Results 31 to 40 of about 3,632 (206)

Magnetic anomaly of the Jõhvi iron ore, northeastern Estonia, controlled by subvertical remanent magnetization [PDF]

open access: yesEstonian Journal of Earth Sciences, 2020
The Jõhvi magnetic anomaly is situated within the Jõhvi structural zone that is part of the Bergslagen–Livonia microcontinent. Drilling in the 1930s and 1960s has revealed a complex of magnetite ore alternating with granites, pegmatites and gneisses.
Jüri Plado   +3 more
doaj   +1 more source

Complex rift geometries resulting from inheritance of pre-existing structures: Insights and regional implications from the Barmer Basin rift [PDF]

open access: yes, 2014
Structural studies of the Barmer Basin in Rajasthan, northwest India, demonstrate the important effect that pre-existing faults can have on the geometries of evolving fault systems at both the outcrop and basin-scale.
Bladon, AJ, Burley, SD, Clarke, SM
core   +1 more source

Tectonic reconstructions for paleobathymetry in Drake Passage [PDF]

open access: yes, 2014
A minimum-complexity tectonic reconstruction, based on published and new basin opening models, depicts how the Scotia Sea grew by Cenozoic plate divergence, dismembering a Jurassic sheared margin of Gondwana.
Eagles, Graeme, Jokat, Wilfried
core   +1 more source

GEOCHEMISTRY AND ORIGIN OF THE EASTERN SAYAN OPHIOLITES, TUVA-MONGOLIAN MICROCONTINENT (SOUTHERN SIBERIA)

open access: yesГеодинамика и тектонофизика, 2017
The Eastern Sayan ophiolites (1020 Ma) of the Tuva-Mongolian microcontinent are believed to be the most ancient ophiolite of the Central Asian Orogenic Belt [Khain et al., 2002].
V. A. Belyaev   +6 more
doaj   +1 more source

The age and origin of the central Scotia Sea [PDF]

open access: yes, 2010
Opening of the Drake Passage gateway between the Pacific and Atlantic oceans has been linked in various ways to Cenozoic climate changes. From the oceanic floor of Drake Passage, the largest of the remaining uncertainties in understanding this opening is
Eagles, Graeme
core   +1 more source

Upper mantle anisotropy beneath the Seychelles microcontinent [PDF]

open access: yesJournal of Geophysical Research: Solid Earth, 2005
The Seychelles plateau is a prime example of a microcontinent, yet mechanisms for its creation and evolution are poorly understood. Recently acquired teleseismic data from a deployment of 26 stations on 18 islands in the Seychelles are analyzed to study upper mantle seismic anisotropy using SKS splitting results. Strong microseismic noise is attenuated
Hammond, J.   +7 more
openaire   +5 more sources

PETROGRAPHY AND MINERALOGY OF RETROGRADE METAPERIDOTITES FROM ALAG KHADNY ACCRETIONARY WEDGE (SW MONGOLIA): FLUID MODIFICATION IN SUPRASUBDUCTION ZONE

open access: yesГеодинамика и тектонофизика, 2017
The Main Mongolian Lineament (MML) separates northern “Caledonian” tectonic province from southern “Hercynian” in SW part of Mongolia of the Central Asian Orogenic Belt (CAOB). The position of Eastern part of MML is widely discussed at recent time, since,
M. A. Gornova   +5 more
doaj   +1 more source

The Van Microplate: A New Microcontinent at the Junction of Iran, Turkey, and Armenia

open access: yesFrontiers in Earth Science, 2021
In northwestern Iran, magmatic activity occurred during three main intervals: The Cretaceous, Eocene, and Miocene-Quaternary. The first two phases of magmatic activity are more consistent with arc-type magmatism on an active continental margin; whereas ...
Hossein Azizi, Motohiro Tsuboi
doaj   +1 more source

The Hudson Bay Lithospheric Experiment (HuBLE) : Insights into Precambrian Plate Tectonics and the Development of Mantle Keels [PDF]

open access: yes, 2015
The UK component of HuBLE was supported by Natural Environment Research Council (NERC) grant NE/F007337/1, with financial and logistical support from the Geological Survey of Canada, Canada–Nunavut Geoscience Office, SEIS-UK (the seismic node of NERC ...
Bastow, I. D.   +8 more
core   +2 more sources

Paleozoic high-temperature metamorphism and deformation related to Proto-Tethys closure and Paleo-Tethys opening in the north of Central-East Iranian Microcontinent, based on the mineralogy of Airakan metagranite [PDF]

open access: yesپترولوژی, 2023
Granites are one of the most abundant rock groups formed the continental crust, and are considered for investigating the temperature conditions of their formation and metamorphism. Thus, they are a unique window to magmatism and tectonic evolution of the
Nargess Shirdashtzadeh
doaj   +1 more source

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