Journal: Journal of Geodynamics

Abbreviation

J. Geodyn.

Publisher

Elsevier

Journal Volumes

ISSN

0264-3707
1879-1670

Description

Filters

Reset filters

Search Results

Publications 1 - 10 of 11
  • Advances in Southern Ocean tide modeling
    Item type: Conference Paper
    Yi, Yuchan; Matsumoto, Koji; Shum, C.K.; et al. (2006)
    Journal of Geodynamics
  • Overview of adaptive finite element analysis in computational geodynamics
    Item type: Journal Article
    May, D. A.; Schellart, W. P.; Moresi, L. (2013)
    Journal of Geodynamics
  • On the influence of the asthenospheric flow on the tectonics and topography at a collision-subduction transition zones: Comparison with the eastern Tibetan margin
    Item type: Journal Article
    Sternai, Pietro; Avouac, Jean-Philippe; Jolivet, Laurent; et al. (2016)
    Journal of Geodynamics
  • Late Carboniferous-Early Permian geodynamic evolution of NW Iran: Zircon U-Pb ages, Hf isotopes, and whole rock geochemistry of Salmas amphibolites
    Item type: Journal Article
    Hajialioghli, Robab; Moazzen, Mohssen; Saeidi, Sorraya; et al. (2025)
    Journal of Geodynamics
    We present new geochronological, petrological, and geochemical data from the amphibolites of the Salmas metamorphic complex in NW Iran. This region is where the Sanandaj-Sirjan magmatic-metamorphic zone, the Urmia-Dokhtar magmatic arc, and the Eastern Anatolian Plateau converge, creating a complex geodynamic context. The amphibolites alternate with gneisses and metamorphosed limestone layers and appear as enclaves of varying sizes within the gneisses. Fine- to medium-grained amphibole and plagioclase, exhibiting a granoblastic texture, are the dominant minerals, indicating basaltic and diabasic protoliths. The amphiboles show simple foliation along lineation, which is occasionally folded. These amphibolites are overlain by Permian to Jurassic sedimentary rocks and, in some places, by Miocene sediments with angular unconformity. Based on whole-rock geochemistry, the amphibolites have relatively high TiO2 (1.23–2.62 wt%) and low MnO (0.18–0.21 wt%) contents, classifying them as ortho-amphibolites. The parental magma was sub-alkaline basaltic with tholeiitic affinities, formed in a within-plate tectonic setting. This is characterized by enrichment in LREE relative to HREE, a lack of Nb, Ta, and Ti anomalies, and the presence of negative Eu and positive Ba anomalies. The ɛHf(t) and 176Hf/177Hf ratios of dated zircons suggest a depleted mantle to lower crust origin for the parental magma of the amphibolites. U-Pb dating of zircon grains yields a mean age of 304.8 Ma, corresponding to Late Carboniferous-Early Permian magmatism related to the opening of the Neotethys Ocean. The thermal effects of Late Cretaceous to Early Cenozoic subduction-related magmatic events are recorded by overgrown metamorphic zircon around original magmatic grains.
  • A long-term rock uplift rate for eastern Crete and geodynamic implications for the Hellenic subduction zone
    Item type: Journal Article
    Strobl, Marcus; Hetzel, Ralf; Fassoulas, Charalampos; et al. (2014)
    Journal of Geodynamics
  • Analysis of central western Europe deformation using GPS and seismic data
    Item type: Journal Article
    Tesauro, Magdala; Hollenstein, Christine; Egli, Ramon; et al. (2006)
    Journal of Geodynamics
  • A North Pole thermal anomaly? Evidence from new and existing heat flow measurements from the central Arctic Ocean
    Item type: Journal Article
    Shephard G.; Wiers, Steffen; Bazhenova, Evgenia; et al. (2018)
    Journal of Geodynamics
    Constraining the thermal evolution of the Arctic Ocean is hampered by notably sparse heat flow measurements and a complex tectonic history. Previous results from the Lomonosov Ridge in the vicinity of the North Pole, and the adjacent central Amundsen Basin reveal varied values, including those higher than expected considering plate cooling or simple uniform stretching models. Furthermore, in the vicinity of the North Pole an anomalously slow velocity perturbation exists in upper mantle seismic tomography models. However, whether these observations are related to a thermal anomaly in the mantle remains unknown. We present new heat flow results gathered from 17 sediment cores acquired during the “Arctic Ocean 2016” and “SWERUS-C3” expeditions on the Swedish icebreaker Oden. Three sites located on oceanic lithosphere in the Amundsen Basin between 7°W-71E° reveal surface thermal conductivity of 1.07–1.26 W/mK and heat flow in the order of 71–95 