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52 results for “Paleomagnetism”
Paleomagnetic data for Beaver, Kent & Dalziel in Tectonics (2022), "Paleomagnetic Constraints From South Georgia On The Tectonic Reconstruction Of The Early Cretaceous Rocas Verdes Marginal Basin System Of Southernmost South America"
<p>Text data files of paleomagnetic data from Tables in: Beaver, D. G., D. V. Kent, and I. W. D. Dalziel (2022), Paleomagnetic Constraints From South Georgia On The Tectonic Reconstruction Of The Early Cretaceous Rocas Verdes Marginal Basin System Of Southernmost South America: Tectonics, in press.</p> <p><strong>Table 1.</strong> Site Mean Stable Paleomagnetic Directions from South Georgia.</p> <p><strong>Table 2.</strong> Site Mean Stable Directions for Differential Tilt Test of South Georgia Sites With Structural Control.</p> <p><strong>Table 3.</strong> Tectonic Rotations Inferred from Available Paleomagnetic Results from Rocas Verde Rock Units of Late Cretaceous Age in Fuegian Andes and South Georgia.<br> </p>
Paleomagnetic Evidence of the Deformation of the Pontides during the closure of the Intra-Pontide Ocean in the Early Cretaceous
<p>Several models exist concerning the deformation history of the Pontides in North Anatolia during the Cretaceous period, which vary depending on the positions of the Istanbul and Sakarya zones, the consumption of the northern branches of the Neotethys ocean and the rifting of several sub-basins. Notably, the early Cretaceous tectonic history of the Pontides involved the closure of the northern Neotethys ocean (Intra-Pontide ocean), and the collision between the Istanbul and Sakarya zones, producing thrust structures along the collisional front. The lack of paleomagnetic data providing evidence for this deformation pattern demonstrates that further investigation is required, particularly focusing on the Lower Cretaceous strata in the Pontides. Thus, the present study aimed to examine samples from a total of 78 sites from the Lower-Upper Cretaceous sedimentary rocks, and Middle Eocene to Middle Miocene sedimentary and volcanic rocks. Results of the present study indicated large counter-clockwise rotations up to R±DR=<strong>-</strong>73.9°±9.1°, and small clockwise rotations of R±DR= 14.2°±12.2° in the Istanbul and Sakarya zones, during the Early Cretaceous and Late Cretaceous periods. These rotation patterns are accompanied by the closure of the Intra-Pontide ocean, and the collision between the Istanbul and Sakarya zones during the Early and Late Cretaceous periods. On the other hand, in the Middle Eocene, small counter-clockwise rotations of R±DR=-6.4°±13.9° and R±DR=4.6°±12.9° along the western coastline of the Pontides indicated that the northern margin of the Pontides was stable during this period.</p>
Calcite U-Pb geochronology and paleomagnetism reveal Mesozoic multi-episodic remagnetizations from the Penglaitan GSSP section, South China
<p>The Supplementary S1 includes: Supplemental Figure S1-4 and Tables S1.</p> <p>The Supplementary S2 is the raw data of in-situ calcite U-Pb dating.</p>
Paleomagnetic directions, anisotropy of magnetic susceptibility (AMS), and anisotropy of anhysteretic remanent magnetization (AARM) from IODP Sites U1507 and U1511 (Exp. 371, Tasman Sea).
<p>We present here paleomagnetic and magnetic anisotropy data from International Ocean Discovery Program (IODP) Sites U1507 and U1511 (Expedition 371, Tasman Sea). Data consist of three tables that contain: (1) the characteristic remanent magnetization (ChRM) directions, before and after correction for inclination flattening of magnetic remanence, for both sites (Table S2); (2) the anisotropy of magnetic susceptibility (AMS) data from Site U1507 (Table S3); (3) the anisotropy of anhysteretic remanence (AARM) from Site U1507 (Table S4).</p>
Text-fig. 1. Map of the Za Hájovnou Cave with Section Nos. 1 and 2 (surveyed by M. Vaněk, status in 2005). in New Updated Results Of Paleomagnetic Dating Of Cave Deposits Exposed In Za Hájovnou Cave, Javoříčko Karst
Text-fig. 1. Map of the Za Hájovnou Cave with Section Nos. 1 and 2 (surveyed by M. Vaněk, status in 2005).
