emphasizing the role of the fcc→ℎ𝑅1 transition in lithium's superconductivity. Our findings offer insights into the unique behavior of lithium isotopes under pressure.
- Keyword:
- lithium isotopes
- Subject:
- Lithium--Isotopes
- Creator:
- Holle, William, Deemyad, Shanti, and Saffarian-Deemyad, Iren
- Owner:
- Madison Golden
- Date Uploaded:
- 02/13/2025
- Date Modified:
- 03/03/2025
- Date Created:
- 2019-10-10 to 2022-12-20
- License:
- CCO – As the data author, you are choosing to place your data into the public domain.
- Identifier:
- doi.org/10.7278/S5d-aq4d-1d3k
- Description:
- We analyze a new set of 275 n-body calculations designed to place limits on the masses of the small circumbinary satellites in the Pluto-Charon system. Together with calculations reported in previous papers, we repeat that a robust upper limit on the total mass of the four satellites is ~ 9.5 x 10^19 g. For satellite volumes derived from \nh, this mass limit implies a robust upper limit on the bulk densities of Nix and Hydra, <=1.7 g/cm^3, that are comparable to the bulk density of Charon. Additional calculations demonstrate that satellite systems with mass <= 8.25 x 10^19 g are robustly stable over the current age of the Sun. The bulk densities of Nix and Hydra in these lower mass systems are clearly smaller than the bulk density of Charon. These new n-body\results enable accurate measurements of eccentricity and inclination for Nix, Kerberos, and Hydra that agree well with orbital elements derived from numerical calculations with new HST and New Horizons state vectors. With these new state vectors, Styx has a 37 % larger eccentricity and an 85% smaller inclination, which makes it more prone to gravitational perturbations from Nix.
- Keyword:
- dynamical evolution, Kerberos, Hydra, Nix, Charon, Pluto, planets, satellites, and Styx
- Subject:
- Astrophysics
- Creator:
- Kenyon, Scott J. and Bromley, Benjamin C.
- Owner:
- BENJAMIN BROMLEY
- Based Near Label Tesim:
- Greenbelt, Maryland, United States
- Language:
- English
- Date Uploaded:
- 01/29/2025
- Date Modified:
- 01/29/2025
- Date Created:
- 2022-03-26 to 2025-01-17
- License:
- CC BY NC - Allows others to use and share your data non-commercially and with attribution.
- Resource Type:
- Dataset
- Description:
- Assessing the precision of different geochemical methods is crucial for quantifying rare earth elements (REEs) and critical minerals (CMs) in coal-bearing sedimentary strata, with application to broader sedimentary systems. This study analyzed 230 samples via portable X-ray fluorescence (pXRF) and subsequently high-graded them for inductively coupled plasma-mass spectrometry (ICP-MS) analysis. Samples originate from the Uinta Region of Utah and Western Colorado, with lithologies including coal, claystone, siltstone, mudstone, shale, sandstone, and igneous dikes. REE quantification relies heavily on pXRF and ICP-MS datasets, but the precision between these two methods is unconstrained, encouraging the investigation into the controlling variables associated with each analytical technique. With precision as the primary objective, several sample homogeneity and spatial experiments were conducted to compare pXRF and ICP-MS datasets. Results indicate that both datasets exhibit the greatest similarity when analyzing semi-equivalent areas and volumes of samples. Across all lithologies, powdered samples consistently exhibit greater precision between pXRF and ICP-MS datasets than whole rock samples, as seen in improved r2 values. This finding supports a proposed spatial grid approach to pXRF that quantifies the homogeneity of a three-dimensional sample, resulting in data statistically similar to that of ICP-MS. Ultimately, coupled high-resolution analyses using complimentary pXRF and ICP-MS methods (recommended herein) provide the greatest understanding of REE enrichment with the objective of precision. This recommended methodology produces an unbiased pXRF dataset, 63.3%-76.7% statistically similar to that of ICP-MS. This development is crucial for the confident utilization of pXRF analysis for geochemical evaluation, especially considering domestic CM resources.
- Keyword:
- Piceance Basin, critical minerals , precision, Blackhawk Formation, Uinta Basin, pXRF, Ferron Sandstone, Mesaverde Group, methodology, ICP-MS, energy transition, and rare earth elements
- Subject:
- sedimentology, critical minerals, stratigraphy, and geochemistry
- Creator:
- Gall, Ryan, Morris, Emma, Free, Michael, Fernandez, Diego, Coe, Haley, Fausett, Peyton, Birgenheier, Lauren, Vanden Berg, Michael, and Giebel, Andrew
- Owner:
- Date Uploaded:
- 01/22/2025
- Date Modified:
- 01/27/2025
- Date Created:
- 2022-05-23 to 2024-04-12
- License:
- Public Domain – This data is free of copyright restrictions (e.g. government sponsored data).
- Identifier:
- http://doi.org/10.7278/S5d-xmpj-tq44