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14 results for “Clay mineral”
Data from: Brine driven destruction of clay minerals in Gale crater, Mars
<p><span><span><span><span><span><span><span><span><span><span><span>This repository contains files and non-commercial software associated with the journal article "Brine Driven Destruction of Clay Minerals in Gale Crater, Mars.<strong>" </strong></span></span></span></span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span><span><span><span><span>The article presents mineralogical, geochemical, and sedimentological observations made by the Mars Science Laboratory rover <em>Curiosity </em>in an area called Glen Torridon, Gale crater, Mars. Rocks exposed in Glen Torridon were deposited in a lake that occupied the floor of Gale crater about 3.5 billion years ago and are stratigraphic and depositional equivalents of rocks exposed ~ 400m away on Vera Rubin ridge. The mineralogy of rocks in these two areas are different despite forming in the same lake at the same time. Glen Torridon rocks contain about 30 wt % clay minerals and 2 wt % or less of the mineral hematite (an iron oxide). In contrast, Vera Rubin ridge rocks contain 5 to 13 wt % clay minerals, with larger quantities (between 9 and 16 wt %) of iron oxide and oxyhydroxide minerals. The observed differences in mineralogy are attributed to preferential post-depositional alteration of Vera Rubin ridge rocks by silica-poor brines. These brines are thought to have formed during the deposition of sedimentary strata of the 'sulfate-bearing unit' that overlie Glen Torridon and Vera Rubin ridge rocks. Orbital spacecraft have detected magnesium sulfates in the sulfate-bearing unit. The presence of these highly soluable salts imply that changing climate and/or hydrological conditions in Gale crater resulted in the formation of dense brines during deposition of the sulfate-bearing unit. It is hypothesized that brines infiltrated older clay-bearing sediments, converting iron-rich clay minerals to iron oxides and oxyhydroxides. Glen Torridon rocks also contain a mineral phase not previously identified on the mission. This mineral gives rise to a distinctive x-ray diffraction peak represents a interplanar spacing of 9.22 angstroms. This phase is identified as a mixed-layer serpentine-talc and is thought to have been transported into the crater floor by rivers.</span></span></span></span></span></span></span></span></span></span></span></p> <p>This repository contains:</p> <p>- Files needed to perform mineral search and Rietveld refinement of measured x-ray diffraction data using <span><span><span><span><span><span><span><span><span><span><span>BGMN and MDI Jade software.</span></span></span></span></span></span></span></span></span></span></span> </p> <p>- A non-commerical Excel-based program called FULLPAT, used for mineral and x-ray amorphous quantification of x-ray diffraction patterns collected by the CheMin instrument aboard <em>Curiosity. </em></p> <p><em>- </em>Python code that was used to identify the 9.22 angstrom phase through automated search the American Mineralogist Crystal Structure Database.</p> <p>- Collection times of Alpha Particle X-ray Spectrometer analyses of bulk rock geochemical presented in the article that can be used to retrieve raw data from NASA's Planetary Data system (<span><span><span><span><span><span><span><span><span><span><span>https://pds-geosciences.wustl.edu/msl/msl-m-apxs-4_5-rdr-v1/mslapx_1xxx/extras/)</span></span></span></span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span><span><span><span><span>- A compilation of Li abundances across Vera Rubin ridge and Glen Torridon measured by the ChemCam that were presented in the article and used as a proxy for rock clay mineral content.</span></span></span></span></span></span></span></span></span></span></span></p>
Data from: Brine driven destruction of clay minerals in Gale crater, Mars
Open the record for dataset details and reuse information.