Text-fig. 7. Projection of the declinations and inclinations of primary component of the DRM vectors and a mean direction based on Fisher statistics A – samples with normal polarity (down - projection on the lower hemisphere), B – samples with reversed polarity (up - projection on the upper hemisphere). in New Updated Results Of Paleomagnetic Dating Of Cave Deposits Exposed In Za Hájovnou Cave, Javoříčko Karst
Text-fig. 7. Projection of the declinations and inclinations of primary component of the DRM vectors and a mean direction based on Fisher statistics A – samples with normal polarity (down - projection on the lower hemisphere), B – samples with reversed polarity (up - projection on the upper hemisphere).
Text-fig. 3. Cave deposits exposed in Section No. 2 and recorded paleomagnetic polarities. 1 – reworked deposits; 2 – clayey silt, light brown with abundant black dots, structureless; 3 – clayey silt to silty clay, brown, chaotically deposited; 4 – clayey silt, light brown, structureless; 5 – clayey silt, light brown, laminated; 6 – clayey silt to silty clay, brown, structureless; 7 – clayey silt to silty clay, light brown, structureless; 8 – clayey silt, brown with abundant white carbonate clasts; 9 – clayey sandy silt, brown with abundant lighter clayey fragments; 10 – clayey sandy silt, brown with sporadic lighter clayey fragments. Geomagnetic polarity scale: black (N) – normal polarities, white (R) – reversed polarities, grey – intermediate or uninterpretable polarities. For more details see text. in New Updated Results Of Paleomagnetic Dating Of Cave Deposits Exposed In Za Hájovnou Cave, Javoříčko Karst
Text-fig. 3. Cave deposits exposed in Section No. 2 and recorded paleomagnetic polarities. 1 – reworked deposits; 2 – clayey silt, light brown with abundant black dots, structureless; 3 – clayey silt to silty clay, brown, chaotically deposited; 4 – clayey silt, light brown, structureless; 5 – clayey silt, light brown, laminated; 6 – clayey silt to silty clay, brown, structureless; 7 – clayey silt to silty clay, light brown, structureless; 8 – clayey silt, brown with abundant white carbonate clasts; 9 – clayey sandy silt, brown with abundant lighter clayey fragments; 10 – clayey sandy silt, brown with sporadic lighter clayey fragments. Geomagnetic polarity scale: black (N) – normal polarities, white (R) – reversed polarities, grey – intermediate or uninterpretable polarities. For more details see text.
Scanned data in support of "Paleomagnetic Stratigraphy, Rates of Deposition and Tephachronology in North Pacific Deep-Sea Sediments"
<p>Data files contain paleomagnetic data in an archival format, scanned into PDF documents. Data files contain 11 columns and include:</p> <p>Column 1) Sample identifier with cruise, core, and sample depth</p> <p>Column 2) Demagnetization field or temperature</p> <p>Column 3) Sample Magnetization</p> <p>Column 8) Declination</p> <p>Column 9) Inclination</p> <p> </p> <p>PDFs include paleomagnetic data for:</p> <p>V20-107</p> <p>V20-108</p> <p>V20-109</p> <p>V20-119</p> <p>V20-120</p> <p>V20-121</p> <p>V20-122</p> <p>V20-123</p> <p>V20-124</p> <p>V20-125</p> <p>V20-126</p> <p>V20-127</p> <p>V20-128</p> <p>V20-129</p> <p>V20-130 (missing data sheet PDF)</p> <p>V20-131</p> <p> </p>
Scanned data in support of "Paleomagnetic Study of Antarctic Deep-Sea Cores: Paleomagnetic study of sediments in a revolutionary method of dating events in Earth's History"
<p>Data files contain paleomagnetic data in an archival format, scanned into PDF documents. Data files contain 11 columns and include:</p> <p>Column 1) Sample identifier with cruise, core, and sample depth</p> <p>Column 2) Demagnetization field or temperature</p> <p>Column 3) Sample Magnetization</p> <p>Column 8) Declination</p> <p>Column 9) Inclination</p> <p> </p> <p>PDFs include paleomagnetic data for:</p> <p>V16-132</p> <p>V16-133</p> <p>V16-134</p> <p>V18-72</p> <p>V16-57</p> <p>V16-60</p> <p>V16-66</p>
Data for [Identification of paleomagnetic remanence carriers in ca. 3.47 Ga dacite from the Duffer Formation, the Pilbara Craton]
