POSTGLACIAL INDUCED SURFACE MOTION AND GRAVITY IN LAURENTIA FOR UNIFORM MANTLE WITH POWER-LAW RHEOLOGY AND AMBIENT TECTONIC STRESS
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dc.contributor.author | Wu P. | |
dc.date.accessioned | 2021-02-12T03:03:01Z | |
dc.date.available | 2021-02-12T03:03:01Z | |
dc.date.issued | 2001 | |
dc.identifier | https://www.elibrary.ru/item.asp?id=586016 | |
dc.identifier.citation | Earth and Planetary Science Letters, 2001, 186, 3-4, 427-435 | |
dc.identifier.issn | 0012-821X | |
dc.identifier.uri | https://repository.geologyscience.ru/handle/123456789/24688 | |
dc.description.abstract | Previous investigations of postglacial sea levels around Laurentia in a non-linear earth without ambient stress found that non-linear uniform mantle models cannot explain the relative sea level data around the ice margin. In this study, a 3D finite element model of postglacial readjustment is used to calculate the Earth's response due to realistic ice and eustatic water loads on stratified mantle with non-linear rheology and ambient tectonic shear stress. By varying the creep parameter A* and the ambient stress level in a uniform mantle, it is found that the combination A* around 3x10-35 Pa-3 s-1 and ambient stress level around 10 MPa is able to explain the sea level data both outside and inside the Laurentian ice margin - although for certain sites inside, a slightly thicker ice is required to improve the fit to the data. Other geophysical and geodetic observables - namely uplift rate, horizontal velocity, free air gravity and the rate of change of gravity - have also been calculated for this model. | |
dc.subject | HOLOCENE | |
dc.subject | SEA-LEVEL CHANGES | |
dc.subject | UPLIFT RATE | |
dc.subject | HORIZONTAL VELOCITY | |
dc.subject | GRAVITY | |
dc.subject | LAURENTIA | |
dc.subject | RHEOLOGY | |
dc.subject | TECTONICS | |
dc.subject | STRESS | |
dc.title | POSTGLACIAL INDUCED SURFACE MOTION AND GRAVITY IN LAURENTIA FOR UNIFORM MANTLE WITH POWER-LAW RHEOLOGY AND AMBIENT TECTONIC STRESS | |
dc.type | Статья | |
dc.subject.age | Cenozoic::Quaternary::Holocene | en |
dc.subject.age | Кайнозой::Четвертичная::Голоцен | ru |
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