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16 results for “LA-ICP-MS”
Supplement to "The virtual spot approach: a simple method for image U-Pb carbonate geochronology by high-repetition rate LA-ICP-MS" by Hoareau et al
<p>This repository contains supplementary data, excel datasets and python / R codes as supplement to the publication by Hoareau et al.</p> <p>Files are:</p> <ul> <li>pdf with Supplementary material (S1 to S6)</li> <li>Excel spreadsheet with all image ratio and CPS data (Table S7)</li> <li>Iolite4 python plugin for virtual spot calculation (Iolite4_plugin_virtual_spot.py)</li> <li>Jupyter .ipynb file for U-Pb age calculation (Multiage.ipynb, R language)</li> <li>Jupyter .ipynb file for cp-sat minimum rectangle problem calculation (Rects.ipynb, Python language)</li> </ul>
Dataset for publication "Multi-phase quantitative compositional mapping by LA-ICP-MS: analytical approach and data reduction protocol implemented in XMapTools"
<p>Datasets for the publication "Multi-phase quantitative compositional mapping by LA-ICP-MS: analytical approach and data reduction in XMapTools"</p>
LA-ICP-MS data files
<p>These are the data files needed to recreate the LA-ICP-MS trace element maps of steatite accessory minerals as presented in my MPhil thesis: <em>Chmielowski, R. M. (2024). Viking Age Steatite in Sweden: Accessory Mineral Provenancing and the Biographical Approach, Durham University. </em></p> <p>The target user is anyone who wishes to compare this data with their own archaeological research results to determine the provenance of steatite artefacts. However, this data set would also lend itself well as part of a study to investigate the geologic history and/or metamorphic fluid flow studies in these areas. Furthermore, this dataset would lend itself well as a practice set for students learning to process LA-ICP-MS data to produce trace element composition maps of single crystals in a rock matrix as it contains a variety of mineral types and different types of crystal zoning. In all cases see the thesis itself for information about the context of the data sets, and for images of the maps I created with this raw data.</p> <p>There are 32 folders, one for each trace element map created [there is no sample map M30, as it proved not to be steatite].</p> <p>It is not recommended to attempt to read the .csv files yourself. Best results are obtained using a program such as Iolite4 <https://iolite.xyz/> to read and interact with the files. </p> <p>Each folder contains:</p> <ul> <li><strong>A back-scatter electron image, in .jpg format</strong>, of the mapped sample area, with a file name in the format of M1, M2, etc., were “M1” is the name of the trace element map as used in this thesis. Where possible this image was taken before the laser ablation session. If there is no “before” image then the provided jpg was taken after laser ablation.</li> <li><strong>A folder of .csv data files from the ICP-MS</strong>, where the folder name takes the format “M1 ICP-MS files”, “M2 ICP-MS files”, etc., were “M1” is the name of the trace element map as used in this thesis. <ul> <li>The individual ICP-MS data files are in .csv format, and were named automatically by the ICP-MS computer. </li> <li>Their names take the form of “2019-04-20sulphidemap_1”, where the numbers give the date of the experiment laser ablation session, the text gives the name for the experiment used on the day, and the number after the underscore shows where in the sequence of the files a given file takes.</li> <li>The first and final set of these files correspond to the “Standards”, the laser ablation of the standard reference materials and “blanks” (laser firing, but at zero percent power, so that the ICP-MS is measuring the “background” levels of the day). There are typically, but not always 10 files for each set of standards: <ul> <li> one blank</li> <li>followed by two spots of the standard reference material (SRM) “Nist612”</li> <li>followed by a blank</li> <li>followed by two spots of the SRM “MASS1”</li> <li>followed by a blank</li> <li>followed by two spots of SRM “Fe-S1”</li> <li>followed by one blank.</li> </ul> </li> <li>Between the standards is the map data, with each file containing the total ICP-MS analysis collected during an interval of time that was slightly longer than needed to laser ablate one row of the map. Because the ICP-MS starts analysing before the laser starts firing, and continues after it stops, each of these files have an additional “blank” period before and after the line. (Save for one example where the ICP-MS stopped early for for several rows of data.)<br>Each of these files starts with a header section which records the name of the line, the date, and various settings of the ICP-MS. Below that is the actual comma separated data showing the time stamp, and the measured counts per second for each analysed elements.