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  1. Book ; Article ; Online: ASPECT models of a mantle plume under West Antarctica

    Steinberger, B.

    2023  

    Abstract: In order to test the feasibility of density and viscosity models suitable to explain geoid and dynamic topography in West Antarctica, we perform computations of a thermal plume that enters at the base of a cartesian box corresponding to a region in the ... ...

    Abstract In order to test the feasibility of density and viscosity models suitable to explain geoid and dynamic topography in West Antarctica, we perform computations of a thermal plume that enters at the base of a cartesian box corresponding to a region in the upper mantle, as well as some whole-mantle thermal plume models, as well as some instantaneous disk models, with ASPECT. The plume models have typically a narrow conduit and the plume tends to only become wider as it spreads beneath the lithosphere, typically shallower than ~300 km. These results are most consistent with a shallow disk model with reduced uppermost mantle viscosity, hence providing further support for such low viscosities beneath West Antarctica. The data are a supplement to the following article: Steinberger, B., Grasnick, M.-L. & Ludwig, R., Exploring the Origin of Geoid Low and Topography High in West Antarctica: Insights from Density Anomalies and Mantle Convection Models, Tektonika, https://doi.org/10.55575/tektonika2023.1.2.35
    Subject code 550
    Language English
    Publisher GFZ Data Services
    Publishing country de
    Document type Book ; Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Mantle plumes and their interactions

    Steinberger, B. / Steinberger, A.

    Dynamics of Plate Tectonics and Mantle Convection

    2023  

    Abstract: Hotspots are regions of intraplate volcanism or especially strong volcanism along plate boundaries, and many of them are likely caused by underlying mantle plumes – localized hot upwellings from deep inside the Earth. It is still uncertain, whether all ... ...

    Abstract Hotspots are regions of intraplate volcanism or especially strong volcanism along plate boundaries, and many of them are likely caused by underlying mantle plumes – localized hot upwellings from deep inside the Earth. It is still uncertain, whether all plumes or just some of them rise from the lowermost mantle, and to what extent and where they entrain chemically different materials. Also, large uncertainties exist regarding their size. Some plumes (such as Hawaii) create linear hotspot tracks, as the plate moves over them and can therefore serve as reference frames for plate motions, whereas others (such as Iceland) show a more complicated distribution of volcanic rocks due to variable lithosphere thickness and plume-ridge interaction. Plumes may also weaken plate boundaries and hence influence plate motions. They may influence surface features such as ice sheets, and therefore climate, but we are just beginning to study and understand processes jointly involving solid earth, hydrosphere and atmosphere.
    Subject code 550
    Language English
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Conference proceedings ; Online: Modelling of seismic anisotropy with rheologically constrained geodynamic setup

    Roy, P. / Steinberger, B.

    XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)

    2023  

    Abstract: Seismic anisotropy is an observation that is believed to yield information on the flow pattern in the mantle. There are many studies of anisotropy in the upper mantle; however, the lower mantle is still underexplored, due to problems in seismic imaging ... ...

    Abstract Seismic anisotropy is an observation that is believed to yield information on the flow pattern in the mantle. There are many studies of anisotropy in the upper mantle; however, the lower mantle is still underexplored, due to problems in seismic imaging and complexities of modelling of flow laws of different minerals. In this study, we modelled the radially anisotropic behavior of two different geodynamic setups, one is the rising of a mantle plume from the core-mantle boundary to the surface, and another is subduction of a slab reaching the lowermost mantle. We use ASPECT for modelling large scale mantle flow and ECOMAN to simulate the development of lattice preferred orientation of mantle fabric. We then couple the results from ASPECT to ECOMAN for modelling the radial anisotropy and maximum shear wave splitting direction. We show that in the part of the lowermost mantle surrounding the plume horizontally polarized shear waves (Vsh ) are faster than the vertically polarized ones (Vsv ) while the inside of the plume tail shows opposite signature. However, Vsh becomes greater than Vsv when the plume flattens out at the surface. We also find that the maximum splitting direction is horizontal outside the base of the plume and it becomes vertical inside the plume tail and again becomes horizontal at the surface. Moreover, our result for the slab setup reveals that as the slab reaches the lowermost mantle, Vsh becomes higher than Vsv and maximum splitting is horizontal at the base of the slab.
    Subject code 550
    Language English
    Publishing date 2023-07-11
    Publishing country de
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book ; Article ; Online: Yellowstone hotspot motion and plume conduits

    Steinberger, B.

    2019  

    Language English
    Publisher GFZ Data Services
    Publishing country de
    Document type Book ; Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  5. Article ; Online: Impact of mantle convection and dynamic topography on the Cenozoic paleogeography of Central Eurasia and the West Siberian Seaway

    Straume, E. / Steinberger, B. / Becker, T. / Faccenna, C.