data for [Magnetostratigraphic evidence for post-depositional disruption of osmium isotopic records in pelagic clay and its implications for mineral flux estimates]
<p>Data produced in <em>Magnetostratigraphic evidence for post-depositional disruption of osmium isotopic records in pelagic clay and its implications for mineral flux estimates</em></p>
Observed data, predictions and uncertainty associated with the updated distribution of clay minerals in the World Ocean
<p>Sparase observed data for various clay mineral species are .csv file format.</p> <p>Predictions and uncertainty for four seafloor clay mineral species (relative percentages, Kaolinite, Illite, Smectite, Chlorite) are generated via geospatial machine learning (GML). Methodology is outlined in "The updated distribution of clay mineral in the World Ocean"<span>. These files are in net-CDF file format. Files are cell-centered. Further, latitudes and longitudes of grid cells are denoted in the variables of the .nc files.</span></p>
Clay minerals control rare earth elements (REE) fractionation in Brazilian mangrove soils
<p>XRD data from different size fractions of Brazilian mangrove soils, supporting the manuscript entitled <strong><em>Clay minerals control rare earth elements (REE) fractionation in Brazilian mangrove soils, </em></strong>submitted to the journal <strong><em>Catena</em>.</strong></p>
Viscoelasticity modeling of clay minerals by dynamic viscoelasticity measurement and its implications for earthquake faulting
<p>We conducted dynamic viscoelastic measurements on three clay minerals, kaolinite, illite and smectite with water. These concentrated (dense) suspension systems of clay minerals were investigated using a high-temperature and high-fluid-pressure rheometer to determine their viscoelastic properties, which help further the understanding of tectonic and non-tectonic phenomena in the shallow unconsolidated portion of the lithosphere. Our results suggested that the rheological properties resulting from the network structure of the clay mineral were temperature, pressure and peak shear strain rate dependent. In addition, it was observed during this study that the amount of change in the phase angle varied systematically with the type of clay mineral. This suggests that the viscoelastic behaviour of unconsolidated systems saturated with fluid varies with the type of clay minerals that compose it. (Abstract)</p>
Dataset for publication Chougan M., Ghaffar S.H., Nematollahi B., Sikora P., Dorn T., Stephan D., Albar A., Al-Kheeta M.J. Effect of natural and calcined halloysite clay minerals as low-cost additives on the performance of 3D-printed alkali-activated materials. Materials and Design (2022) 223, 111183
<p>Open dataset for publication Chougan M., Ghaffar S.H., Nematollahi B., Sikora P., Dorn T., Stephan D., Albar A., Al-Kheeta M.J. Effect of natural and calcined halloysite clay minerals as low-cost additives on the performance of 3D-printed alkali-activated materials. <strong>Materials and Design</strong> (2022) 223, 111183. <a href="https://doi.org/10.1016/j.matdes.2022.111183">https://doi.org/10.1016/j.matdes.2022.111183</a></p> <p>File 1 - FTIR - data of raw and calcined material - *.opj (Origin)</p> <p>File 2 - Mechanical performance print vs cast - *.opj (Origin)</p> <p>File 3 - Mechanical performance - *.opj (Origin)</p> <p>File 4 - TGA and XRD - data of raw and calcined material - *.opju</p>
Effect of cement on the consolidation behavior of marine clay in comparison with clay minerals
<p>This is data for paper ""<strong>Effect of cement on the consolidation behavior of marine clay in comparison with clay minerals</strong></p>
X-ray diffraction (XRD) measurement of bulk and clay mineral composition at India National Gas Hydrate Program 01 (NGHP-01) Sites on the Indian continental margin (Krishna-Godavari Basin, Kerala-Konkan Basin, Mahanadi Basin, Andaman Sea)
