Results 181 to 190 of about 3,632 (206)
Some of the next articles are maybe not open access.
A possible Himalayan microcontinent
Nature, 1976ONE of the most significant features of the Himalayan mountain chain is its crystalline core which separates the tectonic belts of the Palaeo–Mesozoic–Cainozoic rock sequences of the Himalaya in the south and those of the Trans-Himalaya in the north. This crystalline core is described as the Central Crystalline Zone1 and the Central Barrier2. There are
openaire +1 more source
Evidence for discrete Archean microcontinents in the Yangtze Craton
Precambrian Research, 2021Abstract It is unclear whether most Archean continents have always existed in their present-day size, or were initially microcontinents or supercratons. The Archean evolution of the Yangtze Craton in South China provides an ideal opportunity to reveal Archean continental architecture.
Tian Zhao +6 more
openaire +1 more source
Dynamics of multiple microcontinent accretion during oceanic subduction
2023Microcontinent accretion during oceanic subduction is one of the main contributors to continental crustal growth. Many of the continental mountain belts we find today were built from accretionary orogenesis, for example, the Cordillera of the west coast of the Americas, the European Alps, and the Australian Lachlan orogen.
Zoltán Erdős +2 more
openaire +1 more source
Microcontinents in the Atlantic ocean
Geotectonics, 2013Fragments of continental structures are widespread in the North and South Atlantic and almost absent in the central segment of the ocean. This implies that the fragments are related to the geodynamics of the surrounding continents. The fragments are subdivided into two groups: microcontinents and submarine prominences of marginal continental blocks ...
openaire +1 more source
The margins of the South Orkney microcontinent
Journal of the Geological Society, 1988Marine geophysical studies of the South Orkney microcontinent show two intersecting tectonic fabrics of different age. The older fabric is oriented E-W, and represents the magmatic arc and fore-arc created by subduction-related processes at the Pacific margin during the Mesozoic.
King, Edward C., Barker, Peter F.
openaire +2 more sources
Characterising rocks dredged from the Gulden Draak microcontinent
2022Gulden Draak is a bathymetric feature 2-3 kilometres below the surface of the Indian Ocean 2,000 kilometres west of Perth, Western Australia. Four samples were selected from the continental rocks dredged from the knoll, three orthogneisses and one paragneiss.
openaire +1 more source
Mesozoic tectono-stratigraphic evolution of the Seychelles microcontinent
Sedimentary Geology, 1995Abstract The Seychelles region developed as a unique continental sliver through the three phases of rift tectonism that, since the Late Permian, created the western Indian Ocean. The history of rifting in Seychelles can perhaps be traced back to ∼ 700 Ma when the granites that form the central islands were emplaced.
Ph.S. Plummer, E.R. Belle
openaire +1 more source
Iceland: mantle plume or microcontinent? A zircon study
2023In recent years, unexpected continental crust in areas presumed to be purely oceanic in nature has been discovered, indicated by the presence of Paleozoic zircons in rock samples. Notable examples include the Rio Grande Rise, Mauritius, and potentially also the Comoros islands, which have all previously been interpreted as mantle plume edifices ...
Alexander Peace +3 more
openaire +1 more source
Geological Society, London, Special Publications, 2009
Abstract In recent decades various research studies have focused on the reconstruction of Palaeozoic Europe, reflecting the complex geodynamic history related to the formation of the supercontinent Pangaea. It has been demonstrated that Palaeozoic Europe comprises a series of tectonostratigraphical units, or ‘terranes’, located between the ...
Thomas Servais, Manuel Sintubin
openaire +1 more source
Abstract In recent decades various research studies have focused on the reconstruction of Palaeozoic Europe, reflecting the complex geodynamic history related to the formation of the supercontinent Pangaea. It has been demonstrated that Palaeozoic Europe comprises a series of tectonostratigraphical units, or ‘terranes’, located between the ...
Thomas Servais, Manuel Sintubin
openaire +1 more source
An exotic Mesoarchean microcontinent: The Coorg Block, southern India
Gondwana Research, 2015Abstract Sandwiched between the Dharwar Craton in the north and the Neoarchean–Proterozoic crustal blocks to the south, the Coorg Block in southern India is composed dominantly of a suite of arc magmatic rocks including charnockites, TTG (tonalite–trondhjemite–granodiorite)-related granitoid suite and felsic volcanic tuffs together with minor ...
Santosh, M. +5 more
openaire +2 more sources