    Earth and Planetary Science Letters

    2024  

    Abstract: The West Siberian Seaway connected the Tethys to the Arctic Ocean in the Paleogene and played an important role for Eurasian-Arctic biogeography, ocean circulation, and climate. However, the paleogeography and geological mechanisms enabling the seaway ... ...

    Abstract The West Siberian Seaway connected the Tethys to the Arctic Ocean in the Paleogene and played an important role for Eurasian-Arctic biogeography, ocean circulation, and climate. However, the paleogeography and geological mechanisms enabling the seaway are not well constrained, which complicates linking the seaway evolution to paleoenvironmental changes. Here, we investigate the paleogeography of the Peri-Tethys realms for the Cenozoic time (66–0 Ma), including the West Siberian Seaway, and quantify the influence of mantle convection and corresponding dynamic topography. We start by generating continuous digital elevation models for Eurasia, Arabia, and Northern Africa, by digitizing regional paleogeographic maps and additional geological information and incorporate them in a global paleogeography model with nominal million-year resolution. Then we compute time-dependent dynamic topography for the same time interval and find a clear correlation between changes in dynamic topography and the paleogeographic evolution of Central Eurasia and the West Siberian Seaway. Our results suggest that mantle convection played a greater role in Eurasian paleogeography than previously recognized. Mantle flow may have influenced oceanic connections between the Arctic and global ocean providing a link between deep mantle convection, surface evolution, and environmental changes. Our reconstructions also indicate that the Arctic Ocean may have been isolated from the global ocean in the Eocene, even if the West Siberian Seaway was open, as the Peri-Tethys – Tethys connection was limited, and the Greenland-Scotland Ridge was a landbridge.
    Subject code 551
    Language English
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  6. Article ; Online: Understanding the geodynamics of the largest geoid low in the Indian Ocean

    Pandey, D. / Tiwari, V. / Steinberger, B.

    Tectonophysics

    2023  

    Abstract: The geoid is an equipotential surface that broadly mimics the mean sea level. The difference between the geoid and the reference spheroid at any location is referred to as a geoid anomaly. The geoid ‘highs’ (positive) or ‘lows’ (negative) are primarily ... ...

    Abstract The geoid is an equipotential surface that broadly mimics the mean sea level. The difference between the geoid and the reference spheroid at any location is referred to as a geoid anomaly. The geoid ‘highs’ (positive) or ‘lows’ (negative) are primarily associated with mass anomalies, thereby could offer important information about compositional and thermal properties in the Earth's interior. The maximum geoidal surplus (+85 m) is observed to the east of New Guinea whereas the largest deficit (−106 m) is observed in the Indian Ocean south of Sri Lanka – commonly known as the Indian Ocean geoid low (IOGL). On a global geoid map, the IOGL anomaly covers an extensive circular area spanning >2000 km in diameter (Fig. 1). Several different hypotheses have been put forth to explain this enigmatic anomaly. These include effects of isostatically uncompensated crust (Ihnen and Whitcomb, 1983), depression in the core-mantle boundary (Negi et al., 1987), slab graveyards in the mantle (Spasojevic et al., 2010), anomalous variations in the mantle transition zone (Reiss et al., 2017; Rao et al., 2020) and presence of a very low-velocity material arising from the African large low shear velocity province (LLSVP) or simply known as the African superplume (Ghosh et al., 2017). Most of these hypotheses rely upon either very sparse seismological observations, numerical modelling or remote sensing data. Global seismic tomographic models provide first-order information about the Earth's interior (Simmons et al., 2010, Simmons et al., 2012, Simmons et al., 2015). However, the uneven distribution of seismological networks has stymied production of high-resolution sub-surface images. In search of concrete causative mechanisms behind the IOGL anomaly, deep seismological observations from the Indian Ocean have been awaited for a long time. Between 2015 and 2020, the Ministry of Earth Sciences (MoES) India deployed a focused linear broadband passive seismological array comprising 17 ocean bottom seismometers (OBS) for two successive ...
    Subject code 550
    Language English
    Publishing country de
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article: Psychoanalytische Einblicke in einen Transitionsprozess

    Steinberger, Bettina

    Zeitschrift für Sexualforschung

    2020  Volume 33, Issue 03, Page(s) 159–163

    Abstract: Die vorliegende Fallstudie beschreibt die psychoanalytische Behandlung einer Patientin, die als Mann mit schweren Depressionen, sexuellen Funktionsstörungen und einem Sich-hingezogen-Fühlen zu transidenten Menschen Hilfe suchte. Im Laufe der Behandlung ... ...