</li> </ul> </li> <li><strong>A folder of .csv data of laser log files</strong>, from the laser computer, where the folder name takes the format “M1 laser log files”, “M2 laser log files”, etc., were “M1” is the name of the trace element map as used in this thesis. <ul> <li>The individual data files are in .csv format, and their file names were generated automatically by the laser computer, and take the form of “ScanLog_19-04-30_09-02-45”, where the first set of numbers is a date stamp (year, month day), and the second set of numbers is a time stamp (hour, minutes, and seconds).</li> <li>The files themselves contain a series of time stamps that correspond to each time the laser fired for a specific “spot” or “line”, the cosponsoring X-Y position (in µm) of the laser stage at that moment in time, details about the laser spot size and speed of movement.</li> </ul> </li> </ul> <p>If you use this data please let me know, I would love to hear if it is being used for archaeological, geological, or educational, or other purposes.</p>
X-ray diffraction data, crystallographic information file, infrared spectra, and LA-ICP-MS depthprofiles of davemaoite
<p>Calcium silicate perovskite, CaSiO3, is arguably the most geochemically important phase in the lower mantle, because it concentrates elements that are incompatible in the upper mantle, including the heat-generating elements thorium and uranium, which have half-lives longer than the geologic history of Earth. We report CaSiO3-perovskite as an approved mineral (IMA2020-12a) with the name davemaoite. The natural specimen of davemaoite proves the existence of compositional heterogeneity within the lower mantle. Our observations indicate that davemaoite also hosts potassium in addition to uranium and thorium in its structure. Hence, the regional and global abundances of davemaoite influence the heat budget of the deep mantle, where the mineral is thermodynamically stable.</p>
Compilation of LA-ICP-MS data from published literature of SMS and VMS deposits
<p>Compilation of LA-ICP-MS data from published literature of SMS and VMS deposits. Data was compiled as part of a PhD thesis by Hannah L. J. Grant (University of Kiel, 2019). References are contained within the file.</p>
LA-ICP-MS line scan data and time-series analysis outputs for Baltic Sea sediment core F80
<p>The datafile contains two sheets: HTM and MCA, corresponding to geochemical data from the Holocene Thermal Maximum and Medieval Climate Anomaly intervals, respectively, of a sediment core from the Baltic Sea (site F80, 58°00.00N, 19°53.81E, water depth 191m, Fårö Deep, collected during the HYPER/COMBINE cruise of R/V Aranda, May/June 2009). In each sheet, columns A-J contain Laser Ablation (LA)-ICP-MS line scan data of element ratios in resin-embedded sediment (Mo/Al, Fe/Al and Br/P) presented in the time domain (Age in years BP). Dating of the sediment core is described in the accompanying manuscript and references therein. These profiles are presented in three forms: Raw= raw data resampled to 1 year resolution; Det= detrended and normalized to unit variance; Gau; Gaussian bandpass filter at a period of 20-100 years. Columns L-S contain time-series analysis results of the detrended, normalized elemental ratios in period domain, including power spectra of each ratio (Blackman-Tukey window, columns M-O) and cross-spectral analysis (Blackman-Tukey window, bandwidth 5 years) of Mo/Al vs Br/P (columns P-Q) and Mo/Al vs Fe/Al (columns R-S), respectively. All analyses were performed in Analyseries 1.1.1 (Paillard et al., 1996). Figures containing the data have been submitted as part of a manuscript to Geophysical Research Letters (Jilbert et al., forthcoming),</p> <p> </p> <p>Paillard, D., Labeyrie, L., & Yiou, P. (1996). Macintosh program performs time‐series analysis. <em>Eos, Transactions American Geophysical Union</em>,<em> 77</em>(39), 379-379. <a href="https://doi.org/10.1029/96EO00259">https://doi.org/10.1029/96EO00259</a></p> <p>Jilbert, T., Gustafsson, B.G., Veldhuijzen, S., Reed, D.C., van Helmond, N.A.G.M., Hermans, M., & Slomp, C.P (forthcoming). Iron-phosphorus feedbacks drive multidecadal oscillations in Baltic Sea hypoxia. Submitted to <em>Geophysical Research Letters</em></p>
LA-ICP-MS/MS-based Rb-Sr isotope mappings for geochronology
<p>This is a complementary dataset to the publication LA-ICP-MS/MS-based Rb-Sr isotope mappings for geochronology by Martin Kutzschbach & Johannes Glodny.</p> <p>It contains both raw and corrected isotope ratios of reference materials and sample of all six sessions. Furthermore, the dataset includes Rb/Sr isotope ratios and Rb-Sr ages for every individual pixel within the mica segments outlined in the mappings. Additionally, high-resolution, unedited elemental maps, isotope ratio maps, and Rb-Sr age maps are provided for GER2B, Wil1A, and GÄD08</p>
Neogloboquadrina pachyderma LA-ICP-MS spectral files and stable isotope data from: Geochemical differences between alive, uncrusted and dead, crusted shells of Neogloboquadrina pachyderma: Implications for paleoreconstruction
