Late Cenozoic Stratigraphy of the Southern Terror Rift, Antactica: Implications for Tectonic and Climatic Evolution
This thesis presents an integrated analysis of late Cenozoic (last 14 Ma) glacimarine stratigraphy within the Terror Rift in southern McMurdo Sound, Antarctica. The study area is located in the Windless Bight region of the McMurdo Ice Shelf (NW corner of the Ross Ice Shelf), which overlies a 600 to...
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ftvictoriauwfig:oai:figshare.com:article/16967290 2023-05-15T13:35:14+02:00 Late Cenozoic Stratigraphy of the Southern Terror Rift, Antactica: Implications for Tectonic and Climatic Evolution Hansaraj, Dhiresh 2008-01-01T00:00:00Z https://doi.org/10.26686/wgtn.16967290.v1 https://figshare.com/articles/thesis/Late_Cenozoic_Stratigraphy_of_the_Southern_Terror_Rift_Antactica_Implications_for_Tectonic_and_Climatic_Evolution/16967290 unknown doi:10.26686/wgtn.16967290.v1 https://figshare.com/articles/thesis/Late_Cenozoic_Stratigraphy_of_the_Southern_Terror_Rift_Antactica_Implications_for_Tectonic_and_Climatic_Evolution/16967290 Author Retains Copyright Earth Sciences not elsewhere classified Antarctica MIS ANDRILL School: School of Geography Environment and Earth Sciences 049999 Earth Sciences not elsewhere classified Marsden: 260108 Geotectonics Marsden: 260111 Other Stratigraphy (incl. Sequence Sstratigraphy) Marsden: 260299 Geophysics n.e.c Degree Discipline: Geophysics Degree Level: Masters Degree Name: Master of Science Text Thesis 2008 ftvictoriauwfig https://doi.org/10.26686/wgtn.16967290.v1 2021-11-11T00:03:59Z This thesis presents an integrated analysis of late Cenozoic (last 14 Ma) glacimarine stratigraphy within the Terror Rift in southern McMurdo Sound, Antarctica. The study area is located in the Windless Bight region of the McMurdo Ice Shelf (NW corner of the Ross Ice Shelf), which overlies a 600 to 1000 m-deep bathymetric moat surrounding Ross Island in the depocentral axis of the Victoria Land Basin (VLB). The VLB, one of a number of extensional sedimentary basins within the West Antarctic Rift System, comprises a 7-km-thick succession of syn- and post-rift glacimarine sediments that accumulated during the Oligocene and Miocene periods, respectively. Renewed rifting, known as the Terror Rift, in the centre of the VLB began between 17 to 14 Ma and has accommodated as much as one third of the entire Cenozoic basin-fill. The development of rift-related alkalic volcanoes associated with the Erebus Volcanic Province from c. 5 Ma has produced localised flexural basins/moats around Ross Island that have preserved a thick Pliocene-Pleistocene stratigraphic record. A new stratigraphic architecture is presented for southern Terror Rift based on: (1) the acquisition, processing and interpretation of 73 kilometres of over-ice shelf multi-channel seismic reflection data; (2) correlation of seismic stratigraphy with the integrated chrono-, litho- and cyclostratigraphy of the 1285 m-deep ANDRILL McMurdo Ice Shelf (MIS) Project drill core (AND-1B) using a synthetic seismic-well tie, and time-depth data from a vertical seismic profile (VSP). Five seismic units bounded by regionally-mappable unconformities, which thicken into the centre of the basin, are identified and their relationship to the existing seismic stratigraphy of western VLB (Fielding et al. 2007) is established. In addition, a further 17 mappable seismic surfaces bounding higher-frequency depositional units are identified. The seismic units are interpreted on the basis of characteristic features, seismic facies, and correlations with the lithostratigraphy of the ... Thesis Antarc* Antarctic Antarctica Ice Shelf McMurdo Ice Shelf McMurdo Sound Ross Ice Shelf Ross Island Victoria Land Open Access Victoria University of Wellington / Te Herenga Waka Antarctic Victoria Land McMurdo Sound Ross Island Ross Ice Shelf McMurdo Ice Shelf ENVELOPE(166.500,166.500,-78.000,-78.000) Marsden ENVELOPE(66.067,66.067,-67.867,-67.867) Windless Bight ENVELOPE(167.667,167.667,-77.700,-77.700) |
institution |
Open Polar |
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Open Access Victoria University of Wellington / Te Herenga Waka |
op_collection_id |
ftvictoriauwfig |
language |
unknown |
topic |
Earth Sciences not elsewhere classified Antarctica MIS ANDRILL School: School of Geography Environment and Earth Sciences 049999 Earth Sciences not elsewhere classified Marsden: 260108 Geotectonics Marsden: 260111 Other Stratigraphy (incl. Sequence Sstratigraphy) Marsden: 260299 Geophysics n.e.c Degree Discipline: Geophysics Degree Level: Masters Degree Name: Master of Science |
spellingShingle |
