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Structure and shortening of the Kangra and Dehra Dun reentrants, Sub-Himalaya, India

Creator:: Powers, Peter M.
Abstract:: Surface-geology, oil-well, seismic-reflection, and magnetostratigraphic data are integrated to evaluate structural style and shortening rate at the Himalayan front (Sub-Himalaya) of northwest India. The Sub-Himalaya, between the Main Boundary thrust and the Himalayan Frontal fault, is the actively deforming front of the Himalaya. At certain locations, the Himalayan Frontal fault...
Resource Type:: Masters Thesis

Changes in gravity anomalies during erosion and isostatic rebound of collisional mountain ranges

Creator:: Enos, Robert A.
Abstract:: At collisional mountain ranges the tectonic history of crustal shortening and subsequent post-collisional erosion is preserved in the form of the presently observed gravity anomalies. In this study, models of erosion and isostatic rebound at various stages of collision illustrate the evolution of crustal structure, topography, and resulting gravity anomalies....
Resource Type:: Masters Thesis
Full Text:: :_ VRobert J. Lillie At collisional mountain ranges the tectonic history of crustal shortening and

Shear-wave anisotrophy across the Cascadia Subduction Zone from a linear seismograph array

Creator:: Fabritius, R. Axel
Resource Type:: Masters Thesis
Full Text:: , mainly olivine. The general trend of the and öt estimates is most likely due to the absolute plate

Late Cenozoic tectonics of the Yubari Fold and Thrust Belt of central Hokkaido and implications for opening of the Sea of Japan

Creator:: Crenna, Paul A.
Resource Type:: Masters Thesis
Full Text:: least three stages of structural development: (1) late early Miocene to middle Miocene tectonic

I. Direction of maximum horizontal compression in western Oregon determined by borehole breakouts. II. Structure and tectonics of the northern Willamette Valley, Oregon

Creator:: Werner, Kenneth Stefan
Abstract:: Elliptical borehole enlargements or "breakouts" caused by systematic spalling of a borehole wall due to regional maximum horizontal stresses were identified in 18 wells drilled in the Coast Range and Willamette Valley of western Oregon. The breakouts generally indicate a NNW to NNE orientation of maximum horizontal compression (oH[subscript max])...
Resource Type:: Masters Thesis

Structure and metamorphism of the Chakdara area northwest of Swat River, Pakistan

Creator:: Ahmad, Irshad
Resource Type:: Masters Thesis

Plate boundary deformation of the Pacific plate : two case studies

Creator:: Leitner, Beate
Abstract:: Two examples of Pacific rim plate boundary deformation are presented. In the first part of the thesis crustal models are derived for the northwestern part of the Vizcaino block in California using marine seismic and gravity data collected by the Mendocino Triple Junction Seismic Experiment. A northwest-southeast trending kink in...
Resource Type:: Dissertation
Full Text:: ..................................................................................... 10 2.2.3 Plate Tectonic History

Finite difference wavefield modeling of large-aperture data from the 1993 Mendocino Triple Junction Seismic Experiment

Creator:: Lendl, Christof
Abstract:: This thesis presents elastic finite difference simulations of two dimensional wavefield propagation for line-9, recorded during the 1993 part of the multi-institutional, multi-year Mendocino Triple Junction (MTJ) Seismic Experiment. Line-9 is a high-resolution, large-aperture seismic profile oriented in north-south direction, extending from the subduction regime north of the MTJ to...
Resource Type:: Masters Thesis
Full Text:: proposed. The new model introduces several distinct structures, like a subducted Gorda plate, a slabless

Changing tectonic regimes in the southern Salinian block : extension, strike-slip faulting, compression and rotation in the Cuyama Valley, California

Creator:: Ellis, Barbara Jean
Abstract:: During the Cenozoic, tectonics in the Cuyama basin of the southeastern Salinian block changed from extension to strike-slip faulting to compression and rotation. During the Oligocene-early Miocene, the Cuyama basin was adjacent to the southern Mojave region and part of that extensional tectonic regime. Many present-day reverse faults have an...
Resource Type:: Dissertation

Bulldozer blades and colliding submarine mountain chains : constraints on central Oregon convergent margin tectonics from magnetics and gravity

Creator:: Fleming, Sean W.
Abstract:: Magnetic and gravity modelling was completed along two E-W transects offshore central Oregon. These models indicate that the backstop-forming western edge of the Siletz terrane has a seaward dip of approximately 40° to 49° at 44°48'N, shallowing to ~28° at 44°1 1 'N. This is a well-determined result, given available...
Resource Type:: Masters Thesis
Full Text:: of the Siletz terrane may continue to descend at these dips to the JdF plate, but alternate

ScholarsArchive@OSU

Structure and shortening of the Kangra and Dehra Dun reentrants, Sub-Himalaya, India

Changes in gravity anomalies during erosion and isostatic rebound of collisional mountain ranges

Shear-wave anisotrophy across the Cascadia Subduction Zone from a linear seismograph array

Late Cenozoic tectonics of the Yubari Fold and Thrust Belt of central Hokkaido and implications for opening of the Sea of Japan

I. Direction of maximum horizontal compression in western Oregon determined by borehole breakouts. II. Structure and tectonics of the northern Willamette Valley, Oregon

Structure and metamorphism of the Chakdara area northwest of Swat River, Pakistan

Plate boundary deformation of the Pacific plate : two case studies

Finite difference wavefield modeling of large-aperture data from the 1993 Mendocino Triple Junction Seismic Experiment

Changing tectonic regimes in the southern Salinian block : extension, strike-slip faulting, compression and rotation in the Cuyama Valley, California

Bulldozer blades and colliding submarine mountain chains : constraints on central Oregon convergent margin tectonics from magnetics and gravity

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