Journal: Earth and Planetary Science Letters

Abbreviation

Earth Planet. Sci. Lett.

Publisher

Elsevier

Journal Volumes

ISSN

0012-821X
1385-013X

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Publications 1 - 10 of 600
  • Evidence for hydrothermal venting in Fe isotope compositions of the deep Pacific Ocean through time
    Item type: Journal Article
    Chu, N.-C.; Johnson, C.M.; Beard, B.L.; et al. (2006)
    Earth and Planetary Science Letters
  • The geophysical signature of a continental intraplate volcanic system: From surface to mantle source
    Item type: Journal Article
    Comeau, Matthew J.; Becken, Michael; Grayver, Alexander; et al. (2022)
    Earth and Planetary Science Letters
    The structure of continental intraplate volcanic systems — which occur far from tectonic boundaries, unlike the majority of Earth's volcanism — is enigmatic and not fully understood, as are the underlying mechanisms responsible, due in part to a lack of high-resolution geophysical data. Central Mongolia contains Quaternary–Neogene aged alkaline basalt flows and volcanic cones, thousands of kilometres from active tectonic margins, in addition to an abundance of geochemical and petrological data — making this a natural laboratory to study intraplate volcanism. Using a recently collected, high-resolution, multi-scale, magnetotelluric dataset acquired across central Mongolia, we generate and analyze electrical resistivity models of the structure beneath the Tariat and Chuluut volcanic zones with the goal of imaging the volcanic system from surface to mantle source. The models reveal narrow, subvertical, lower resistivity anomalies in the middle-upper crust that are conspicuously located beneath surface expressions of volcanism. The lower crust (depths of 25–50 km) is characterized by the widespread distribution of isolated low-resistivity zones. A local low-resistivity zone is imaged in the mantle (depths of 60–90 km) above a broad, homogenous, doming low-resistivity feature. Considering the available evidence, we propose that the low-resistivity anomalies in the middle-upper crust are the remnant signatures of past transient magma pathways (or collection of pathways), caused by metasomatic alteration during the ascent of hot magmatic fluids. The lower crustal anomalies are interpreted to be domains of saline fluids in a thermally perturbed lower crust. In the mantle, the low-resistivity structure is explained by a broad mantle upwelling and thermal anomaly with a local zone of low-percent partial melt — the source for intraplate volcanism. The geophysical images are consistent with geochemical and petrological evidence from erupted lavas that indicates a single common mantle source region, limited crustal contamination, and rapid direct ascent, making crustal magma storage unlikely. Thus the geophysical models show remarkable and unique translithospheric images of a continental intraplate volcanic system, from surface to mantle source, with the results relevant to other continental regions.
  • The transport of carbon and hydrogen in subducted oceanic crust
    Item type: Journal Article
    Poli, Stefano; Franzolin, Ettore; Fumagalli, Patrizia; et al. (2009)
    Earth and Planetary Science Letters
  • Changes in erosion and ocean circulation recorded in the Hf isotopic compositions of North Atlantic and Indian Ocean ferromanganese crusts
    Item type: Journal Article
    Piotrowski, Alexander M.; Lee, Der-Chuen; Christensen, John N.; et al. (2000)
    Earth and Planetary Science Letters
  • Altered carbon cycling and coupled changes in Early Cretaceous weathering patterns
    Item type: Journal Article
    Wortmann, Ulrich Georg; Herrle, Jens Olaf; Weissert, Helmut (2004)
    Earth and Planetary Science Letters
  • The Blake geomagnetic excursion recorded in a radiometrically dated speleothem
    Item type: Journal Article
    Osete, María-Luisa; Martin-Chivelet, Javier; Rossi, Carlos; et al. (2012)
    Earth and Planetary Science Letters
  • Nickel isotopes in iron meteorites–nucleosynthetic anomalies in sulphides with no effects in metals and no trace of 60Fe
    Item type: Journal Article
    Quitté, Ghylaine; Meier, Matthias; Latkoczy, Christopher; et al. (2006)
    Earth and Planetary Science Letters
  • Identification of the static backstop and its influence on the evolution of the accretionary prism in the Nankai Trough
    Item type: Journal Article
    Tsuji, Takeshi; Ashi, Juichiro; Strasser, Michael; et al. (2015)
    Earth and Planetary Science Letters
    To reveal the origin of a backstop and its influence on the evolution of the accretionary prism, we analyzed reflection seismic data acquired in the Nankai Trough off the Kii Peninsula. The deformation features of the forearc basin sequence show that the landward accretionary prism close to the coast was not deformed after the development of the forearc basin about 2–4 Ma. The surface of the landward prism can be identified as strong amplitude reflector, indicating that the landward prism has higher seismic velocity. Therefore, the landward accretionary prism inferred to be of higher strength constitutes a static backstop. Based on seismic and geologic observations, we interpret that the backstop was generated due to the large age differences of accreted material resulting from an inferred hiatus in subduction between ∼13 and 6 Ma. The time-dependent processes such as the igneous activity in middle Miocene further contribute to the development of the backstop. A ridge structure beneath the forearc basin located trenchward of this backstop and running roughly parallel to it appears to reflect activity on an ancient splay fault. The strike of the ancient splay fault runs parallel to the backstop identified in this study and oblique to the current trench. This geometry suggests that location and mechanical behavior of this splay fault system is influenced by the backstop, and its distribution could be related to the coseismic rupture area.
  • Origin and Cretaceous tectonic history of the coastal Ecuadorian forearc between 1°N and 3°S
    Item type: Journal Article
    Luzieux, L.D.A.; Heller, F.; Spikings, R.; et al. (2006)
    Earth and Planetary Science Letters
  • The initial abundance and distribution of 92Nb in the Solar System
    Item type: Journal Article
    Iizuka, Tsuyoshi; Lai, Yi-Jen; Akram, Waheed; et al. (2016)
    Earth and Planetary Science Letters
Publications 1 - 10 of 600