Pressure–temperature–time constraints on gneiss dome formation in an intracontinental orogen

2021 ◽  
Author(s):  
Jan Varga ◽  
Tom Raimondo ◽  
Laura Morrissey ◽  
David E. Kelsey ◽  
Martin Hand
Keyword(s):  
Time Constraints ◽  
Gneiss Dome ◽  
Dome Formation ◽  
Temperature Time

Pressure–temperature–time constraints on the Maghrebide mountain building: evidence from the Rif–Betic transect (Morocco, Spain), Algerian correlations, and geodynamic implications

2006 ◽  
Vol 338 (1-2) ◽  
pp. 92-114 ◽  
Author(s):  
André Michard ◽  
François Negro ◽  
Omar Saddiqi ◽  
Mohamed L. Bouybaouene ◽  
Ahmed Chalouan ◽  
...  
Keyword(s):  
Time Constraints ◽  
Mountain Building ◽  
Temperature Time

On the origin of Early Proterozoic gneiss domes and metamorphic nodes, northern Michigan

1996 ◽  
Vol 33 (7) ◽  
pp. 1053-1053 ◽  
Author(s):  
David Schneider ◽  
Daniel Holm ◽  
Daniel Lux
Keyword(s):  
Gravity Anomaly ◽  
Gneiss Dome ◽  
Near Surface ◽  
Dome Formation ◽  
Crustal Shortening ◽  
Gneiss Domes ◽  
History Of ◽  
The Republic ◽  
Different Origins ◽  
Northern Michigan

Biotite 40αr/39αr cooling ages from medium-pressure (500–600 MPa) rocks in the Watersmeet district, northern Michigan, suggest significant cooling–uplift and concomitant deformation during gneiss dome formation at~1755 Ma, well after the close of the 1870–1830 Ma Penokean orogeny. However, an 1822 Ma hornblende plateau date indicates that the isograds surrounding the dome are Penokean in age. We attribute gneiss dome formation and doming of Penokean-aged isograds to an episode of orogenic collapse superimposed on an earlier history of crustal shortening. This contrasts with the compressional origin for gneiss domes preserved in the low-pressure (200–300 MPa) Republic district. The different origins may reflect the fact that collapse was localized along the overthickened region of the orogenic belt. In contrast to the Watersmeet area, hornblende and biotite 40Ar/39Ar ages obtained from the Republic area are 1720–1680 Ma. Given the relatively shallow depth of this region, it is unlikely that temperatures remained above 500 °C for over 100 Ma following collision. We interpret these ages to reflect a major thermal event that may have been responsible for formation of the Republic metamorphic node. This interpretation is supported by the recent identification of an ~1730 Ma pluton that is likely the cause of a large, near-surface, negative gravity anomaly coincident with the node, and by the fact that the metamorphic node crosscuts Penokean structures.

Himalayan gneiss dome formation in the middle crust and exhumation by normal faulting: New geochronology of Gianbul dome, northwestern India

2014 ◽  
Vol 127 (1-2) ◽  
pp. 162-180 ◽  
Author(s):  
Forrest Horton ◽  
Jeffrey Lee ◽  
Bradley Hacker ◽  
Meilani Bowman-Kamaha’o ◽  
Michael Cosca
Keyword(s):  
Normal Faulting ◽  
Gneiss Dome ◽  
Dome Formation ◽  
Middle Crust ◽  
Northwestern India

The giant Shakhdara migmatitic gneiss dome, Pamir, India-Asia collision zone: 2. Timing of dome formation

Tectonics ◽  
2013 ◽  
Vol 32 (5) ◽  
pp. 1404-1431 ◽  
Author(s):  
Konstanze Stübner ◽  
Lothar Ratschbacher ◽  
Carsten Weise ◽  
Judy Chow ◽  
Jakob Hofmann ◽  
...  
Keyword(s):  
Gneiss Dome ◽  
Dome Formation ◽  
Collision Zone ◽  
Migmatitic Gneiss

Clinopyroxene–rutile phyllonites from the East Tenda Shear Zone (Alpine Corsica, France): pressure–temperature–time constraints to the Alpine reworking of Variscan Corsica

2012 ◽  
Vol 169 (6) ◽  
pp. 723-732 ◽  
Author(s):  
Matteo Maggi ◽  
Federico Rossetti ◽  
Fernando Corfu ◽  
Thomas Theye ◽  
Torgeir B. Andersen ◽  
...  
Keyword(s):  
Shear Zone ◽  
Time Constraints ◽  
Temperature Time
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