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19 results for “Peridotite”
SWIR abyssal peridotites EBSD and microprobe datasets
<p>The crystallographic preferred orientation (CPO) of olivine, pyroxenes, spinel, and amphibole was measured in 17 selected samples using a JEOL JSM 5600 at the Geosciences Montpellier EBSD facility, with 17 kV acceleration voltage and 24 mm working distance. For each thin section, CPO maps covered areas of 4 to 13 cm<sup>2</sup> with a grid step of 15 or 35 µm, depending on olivine minimum grain size. Because of the large size of olivine porphyroclasts in most samples, CPO were measured on several thin sections and then combined. Higher-resolution CPO maps (grid step 0.5 to 10 µm depending on the dominant grain size) of fine-grained zones were also obtained for 7 samples using the CamScan Crystal Probe X500-FEG SEM, also at the Geosciences Montpellier EBSD facility. Post-acquisition treatment consisted in deleting wild spikes and filling non-indexed pixels with ≥ 6 neighbors with coherent orientations with their average orientation. </p> <p>In situ major element concentrations of amphiboles were measured using a Cameca SX-100 electron microprobe (CAMPARIS service, Paris). The accelerating voltage was fixed at 15 kV and beam current at 10 nA. The spot size was 1μm. Counting times were 10 s. Compositions are presented in TableS3.</p>
Compositional Data Analysis (CoDA) of Clinopyroxene from Abyssal Peridotites
<ol> <li> <p>Additional supporting information includes data, R script, and QGIS file supporting the main text:</p> <p><strong>CSV (Data Set)</strong></p> <ul> <li> <p>residual_abyssal_peridotites.csv: Compilations of residual abyssal peridotites (n = 1162) and depleted MORB-mantle (n = 1)</p> </li> <li> <p>residual_abyssal_peridotites_coda_results.csv: Filtered data and results of PCA and k-means clustering (n = 267)</p> </li> <li> <p>model_cpx.csv: Clinopyroxene compositions obtained by open-system melting model</p> </li> <li> <p>test.csv: csv file for testing new data<br> <br> <strong>R</strong></p> </li> <li> <p>abyssal_cpx_pca.Rproj</p> </li> <li> <p>coda.R: R script implemented in this study</p> </li> <li> <p>test_your_data.R: R script to test new data comparing to abyssal clinopyroxenes</p> <p>and modeled clinopyroxenes</p> <p><strong>QGIS</strong></p> </li> <li> <p>residual_abyssal_peridotites.qgz: QGIS using residual_abyssal_peridotites.csv and residual_abyssal_peridotites_coda_results.csv for Figure 1 and Figure S7</p> </li> <li> <p>color_etopo1_ice_low_modified.tiff: ETOPO1 is a 1 arc-minute global relief model of Earth's surface that integrates land topography and ocean bathymetry from NOAA</p> </li> </ul> </li> </ol> <p> </p> <p>2. Instruction</p> <p>We prepared an R script to compare new (your) clinopyroxene data with clinopyroxene from abyssal peridotites. New data will be plotted using the principal components derived from the natural clinopyroxene database presented in this paper.</p> <p>The procedure is as follows:</p> <p>1. add data below the second row in test.csv<br> * Do not change the file name<br> * Do not change the first row<br> * Add clinopyroxene data (10 elements) and its label replacing under 2nd row * Label of data can be sample name, lithology, locality etc.</p> <p>2. Open abyssal_cpx_pca.Rproj by R studio (double click) 3. Open test_your_data.R (double click)<br> 4. Implement test_your_data.R.</p> <p>To use test_your_data.R, first press cmd+A (ctrl+A) and press Run/cmd+enter (ctrl+enter).</p> <p>5. Results files<br> 5-1. abyssalcpx_vs_test.csv: PC1&PC2 values using abyssal clinopyroxene PC coordinates<br> 5-2. plot1.pdf: abyssal clinopyroxene (cluster) vs. test data plot<br> 5-3. plot2.pdf: modeled clinopyroxene vs. test data plot<br> 5-4. spider_cl1.pdf: PM-normalized trace elements patterns of cluster 1 from abyssal peridotites 5-5. spider_cl2.pdf: PM-normalized trace elements patterns of cluster 2 from abyssal peridotites 5-6. spider_cl3.pdf: PM-normalized trace elements patterns of cluster 3 from abyssal peridotites 5-7. spider_cl4.pdf: PM-normalized trace elements patterns of cluster 4 from abyssal peridotites 5-8. spider_test.pdf: PM-normalized trace elements patterns of new data (your data)<br> 5-9. plot3.pdf: Discrimination diagram for clinopyroxene trace elements compositions. PM normalized Sr/Nd ratio vs. Ce/Yb ratio of clinopyroxenes from abyssal peridotites vs. test data</p>