<p>Data used in the manuscript [Identification of paleomagnetic remanence carriers in ca. 3.47 Ga dacite from the Duffer Formation, the Pilbara Craton] by Usui et al., Physics of the Earth and Planetary Interiors.</p>
Paleomagnetic data associated to publication "Latest Barremian - early Aptian chronostratigraphy and sedimentary evolution of the northwestern Maestrat Basin", Geologica Acta
<p>The data set includes paleomagnetic files in 2G and rs3 format of Th and AF demagnetizations of the NRM, as well as tables with directions of the ChRM and associated data.</p>
Post-50 Ma evolution of India-Asia collision zone from paleomagnetic and GPS data: Greater India indentation to eastward Tibet flow
<p>Review of paleomagnetic data from Tibet and N Indochina, supporting the paper "Post-50 Ma evolution of India-Asia collision zone from paleomagnetic and GPS data: Greater India indentation to eastward Tibet flow".</p>
Rock-magnetic, paleomagnetic and multimethod paleointensity data from an upper Miocene lava flow sequence from São Vicente (Cape Verde)
<p>The folder “Praia Grande Paleomagnetism Data.zip” contains paleomagnetic thermal and alternating field demagnetisation data obtained on upper Miocene volcanic rocks from São Vicente (Cape Verde). Measurements were performed in the paleomagnetic laboratory of the University of Burgos (Spain). Data are in .txt format with the extension .rs3. Columns are separated by empty spaces. Data can be visualised and analysed with the Remasoft software (Chadima and Hrouda, 2006).</p> <p>The folder “Praia Grande rock magnetism Data.zip” contains data in .txt format of IRM acquisition curves (extension .irm), hysteresis curves (extension .hys), backfield curves (extension .coe) and thermomagnetic magnetisation versus temperature curves (extension .rmp) obtained on upper Miocene volcanic rocks from São Vicente (Cape Verde). Measurements were performed in the paleomagnetic laboratory of the University of Burgos (Spain). Columns are separated by tabs. Data can be visualised and analysed with the RockMagAnalyzer 1.0 software (Leonhardt, 2006).</p> <p>The folder “Praia Grande Thellier-Coe Data.zip”contains paleointensity determination data obtained with the Thellier-Coe method on upper Miocene volcanic rocks from São Vicente (Cape Verde). Measurements were performed in the paleomagnetic laboratory of the University of Burgos (Spain). Data are in .txt format with the extension .tdt separated by tabs. Data can be visualised and analysed with the ThellierTool software (Leonhardt et al.,2004).</p> <p>The folder “Praia Grande Multispecimen.zip” contains paleointensity determination data on upper Miocene volcanic rocks from São Vicente (Cape Verde) obtained with the multispecimen method (Biggin and Poidras, 2006; Dekkers and Böhnel, 2006; Fabian and Leonhardt, 2010) at Laboratorio Interinstitucional de Magnetismo Natural, Instituto de Geofísica, Unidad Michoacán, UNAM, Mexico. Two kinds of files can be found: Five .txt files (M0.txt, M1.txt, M2.txt, M3.txt, M4.txt) and five .jr6 files (M0.jr6, M1.jr6, M2.jr6, M3.jr6, M4.jr6). Both types of files are in .txt format. The .txt files directly provide the measurement data generated during the multispecimen experiments. The first columns of the .jr6 files display the following information: column 1: specimen name; column 2: experimental step (explanation below); columns 3, 4 and 5: three magnetisation components M(x), M(y) and M(z); column 6: exponent of the magnetisation components to obtain the magnetisation value in A/m. In the multispecimen experiments, the specimen-name (e.g. PRG1-3) can be divided in two parts, the first three characters indicate the sample (flow), the last character the specimen number (1 to 7). Eight different experimental steps (column 2) can be distinguished: NRM, A10, A20, A30, A40, A50, A60 and A70. They correspond to the measurement of the NRM and of steps in which fields of 10, 20, 30, 40, 50, 60 and 70 mT where respectively applied. Files M0 (.txt and .jr6) include only NRM measurements, files M1 include measurements of specimens heated with an applied field parallel to their NRM, files M2 include measurements of specimens heated with an applied field antiparallel to their NRM, files M3 include measurements of specimens heated in zero field and cooled down in an applied field parallel to their NRM, and files M4 include again include measurements of specimens heated with an applied field parallel to their NRM.