Earth Sciences not elsewhere classified Antarctica MIS ANDRILL School: School of Geography Environment and Earth Sciences 049999 Earth Sciences not elsewhere classified Marsden: 260108 Geotectonics Marsden: 260111 Other Stratigraphy (incl. Sequence Sstratigraphy) Marsden: 260299 Geophysics n.e.c Degree Discipline: Geophysics Degree Level: Masters Degree Name: Master of Science Hansaraj, Dhiresh Late Cenozoic Stratigraphy of the Southern Terror Rift, Antactica: Implications for Tectonic and Climatic Evolution |
topic_facet |
Earth Sciences not elsewhere classified Antarctica MIS ANDRILL School: School of Geography Environment and Earth Sciences 049999 Earth Sciences not elsewhere classified Marsden: 260108 Geotectonics Marsden: 260111 Other Stratigraphy (incl. Sequence Sstratigraphy) Marsden: 260299 Geophysics n.e.c Degree Discipline: Geophysics Degree Level: Masters Degree Name: Master of Science |
description |
This thesis presents an integrated analysis of late Cenozoic (last 14 Ma) glacimarine stratigraphy within the Terror Rift in southern McMurdo Sound, Antarctica. The study area is located in the Windless Bight region of the McMurdo Ice Shelf (NW corner of the Ross Ice Shelf), which overlies a 600 to 1000 m-deep bathymetric moat surrounding Ross Island in the depocentral axis of the Victoria Land Basin (VLB). The VLB, one of a number of extensional sedimentary basins within the West Antarctic Rift System, comprises a 7-km-thick succession of syn- and post-rift glacimarine sediments that accumulated during the Oligocene and Miocene periods, respectively. Renewed rifting, known as the Terror Rift, in the centre of the VLB began between 17 to 14 Ma and has accommodated as much as one third of the entire Cenozoic basin-fill. The development of rift-related alkalic volcanoes associated with the Erebus Volcanic Province from c. 5 Ma has produced localised flexural basins/moats around Ross Island that have preserved a thick Pliocene-Pleistocene stratigraphic record. A new stratigraphic architecture is presented for southern Terror Rift based on: (1) the acquisition, processing and interpretation of 73 kilometres of over-ice shelf multi-channel seismic reflection data; (2) correlation of seismic stratigraphy with the integrated chrono-, litho- and cyclostratigraphy of the 1285 m-deep ANDRILL McMurdo Ice Shelf (MIS) Project drill core (AND-1B) using a synthetic seismic-well tie, and time-depth data from a vertical seismic profile (VSP). Five seismic units bounded by regionally-mappable unconformities, which thicken into the centre of the basin, are identified and their relationship to the existing seismic stratigraphy of western VLB (Fielding et al. 2007) is established. In addition, a further 17 mappable seismic surfaces bounding higher-frequency depositional units are identified. The seismic units are interpreted on the basis of characteristic features, seismic facies, and correlations with the lithostratigraphy of the ... |
format |
Thesis |
author |
Hansaraj, Dhiresh |
author_facet |
Hansaraj, Dhiresh |
author_sort |
Hansaraj, Dhiresh |
title |
Late Cenozoic Stratigraphy of the Southern Terror Rift, Antactica: Implications for Tectonic and Climatic Evolution |
title_short |
Late Cenozoic Stratigraphy of the Southern Terror Rift, Antactica: Implications for Tectonic and Climatic Evolution |
title_full |
Late Cenozoic Stratigraphy of the Southern Terror Rift, Antactica: Implications for Tectonic and Climatic Evolution |
title_fullStr |
Late Cenozoic Stratigraphy of the Southern Terror Rift, Antactica: Implications for Tectonic and Climatic Evolution |
title_full_unstemmed |
Late Cenozoic Stratigraphy of the Southern Terror Rift, Antactica: Implications for Tectonic and Climatic Evolution |
title_sort |
late cenozoic stratigraphy of the southern terror rift, antactica: implications for tectonic and climatic evolution |
publishDate |
2008 |
url |
https://doi.org/10.26686/wgtn.16967290.v1 https://figshare.com/articles/thesis/Late_Cenozoic_Stratigraphy_of_the_Southern_Terror_Rift_Antactica_Implications_for_Tectonic_and_Climatic_Evolution/16967290 |
long_lat |
ENVELOPE(166.500,166.500,-78.000,-78.000) ENVELOPE(66.067,66.067,-67.867,-67.867) ENVELOPE(167.667,167.667,-77.700,-77.700) |
geographic |
Antarctic Victoria Land McMurdo Sound Ross Island Ross Ice Shelf McMurdo Ice Shelf Marsden Windless Bight |
geographic_facet |
Antarctic Victoria Land McMurdo Sound Ross Island Ross Ice Shelf McMurdo Ice Shelf Marsden Windless Bight |
genre |
Antarc* Antarctic Antarctica Ice Shelf McMurdo Ice Shelf McMurdo Sound Ross Ice Shelf Ross Island Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica Ice Shelf McMurdo Ice Shelf McMurdo Sound Ross Ice Shelf Ross Island Victoria Land |
op_relation |
doi:10.26686/wgtn.16967290.v1 https://figshare.com/articles/thesis/Late_Cenozoic_Stratigraphy_of_the_Southern_Terror_Rift_Antactica_Implications_for_Tectonic_and_Climatic_Evolution/16967290 |
op_rights |
Author Retains Copyright |
op_doi |
https://doi.org/10.26686/wgtn.16967290.v1 |
_version_ |
1766063144102264832 |