Supporting dataset for manuscript "Direct viscosity measurement of peridotite melt under lower-mantle conditions supports a fractional magma ocean solidification at top lower mantle conditions"
<p>Supporting material for manuscript "<strong>Direct viscosity measurement of peridotite melt under lower-mantle conditions supports a fractional magma ocean solidification at top lower mantle conditions"</strong></p>
Formation of ultra-depleted mantle peridotites and their relationship with boninitic melts: an example from the Kamuikotan Unit, Hokkaido, Japan
<p>Additional Supporting Information</p> <p>table_S1.xlsx: Compilation of the ultra-depleted peridotites<br> table_S1.xlsx: Locations and mineral major and trace elements compositions of the Takadomari and Horokanai ultra-depleted peridotites<br> table_S3.xlsx: Mineral and melt trace elements compositions obtained by our melting models</p> <p>QGIS<br> Geological map of the studied area</p>
Raw data of Monte Carlo (MC) simulations of the transfer Cr flux during abyssal peridotites marine alteration
<p>Raw data of Monte Carlo (MC) simulations were performed, and this MC model is used to quantitatively assess the net transfer flux of Cr between abyssal peridotites and seawater. Given that there are large uncertainties in the parameters. Two thousand MC model runs were performed using randomly selected values of model variables.</p>
Hawaii peridotite xenoliths EBSD data
<p>Crystal-preferred orientations (CPO) map data for spinel-peridotite xenoliths of 48 spinel-peridotites from four localities in three Hawaiian islands: Salt Lake (SAL) and Pali (PAL) in Oahu, Grove Farm (GF) in Kauai, and Pu'uwai (PU) in Nihau. CPO of olivine, pyroxenes, garnet, and spinel were measured at the SEM-EBSD facility at Geosciences Montpellier by indexing of electron back-scattered diffraction (EBSD) patterns produced by interaction of an incident electron beam with a carefully polished thin section tilted at 70° to the electron beam. Measurements were performed in a JEOL JSM 5600 scanning electron microscope using an acceleration voltage of 17 kV and a working distance of 23 mm. Maps covering almost entirely each thin section were obtained using steps between 15 and 35 μm, depending on grain size. Indexing rates ranged between 80 and 90%. Lower indexation rates (70-80%) were obtained for a few peridotites (GF1B2F, GF4), which show some alteration along grain boundaries due to reaction with the host basalt. Orthopyroxene and clinopyroxene were seldom misindexed for one another. Inaccurate mineral determination and misindexing due to olivine pseudo-symmetry were corrected by careful post-acquisition data treatment controlled by comparing EBSD maps and optical microscopy observations.</p> <p> </p>
Supplementary data files for JGR 2021JB022729R, Initial results from the Oman Drilling Project Multi-Borehole Observatory: Petrogenesis and ongoing alteration of mantle peridotite in the weathering horizon
<p>These are the four supplementary data files for a paper accepted in the Journal of Geophysical Research (JGR), "Initial results from the Oman Drilling Project Multi-Borehole Observatory: Petrogenesis and ongoing alteration of mantle peridotite in the weathering horizon", 2021JB022729R, which are being uploaded here in conformance with JGR's requirement that data be placed in an open archive. The date of publication is not yet known, but JGR requires that the data be uploaded when the paper is accepted, so we have used the date of acceptance, November 20, 2021.</p>
FIGURE 4 in Galatella malacitana (Asteraceae): a new species from the peridotitic mountains of southern Spain
FIGURE 4. Metaphase plates: A, Galatella malacitana (GDA 61334); B, Galatella sedifolia (JAEN 742348).
