Pressure–temperature–time–deformation ( P–T–t–d ) path for Devonian forearc deposits in the Imjingang Belt, South Korea: implications for Permian–Triassic collisional orogenesis on the eastern margin of Eurasia

2021 ◽  
Author(s):  
Hyeong Soo Kim ◽  
Jin‐Han Ree ◽  
Hee‐Cheol Kang ◽  
Keewook Yi
Keyword(s):  
South Korea ◽  
Time Deformation ◽  
Eastern Margin ◽  
Temperature Time ◽  
Collisional Orogenesis

scholarly journals Pressure–temperature–time–deformation path of kyanite-bearing migmatitic paragneiss in the Kali Gandaki valley (Central Nepal): Investigation of Late Eocene–Early Oligocene melting processes

Lithos ◽  
2015 ◽  
Vol 231 ◽  
pp. 103-121 ◽  
Author(s):  
Salvatore Iaccarino ◽  
Chiara Montomoli ◽  
Rodolfo Carosi ◽  
Hans-Joachim Massonne ◽  
Antonio Langone ◽  
...  
Keyword(s):  
Late Eocene ◽  
Deformation Path ◽  
Time Deformation ◽  
Early Oligocene ◽  
Central Nepal ◽  
Temperature Time

scholarly journals Absence of evidence for Palaeoproterozoic eclogite-facies metamorphism in East Antarctica: no record of subduction orogenesis during Nuna development

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dillon A. Brown ◽  
Laura J. Morrissey ◽  
John W. Goodge ◽  
Martin Hand
Keyword(s):  
Plate Boundary ◽  
South Australia ◽  
East Antarctica ◽  
Geological Evidence ◽  
Crustal Shortening ◽  
Eastern Margin ◽  
Facies Metamorphism ◽  
Eclogite Facies ◽  
Early Palaeozoic ◽  
Collisional Orogenesis

AbstractThe cratonic elements of proto-Australia, East Antarctica, and Laurentia constitute the nucleus of the Palaeo-Mesoproterozoic supercontinent Nuna, with the eastern margin of the Mawson Continent (South Australia and East Antarctica) positioned adjacent to the western margin of Laurentia. Such reconstructions of Nuna fundamentally rely on palaeomagnetic and geological evidence. In the geological record, eclogite-facies rocks are irrefutable indicators of subduction and collisional orogenesis, yet occurrences of eclogites in the ancient Earth (> 1.5 Ga) are rare. Models for Palaeoproterozoic amalgamation between Australia, East Antarctica, and Laurentia are based in part on an interpretation that eclogite-facies metamorphism and, therefore, collisional orogenesis, occurred in the Nimrod Complex of the central Transantarctic Mountains at c. 1.7 Ga. However, new zircon petrochronological data from relict eclogite preserved in the Nimrod Complex indicate that high-pressure metamorphism did not occur in the Palaeoproterozoic, but instead occurred during early Palaeozoic Ross orogenesis along the active convergent margin of East Gondwana. Relict c. 1.7 Ga zircons from the eclogites have trace-element characteristics reflecting the original igneous precursor, thereby casting doubt on evidence for a Palaeoproterozoic convergent plate boundary along the current eastern margin of the Mawson Continent. Therefore, rather than a Palaeoproterozoic (c. 1.7 Ga) history involving subduction-related continental collision, a pattern of crustal shortening, magmatism, and high thermal gradient metamorphism connected cratons in Australia, East Antarctica, and western Laurentia at that time, leading eventually to amalgamation of Nuna at c. 1.6 Ga.

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