Cenozoic evolution of the Campbell Plateau, Subantarctic New Zealand: Insights from sub-bottom profile data
The Campbell Plateau represents ~30% of the submerged continent of Zealandia and represents part of the Gondwana super-continent that began to break-up ~98Ma. The focus of this MSc thesis is to use sub-bottom, profile data collected in 2017 and 2018 from Campbell Plateau to improve our understanding...
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ftsmithonian:oai:figshare.com:article/17148380 2023-05-15T13:37:19+02:00 Cenozoic evolution of the Campbell Plateau, Subantarctic New Zealand: Insights from sub-bottom profile data Cathie, Benjamin (11814242) 2020-01-01T00:00:00Z https://doi.org/10.26686/wgtn.17148380.v1 unknown https://figshare.com/articles/thesis/Cenozoic_evolution_of_the_Campbell_Plateau_Subantarctic_New_Zealand_Insights_from_sub-bottom_profile_data/17148380 doi:10.26686/wgtn.17148380.v1 Author Retains Copyright Marine Geoscience Sedimentology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) Seismology and Seismic Exploration Physical Oceanography Campbell Plateau Cenozoic Sub-bottom profile Oceanography Subanatarctic Southern Ocean Geology School: School of Geography Environment and Earth Sciences 040310 Sedimentology 040305 Marine Geoscience 040311 Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) 040503 Physical Oceanography 040407 Seismology and Seismic Exploration 970104 Expanding Knowledge in the Earth Sciences Degree Discipline: Geology Degree Level: Masters Degree Name: Master of Science Text Thesis 2020 ftsmithonian https://doi.org/10.26686/wgtn.17148380.v1 2021-12-19T19:51:42Z The Campbell Plateau represents ~30% of the submerged continent of Zealandia and represents part of the Gondwana super-continent that began to break-up ~98Ma. The focus of this MSc thesis is to use sub-bottom, profile data collected in 2017 and 2018 from Campbell Plateau to improve our understanding of the Cenozoic evolution of the region. The sub-bottom profiles show a rugged basement overlain by a variety of sedimentary sequences and subsurface features such as volcanoes, onlap, and downlap surfaces as well as multiple unconformities that can be traced throughout the Cenozoic (65Ma). The sub-bottom profiles are compared to 2 drill cores; Ocean Drilling Program (ODP) site 1120 on the eastern side of the plateau and Deep Sea Drilling Program (DSDP) site 277 in the south. These drill cores indicate that the lithology from the Cretaceous onwards is predominantly biogenic calcareous sandstone and mudstone, which changes to nannofossil-rich oozes in the Miocene and foraminiferal oozes and nannofossil oozes dated early to late Pleistocene. The northern plateau appears to be relatively quiescent with thin, relatively uniform strata, only influenced by small reverse faults. Sedimentary deposits such as wedges and contourites are also evident in the central and north-western part of the study area. The southern plateau appears to be have been highly dynamic with onlap/downlap surfaces, interpreted as current scours, and erosional surfaces. There is a plateau-wide unconformity during the Pliocene, as derived from the nannofossils of the ODP1120 drill core, which appears to have been a large-scale erosional event. The Southern Ocean circulation, dominated by Antarctic Circumpolar Current, the Subtropical Front, and local wind-driven currents, are the main drivers of these lithological changes and plateau-wide sedimentological structures. Previous interpretations of the sub-surface structure of the plateau are seen to be invalid in relation to this study, with the sub-surface seen to be relatively undeformed with only minor reverse faulting present. Areas of possible uplifted basement seen near Campbell Island also indicate that the Campbell Plateau has been through substantial erosion and deformation since its’ separation from Gondwana ~98Ma and movement to its modern-day position. Thesis Antarc* Antarctic Southern Ocean Unknown Antarctic Campbell Island ENVELOPE(169.500,169.500,-52.500,-52.500) Campbell Plateau ENVELOPE(171.000,171.000,-50.667,-50.667) New Zealand Southern Ocean |
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ftsmithonian |
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topic |
Marine Geoscience Sedimentology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) Seismology and Seismic Exploration Physical Oceanography Campbell Plateau Cenozoic Sub-bottom profile Oceanography Subanatarctic Southern Ocean Geology School: School of Geography Environment and Earth Sciences 040310 Sedimentology 040305 Marine Geoscience 040311 Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) 040503 Physical Oceanography 040407 Seismology and Seismic Exploration 970104 Expanding Knowledge in the Earth Sciences Degree Discipline: Geology Degree Level: Masters Degree Name: Master of Science |
spellingShingle |
