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Ferron Sandstone
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stratigraphy
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- 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
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- Description:
- A comprehensive geochemical and stratigraphic study of Cretaceous coal-bearing strata in Utah and western Colorado was performed to evaluate geologic trends in REE-enrichment, as well as elucidate enrichment mechanisms. Preliminary portable X-ray fluorescence (pXRF) analyses (n = 5659) was combined with Inductively Coupled Plasma-Mass Spectrometry (ICP-MS) analyses (n = 135) on particularly REE-enriched samples. Sampling and analyses from active and historic mines as well as nearby cores and outcrops were performed with an emphasis on sedimentary, stratigraphic, geographic, and mining context.
- Keyword:
- critical minerals, Cretaceous period, Mesaverde Group, rare earth elements, energy transition, Ferron Sandstone, Blackhawk Formation, Uinta region, and coal
- Subject:
- economic geology, core analysis, critical minerals , coal resources, nonmetallic mineral resources, sedimentology, and stratigraphy
- Creator:
- Birgenheier, Lauren, Fausett, Peyton, Gall, Ryan, Fernandez, Diego , Giebel, Andrew , Vanden Berg, Michael D., Morris, Emma , Wilcock, Laura , Coe, Haley , and Free, Michael
- Contributor:
- Hoskins, Brittney, Ashurst-McGee, Logan, and Bailey, Nick
- Owner:
- Based Near Label Tesim:
- Salt Lake City, Utah, United States, Uinta Basin, Utah, United States, and Piceance Creek Basin, Colorado, United States
- Language:
- English
- Date Uploaded:
- 12/14/2023
- Date Modified:
- 12/19/2023
- Date Created:
- 2022-05-23 to 2023-08-18
- License:
- Public Domain – This data is free of copyright restrictions (e.g. government sponsored data).
- Resource Type:
- Dataset
- Identifier:
- https://www.doi.org/10.7278/S50d-08s4-3d7j