FIGURE 3 in Galatella malacitana (Asteraceae): a new species from the peridotitic mountains of southern Spain
FIGURE 3. SEM micrographs of Galatella malacitana (from the holotype). A, Detail of disc flower showing surface hairs; B, detail of achene showing the strigose-sericeous indumentum and the short-stalked glands.
FIGURE 1. A–D in Galatella malacitana (Asteraceae): a new species from the peridotitic mountains of southern Spain
FIGURE 1. A–D Galatella malacitana (from the holotype). A, Habit; B, capitulum; C, detail of disc flower; D, achene and pappus.
Dataset for the chemistry of primary minerals in serpentinized peridotites from Mado Megamullion in the Shikoku Basin, the Philippine Sea
<p>This dataset comprises of the major element chemistry of spinels, orthopyroxenes, clinopyroxenes and amphiboles and trace element chemistry of clinopyroxenes from the peridotites of the Mado Megamullion.</p> <p> </p>
Fourier transform infrared spectroscopy spectra from North Anatolian fault peridotite xenoliths
<p>Fourier transform infrared spectroscopy spectra from North Anatolian fault peridotite xenoliths.</p>
FIGURE 5 in Galatella malacitana (Asteraceae): a new species from the peridotitic mountains of southern Spain
FIGURE 5. Map of the known populations of Galatella malacitana in the Iberian Peninsula.
FIGURE 2 in Galatella malacitana (Asteraceae): a new species from the peridotitic mountains of southern Spain
FIGURE 2. Galatella malacitana (GDA 61334). A, Detail of synflorescence; B, capitulum.
Carbonic Fluids Drive Continental Carbon Cycling as Revealed by the Geochemistry of the Eclogite-Garnet Peridotite Interface
Open the record for dataset details and reuse information.
Carbonic Fluids Drive Continental Carbon Cycling as Revealed by the Geochemistry of the Eclogite-Garnet Peridotite Interface
Open the record for dataset details and reuse information.
Experimental investigation on the transport of sulfide driven by melt-rock reaction in partially molten peridotite
<p>The statistical results of grain size of olivine, clinopyroxene and sulfide droplets in our experiments</p>
Mantle heterogeneity generated by melt depletion and melt-rock interaction: the West Iberian margin peridotites (ODP Legs 149 and 173)
<p>This database contains mineral major and trace element data from the homonymous manuscript of Secchiari et al (submitted to Journal of Petrology). The study is based on IODP material (rock samples) and deals with a petrological and geochemical investigation of mantle samples drilled in the Iberia Abyssal Plain. More specifically the material comes from ODP Leg 149 (Hole 899 B) and Leg 173 (Holes 1068A and 1070A).</p> <p>The folder contains Table 1 and Supplementary Table material (mineral major and trace element data) of the homonymous manuscript of Secchiari et al. submitted to JPET.<br>Mineral major element data were obtained with EMPA, while trace element data were analyzed using LA-ICP-MS. Further details are provided in the related manuscript.<br>The investigated samples are from ODP Holes 899B, 1068A, and 1070A. The geographic coordinates of the Hole locations are provided below:<br>Hole 899B: Lat: 40.766667, Lon: -12.200000<br>Hole 1068A: Lat: 40.683333, Lon: -11.616667<br>Hole 1070A:Lat: 40.800000, Lon: -12.716667<br>Sample location is provided in Table 1.</p> <p> </p> <p><strong>This research was funded by the Italian Ministry of University and Research (MUR) through the grant “ECORD-IODP Italia 2021” attributed to A. Secchiari.</strong></p>
Supplementary Tables for Cratonization and Destruction History of the Northeastern North China Craton, Evidence from the Re-Os Isotope and Platinum Group Element Characteristics of Peridotite Xenoliths
<p>The whole-rock major, trace, platinum group elements and Re-Os isotopes of CBS and LG peridotites are presented in the Supplementary Tables.</p>
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