Upper Jurassic-Lower Cretaceous basinal strata along the Cordilleran margin: implications for the accretionary history of the Alexander- Wrangellia-Peninsular terrane

W. C. McClelland, George E Gehrels, J. B. Saleeby

Research output: Contribution to journalArticle

113 Citations (Scopus)

Abstract

Upper Jurassic and Lower Cretaceous basinal strata are preserved in a discontinuous belt along the inboard margin of the Alexander-Wrangellia-Peninsular terrane (AWP). On the basis of the general similarities between the basinal sequences, it is proposed that they record involvement of the AWP in the Late Jurassic-Early Cretaceous evolution of the Cordilleran margin. A geologically reasonable scenario for the accretion of the AWP includes (1) Middle Jurassic accretion to the Cordilleran margin, (2) Late Jurassic-Early Cretaceous overall northward translation of the AWP and evolution of a series of transtensional basins within a complex dextral strike-slip system along the Cordilleran margin, and (3) mid-Cretaceous structural imbrication of the AWP and inboard terranes that either terminated or resulted in a change in the character of deposition in the marginal basins. -from Authors

Original languageEnglish (US)
Pages (from-to)823-835
Number of pages13
JournalTectonics
Volume11
Issue number4
StatePublished - 1992
Externally publishedYes

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strata
terrane
margins
Jurassic
histories
Cretaceous
history
accretion
imbrication
slip
marginal basin
basin

ASJC Scopus subject areas

  • Geochemistry and Petrology
  • Geophysics

Cite this

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abstract = "Upper Jurassic and Lower Cretaceous basinal strata are preserved in a discontinuous belt along the inboard margin of the Alexander-Wrangellia-Peninsular terrane (AWP). On the basis of the general similarities between the basinal sequences, it is proposed that they record involvement of the AWP in the Late Jurassic-Early Cretaceous evolution of the Cordilleran margin. A geologically reasonable scenario for the accretion of the AWP includes (1) Middle Jurassic accretion to the Cordilleran margin, (2) Late Jurassic-Early Cretaceous overall northward translation of the AWP and evolution of a series of transtensional basins within a complex dextral strike-slip system along the Cordilleran margin, and (3) mid-Cretaceous structural imbrication of the AWP and inboard terranes that either terminated or resulted in a change in the character of deposition in the marginal basins. -from Authors",
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AU - McClelland, W. C.

AU - Gehrels, George E

AU - Saleeby, J. B.

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