    Abstract Die vorliegende Fallstudie beschreibt die psychoanalytische Behandlung einer Patientin, die als Mann mit schweren Depressionen, sexuellen Funktionsstörungen und einem Sich-hingezogen-Fühlen zu transidenten Menschen Hilfe suchte. Im Laufe der Behandlung wagte sich die Patientin in ihren Transitionsprozess. Der regressive Prozess sowie Probehandlungen in einer neuen weiblichen Geschlechterrolle förderten den allmählichen Zugang zu inneren Objektwelten, führten zu abnehmendem Hass auf die männlichen Genitalien und einer intensiven Auseinandersetzung mit Kastrationsängsten und -wünschen. In den Symptomen von Erektionsstörung und Ejaculatio praecox fanden sich eine enge Verschränkung präödipaler und ödipaler Ängste und Fantasien, der die Patientin zunächst durch die genitalangleichende Operationen auszuweichen gehofft hatte. Durch die Veränderung ihres Verständnisses im Geschlechtserleben entwickelten sich zeitweilig ein manisches Hochgefühl, männlich wie weiblich sein zu können und zu wollen, aber auch Identitätsverwirrung und Haltlosigkeit. Das analytische Setting konnte die Gefühlsschwankungen auffangen, sodass die Patientin zum Ende der Therapie ein In-Between aushalten und den männlichen Anteil in sich integrieren konnte.
    Keywords Bisexualität ; Geschlechtsdysphorie ; Transgender ; Transidentität ; Transsexualität ; bisexuality ; gender dysphoria ; transgender ; trans identity ; transsexualism
    Language German
    Publishing date 2020-09-01
    Publisher © Georg Thieme Verlag KG
    Publishing place Stuttgart ; New York
    Document type Article
    ZDB-ID 645008-8
    ISSN 1438-9460 ; 0932-8114
    ISSN (online) 1438-9460
    ISSN 0932-8114
    DOI 10.1055/a-1218-7604
    Database Thieme publisher's database

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  8. Article: Psychoanalytische Einblicke in einen Transitionsprozess

    Steinberger, Bettina

    Zeitschrift für Sexualforschung

    2020  Volume 33, Issue 3, Page(s) 159–163

    Abstract: Die vorliegende Fallstudie beschreibt die psychoanalytische Behandlung einer Patientin, die als Mann mit schweren Depressionen, sexuellen Funktionsstörungen und einem Sich-hingezogen-Fühlen zu transidenten Menschen Hilfe suchte. Im Laufe der Behandlung ... ...

    Title translation Psychoanalytical insights into a transition process
    Abstract Die vorliegende Fallstudie beschreibt die psychoanalytische Behandlung einer Patientin, die als Mann mit schweren Depressionen, sexuellen Funktionsstörungen und einem Sich-hingezogen-Fühlen zu transidenten Menschen Hilfe suchte. Im Laufe der Behandlung wagte sich die Patientin in ihren Transitionsprozess. Der regressive Prozess sowie Probehandlungen in einer neuen weiblichen Geschlechterrolle förderten den allmählichen Zugang zu inneren Objektwelten, führten zu abnehmendem Hass auf die männlichen Genitalien und einer intensiven Auseinandersetzung mit Kastrationsängsten und -wünschen. In den Symptomen von Erektionsstörung und Ejaculatio praecox fanden sich eine enge Verschränkung präödipaler und ödipaler Ängste und Fantasien, der die Patientin zunächst durch die genitalangleichende Operationen auszuweichen gehofft hatte. Durch die Veränderung ihres Verständnisses im Geschlechtserleben entwickelten sich zeitweilig ein manisches Hochgefühl, männlich wie weiblich sein zu können und zu wollen, aber auch Identitätsverwirrung und Haltlosigkeit. Das analytische Setting konnte die Gefühlsschwankungen auffangen, sodass die Patientin zum Ende der Therapie ein In-Between aushalten und den männlichen Anteil in sich integrieren konnte. (c) Thieme. All rights reserved.
    Keywords Castration Anxiety ; Erectile Dysfunction ; Erektile Dysfunktion ; Gender Dysphoria ; Gender Identity ; Gender Reassignment ; Geschlechtsdysphorie ; Geschlechtsidentität ; Geschlechtsumwandlung ; Kastrationsangst ; Object Relations ; Objektbeziehungen ; Psychoanalysis ; Psychoanalytische Therapie ; Transsexualism ; Transsexualität
    Language German
    Document type Article
    ZDB-ID 645008-8
    ISSN 1438-9460 ; 0932-8114
    ISSN (online) 1438-9460
    ISSN 0932-8114
    DOI 10.1055/a-1218-7604
    Database PSYNDEX

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 2403: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  9. Conference proceedings ; Online: Major influence of lithosphere thickness variations and global mantle flow on Tristan hotspot volcanism - part 1

    Steinberger, B.

    Scientific Program

    plume head and its interaction with continental rifting

    2016  

    Publishing country de
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  10. Article ; Online: Topography caused by mantle density variations

    Steinberger, B.

    Geophysical Journal International

    observation-based estimates and models derived from tomography and lithosphere thickness

    2016  

    Publishing country de
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