The pre-Carboniferous geology of Bass Strait and surrounds
This thesis examines the Proterozoic and early Paleozoic connections between Victoria and Tasmania. Many different models have been suggested, and I conclude here that the Selwyn Block model is the most appropriate as it satisfies both the geological and geophysical data. The model proposed that the...
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ftmonashunivfig:oai:figshare.com:article/4719694 2023-05-15T14:01:32+02:00 The pre-Carboniferous geology of Bass Strait and surrounds Moore, David Hugh 2017-03-03T00:42:20Z https://doi.org/10.4225/03/58b8bbef20f16 https://figshare.com/articles/thesis/The_pre-Carboniferous_geology_of_Bass_Strait_and_surrounds/4719694 unknown doi:10.4225/03/58b8bbef20f16 https://figshare.com/articles/thesis/The_pre-Carboniferous_geology_of_Bass_Strait_and_surrounds/4719694 In Copyright monash:169730 ethesis-20160310-085257 Geophysical interpretation thesis(doctorate) Rodinia Victoria 1959.1/1258846 Selwyn Block Gondwana Open access Tasmanides Tasmania 2016 VanDieland Text Thesis 2017 ftmonashunivfig https://doi.org/10.4225/03/58b8bbef20f16 2022-06-06T15:28:03Z This thesis examines the Proterozoic and early Paleozoic connections between Victoria and Tasmania. Many different models have been suggested, and I conclude here that the Selwyn Block model is the most appropriate as it satisfies both the geological and geophysical data. The model proposed that the Proterozoic cratonic crust of western Tasmania continues north under Bass Strait and lies unconformably below the Melbourne Zone in central Victoria. The Selwyn Block is the northern end of the Proterozoic micro-continent, VanDieland, which also includes western Tasmania, the west South Tasman Rise and the East Tasman Plateau. In order to be able to extrapolate the major rock packages in Tasmania across Bass Strait, they first had to be determined in Tasmania. Seven Proterozoic zones were outlined—King Island, Rocky Cape, Burnie, Pedder, Tyennan, Sorell-Badger Head, and Glomar, with an eighth, Eastern Tasmania equivalent to the Paleozoic Tabberabbera Zone in eastern Victoria. Only the first three Proterozoic zones continue across Bass Strait, with the other four truncated either in Bass Strait or lying further south. Outcrops of rocks from the King Island and Burnie Zones are present in windows in Victoria but the Rocky Cape Zone is completely concealed. However, the presence in the mid-crust of the Rocky Cape and King Island zones can be seen in the enclaves and in the geochemical signatures of the Upper Devonian granites of central Victoria and in rare conglomerate clasts. VanDieland was initiated inside Nuna, between Laurentia and East Antarctica, at about 1.8 Ga. Much of the sedimentation seen in the Rocky Cape Zone is the erosional products of the Grenville Orogeny. As Rodinia broke up, VanDieland began to be extended at about 760 Ma, and this continued until final separation from Antarctica at about 570 Ma. After this, it drifted ‘north’ as micro-continental slivers along the Terra Australis margin until about 530 Ma. It then re-amalgamated in a closing back arc system within the greater Ross-Delamerian ... Thesis Antarc* Antarctica East Antarctica Monash University: Figshare East Antarctica King Island ENVELOPE(-58.100,-58.100,-62.000,-62.000) Selwyn ENVELOPE(-138.287,-138.287,62.799,62.799) South Tasman Rise ENVELOPE(148.000,148.000,-47.500,-47.500) Terra Australis ENVELOPE(-62.900,-62.900,-64.900,-64.900) |
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Open Polar |
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Monash University: Figshare |
op_collection_id |
ftmonashunivfig |
language |
unknown |
topic |
monash:169730 ethesis-20160310-085257 Geophysical interpretation thesis(doctorate) Rodinia Victoria 1959.1/1258846 Selwyn Block Gondwana Open access Tasmanides Tasmania 2016 VanDieland |
spellingShingle |