Marine Geoscience Sedimentology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) Seismology and Seismic Exploration Physical Oceanography Campbell Plateau Cenozoic Sub-bottom profile Oceanography Subanatarctic Southern Ocean Geology School: School of Geography Environment and Earth Sciences 040310 Sedimentology 040305 Marine Geoscience 040311 Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) 040503 Physical Oceanography 040407 Seismology and Seismic Exploration 970104 Expanding Knowledge in the Earth Sciences Degree Discipline: Geology Degree Level: Masters Degree Name: Master of Science Cathie, Benjamin (11814242) Cenozoic evolution of the Campbell Plateau, Subantarctic New Zealand: Insights from sub-bottom profile data |
topic_facet |
Marine Geoscience Sedimentology Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) Seismology and Seismic Exploration Physical Oceanography Campbell Plateau Cenozoic Sub-bottom profile Oceanography Subanatarctic Southern Ocean Geology School: School of Geography Environment and Earth Sciences 040310 Sedimentology 040305 Marine Geoscience 040311 Stratigraphy (incl. Biostratigraphy and Sequence Stratigraphy) 040503 Physical Oceanography 040407 Seismology and Seismic Exploration 970104 Expanding Knowledge in the Earth Sciences Degree Discipline: Geology Degree Level: Masters Degree Name: Master of Science |
description |
The Campbell Plateau represents ~30% of the submerged continent of Zealandia and represents part of the Gondwana super-continent that began to break-up ~98Ma. The focus of this MSc thesis is to use sub-bottom, profile data collected in 2017 and 2018 from Campbell Plateau to improve our understanding of the Cenozoic evolution of the region. The sub-bottom profiles show a rugged basement overlain by a variety of sedimentary sequences and subsurface features such as volcanoes, onlap, and downlap surfaces as well as multiple unconformities that can be traced throughout the Cenozoic (65Ma). The sub-bottom profiles are compared to 2 drill cores; Ocean Drilling Program (ODP) site 1120 on the eastern side of the plateau and Deep Sea Drilling Program (DSDP) site 277 in the south. These drill cores indicate that the lithology from the Cretaceous onwards is predominantly biogenic calcareous sandstone and mudstone, which changes to nannofossil-rich oozes in the Miocene and foraminiferal oozes and nannofossil oozes dated early to late Pleistocene. The northern plateau appears to be relatively quiescent with thin, relatively uniform strata, only influenced by small reverse faults. Sedimentary deposits such as wedges and contourites are also evident in the central and north-western part of the study area. The southern plateau appears to be have been highly dynamic with onlap/downlap surfaces, interpreted as current scours, and erosional surfaces. There is a plateau-wide unconformity during the Pliocene, as derived from the nannofossils of the ODP1120 drill core, which appears to have been a large-scale erosional event. The Southern Ocean circulation, dominated by Antarctic Circumpolar Current, the Subtropical Front, and local wind-driven currents, are the main drivers of these lithological changes and plateau-wide sedimentological structures. Previous interpretations of the sub-surface structure of the plateau are seen to be invalid in relation to this study, with the sub-surface seen to be relatively undeformed with only minor reverse faulting present. Areas of possible uplifted basement seen near Campbell Island also indicate that the Campbell Plateau has been through substantial erosion and deformation since its’ separation from Gondwana ~98Ma and movement to its modern-day position. |
format |
Thesis |
author |
Cathie, Benjamin (11814242) |
author_facet |
Cathie, Benjamin (11814242) |
author_sort |
Cathie, Benjamin (11814242) |
title |
Cenozoic evolution of the Campbell Plateau, Subantarctic New Zealand: Insights from sub-bottom profile data |
title_short |
Cenozoic evolution of the Campbell Plateau, Subantarctic New Zealand: Insights from sub-bottom profile data |
title_full |
Cenozoic evolution of the Campbell Plateau, Subantarctic New Zealand: Insights from sub-bottom profile data |
title_fullStr |
Cenozoic evolution of the Campbell Plateau, Subantarctic New Zealand: Insights from sub-bottom profile data |
title_full_unstemmed |
Cenozoic evolution of the Campbell Plateau, Subantarctic New Zealand: Insights from sub-bottom profile data |
title_sort |
cenozoic evolution of the campbell plateau, subantarctic new zealand: insights from sub-bottom profile data |
publishDate |
2020 |
url |
https://doi.org/10.26686/wgtn.17148380.v1 |
long_lat |
ENVELOPE(169.500,169.500,-52.500,-52.500) ENVELOPE(171.000,171.000,-50.667,-50.667) |
geographic |
Antarctic Campbell Island Campbell Plateau New Zealand Southern Ocean |
geographic_facet |
Antarctic Campbell Island Campbell Plateau New Zealand Southern Ocean |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://figshare.com/articles/thesis/Cenozoic_evolution_of_the_Campbell_Plateau_Subantarctic_New_Zealand_Insights_from_sub-bottom_profile_data/17148380 doi:10.26686/wgtn.17148380.v1 |
op_rights |
Author Retains Copyright |
op_doi |
https://doi.org/10.26686/wgtn.17148380.v1 |
_version_ |
1766090281446277120 |