scholarly journals Partitioning of crustal shortening during continental collision: 2‐D thermomechanical modeling

2017 ◽  
Vol 122 (1) ◽  
pp. 592-606 ◽  
Author(s):  
Jie Liao ◽  
Taras Gerya
Keyword(s):  
Continental Collision ◽  
Crustal Shortening ◽  
Thermomechanical Modeling

scholarly journals Comment on “Relict Basin Closure and Crustal Shortening Budgets During Continental Collision: An Example From Caucasus Sediment Provenance” by Cowgill et al. (2016)

Tectonics ◽  
2018 ◽  
Vol 37 (3) ◽  
pp. 1006-1016 ◽  
Author(s):  
Stephen J. Vincent ◽  
Aline Saintot ◽  
Jon Mosar ◽  
Aral I. Okay ◽  
Anatoly M. Nikishin
Keyword(s):  
Continental Collision ◽  
Sediment Provenance ◽  
Crustal Shortening

Neoarchean decoupling of upper- and mid-crustal tectonothermal domains in the southeast Slave Province: evidence from the Walmsley Lake area

2005 ◽  
Vol 42 (6) ◽  
pp. 869-894 ◽  
Author(s):  
S Cairns ◽  
C Relf ◽  
K MacLachlan ◽  
W J Davis
Keyword(s):  
High Strain ◽  
Amphibolite Facies ◽  
Lake Area ◽  
Structural Topology ◽  
Crustal Shortening ◽  
Rock Types ◽  
Slave Province ◽  
Crustal Transect ◽  
Thermomechanical Modeling ◽  
Tectonothermal Event

The Walmsley Lake area of the southeastern Slave Province, Northwest Territories, exposes a crustal transect from greenschist through to upper amphibolite facies. Two tectonothermal crustal domains are proposed based on disparate tectonic histories and rock types. Within the upper tectonothermal domain, D1 deformation reached lower amphibolite facies prior to 2614 Ma and associated M1 metamorphic conditions outlasted D1. Peak M2 conditions reached middle amphibolite facies prior to 2603 Ma and outlasted D2 deformation. Deformation style and metamorphic sequencing during these two pre-2600 Ma events are consistent with regional crustal shortening and thickening in the upper tectonothermal domain. At mid-crustal levels in the lower tectonothermal domain, a third tectonothermal event (D3–M3) produced uppermost amphibolite-facies peak metamorphic conditions, transposed preexisting fabrics to shallow dips, and produced a subhorizontal foliation and recumbent folds at ca. 2583 Ma. D3 structures are not present in the upper tectono thermal domain, however, evidence of M3 heating is locally displayed in rocks at the base of the upper tectonothermal domain. Upper and lower domains were structurally decoupled during the D3–M3 event. In rare places where the zone between the two domains outcrops, it comprises a narrow high-strain zone. The metamorphic and structural topology of the Walmsley Lake area is consistent with the topology predicted from thermomechanical modeling and modern observations of gravitational accommodation in structurally thickened crust.

scholarly journals SUPERGRUPO ESPINHAÇO: MODELO DE EVOLUÇÃO GEODINÂMICA

1995 ◽  
Author(s):  
Ivo Antônio Dussin ◽  
Tânia Mara Dussin
Keyword(s):  
Continental Collision ◽  
Rift Basin ◽  
The South ◽  
Tectonic Event ◽  
Boundary Area ◽  
Crustal Shortening ◽  
Tectonic History ◽  
Eastern Brazil ◽  
Igneous Activity ◽  
Metasedimentary Sequence

The São Francisco Craton in Eastern brazil, one of the major shield areas forming the South AmericanPlatform, had its present-day configuration defined by the remobilisation of its edges during the Brasilianoorogeny in the Neoproterozoic. This tectonic event produced deformation and closure of the Middle toNeoproterozoic basins represented in the neighbouring craton regions. In the south-east boundary area ofthe craton, the Espinhaço Supergroup, a thick metasedimentary sequence, represents one of these basins.This region has a long tectonic history. About 1.7 Ga, after the Paleoproterozoic period of deformationand igneous activity of the Transamazonian Orogeny, the crust was affected by an extensional eventwhich resulted in fragmentation and development of a rift basin where the Espinhaço Supergroup wasdeposited. About 900 Ma, a second extensional event represented by emplacement of mafic dikes in areasadjacent to the craton and formation of a new rift basin toward East is represented. The tectonic evolvedinto continental collision producing crustal shortening and thickening with westward tectonic transportonto the craton.

scholarly journals Relict basin closure and crustal shortening budgets during continental collision: An example from Caucasus sediment provenance

Tectonics ◽  
2016 ◽  
Vol 35 (12) ◽  
pp. 2918-2947 ◽  
Author(s):  
Eric Cowgill ◽  
Adam M. Forte ◽  
Nathan Niemi ◽  
Boris Avdeev ◽  
Alex Tye ◽  
...  
Keyword(s):  
Continental Collision ◽  
Sediment Provenance ◽  
Crustal Shortening

THETYS SUBDUCTION AND CONTINENTAL COLLISION FROM POTENTIAL FIELD MODELLING

2018 ◽  
Author(s):  
Hans Thybo ◽  
◽  
Vahid Teknik ◽  
Vahid Teknik ◽  
Abdolreza Ghods ◽  
...  
Keyword(s):  
Potential Field ◽  
Continental Collision ◽  
Field Modelling ◽  
Potential Field Modelling

THE EVOLUTION OF CONTINENTAL COLLISION CONTROLLED BY THE WIDTH OF ADJACENT SUBDUCTION ZONE

2018 ◽  
Author(s):  
David Willis ◽  
◽  
Peter Betts ◽  
Louis Moresi ◽  
Laurent Ailleres ◽  
...  
Keyword(s):  
Subduction Zone ◽  
Continental Collision
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