monash:169730 ethesis-20160310-085257 Geophysical interpretation thesis(doctorate) Rodinia Victoria 1959.1/1258846 Selwyn Block Gondwana Open access Tasmanides Tasmania 2016 VanDieland Moore, David Hugh The pre-Carboniferous geology of Bass Strait and surrounds |
topic_facet |
monash:169730 ethesis-20160310-085257 Geophysical interpretation thesis(doctorate) Rodinia Victoria 1959.1/1258846 Selwyn Block Gondwana Open access Tasmanides Tasmania 2016 VanDieland |
description |
This thesis examines the Proterozoic and early Paleozoic connections between Victoria and Tasmania. Many different models have been suggested, and I conclude here that the Selwyn Block model is the most appropriate as it satisfies both the geological and geophysical data. The model proposed that the Proterozoic cratonic crust of western Tasmania continues north under Bass Strait and lies unconformably below the Melbourne Zone in central Victoria. The Selwyn Block is the northern end of the Proterozoic micro-continent, VanDieland, which also includes western Tasmania, the west South Tasman Rise and the East Tasman Plateau. In order to be able to extrapolate the major rock packages in Tasmania across Bass Strait, they first had to be determined in Tasmania. Seven Proterozoic zones were outlined—King Island, Rocky Cape, Burnie, Pedder, Tyennan, Sorell-Badger Head, and Glomar, with an eighth, Eastern Tasmania equivalent to the Paleozoic Tabberabbera Zone in eastern Victoria. Only the first three Proterozoic zones continue across Bass Strait, with the other four truncated either in Bass Strait or lying further south. Outcrops of rocks from the King Island and Burnie Zones are present in windows in Victoria but the Rocky Cape Zone is completely concealed. However, the presence in the mid-crust of the Rocky Cape and King Island zones can be seen in the enclaves and in the geochemical signatures of the Upper Devonian granites of central Victoria and in rare conglomerate clasts. VanDieland was initiated inside Nuna, between Laurentia and East Antarctica, at about 1.8 Ga. Much of the sedimentation seen in the Rocky Cape Zone is the erosional products of the Grenville Orogeny. As Rodinia broke up, VanDieland began to be extended at about 760 Ma, and this continued until final separation from Antarctica at about 570 Ma. After this, it drifted ‘north’ as micro-continental slivers along the Terra Australis margin until about 530 Ma. It then re-amalgamated in a closing back arc system within the greater Ross-Delamerian ... |
format |
Thesis |
author |
Moore, David Hugh |
author_facet |
Moore, David Hugh |
author_sort |
Moore, David Hugh |
title |
The pre-Carboniferous geology of Bass Strait and surrounds |
title_short |
The pre-Carboniferous geology of Bass Strait and surrounds |
title_full |
The pre-Carboniferous geology of Bass Strait and surrounds |
title_fullStr |
The pre-Carboniferous geology of Bass Strait and surrounds |
title_full_unstemmed |
The pre-Carboniferous geology of Bass Strait and surrounds |
title_sort |
pre-carboniferous geology of bass strait and surrounds |
publishDate |
2017 |
url |
https://doi.org/10.4225/03/58b8bbef20f16 https://figshare.com/articles/thesis/The_pre-Carboniferous_geology_of_Bass_Strait_and_surrounds/4719694 |
long_lat |
ENVELOPE(-58.100,-58.100,-62.000,-62.000) ENVELOPE(-138.287,-138.287,62.799,62.799) ENVELOPE(148.000,148.000,-47.500,-47.500) ENVELOPE(-62.900,-62.900,-64.900,-64.900) |
geographic |
East Antarctica King Island Selwyn South Tasman Rise Terra Australis |
geographic_facet |
East Antarctica King Island Selwyn South Tasman Rise Terra Australis |
genre |
Antarc* Antarctica East Antarctica |
genre_facet |
Antarc* Antarctica East Antarctica |
op_relation |
doi:10.4225/03/58b8bbef20f16 https://figshare.com/articles/thesis/The_pre-Carboniferous_geology_of_Bass_Strait_and_surrounds/4719694 |
op_rights |
In Copyright |
op_doi |
https://doi.org/10.4225/03/58b8bbef20f16 |
_version_ |
1766271372199198720 |