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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
291

Deformation processes in the Shimanto Subduction Complex, S.W. Japan

Agar, Susan Margaret January 1987 (has links)
Deformation processes in the Shimanto Subduction Complex in the eastern Hata Peninsula, SW Japan have been studied at regional, mesoscopic and microscopic levels. Field mapping has been used in conjunction with a sampling program for optical and electron microscopy, XRD studies-, K-Ar dating and apatite fission track cooling age estimates. These provide a database for interpretations of deformation processes and the tectonic evolution of the Shimanto Subduction Complex. Eocene to Cretaceous broken formations and melanges form approximately 70% of the coastal exposures of the eastern Hata Peninsula. Their disrupted state results from progressive, accretion-related deformation which occurred during sediment burial and lithification. Structural evidence indicates that an early layer-parallel extension was overprinted by layer-parallel shearing as the accreted lithologies were dewatered. Interpretations of deformation mechanism paths during broken formation and melange^ fabric evolution suggest that microstructural processes were controlled by pore-fluid pressures, strain rates and lithologies. Small areas of Miocene to Eocene coherent strata in the complex are interpreted as slope strata which were deformed at slower strain rates than the surrounding broken formations. Early layer-parallel shearing in the broken formations was synchronous with and succeeded by more discrete normal and thrust faulting. As the fault-bound packets of broken strata were backrotated during early thrusting the early fault planes seized up and a new generation of thrust planes was initiated. The later out-of-sequence thrusts shortened the complex internally. Changing physical and chemical conditions during the evolution of fault systems are reflected in the fault rock microstructures. Shortening in the accreted broken formations affected the overlying slope strata where a similar sequence of faulting evolved diachronously. Deformation throughout the area occurred mainly under diagenetic to lower epizone conditions. An early phase of deformation in the late Cretaceous was followed by a second major phase in the late Eocene. The broken formations and melange were uplifted during the middle to late Miocene during the next phase of accretion.
292

Metamorphic evolution of the Leverburgh supracrustal belt, South Harris, with special reference to textural variations

Dickinson, Barbara Bevins January 1974 (has links)
No description available.
293

A textural and isotopic study of Irish base metal mineralisation of Lower Carboniferous age, with specific reference to the Tynagh deposit

Boast, A. M. January 1979 (has links)
No description available.
294

The geology of the area around Gangasvann, Sor Trondelag, Norway

Peacey, Janet Elisabeth Seton January 1961 (has links)
No description available.
295

Geological dispersion of tin in stream sediments and soils in South-West England

Dunlop, Alistair Chisholm January 1973 (has links)
No description available.
296

Anhydrite-carbonate cycles of the Ordovician Baumann Fiord formation, Ellesmere Island, Arctic Canada : a geological history

Mossop, Grant Dilworth January 1973 (has links)
No description available.
297

Design of multichannel nonrecursive digital filters with applications to seismic reflection data

Ozdemir, H. January 1977 (has links)
No description available.
298

The magnetization of seamounts and oceanic islands and movements of the ocean floor

Richardson, A. January 1968 (has links)
No description available.
299

Application regional stream sediment geochemistry in forecasting base metal production, Northern England

Cruzat, Alfredo Camilo Emilio January 1974 (has links)
No description available.
300

Seismic studies of the Precambrian Lewisian metamorphic complex

Al-Haddad, F. M. January 1977 (has links)
No description available.

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