Detrital zircon evidence for eclogite formation by basal subduction erosion—An example from the Yukon-Tanana composite arc, Canadian Cordillera

2017 ◽  
pp. 173-189
Author(s):  
J.A. Gilotti ◽  
W.C. McClelland ◽  
C.R. van Staal ◽  
M.B. Petrie
Keyword(s):  
Detrital Zircon ◽  
Canadian Cordillera ◽  
Subduction Erosion

scholarly journals Lithofacies control in detrital zircon provenance studies: Insights from the Cretaceous Methow basin, southern Canadian Cordillera

2003 ◽  
Vol 115 (8) ◽  
pp. 899-915 ◽  
Author(s):  
Kathleen DeGraaff-Surpless ◽  
J. Brian Mahoney ◽  
Joseph L. Wooden ◽  
Michael O. McWilliams
Keyword(s):  
Detrital Zircon ◽  
Canadian Cordillera ◽  
Provenance Studies

Detrital zircon U Pb ages and Hf-isotopes from Eocene intermontane basin deposits of the southern Canadian Cordillera

2021 ◽  
pp. 105969
Author(s):  
Erica Rubino ◽  
Andrew Leier ◽  
Elizabeth J. Cassel ◽  
S. Bruce Archibald ◽  
Zachary Foster-Baril ◽  
...  
Keyword(s):  
Detrital Zircon ◽  
Hf Isotopes ◽  
Canadian Cordillera ◽  
Intermontane Basin

scholarly journals Provenance of the Incipient Passive Margin of NW Laurentia (Neoproterozoic): Detrital Zircon from Continental Slope and Basin Floor Deposits of the Windermere Supergroup, Southern Canadian Cordillera

Lithosphere ◽  
2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Thomas Hadlari ◽  
R. W. C. Arnott ◽  
W. A. Matthews ◽  
T. P. Poulton ◽  
K. Root ◽  
...  
Keyword(s):  
Continental Slope ◽  
Continental Margin ◽  
Detrital Zircon ◽  
Drainage System ◽  
Source Area ◽  
Passive Margin ◽  
Canadian Cordillera ◽  
The North ◽  
Windermere Supergroup ◽  
Slope Deposits

Abstract The origin of the passive margin forming the paleo-Pacific western edge of the ancestral North American continent (Laurentia) constrains the breakup of Rodinia and sets the stage for the Phanerozoic evolution of Laurentia. The Windermere Supergroup in the southern Canadian Cordillera records rift-to-drift sedimentation in the form of a prograding continental margin deposited between ~730 and 570 Ma. New U-Pb detrital zircon analysis from samples of the post-rift deposits shows that the ultimate source area was the shield of NW Laurentia and the near uniformity of age spectra are consistent with a stable continental drainage system. No western sediment source area was detected. Detrital zircon from postrift continental slope deposits are a proxy for ca. 676-656 Ma igneous activity in the Windermere basin, likely related to continental breakup, and set a maximum depositional age for slope deposits on the eastern side of the basin at 652±9 Ma. These results are consistent with previous interpretations. The St. Mary-Moyie fault zone near the Canada-U.S. border was most likely a major transform boundary separating a rifted continental margin to the north from intracratonic rift basins to the south, resolving north-south variations along western Laurentia in the late Neoproterozoic at approximately 650-600 Ma. For Rodinia reconstructions, the conjugate margin to the southern Canadian Cordillera would have a record of rifting between ~730 and 650 Ma followed by passive margin sedimentation.

scholarly journals Overlap assemblages: Laberge Group of the Whitehorse Trough, northern Canadian Cordillera

2021 ◽  
Author(s):  
D A Kellett ◽  
A Zagorevski
Keyword(s):  
Detrital Zircon ◽  
Middle Jurassic ◽  
Depositional Environment ◽  
Thermal Evolution ◽  
Late Triassic ◽  
Canadian Cordillera ◽  
Plutonic Complex ◽  
Time Histories ◽  
Regional Temperature ◽  
Temperature Time

The Laberge Group was deposited during the Early to Middle Jurassic in a marginal marine environment, in the northern Canadian Cordillera. It occurs as a narrow, elongated siliciclastic unit along more than 600 km of strike length, overlapping the Intermontane terranes of southern Yukon and northwestern British Columbia. The Laberge Group was deposited on the Late Triassic Stuhini and Lewes River groups, a volcano-plutonic complex of the Stikine terrane (Stikinia), and, locally, the Kutcho Arc. It is overlain by Middle Jurassic to Cretaceous clastic units. The variations in clast composition and detrital zircon populations among these units indicate major changes in depositional environment, basin extent, and sources during the latest Triassic to Middle Jurassic. Detrital zircon populations are dominated by near contemporary Stuhini-Lewes River arc grains, consistent with dissection of an active arc. Detrital rutile and muscovite data show rapid cooling and exhumation of metamorphic rocks during the Early Jurassic. Thermochronological data indicate that basin thermal evolution was domainal, with at least five regional temperature-time histories.

Detrital zircon geochronology of Upper Proterozoic to lower Paleozoic continental margin strata of the Kootenay Arc: implications for the early Paleozoic tectonic development of the eastern Canadian Cordillera

1991 ◽  
Vol 28 (8) ◽  
pp. 1271-1284 ◽  
Author(s):  
Moira T. Smith ◽  
George E. Gehrels
Keyword(s):  
Detrital Zircon ◽  
Canadian Cordillera ◽  
Zircon Geochronology ◽  
Early Paleozoic ◽  
Lower Paleozoic ◽  
Detrital Zircon Geochronology ◽  
Upper Proterozoic ◽  
Southern Alberta ◽  
Tectonic Development

The Kootenay Arc in northeastern Washington and southeastern British Columbia contains the transition between autochthonous Upper Proterozoic to lower Paleozoic miogeoclinal strata and outboard Paleozoic to Mesozoic eugeoclinal terranes of uncertain paleogeographic affinity. To better understand the nature of this transition, U–Pb detrital zircon geochronologic studies were carried out on Upper Proterozic and lower Paleozoic sedimentary units in the Kootenay Arc, including miogeoclinal strata of the Horsethief Creek and Hamill groups and eugeoclinal strata of the Broadview and Ajax formations (Lardeau Group) and Daisy Formation (Covada Group). The results indicate that all units sampled are derived from source terranes of ~1.7 to 2.7 Ga, with notable populations of 1.76–1.85, 1.9–2.1, and 2.5–2.7 Ga zircons. These results are consistent with derivation of both the miogeoclinal and lower Paleozoic eugeoclinal units from adjacent portions of the southern Alberta craton. This extends the western limit of supracrustal rocks of known North American affinity, formed approximately in situ in the southern Canadian Cordillera, to outboard of the lower Paleozoic eugeoclinal strata in the Kootenay Arc.

Sign in / Sign up

Export Citation Format

Share Document