Controls on the Sedimentology and Paleoenvironmental Evolution of the Permian and Triassic of the Sydney Basin, New South Wales, Australia
The Sydney Basin covers an area of approximately 52000 km2 and is located around the city of Sydney in New South Wales, Australia. About 70% of the basin is onshore and the rest underlies the narrow continental shelf offshore. The Permian and Triassic strata that fill the basin provide an ideal oppo...
Main Author: | |
---|---|
Other Authors: | , , |
Format: | Thesis |
Language: | English |
Published: |
2021
|
Subjects: | |
Online Access: | https://hdl.handle.net/2440/135923 |
id |
ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/135923 |
---|---|
record_format |
openpolar |
spelling |
ftunivadelaidedl:oai:digital.library.adelaide.edu.au:2440/135923 2023-05-15T18:18:17+02:00 Controls on the Sedimentology and Paleoenvironmental Evolution of the Permian and Triassic of the Sydney Basin, New South Wales, Australia Yu, Chen McCabe, Peter Amos, Kathryn Australian School of Petroleum and Energy Resources (ASPER) 2021 application/pdf https://hdl.handle.net/2440/135923 en eng https://hdl.handle.net/2440/135923 Permian Triassic Sydney Basin Sequence stratigraphy Basin analysis Palaeogeography Thesis 2021 ftunivadelaidedl 2023-02-06T06:52:25Z The Sydney Basin covers an area of approximately 52000 km2 and is located around the city of Sydney in New South Wales, Australia. About 70% of the basin is onshore and the rest underlies the narrow continental shelf offshore. The Permian and Triassic strata that fill the basin provide an ideal opportunity to better understand the interplay of various allogenic controls during deposition of coastal to shallow marine strata. The early-middle Permian strata were deposited during a rift-sag phase whereas the later Permian and Triassic strata accumulated in a foreland basin related to the New England Fold Belt. During deposition of the strata, the world experienced a major transformation from icehouse conditions in the early Permian to greenhouse conditions in the Early Triassic. Observations and interpretations, based on a study of outcrops, well logs and cores, were made to provide new insights on the evolution of depositional systems, changes in climatic regimes, and the role of tectonism during evolution of the Sydney Basin. To this end, a series of regional cross-sections and paleogeographic maps were prepared. There is abundant evidence of cold climate conditions in the early Permian (Cisuralian) strata of the Sydney Basin. The basal formation in the southern part of the basin, the Wasp Head Formation, has abundant evidence of glacial activity including facies interpreted as tillites and glacial outwash. Large en echelon blocks are interpreted as glaciotectonic push moraines. Dropstones and glendonites are common in the Cisuralian sediments indicating cold marine waters with floating ice. Small ice-keel scours seen within shallow marine sediments also indicate the presence of at least seasonal floating sea ice. The abundance of dropstones appears to be more a function of sedimentation rates (more dropstones in sediments that accumulated slowly) than a function of the variations in floating sea ice over time. Most of the Cisuralian strata consist of shoreface-offshore facies with some estuarine deposits. The ... Thesis Sea ice The University of Adelaide: Digital Library |
institution |
Open Polar |
collection |
The University of Adelaide: Digital Library |
op_collection_id |
ftunivadelaidedl |
language |
English |
topic |
Permian Triassic Sydney Basin Sequence stratigraphy Basin analysis Palaeogeography |
spellingShingle |
Permian Triassic Sydney Basin Sequence stratigraphy Basin analysis Palaeogeography Yu, Chen Controls on the Sedimentology and Paleoenvironmental Evolution of the Permian and Triassic of the Sydney Basin, New South Wales, Australia |
topic_facet |
Permian Triassic Sydney Basin Sequence stratigraphy Basin analysis Palaeogeography |
description |
The Sydney Basin covers an area of approximately 52000 km2 and is located around the city of Sydney in New South Wales, Australia. About 70% of the basin is onshore and the rest underlies the narrow continental shelf offshore. The Permian and Triassic strata that fill the basin provide an ideal opportunity to better understand the interplay of various allogenic controls during deposition of coastal to shallow marine strata. The early-middle Permian strata were deposited during a rift-sag phase whereas the later Permian and Triassic strata accumulated in a foreland basin related to the New England Fold Belt. During deposition of the strata, the world experienced a major transformation from icehouse conditions in the early Permian to greenhouse conditions in the Early Triassic. Observations and interpretations, based on a study of outcrops, well logs and cores, were made to provide new insights on the evolution of depositional systems, changes in climatic regimes, and the role of tectonism during evolution of the Sydney Basin. To this end, a series of regional cross-sections and paleogeographic maps were prepared. There is abundant evidence of cold climate conditions in the early Permian (Cisuralian) strata of the Sydney Basin. The basal formation in the southern part of the basin, the Wasp Head Formation, has abundant evidence of glacial activity including facies interpreted as tillites and glacial outwash. Large en echelon blocks are interpreted as glaciotectonic push moraines. Dropstones and glendonites are common in the Cisuralian sediments indicating cold marine waters with floating ice. Small ice-keel scours seen within shallow marine sediments also indicate the presence of at least seasonal floating sea ice. The abundance of dropstones appears to be more a function of sedimentation rates (more dropstones in sediments that accumulated slowly) than a function of the variations in floating sea ice over time. Most of the Cisuralian strata consist of shoreface-offshore facies with some estuarine deposits. The ... |
author2 |
McCabe, Peter Amos, Kathryn Australian School of Petroleum and Energy Resources (ASPER) |
format |
Thesis |
author |
Yu, Chen |
author_facet |
Yu, Chen |
author_sort |
Yu, Chen |
title |
Controls on the Sedimentology and Paleoenvironmental Evolution of the Permian and Triassic of the Sydney Basin, New South Wales, Australia |
title_short |
Controls on the Sedimentology and Paleoenvironmental Evolution of the Permian and Triassic of the Sydney Basin, New South Wales, Australia |
title_full |
Controls on the Sedimentology and Paleoenvironmental Evolution of the Permian and Triassic of the Sydney Basin, New South Wales, Australia |
title_fullStr |
Controls on the Sedimentology and Paleoenvironmental Evolution of the Permian and Triassic of the Sydney Basin, New South Wales, Australia |
title_full_unstemmed |
Controls on the Sedimentology and Paleoenvironmental Evolution of the Permian and Triassic of the Sydney Basin, New South Wales, Australia |
title_sort |
controls on the sedimentology and paleoenvironmental evolution of the permian and triassic of the sydney basin, new south wales, australia |
publishDate |
2021 |
url |
https://hdl.handle.net/2440/135923 |
genre |
Sea ice |
genre_facet |
Sea ice |
op_relation |
https://hdl.handle.net/2440/135923 |
_version_ |
1766194818717843456 |