| Author | Tung, Hisu Ming |
| Call Number | AIT Thesis no.GT-84-39 |
| Subject(s) | Marine geophysics
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | With careful field and interpretational techniques, high resolution seismic reflection methods can be effectively applied to the examination of geological features at water-covered sites. The method enables the geometry, structure and configuration of the geological strata to be determined. Several types of equipment may be used in high resolution seismic reflection. There are many geological aspects of the seabed and substrata, which are significant to offshore engineering studies. These features are varied and include open and buried channels, active shallow faults, gas charged sediments, active sand wave fields, pockmarks, coral reefs, and rapid and unpredictable changes in soil properties. Some of these features merely represent a nuisance factor, others are an unquantified hazard factor. An offshore engineering structure is to be constructed on the South-western Taiwan. Features of seabed and substrata particularly that may produce offshore hazards were studied using the high resolution seismic profiling method. A bathymetric map was made since the depth of water is a fundamental consideration in offshore development and directly affects both the cost of development and the engineering techniques to be used. An erosion surface below Tainan Formation has also been traced, and an isopach map of unconsolidated sediments to the erosion surface was produced as it is significant to the engineering foundation design. The seismic data also indicate that Taiwan is locally undergoing a period of marine regression. A number of significant features were delineated including buried river channels, gas charged sediments, gas seeps, buried coral reefs, pockmarks, offshore bars, seafloor sand waves, seafloor depression. Assessment of the potential development hazards in the area was also made. Finally several coring locations based on the seismic data were recommended to increase the reliability and usefulness of the study data. The procedures developed in this study will be useful for further offshore investigation around Taiwan. |
| Year | 1985 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Whiteley, R.J. ;Prinya. Nutalaya |
| Examination Committee(s) | Balasubramaniam, A.S. ;Rantucci, Giovanni |
| Scholarship Donor(s) | Carl Duisbert Gesellschaft, Germany |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1985 |