215 resultados para Rotation structures, Lineations
Resumo:
Light brown sediment with clasts ranging from small to large. The clasts range from angular to sub-rounded. Rotation structures are common, along with grain crushing.
Resumo:
Dark brown sediment with scattered amounts of small clasts and medium clasts as well. Clast shape ranges from sub-angular to sub-rounded. Lineations and water escape structures are abundant in this sample.
Resumo:
Brown sediment with grains ranging from small to medium in size. The sample mainly contains smaller clasts. Clast shape ranges from sub-angular to sub-rounded. Water escape structures and lineations can be seen in this sample. Grains stacking and comet structures are also present in minor amounts.
Resumo:
Dark brown sediment with clasts ranging from small to large. The clasts range from angular to sub-rounded in shape. The sample mainly contains edge-to-edge grain crushing and rotation structures. Many grains are fractured and a few necking structures can also be seen.
Resumo:
This sample contains grains that range from small to large in size. The clast shape ranges from angular to rounded. Many grains are fractured and grain crushing is commonly seen. A few necking structures and rotation structures can also be seen.
Resumo:
This sample contains clasts that range from small to large. A few fractured grains can be seen. The grain shape ranges from angular to rounded. Rotation structures can be seen throughout the sample along with some edge-to-edge grain crushing.
Resumo:
Brown sediment with clasts that range from small to large. The clast shape ranges from angular to sub-rounded. The sample is abundant in necking and rotation structures. Minor edge-to-edge grain crushing can also be seen.
Resumo:
Brown sediment with clasts ranging from small to medium in size. Grain shape ranges from angular to sub-rounded. Water escape structures and lineations are abundant throughout the sample. Some comet structures can also be seen. There were minor amounts of grain crushing also present.
Resumo:
Dark brown sediment with clasts ranging from small to large. The grains are sub-angular. Two main domains can be seen. Both are coarse grained, but one contains larger grains and potentially more clay material. Lineations are present throughout the sample in multiple directions. Minor rotation around a few larger clasts can be seen, as well as comet structures.
Resumo:
Brown sediment with clasts that range from small to large. The clast shape ranges from angular to sub-rounded. Lineations and water escape structures are present. Grain crushing and minor amounts of rotation are also present.
Resumo:
Dark brown sediment with clasts ranging from small to large in size. Clast shape ranges from angular to sub-rounded. Lineations can be seen throughout the sample, along with a few rotation and comet structures. This sample also contains a fine grained clay domain that is relatively structure-less. It can be seen scattered throughout the sample.
Resumo:
The Paint Lake Deformation Zone (PLDZ), located within the Superior Province of Canada, demarcates a major structural and lithological break between the Onaman-Tashota Terrane to the north and the Beardmore-Geraldton Belt to the south. The PLDZ is an east-west trending lineament, approximately 50 km in length and up to 1 km in width, comprised of an early ductile component termed the Paint Lake Shear Zone and a late brittle component known as the Paint Lake Fault. Structures associated with PLDZ development including S-, C- and C'-fabrics, stretching lineations, slickensides, C-C' intersection lineations, Z-folds and kinkbands indicate that simple shear deformation dominated during a NW-SE compressional event. Movement along the PLDZ was in a dextral sense consisting of an early differential motion with southside- down and a later strike-slip motion. Although the locus of the PLDZ may in part be lithologically controlled, mylonitization which accompanied shear zone development is not dependent on the lithological type. Conglomerate, intermediate and mafic volcanic units exhibit similar mesoscopic and microscopic structures where transected by the PLDZ. Field mapping, supported by thin section analysis, defines five strain domains increasing in intensity of deformation from shear zone boundary to centre. A change in the dominant microstructural deformation mechanism from dislocation creep to diffusion creep is observed with increasing strain during mylonitization. C'-fabric development is temporally associated with this change. A decrease in the angular relationship between C- and C'-fabrics is observed upon attaining maximum strain intensity. Strain profiling of the PLDZ demonstrates the presence of an outer primary strain gradient which exhibits a simple profile and an inner secondary strain gradient which exhibits a more complex profile. Regionally metamorphosed lithologies of lower greenschist facies outside the PLDZ were subjected to retrograde metamorphism during deformation within the PLDZ.
Resumo:
The nature of this research is to investigate paleoseismic deformation of glacial soft sediments from three sampling sites throughout the Scottish Highlands; Arrat's Mills, Meikleour and Glen Roy. The paleoseismic evidence investigated in this research will provide a basis for applying criteria to soft sediment deformation structures, and the trigger mechanisms that create these structures. Micromorphology is the tool used in this to investigate paleoseismic deformation structures in thin section. Thin section analysis, (micromorphology) of glacial sediments from the three sampling sites is used to determine microscale evidence of past earthquakes that can be correlated to modem-day events and possibly lead to a better understanding of the impact of earthquakes throughout a range of sediment types. The significance of the three sampling locations is their proximity to two major active fault zones that cross Scotland. The fault zones are the Highland Boundary Fault and the Great Glen Fault, these two major faults that parallel each other and divide the country in half Sims (1975) used a set of seven criteria that identified soft sediment deformation structures created by a magnitude six earthquake in Cahfomia. Using criteria set forth by Sims (1975), the paleoseismic evidence can be correlated to the magnitude of the deformation structures found in the glacial sediments. This research determined that the microstructures at Arrat's Mill, Meikleour and Glen Roy are consistent with a seismically induced origin. It has also been demonstrated that, even without the presence of macrostructures, the use of micromorphology techniques in detecting such activity within sediments is of immense value.
Resumo:
An energy theory is formulated for the rotational energy levels in a p-complex Rydberg state of an asymmetric top molecule of symmetry C2v. The effective Hamiltonian used consists of the usual rigid rotor Hamiltonian augmented with terms representing electronic spin and orbital angular momentum effects. Criteria for assigning symmetry species to the rotational energy levels, following Houganfs scheme that uses the full molecular group,are established and given in the form of a table. This is particularly suitable when eigenvectors are calculated on a digital computer. Also, an intensity theory for transitions to the Rydberg p-complex singlet states is presented and selection rules in terms of symmetry species of energy states are established. Finally, applications to HpO and DpO are given.
Resumo:
This thesis can be broken down into two sections. Section one is a study . of the ionization mechanisms and the ion source optimization for Fast Atom Bombardment (FAB) ionization. For this study, several specially designed probe tips were created and tested under various experimental conditions. The aIm of this section is to understand the operating characteristics of a FAB IOn source better. The second section involves the study of several Vitamin B6 Schiff Base complexes using both positive and negative ion FAB MS. This section is an exploration of the usefulness of FAB MS as a structure probe for the metalcoordination complexes of Vitamin B6.