<p>Planktic foraminiferal-based trace element-calcium ratios (TE/Ca) are a cornerstone in paleoceanographic reconstructions. While TE-environment calibrations are often established through culturing experiments, shell growth in culture is not always consistent with growth in a natural setting. For example, many species of planktic foraminifera thicken their shell at the end of their life cycle, producing a distinct 'gametogenic' crust. Crust is common in fossil foraminifers, however, shells grown in culture do not often develop a thick crust. Here we investigate potential vital effects associated with the crusting process by comparing the trace element (Mg/Ca, Na/Ca, Ba/Ca, Sr/Ca, Mn/Ca, Zn/Ca) and stable isotope (δ<sup>13</sup>C, δ<sup>18</sup>O) composition of alive, fully mature, uncrusted shells to recently deceased, crusted shells of <em>Neogloboquadrina pachyderma</em> collected from the same plankton tows off the Oregon (USA) coast. We find that uncrusted (N = 55) shells yield significantly higher Ba/Ca, Na/Ca, Mn/Ca, and Sr/Ca than crusted (N = 66) shells, and crust calcite records significantly lower TE/Ca values for all elements examined. Isotopic mixing models suggest that the crust calcite accounts for ~40 to 70% of crusted shell volume. Comparison of foraminiferal and seawater isotopes indicate that <em>N. pachyderma</em> lives in the upper 90 m of the water column, and that crust formation occurs slightly deeper than their average living depth habitat. Results highlight the necessity to establish calibrations from crusted shells, as application of calibrations from TE-enriched uncrusted shells may yield attenuated or misleading paleoceanographic reconstructions.</p>
Neogloboquadrina pachyderma LA-ICP-MS spectral files and stable isotope data from: Geochemical differences between alive, uncrusted and dead, crusted shells of Neogloboquadrina pachyderma: Implications for paleoreconstruction
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X-ray diffraction data, crystallographic information file, infrared spectra, and LA-ICP-MS depthprofiles of davemaoite
Open the record for dataset details and reuse information.
LA-ICP-MS data of the Chongce ice core
<p>LA-ICP-MS data of the Chongce ice core</p>
U-Pb-Th SHRIMP & LA-ICP-MS complementary data of "The bimodal Fii-A2-type and calc-alkaline volcanic sequence of the Aljustrel brownfield region, Iberian Pyrite Belt, SW Iberian Massif"
<p>U-Pb-Th complementary data of "The bimodal Fii-A2-type and calc-alkaline volcanic sequence of the Aljustrel brownfield region, Iberian Pyrite Belt, SW Iberian Massif" <a title="Persistent link using digital object identifier" href="https://doi.org/10.1016/j.chemer.2023.126049" target="_blank" rel="noreferrer noopener"><span><span>https://doi.org/10.1016/j.chemer.2023.126049</span></span></a></p>
LA-ICP-MS U-Pb and Lu-Hf data for Bighorn Basin bentonite zircon
<p>This table contains the U-Pb composition, calculated ages, and Lu-Hf composition for 697 individual zircon analyses from a suite of bentonite deposits collected from the Bighorn Basin, Wyoming, and southwestern South Dakota. All data was acquired using LA-ICP-Ms at the Laserchron Center at the University of Arizona.</p>
Table S1: Concentrations of trace elements (ppm) in sulfides from Darasun, Talatuy and Teremki by LA-ICP-M; Table S2: The results of the RSM measurements for estimation of accuracy and precision of the LA-ICP-MS analysis
<p>Data set</p>
EPMA and LA-ICP-MS raw data supporting Vieira Duarte et al. (2023)
<p>These datasets include EPMA and LA-ICP-MS raw data supporting the study published at <em><strong>Contributions in Mineralogy and Petrology</strong></em>, entitled "<strong>Oxide-silicate petrology and geochemistry of subducted hydrous ultramafic rocks beyond antigorite dehydration (Central Alps, Switzerland)</strong>". </p> <p> </p> <p> </p>
Supplementary Tables - U-Pb direct dating on calcite paleosol nodules by LA-ICP-MS mapping: first absolute age constraints on the Miocene continental succession of the Paris Basin
<p>Supplementary data table from the manuscript U-Pb direct dating on calcite paleosol nodules by LA-ICP-MS mapping: first absolute age constraints on the Miocene continental succession of the Paris Basin.</p> <p>For each table, the processed data of chemical and isotopic composition is presented along with criteria used to define the ROI, pooling channel, information on map size and relevant pictures of map and ROI selection. Geochronology results are presented in the three system mentioned in the method part of the manuscript.</p> <p>In each file the first thumbnail is the results of QC material DBT, while the second thumbnail is the sample, if there is more than two thumbnail, that mean that the sample provided multiple zonations which were datable.</p>
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