Network


Latest external collaboration on country level. Dive into details by clicking on the dots.

Hotspot


Dive into the research topics where Amit Segev is active.

Publication


Featured researches published by Amit Segev.


Journal of the Geological Society | 2010

Effects of Cretaceous plume and convergence, and Early Tertiary tectonomagmatic quiescence on the central and southern Levant continental margin

Amit Segev; Michael Rybakov

Abstract: This study synthesizes geological and geophysical evidence concerning the structure and character of the central and southern Jurassic Levant continental margin during Cretaceous–Tertiary time. From the beginning of the Cretaceous and until Cenomanian time, the Levant margin was strongly affected by extensional tectonics, cyclical igneous activity and rifting coupled with thermal and vertical fluctuations. It is suggested here that during the Senonian–Maastrichtian convergence of Afro-Arabia and the Mesotethys, and the Tauride part of Eurasia, the Herodotus basin oceanic crust subducted along the Eratosthenes Arc, below the short-lived abandoned Levant back-arc basin. Such a plate configuration assumes regional shear zones, as follows: (1) between the Eratosthenes Arc from the south and the Kyrenia Arc from the north: the NW–SE Carmel–Azraq–Sirhan fault system; (2) between the Sinai and the African plates: the Suez fault system; (3) between the Mesotethys and the African plates: the northern Egypt–Sinai–Negev west–east transversal fault system. Distinct tectonomagmatic quiescence between Late Maastrichtian and Late Eocene time allowed thermal relaxation and subsidence of the Levant margin until the apparent achievement of local isostatic compensation and the consequent development of the longest transgression over the Afro-Arabian ramp. Supplementary material: Details on the construction of the Bouguer gravity map are available at http://www.geolsoc.org.uk/SUP18404.


Journal of Geophysical Research | 2015

Melt instabilities in an intraplate lithosphere and implications for volcanism in the Harrat Ash-Shaam volcanic field (NW Arabia)

Klaus Regenauer-Lieb; Gideon Rosenbaum; Vladimir Lyakhovsky; Jie Liu; Roberto F. Weinberg; Amit Segev; Yishai Weinstein

We investigate melt generation in a slowly extending lithosphere with the aim of understanding the spatial and temporal relationships between magmatism and preexisting rift systems. We present numerical models that consider feedback between melt generation and lithospheric deformation, and we incorporate three different damage mechanisms: brittle damage, creep damage, and melt damage. Melt conditions are calculated with a Helmholtz free energy minimization method, and the energy equation is solved self-consistently for latent heat and shear heating effects. Using a case of a slowly extending (1-1.5mm/yr) continental lithosphere with a relatively low surface heat flow (similar to 50mW/m(2)), we show that melt-rich shear bands are nucleated at the bottom of the lithosphere as a result of shear heating and damage mechanisms. Upon further deformation, melt zones intersect creep damage zones, thus forming channels that may be used for the melt to migrate upward. If a preexisting structure resides only in the brittle crust, it does not control the path of melt migration to the surface, and melt-filled channels propagate from the bottom upwards, independently of upper crustal structures. In contrast, a preexisting weak structure that reaches a critical depth of 20km allows fast (similar to 2Ma) propagation of melt-filled channels that link melt damage from the bottom of the lithosphere to near-surface structures. Our model results may explain the short time scale, volume, and magma extraction from the asthenosphere through a low surface heat flow lithosphere, such as observed, for example, in the Harrat Ash-Shaam volcanic field (northwestern Arabia), which developed in the Arabian Plate and is spatially linked to the Azraq-Sirhan Graben.


Tectonophysics | 2006

The structure, isostasy and gravity field of the Levant continental margin and the southeast Mediterranean area

Amit Segev; Michael Rybakov; Vladimir Lyakhovsky; Avraham Hofstetter; Gidon Tibor; Vladimir Goldshmidt; Zvi Ben Avraham


Tectonophysics | 2000

Synchronous magmatic cycles during the fragmentation of Gondwana: radiometric ages from the Levant and other provinces

Amit Segev


Tectonophysics | 2011

Middle-Late Eocene structure of the southern Levant continental margin — Tectonic motion versus global sea-level change

Amit Segev; Uri Schattner; Vladimir Lyakhovsky


Geochemistry Geophysics Geosystems | 2012

Deformation and seismicity associated with continental rift zones propagating toward continental margins

Vladimir Lyakhovsky; Amit Segev; Uri Schattner; Ram Weinberger


Journal of Geodynamics | 2011

History of faulting and magmatism in the Galilee (Israel) and across the Levant continental margin inferred from potential field data

Amit Segev; Michael Rybakov


Earth-Science Reviews | 2014

Continental transform-rift interaction adjacent to a continental margin: The Levant case study

Amit Segev; Vladimir Lyakhovsky; Ram Weinberger


Geophysical Journal International | 2012

A crustal model for Zealandia and Fiji

Amit Segev; Michael Rybakov; Nick Mortimer


Earth-Science Reviews | 2017

Late Oligocene and Miocene different seaways to the Red Sea–Gulf of Suez rift and the Gulf of Aqaba–Dead Sea basins

Amit Segev; Yoav Avni; Jacob Shahar; Reli Wald

Collaboration


Dive into the Amit Segev's collaboration.

Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Michael Rybakov

United States Geological Survey

View shared research outputs
Top Co-Authors

Avatar

Ram Weinberger

Ben-Gurion University of the Negev

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar

Jie Liu

University of Western Australia

View shared research outputs
Top Co-Authors

Avatar

Klaus Regenauer-Lieb

University of New South Wales

View shared research outputs
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Top Co-Authors

Avatar
Researchain Logo
Decentralizing Knowledge