Neodymium isotopic evidence for the tectonic assembly of Late Archean crust in the Slave Province, northwest Canada

1992 ◽  
Vol 111 (4) ◽  
pp. 493-504 ◽  
Author(s):  
William J. Davis ◽  
Ernst Hegner
Keyword(s):  
Isotopic Evidence ◽  
Slave Province ◽  
Archean Crust

The geochronology of the granitic rocks along the Bear–Slave Structural Province boundary, northwest Canadian Shield

1977 ◽  
Vol 14 (6) ◽  
pp. 1356-1373 ◽  
Author(s):  
Rosaline Frith ◽  
R. A. Frith ◽  
R. Doig
Keyword(s):  
Age Groups ◽  
Canadian Shield ◽  
Granitic Rocks ◽  
Thermal Event ◽  
Slave Province ◽  
Fault Block ◽  
Granitic Intrusions ◽  
Main Period ◽  
Archean Crust ◽  
Archean Basement

Archean granitic rocks along the southern Bear–Slave boundary fall into three age groups: the oldest are 3000 Ma old intrusive tonalites and granodiorites that form the basement to the Yellowknife Supergroup; the second are syn-volcanic granitic intrusions of ~ 2700 Ma; and the youngest are ~ 2560 Ma granitic and migmatitic diapirs formed in part from supracrustal and granitic rocks. Two Proterozoic thermal events are recognized within the Slave Province. A ~ 2300 Ma event may be related to early rift breakup of the Archean crust and is recorded in Rb–Sr whole-rock and K–Ar mineral systems. A ~ 1970 Ma event was less intense but may be related to further rifting of the Archean and to fault-block depression of the Indin Lake supracrustal basin, the intrusion of a group of granodioritic stocks, and the formation or granitic pegmatite.Within the Bear Province, evidence of a ~ 2700 Ma intrusive event and a ~ 2300 Ma thermal event are preserved in Rb–Sr whole rock systems. Practically all the granitic rocks of the Bear Province, including the Hepburn batholitic rocks, are thought to have been derived wholly or partly from Archean rocks. The main period of Hudsonian deformation and metamorphism was accompanied by a diapiric remobilization of the Archean basement about 1800 Ma ago. Twelve Rb–Sr isochrons, as well as other published geochronologic data from the region, support these conclusions.

The Slave Province: a distinct Archean craton

1992 ◽  
Vol 29 (10) ◽  
pp. 2072-2086 ◽  
Author(s):  
W. A. Padgham ◽  
W. K. Fyson
Keyword(s):  
Tectonic Evolution ◽  
Large Scale ◽  
Unique Feature ◽  
Volcanic Rocks ◽  
Gold Deposits ◽  
Superior Province ◽  
Slave Province ◽  
Archean Crust ◽  
Distinct Features ◽  
Base Metal Mineralization

The Slave Province is a relatively small Late Archean craton that exhibits distinctive rock associations and structures. By comparison with the much larger Superior Province, differences are evident in (i) the abundance of sedimentary versus volcanic rocks and of felsic versus mafic volcanic rocks; (ii) the greater evidence for sialic basement; (iii) the higher proportion of more evolved potassium-rich granite; (iv) the type, setting, and timing of gold and base-metal mineralization; and (v) a regional zonation of gold deposits that seems to be a unique feature of the Slave Province. Contrasts in structure are also significant: the large-scale linear belts and boundaries (sutures?) that characterize the Superior Province have no obvious counterpart in the Slave Province. Despite some similarities with other Archean cratons, the distinct features of the Slave Province are important, for they imply that no single Archean craton should be used to develop a universal paradigm for the genesis and tectonic evolution of Archean crust.

Spectroscopic and oxygen isotopic evidence for low and high temperature origin of talc

1986 ◽  
Vol 109 (3) ◽  
pp. 253-263 ◽  
Author(s):  
Yves Noack ◽  
Alain Decarreau ◽  
Alain Manceau
Keyword(s):  
High Temperature ◽  
Isotopic Evidence ◽  
Oxygen Isotopic

Anton terrane revisited: Late Archean exhumation of a moderate-pressure granulite terrane in the western Slave Province

Geology ◽  
2000 ◽  
Vol 28 (12) ◽  
pp. 1075-1078
Author(s):  
S.J. Pehrsson ◽  
T. Chacko ◽  
M. Pilkington ◽  
M.E. Villeneuve ◽  
K. Bethune
Keyword(s):  
Moderate Pressure ◽  
Slave Province

Origin of the Sudbury Complex by Meteoritic Impact: Neodymium Isotopic Evidence

Science ◽  
1985 ◽  
Vol 230 (4724) ◽  
pp. 436-439 ◽  
Author(s):  
B. E. FAGGART ◽  
A. R. BASU ◽  
M. TATSUMOTO
Keyword(s):  
Meteoritic Impact ◽  
Isotopic Evidence
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