A trace element perspective on Archean crust formation and on the presence or absence of Archean subduction

2008 ◽  
pp. 31-50 ◽  
Author(s):  
Stephen Foley
Keyword(s):  
Trace Element ◽  
Crust Formation ◽  
Archean Crust

Nd evidence for extensive Archean basement in the western Churchill Province, Canada

1986 ◽  
Vol 23 (9) ◽  
pp. 1433-1437 ◽  
Author(s):  
C. D. Frost ◽  
R. A. Burwash
Keyword(s):  
Drill Hole ◽  
Crust Formation ◽  
Southern Alberta ◽  
Northern Saskatchewan ◽  
Archean Crust ◽  
Northeastern Alberta ◽  
Archean Basement

To determine the extent of reworked Archean crust in the western Churchill Province, we have examined Sm–Nd crustal residence ages of basement cores in southern Alberta and southwestern Saskatchewan along with crustal residence ages calculated for other Sm–Nd data available from the Churchill Province. The deep drill hole samples from the Interior Platform give Sm–Nd crustal residence ages that average 2.8 Ga. Granulites from northeastern Alberta and composite gneisses from northern Saskatchewan also provide Archean crustal residence ages. These data demonstrate that the presence of reworked Archean crust in the western Churchill Province is more widespread than has been confirmed previously. We suggest that Sm–Nd crustal residence ages are valuable estimates of crust formation times, especially in orogenic areas where other isotope systems have been disturbed.

Constraints on Archean crust formation from open system models of Earth evolution

2019 ◽  
Vol 530 ◽  
pp. 119307 ◽  
Author(s):  
Seema Kumari ◽  
Debajyoti Paul ◽  
Andreas Stracke
Keyword(s):  
Open System ◽  
Crust Formation ◽  
System Models ◽  
Archean Crust

Mechanisms of Archean crust formation inferred from high-precision HFSE systematics in TTGs

2011 ◽  
Vol 75 (15) ◽  
pp. 4157-4178 ◽  
Author(s):  
J. Elis Hoffmann ◽  
Carsten Münker ◽  
Tomas Næraa ◽  
Minik T. Rosing ◽  
Daniel Herwartz ◽  
...  
Keyword(s):  
High Precision ◽  
Crust Formation ◽  
Archean Crust

Geochemistry of xenolithic eclogites from West Africa, part I: A link between low MgO eclogites and archean crust formation

2001 ◽  
Vol 65 (9) ◽  
pp. 1499-1527 ◽  
Author(s):  
Matthias G. Barth ◽  
Roberta L. Rudnick ◽  
Ingo Horn ◽  
William F. McDonough ◽  
Michael J. Spicuzza ◽  
...  
Keyword(s):  
West Africa ◽  
Crust Formation ◽  
Archean Crust
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