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Recent Articles in Tectonics and Structure

Tectonic Shifts: Haiti Since The Earthquake, Toni Pressley-Sanon University of Massachusetts - Amherst

Tectonic Shifts: Haiti Since The Earthquake, Toni Pressley-Sanon

African Diaspora Archaeology Newsletter

There have been several publications about Haiti since the earthquake devastated the tiny island nation in January 2010. Many of them, especially those that have come from people who have a long history with Haiti, have been collaborations as the authors/editors have culled from the Haitian cultural tradition of the kombit as a way of conceptualizing and framing their projects. Mark Schuller and Pablo Morales’ co-edited volume, Tectonic Shifts: Haiti Since the Earthquake (2012), is one of the latest incarnations of this trend. The text gathers together a diverse group of scholars and grassroots activists to create a comprehensive ...

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Geologic Setting Of The Upper Nehalem Watershed Framework For Geomorphic Analysis And Habitat Assessment, Cristina Francisco Western Oregon University

Geologic Setting Of The Upper Nehalem Watershed Framework For Geomorphic Analysis And Habitat Assessment, Cristina Francisco

Academic Excellence Showcase

The geologic setting of the Nehalem watershed is strongly influenced by the active tectonic associated with the Cascadia Subduction Zone and Oregon Coast Range. Bedrock stratigraphy includes several formations ranging in age from Eocene up to middle Miocene, in addition to Quaternary terrace gravel and alluvium. Topographic lineaments in the Nehalem basin are associated with known fold structures, faults, formation contacts and/or resistant strata. Surficial geology is characterized by parent rock and soils formed through volcanic and depositional processes.

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Structural Analysis And 3d Kinematic Restoration Of The Southern Sudbury Basin, Ontario., Iris Lenauer McMaster University

Structural Analysis And 3d Kinematic Restoration Of The Southern Sudbury Basin, Ontario., Iris Lenauer

Open Access Dissertations and Theses

This thesis addresses the spatial distribution of structures and deformation geometry in the southern Sudbury Basin, Ontario, a synclinal fold basin. Major components are low-temperature fabric development in the Sudbury Igneous Complex (SIC), the relation between fabrics and fold structures in Huronian rocks, and kinematic modeling of deformation of the southern Sudbury Basin. These topics lead to a synthetic model of the structural history of the SIC and its host rocks. Analysis of structures in the Norite layer of the SIC shows that this unit deformed under a single deformation regime and variable rheological conditions. This is evident by foliation ...

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Deformation In Fossil And Active Convergent Tectonic Regions: Examples From Sudbury, Ontario, And Rhodes, Greece, Martin D. Clark McMaster University

Deformation In Fossil And Active Convergent Tectonic Regions: Examples From Sudbury, Ontario, And Rhodes, Greece, Martin D. Clark

Open Access Dissertations and Theses

The kinematics and associated deformation of upper crust in fossil and active convergent tectonic settings require different methods of study. In this thesis, I analyzed an example of a fossil convergent setting, the formation of the eastern portion of Paleoproterozoic Sudbury Basin, Ontario, and an example of an active convergent plate interface represented by the ongoing subduction along the Hellenic Arc at Rhodes, Greece. In Sudbury, using paleomagnetic remanence directions and Matachewan dyke orientations, I constrain the magnitudes of rotation associated with the formation of the NE-lobe, a tight secondary fold of the Sudbury Basin, as well as localize the ...

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Deep Crustal Evolution Of The Western Churchill Province, Nunavut, Canada: Isotopic (U-Pb, O), Trace Element And Micro-Structural Analysis Of Zircon From Lower Crustal Xenoliths, Duane C. Petts Western University

Deep Crustal Evolution Of The Western Churchill Province, Nunavut, Canada: Isotopic (U-Pb, O), Trace Element And Micro-Structural Analysis Of Zircon From Lower Crustal Xenoliths, Duane C. Petts

Electronic Thesis and Dissertation Repository

Zircon from lower crustal xenoliths can preserve unique crustal formation records of unexplored levels of the lithosphere. The first such records for the western Churchill province (Nunavut, Canada) are presented here. Zircon SIMS U-Pb geochronology and oxygen isotope analysis were conducted on kimberlite-hosted granulite-facies xenoliths: four metabasites (#9864; #9865; #9866; #9870) from the Rankin Inlet region, and five metabasites (#10162; #10163; #10167; #10169; #10179) and three metatonalite/anorthosites (#10158; #10164; #10168) from the Repulse Bay region. For the Rankin Inlet suite, oscillatory planar zoned, igneous cores from metabolite xenolith #9865 record dates between ca. 2.9–2.6 Ga, whereas ...

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Determining Ancient Movement Of The Sur–Nacimiento Fault Zone Using Detrital Zircon Geochronology, Jennifer Per Lee California Polytechnic State University

Determining Ancient Movement Of The Sur–Nacimiento Fault Zone Using Detrital Zircon Geochronology, Jennifer Per Lee

Natural Resources Management and Environmental Sciences

Middle Cretaceous movement along the Sur–Nacimiento Fault has implications for our understanding of how convergent tectonic margins evolve and for the architecture of forearc basins. Traditional explanations suggest an autochthonous California Mesozoic Forearc that underwent sinistral or thrust displacement; although recent research suggests either an allochthonous forearc or an isolated Nacimiento Block that experienced significant dextral displacement. Detrital zircons obtained from the Great Valley Group within the Nacimiento block provide age distribution patterns that can help identify sources of sediment deposition and therefore the past location of the Nacimiento block. Using U-Pb detrital zircon geochronology, we have discovered a ...

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Popular Authors

Caroline Burberry University of Nebraska - Lincoln

John Cosgrove University of Nebraska - Lincoln

Amy Smiecinski University of Nevada, Las Vegas

John Anderson University of Nevada, Las Vegas

Ken Smith University of Nevada, Las Vegas

Susanne Janecke Utah State University

David Seggern University of Nevada, Las Vegas

David Seggern University of Nevada, Las Vegas

Martin Clark McMaster University

Peter Dao McMaster University

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Popular Articles

Yellowstone Super-Volcano: Evalutaion, Potential Threats, And Possible Effects On Nebraska Citizens Health And Prosperity

A Study Of Fold Characteristics And Deformation Style Using The Evolution Of The Land Surface: Zagros Simply Folded Belt, Iran, Caroline Burberry, John Cosgrove

Magmatic Enclaves And Evidence For Magma Mixing In The Oak Point Granite, Deer Isle, Maine, Usa

Marine Geophysical And Geomorphic Survey Of Submerged Bronze Age Shorelines And Anchorage Sites At Kalamianos (Korphos, Greece), Peter Dao

Deformation In Fossil And Active Convergent Tectonic Regions: Examples From Sudbury, Ontario, And Rhodes, Greece, Martin Clark

Geometry,Mechanisms, And Significance Of Extensional Folds From Examples In The Rockymountain Basin And Range Province, Susanne Janecke

Seismicity In The Vicinity Of Yucca Mountain, Nevada, For The Period October 1, 2003, To September 30, 2004, Amy Smiecinski, Ken Smith, David Seggern, John Anderson, David Seggern

Applicability Of The Eshelby Formalism To Viscous Power-Law Materials: A Numerical Validation, Zhenyu Zhong

Seismicity In The Vicinity Of Yucca Mountain, Nevada, For The Period October 1, 2002 To September 30, 2003, Amy Smiecinski, Ken Smith, David Seggern, John Anderson, David Seggern

Geology And Ore Deposits Of The Johnnie District, Nye County, Nevada

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