scholarly journals Late Oligocene high-temperature shear zones in the core of the Higher Himalayan Crystallines (Lower Dolpo, western Nepal)

Tectonics ◽  
2010 ◽  
Vol 29 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
R. Carosi ◽  
C. Montomoli ◽  
D. Rubatto ◽  
D. Visonà
Keyword(s):  
High Temperature ◽  
Shear Zones ◽  
Late Oligocene ◽  
The Core ◽  
Temperature Shear

Restraining bends in high temperature shear zones: The “Central Cameroon Shear Zone”, Central Africa

2008 ◽  
Vol 52 (1-2) ◽  
pp. 9-20 ◽  
Author(s):  
Emmanuel Njonfang ◽  
Vincent Ngako ◽  
Christian Moreau ◽  
Pascal Affaton ◽  
Hervé Diot
Keyword(s):  
High Temperature ◽  
Shear Zone ◽  
Central Africa ◽  
Shear Zones ◽  
Temperature Shear

A U/Pb age for the Shetland Islands oceanic fragment, Scottish Caledonides: evidence from anatectic plagiogranites in ‘layer 3’ shear zones

1991 ◽  
Vol 128 (6) ◽  
pp. 667-671 ◽  
Author(s):  
John G. Spray ◽  
Gregory R. Dunning
Keyword(s):  
High Temperature ◽  
Partial Melting ◽  
High Precision ◽  
Crustal Deformation ◽  
Shear Zones ◽  
Shetland Islands ◽  
Fluid Infiltration ◽  
Temperature Shear ◽  
Canadian Appalachians ◽  
Norwegian Caledonides

AbstractHigh precision U/Pb data obtained from zircons extracted from plagiogranite within the gabbro unit of the Shetland Islands oceanic fragment of northeast Scotland yield an age of 492 ± 3 Ma. Field relations indicate that the plagiogranites were generated by the partial melting of amphibolitized gabbros within high-temperature shear zones formed due to crustal deformation and fluid infiltration occurring in proximity to a spreading centre. The U/Pb data therefore constrain the crystallization age of the Shetland complex. This age is similar to U/Pb ages obtained from the Leka (497±2 Ma), Karmoy (493+7-4 Ma) and Gulfjellet (489±3 Ma) oceanic fragments of the Norwegian Caledonides, and the Pipestone Pond (4943-2 Ma) and Betts Cove (4893-2 Ma) oceanic fragments of the Canadian Appalachians.

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