<p>This dataset contains bulk and clay mineral relative abundances measured by X-ray diffraction (XRD) measured at 12 offshore sites drilled and cored during the Indian National Gas Hydrate Program 01 (NGHP-01) in 2006 by the JOIDES Resolution. Sediment samples from from the Kerala-Konkan Basin, Arabian Sea (Hole 01A), the Krishna-Godavari Basin, Bay of Bengal (Holes 03B, 05C, 07BD, 10BD, 14A, 15A, 16A, 20AB), the Andaman Sea (Hole 17A), and the Mahanadi Basin, Bay of Bengal (Holes 18A, 19A) were measured for bulk and clay XRD at the University of Missouri using a Scintag Pad V X-ray diffractometer.</p> <p>These sites are between 895 and 2663 m of water depth and were from drilled to depths between 172 and 675 m below seafloor. These data were published in:</p> <p><strong>Phillips, S.C., Johnson, J.E., Underwood, M.B., Guo, J., Giosan, L., and Rose, K., 2014. Long-timescale variation in bulk and clay mineral composition of Indian continental margin sediments in the Bay of Bengal, Andaman Sea, and Arabian Sea. <em>Marine and Petroleum Geology</em> 58A, 117-138, https://doi.org/10.1016/j.marpetgeo.2014.06.018 <a href="https://doi.org/10.1016/j.marpetgeo.2014.06.018">Link</a></strong></p> <p>Samples were collected at a resolution of approximately 1 per core. Four-component relative abundances (total clay, quartz, feldspar, calcite) of bulk sediment powders were calculated using a singular value decomposition (Fisher and Underwood, 1995). Clay fractions were prepared using the filter peel method and 0.45-mm membranes, and saturated with ethylene glycol (Moore and Reynolds, 1997). Clay mineral relative abundances (illite, smectite, kaolinite, chlorite) were calculated using the method of Biscaye (1965) for comparison with previously measured studies from the Indian Ocean. See Phillips et al. (2014) for additional information.</p> <p>References:</p> <p>Biscaye, P.E., 1965. Mineralogy and sedimentation of recent deep-sea clay in the Atlantic Ocean and adjacent seas and oceans. <em>Geological Society of America Bulletin</em>. 76, 803-832. https://doi.org/10.1130/0016-7606(1965)76[803:MASORD]2.0.CO;2</p> <p>Fisher, A.T., Underwood, M.B., 1995. Calibration of an X-ray diffraction method to determine relative mineral abundances in bulk powders using matrix singular value decomposition: a test from the Barbados accretionary complex. In: Shipley, T.H., Ogawa, Y., Blum, P. (Eds.), <em>Proceedings of the Ocean Drilling Program, Initial Reports</em>, vol. 156, pp. 29-37. doi:10.2973/odp.proc.ir.156.103.1995</p> <p>Moore, D.M., Reynolds, R.C., 1997. X-ray <em>Diffraction and the Identification and Analysis of Clay Minerals</em>, second ed. Oxford University Press, New York.</p> <p>Phillips, S.C., Johnson, J.E., Underwood, M.B., Guo, J., Giosan, L., and Rose, K., 2014. Long-timescale variation in bulk and clay mineral composition of Indian continental margin sediments in the Bay of Bengal, Andaman Sea, and Arabian Sea. <em>Marine and Petroleum Geology</em> 58A, 117-138, https://doi.org/10.1016/j.marpetgeo.2014.06.018</p>
Distribution of Rare Earth Elements and Implication for Ce anomalies in the Clay-Sized Minerals of Deep-sea Sediment, Western Pacific Ocean
<p>西太平洋深海沉积物粘土大小矿物稀土元素分布及对Ce异常的影响</p>
The Cosmetic Effect of Mineral Clay Masks
ClinicalTrials.gov study NCT05041465. IPD Sharing: UNDECIDED. Countries: 1. Publications: 0.
Regulation of gene expression by clay minerals
GEO Series GSE125524. Pseudomonas aeruginosa PAO1. 5 samples. Type: Expression profiling by high throughput sequencing.
Clay minerals data of ODP Site 758 from the southern Bay of Bengal
<p>Dear Sir/Madam,</p> <p>Here we upload the Clay minerals data of ODP Site 758 from the southern Bay of Bengal. The dataset-related manuscript has been submitted to G-Cubed journal for review and possible publication. This is a important research as it represent the oldest continuous weathering record from the Himalayan orogen, which extends to the late Eocene. </p> <p>Best wishes,</p> <p>Shiming Wan</p>
1501-clay minerals
<p>This dataset are part of our manuscript about sediment provenance and river evolution since 35 Ma. This ms is under review by G-cubed journal.</p>
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