Tectonic model for the Proterozoic growth of North America

  title={Tectonic model for the Proterozoic growth of North America},
  author={Steven J. Whitmeyer and Karl E. Karlstrom},
This paper presents a plate-scale model for the Precambrian growth and evolution of the North American continent. The core of the North American continent (Canadian shield) came together in the Paleoproterozoic (2.0–1.8 Ga) by plate collisions of Archean continents (Slave with Rae-Hearne, then Rae-Hearne with Superior) as well as smaller Archean continental fragments (Wyoming, Medicine Hat, Sask, Marshfield, Nain cratons). The resulting Trans-Hudson orogen was a collisional belt similar in… Expand
Variable modification of continental lithosphere during the Proterozoic Grenville orogeny: Evidence from teleseismic P-wave tomography
Abstract Cratons, the ancient cores of the continents, have survived thermal and mechanical erosion over multiple Wilson cycles, but the ability of their margins to withstand modification duringExpand
Hydrodynamic mechanism for the Laramide orogeny
The widespread presumption that the Farallon plate subducted along the base of North American lithosphere under most of the western United States and ∼1000 km inboard from the trench has dominatedExpand
Reactivation of the Archean-Proterozoic suture along the southern margin of Laurentia during the Mazatzal orogeny: Petrogenesis and tectonic implications of ca. 1.63 Ga granite in southeastern Wyoming
The presence of ca. 1.63 Ga monzogranite (the “white quartz monzonite”) in the southern Sierra Madre, southeastern Wyoming, is anomalous given its distance from the nearest documented plutons ofExpand
Instability of the southern Canadian Shield during the late Proterozoic
Abstract Cratons are generally considered to comprise lithosphere that has remained tectonically quiescent for billions of years. Direct evidence for stability is mainly founded in the PhanerozoicExpand
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The reconstruction of the paleocontinental configuration involving ancestral North America (Laurentia) at the Paleoproterozoic–Mesoproterozoic boundary has been developed in the last 30 years withExpand
Distributed crustal shortening followed by transpressional shearing in the Superior Province, northeastern Canada: A Late Archean analogy to modern accretionary plate margins?
Abstract The Canadian Superior Province has become one of the key test pieces to discuss tectonic processes and mechanisms of crustal growth in the Late Archean. The Province consists of a >2.8 GaExpand
A tale of two orogens : crustal processes in the Proterozoic Trans-Hudson and Grenville Orogens, eastern Canada
The Precambrian core of North America was assembled in the Proterozoic by a series of collisions between Archean cratons. Among the orogenic belts, two stand out due to their significant spatialExpand
The pre-Mesozoic metamorphic basement of Mexico, 1.5 billion years of crustal evolution
Abstract The pre-Mesozoic metamorphic geology of Mexico is summarized in this review through the integral analysis of 11 deep orogenic systems composed altogether of more than 20 individualExpand
Modification of continental lithosphere by tectonic processes: A tomographic image of central North America
The assembly of Laurentia by Precambrian accretion is also believed to have formed the underlying lithosphere. Accretionary signatures are detectable by seismic observations but subject toExpand
Late Paleoproterozoic terrane accretion in northwestern Canada and the case for circum-Columbian orogenesis
a b s t r a c t The reconstruction of the paleocontinental configuration involving ancestral North America (Laurentia) at the Paleoproterozoic-Mesoproterozoic boundary has been developed in the lastExpand


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The Colorado province is a major component of a >1000-km-wide belt of Paleoproterozoic ocean-arc rocks that occupies the southwestern United States. Known as the Transcontinental ProterozoicExpand
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Northeast-striking tectonic provinces and boundaries were established during 1.8–1.6-Ga assembly of juvenile continental lithosphere in the southwestern United States. This continental grainExpand
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A seismic reflection profile crossing the Jemez lineament in north-central New Mexico images oppositely dipping zones of reflections that converge in the deep crust. We interpret these data as aExpand
Evolution of Precambrian continental lithosphere in Western Canada: results from Lithoprobe studies in Alberta and beyond
The Precambrian lithosphere of western Canada was assembled into the present crustal configuration between ca. 2.0–1.78 Ga by plate collisions, sometimes accompanied by arc magmatism, with subsequentExpand
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Defining the extent and age of basement provinces west of the exposed western margin of the Archean Wyoming craton has been elusive because of thick sedimentary cover and voluminousExpand
Tectonic evolution of Proterozoic Australia
Proterozoic Australia has long been interpreted as a single intact continent in which all tectonic and magmatic activity was intracratonic. This paper proposes an alternative hypothesis in whichExpand
Early Proterozoic Assembly of Tectonostratigraphic Terranes in Southwestern North America
A 500 km wide early Proterozoic orogenic belt in Arizona and adjacent areas is divided into lithotectonic blocks by northeast- and north-trending shear zones. Structural and U-Pb zircon studiesExpand
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A major early Proterozoic orogen (Central Plains) more than 1000 km long and at least 500 km wide has been delineated in the subsurface of Nebraska, Kansas, and Missouri as a result of a newExpand
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— Exposures of Proterozoic crystalline rocks in the southwestern United States record the accretion of juvenile crust to the Archean/ earliest Paleoproterozoic craton province alongExpand
Paleoproterozoic crust within the Great Falls tectonic zone: Implications for the assembly of southern Laurentia
The Great Falls tectonic zone and the Vulcan structure both have been proposed as the site of a Paleoproterozoic suture between the Archean Hearne and Wyoming provinces. Both hypotheses remain viableExpand