mW/m2, in line-with or slightly higher (1–21 mW/m2) than expected from oceanic heat flow curves. These results contrast with published results from further east in the Amundsen Basin, which indicated surface heat flow values up to 2 times higher than predicted from oceanic crustal cooling models. Heat flow of 49–61 mW/m2 was recovered from the Amerasia Basin. Sites from the submerged continental fragments of the Lomonosov Ridge and Marvin Spur recovered heat flow in the order of 53–76 and 51–69 mW/m2 respectively. When considering the additional potential surface heat flux from radiogenic heat production in the crust, these variable measurements are broadly in line with predictions from uniform extension models for continental crust. A seismically imaged upper mantle velocity anomaly in the central Arctic Ocean may arise from a combination of compositional and thermal variations but requires additional investigation. Disentangling surface heat flow contributions from crustal, lithospheric and mantle processes, including variable along-ridge rifting rates and timing, density and phase changes, conductive and advective dynamics, and regional tectonics, requires further analysis.
  • Future directions in subduction modeling
    Item type: Review Article
    Gerya, Taras (2011)
    Journal of Geodynamics
  • Early Earth plume-lid tectonics: A high-resolution 3D numerical modelling approach
    Item type: Journal Article
    Fischer, Ria; Gerya, Taras (2016)
    Journal of Geodynamics
  • Late Paleozoic-Jurassic tectonic evolution of the eastern Deseado Massif in central-southern Patagonia
    Item type: Journal Article
    Navarrete, César; Bastías-Silva, Joaquín; Gianni, Guido; et al. (2023)
    Journal of Geodynamics
    Previous tectonic studies have indicated that the peri-cratonic lithosphere, located away from continental margins, is sensitive to far-field stresses propagating from active plate margins, which induce variable deformation. In order to gain a better understanding of potential intraplate tectonic events associated with the geodynamic evolution of the active margin of southwestern Gondwana, we conducted a tectono-sedimentary study of the Permian-Jurassic volcano-sedimentary record in the Deseado Massif, located in southern Patagonia. Our multidisciplinary analysis includes detailed geological mapping of an area of approximately 150 km2, structural analysis, geoelectric tomography, 2D seismic data, new geochronological dating, petrographic studies, and stratigraphic loggings of the volcano-sedimentary basin record. This comprehensive data set has allowed us to establish the tectonic, sedimentary, and magmatic evolution of the eastern Deseado Massif. Specifically, we have identified major normal faults associated with the syn-extensional deposition of late Permian and Jurassic sedimentary and volcanic rocks, as well as the Late Triassic emplacement of intermediate and felsic intrusive bodies. Additionally, interspersed large-scale shortening events were recognized, which induced positive tectonic inversion events in the region, recording contrasting stress fields during the analyzed lapse. Based on this, six major intraplate tectonomagmatic events were defined: (i) a potential post-Devonian pre-late Permian exhumation of the Neoproterozoic-early Paleozoic igneous-metamorphic basement, which we tentatively link to the Gondwanide orogeny; (ii) intraplate extension in the Late Permian (255 ± 4 Ma) related to the deposition of the Dos Hermanos Member of the La Golondrina Formation; (iii) Late Triassic (231 ± 3 Ma) intrusion of andesitic bodies, tentatively linked to the inland migration of arc magmatism associated with the South Gondwana flat slab; (iv) subsequent Late Triassic positive tectonic inversion of Permian extensional faults caused by a large-scale contractional event linked to the South Gondwana flat slab; (v) the extension-related emplacement and deposition of Early-Middle Jurassic (176 ± 3 Ma; 172 ± 4 Ma) sedimentary (lacustrine and fan deltas-related deposits), pyroclastic rocks (ignimbrites and ash tuffs), and lavas (lava domes and dykes) related to the Chon Aike silicic large igneous province; and (vi) poorly-constrained post-Middle Jurassic positive tectonic inversion of Jurassic faults. Therefore, we suggest that the geological events preserved in the Deseado Massif provide a key deformational record of the distal effects associated with ancient geodynamic processes that occurred along the southwestern active margin of Gondwana.
Publications 1 - 10 of 11