New evidence for Cretaceous strike-slip faulting in the United States Cordillera and implications for terrane-displacement, deformation patterns, and plutonism

Clicks: 3
ID: 293966
2001
Free PDF
Article Quality & Performance Metrics
Overall Quality
Not rated
Combines reader engagement with the AI quality analysis. This article has not been analysed, so there is no overall score — reader engagement is measured and shown alongside.
AI Quality Assessment
Not analyzed
Readership in this journal
Steady

Ranked #2,551 of 8,486 articles by views in american journal of science

Most read Least read

Bar heights use a square-root scale. Only the 120 most-read articles are drawn; the journal has 8,486 in total.

Mint this article as an NFT
Not yet minted

Create a permanent, verifiable on-chain record of this article on the Scimatic Network. The NFT is held in your Journament account, and you can withdraw it to your own wallet at any time.

5 SUSD one-off · no wallet required
Sign in to mint
Abstract
Early to mid-Cretaceous dextral strike-slip faulting, involving up to 400 km displacement, has been documented in the southern Sierra Nevada of California.In western Idaho, the Salmon River suture juxtaposes unrelated oceanic and continental rocks along a major, near-vertical shear zone that was active in the Early to mid-Cretaceous. These two structural zones have been treated as separate entities; however, new data indicate that they likely connect via a structural discontinuity in northwest Nevada and southeast Oregon, herein called the western Nevada shear zone (WNS). Current structures within the WNS record dip-slip contractional deformation; however, regional relations (structural and stratigraphic) indicate a mismatch in the early Mesozoic geology of rocks across the WNS that is best explained by dextral strike-slip displacement of several 100 km. These relations argue that an early strike-slip structure along the WNS was reactivated and obscured during later regional shortening deformation, most likely related to the Cretaceous Sevier orogeny. The WNS is along strike and broadly coeval with the Salmon River suture zone and strike-slip boundaries in the Sierra Nevada. We hypothesize that all these features are related elements of a major structural boundary in the western United States Cordillera. This boundary is interpreted to have accommodated significant dextral strike-slip displacement of outboard arc terranes of the Cordillera in the Early Cretaceous, followed by reactivation as a localized contractional zone in the mid-Cretaceous during the Sevier orogeny. Cretaceous batholiths of the United States Cordillera closely parallel the boundary, which we suggest formed a major crustal flaw that localized and facilitated emplacement of arc magmas.
Reference Key
openalex_W2106311459 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Sandra J. Wyld
Journal american journal of science
Year 2001
DOI
10.2475/ajs.301.2.150
URL
https://doi.org/10.2475/ajs.301.2.150
Keywords Keywords not found

Citations

No citations found. To add a citation, contact the admin at info@scimatic.org

Comments

No comments yet. Be the first to comment on this article.