</p> <p><strong>REFERENCES</strong></p> <p>Biggin, A., Poidras, T., 2006. First-order symmetry of weak-field partial thermoremanence in multi-domain ferromagnetic grains. 1. Experimental evidence and physical implications. Earth Planet. Sci. Lett. 245, 438–453. doi:10.1016/j.epsl.2006.02.035</p> <p>Chadima, M. and Hrouda, F., 2006. Remasoft 3.0 a user friendly paleomagnetic data browser and analyzer. <em>Travaux Géophysiques</em>, XXVII, 20-21.</p> <p>Dekkers, M.J., Böhnel, H.N., 2006. Reliable absolute palaeointensities independent of magnetic domain state. Earth Planet. Sci. Lett. 248, 507–516. doi:10.1016/j.epsl.2006.05.040</p> <p>Fabian, K., Leonhardt, R., 2010. Multiple-specimen absolute paleointensity determination: An optimal protocol including pTRM normalization, domain-state correction, and alteration test. Earth Planet. Sci. Lett. 297, 84–94. doi:10.1016/j.epsl.2010.06.006</p> <p>Leonhardt, R., 2006. Analyzing rock magnetic measurements; The RockMagAnalyzer 1.0 software.<em>Computers and Geosciences</em>, 32, 1420-1431.</p> <p>Leonhardt, R., Heunemann, C. and Krása, D., 2004. Analyzing absolute paleointensity determinations: Acceptance criteria and the software ThellierTool4.0. <em>Geochem. Geophys. Geosyst.</em>, Vol. 5, no. 12, doi.: 10.1029/2004GC000807.</p> <p>Monster, M.W.L., de Groot, L. V., Dekkers, M.J., 2015. MSP-Tool: A VBA-Based Software Tool for the Analysis of Multispecimen Paleointensity Data. Front. Earth Sci. 3, 1–9. https://doi.org/10.3389/feart.2015.00086</p>
NE Caribbean paleomagnetic dataset
<p>The data are used for the paleomagnetic analysis presented in the paper : "Paleomagnetic rotations in the North-eastern Caribbean region reveal major intraplate deformation since the Eocene" published in Tectonics in 2023. </p>
Radiocarbon, Tephra, and Paleomagnetic Data from 5 Northern North Atlantic Sediment Cores to support Reilly et al. 2023, "The Amplitude and Timescales of 0-15 ka Paleomagnetic Secular Variation in the Northern North Atlantic."
<p>Data in support of Reilly et al., 2023, "The Amplitude and Timescales of 0-15 ka Paleomagnetic Secular Variation in the Northern North Atlantic." Published in the Journal of Geophysical Research: Solid Earth.</p> <p> </p> <p>Excel file includes worksheets for the following data:</p> <p>Tabular versions of the Supplementary Data Tables from the associated publication:</p> <ul> <li>Supplementary Table S1 from Publication: 14C data from sediment cores used in study</li> <li>Supplementary Table S2 from Publication: 14C data used in the GREENICE15 Stack</li> <li>Supplementary Table S3 from Publication: Tephra data used in study</li> </ul> <p>Paleomagnetic Datasets for the Characteristic Remanent Magnetizations used in this study:</p> <ul> <li>Paleomagnetic Data for Core MD99-2264</li> <li>Paleomagnetic Data for Core MD99-2265</li> <li>Paleomagnetic Data for Core MD99-2266</li> <li>Paleomagnetic Data for Core MD99-2269</li> <li>Paleomagnetic Data for Core MD99-2322</li> </ul> <p>Independent radiocarbon based Age Models for 5 cores used in this study:</p> <ul> <li>Independent Age Model for Core MD99-2264</li> <li>Independent Age Model for Core MD99-2265</li> <li>Independent Age Model for Core MD99-2266</li> <li>Independent Age Model for Core MD99-2269</li> <li>Independent Age Model for Core MD99-2322</li> </ul> <p>PSV Dynamic Time Warping (DTW) solutions of 3 cores to target curve, as described in publication</p> <ul> <li>DTW solution for MD99-2265 to target curve</li> <li>DTW solution for MD99-2266 to target curve</li> <li>DTW solution for MD99-2322 to target curve</li> </ul> <p>GREENICE15 PSV Stack</p> <ul> <li>Age model for GREENICE15 Stack using combined radiocarbon dates and correlated equivalent depth scale</li> <li>Inclination, Declination, and alpha 95 for the GREENICE15 PSV Stack</li> </ul>
