A three-sided orogen

A new tectonic model for Ancestral Rocky Mountain uplift and basin development

Ryan J. Leary, Paul J Umhoefer, M. Elliot Smith, Nancy R Riggs

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The tectonic origin of the Pennsylvanian-Permian Ancestral Rocky Mountain system is debated. Most models invoke stress from collision along the Ouachita-Marathon belt as the primary driver for Ancestral Rocky Mountain (ARM) (western USA) tectonism, but no existing model has convincingly explained the timing, northeastsouthwest contractional kinematics, and amagmatic nature of this system. We propose that stress generated by transpressional deformation along the southwestern (Sonora) margin of Laurentia combined with that from collision along the Ouachita-Marathon and Nevada margins drove uplift and basin development of the ARM. This model explains ARM timing, uplift kinematics, and lack of magmatism, and is supported by a new generation of late Paleozoic global plate reconstructions.

Original languageEnglish (US)
Pages (from-to)735-738
Number of pages4
JournalGeology
Volume45
Issue number8
DOIs
StatePublished - Aug 1 2017

Fingerprint

basin evolution
uplift
tectonics
mountain
kinematics
collision
Laurentia
Pennsylvanian
magmatism
Permian
Paleozoic

ASJC Scopus subject areas

  • Geology

Cite this

A three-sided orogen : A new tectonic model for Ancestral Rocky Mountain uplift and basin development. / Leary, Ryan J.; Umhoefer, Paul J; Smith, M. Elliot; Riggs, Nancy R.

In: Geology, Vol. 45, No. 8, 01.08.2017, p. 735-738.

Research output: Contribution to journalArticle

@article{f2078df5520a4e9d849a0680259f63b5,
title = "A three-sided orogen: A new tectonic model for Ancestral Rocky Mountain uplift and basin development",
abstract = "The tectonic origin of the Pennsylvanian-Permian Ancestral Rocky Mountain system is debated. Most models invoke stress from collision along the Ouachita-Marathon belt as the primary driver for Ancestral Rocky Mountain (ARM) (western USA) tectonism, but no existing model has convincingly explained the timing, northeastsouthwest contractional kinematics, and amagmatic nature of this system. We propose that stress generated by transpressional deformation along the southwestern (Sonora) margin of Laurentia combined with that from collision along the Ouachita-Marathon and Nevada margins drove uplift and basin development of the ARM. This model explains ARM timing, uplift kinematics, and lack of magmatism, and is supported by a new generation of late Paleozoic global plate reconstructions.",
author = "Leary, {Ryan J.} and Umhoefer, {Paul J} and Smith, {M. Elliot} and Riggs, {Nancy R}",
year = "2017",
month = "8",
day = "1",
doi = "10.1130/G39041.1",
language = "English (US)",
volume = "45",
pages = "735--738",
journal = "Geology",
issn = "0091-7613",
publisher = "Geological Society of America",
number = "8",

}

TY - JOUR

T1 - A three-sided orogen

T2 - A new tectonic model for Ancestral Rocky Mountain uplift and basin development

AU - Leary, Ryan J.

AU - Umhoefer, Paul J

AU - Smith, M. Elliot

AU - Riggs, Nancy R

PY - 2017/8/1

Y1 - 2017/8/1

N2 - The tectonic origin of the Pennsylvanian-Permian Ancestral Rocky Mountain system is debated. Most models invoke stress from collision along the Ouachita-Marathon belt as the primary driver for Ancestral Rocky Mountain (ARM) (western USA) tectonism, but no existing model has convincingly explained the timing, northeastsouthwest contractional kinematics, and amagmatic nature of this system. We propose that stress generated by transpressional deformation along the southwestern (Sonora) margin of Laurentia combined with that from collision along the Ouachita-Marathon and Nevada margins drove uplift and basin development of the ARM. This model explains ARM timing, uplift kinematics, and lack of magmatism, and is supported by a new generation of late Paleozoic global plate reconstructions.

AB - The tectonic origin of the Pennsylvanian-Permian Ancestral Rocky Mountain system is debated. Most models invoke stress from collision along the Ouachita-Marathon belt as the primary driver for Ancestral Rocky Mountain (ARM) (western USA) tectonism, but no existing model has convincingly explained the timing, northeastsouthwest contractional kinematics, and amagmatic nature of this system. We propose that stress generated by transpressional deformation along the southwestern (Sonora) margin of Laurentia combined with that from collision along the Ouachita-Marathon and Nevada margins drove uplift and basin development of the ARM. This model explains ARM timing, uplift kinematics, and lack of magmatism, and is supported by a new generation of late Paleozoic global plate reconstructions.

UR - http://www.scopus.com/inward/record.url?scp=85026633877&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85026633877&partnerID=8YFLogxK

U2 - 10.1130/G39041.1

DO - 10.1130/G39041.1

M3 - Article

VL - 45

SP - 735

EP - 738

JO - Geology

JF - Geology

SN - 0091-7613

IS - 8

ER -