Paleomagnetic constraint on the Age of the Shyok Suture Zone
<p class="Text">The India-Eurasia collision is a key case study for understanding the influence of plate tectonic processes on Earth's crust, atmosphere, hydrosphere and biosphere. However, the timing of the final India-Eurasia continental collision is debated due to significant uncertainty in the age of the collision between the Kohistan-Ladakh arc and Eurasia along the Shyok suture zone. Here we present paleomagnetic results that constrain the Karakoram terrane in northwest India to a paleolatitude of 19.9 ± 8.9 °N between 93 – 75 million years ago (Ma). Our results show that the Karakoram terrane was situated on the southern margin of Eurasia in the Late Cretaceous. Our results indicate that the Kohistan-Ladakh arc and Eurasian continent had not converged until < 61.6 Ma, placing a Paleocene older limit on the age of final closure of the Shyok suture zone. This suggests that the India-Eurasia collision in northwestern India likely occurred after the closure of the oceanic basin between the Kohistan-Ladakh arc and Eurasia. The Paleocene collision event affecting India that has been widely interpreted to represent the final India-Eurasia collision instead records the arc-continent collision between the Kohistan-Ladakh arc and the northern edge of India prior to the final India-Eurasia collision. The final India-Eurasia collision in northwest India most likely occurred after the closure of the oceanic basin between the Kohistan-Ladakh arc and Eurasia.</p>
Paleomagnetic constraint on the Age of the Shyok Suture Zone
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Supporting data for: "Heritage of Tethyan oceanic transform faults within Alpine orogens: Paleomagnetic evidence from the Shkoder-Peja transverse zone (Northern Albania)"
<p>Paleomagnetic data from the Shkoder-Peja transverse zone, collected in the Krasta-Cukali and Albanian Alps tectonic units (Northern Albania).</p> <p>To open and navigate with Remasoft software (https://www.agico.com/text/software/remasoft/remasoft.php).</p>
Testing paleomagnetic dating accuracy on pre-historic flank eruptions from SE slope of Etna volcano
<p>Paleomagnetic and petrographic data used for supporting the work of Magli et al. (Testing paleomagnetic dating accuracy on pre-historic flank eruptions from SE slope of Etna volcano):</p><ul><li>"AF_Demag.xlsx" = Alternating Field (AF) demagnetization data obtained at the Laboratory of Paleomagnetism (INGV of Rome) for each demagnetization step (20 up to 120 mT) for all samples.</li><li>"Bulk_susceptibility_&_Q.xlsx" = NRM (Natural Remanent Magnetization), k (susceptibility), J (induced magnetization intensity) and Q (Königsberger ratio, NRM/J) values obtained for each sample.</li><li>"ImageJ_analyses.xlsx" = abundance values (volume %) of vesicles and mineralogical phases obtained by ImageJ software (along with phenocrysts dimensions) for each random photo, for each sampling site and for each lava flow studied.</li><li>"Therm_curve.xlsx" = Susceptibility and temperature values obtained thorugh the MFK1 Kappabridge to provide thermomagnetic curves.</li></ul>
Paleomagnetic and Rock Magnetic Data for Chicxulub Upper Peak Ring IODP-ICDP Expedition 364
<p>This repository contains paleomagnetic and rock magnetic data collected from the Chicxulub Crater upper peak ring from the Rutgers and CEREGE Paleomagnetism Laboratories. </p> <p>Subsets of this dataset were presented in:</p> <p>1. Gulick et al. (2019) </p> <p>2. Kring et al. (2020) Probing the hydrothermal system of the Chicxulub Crater</p> <p>The entire dataset is considered in:</p> <p>1. Verhagen et al. (2025, submitted).</p>
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