Changing of the guards: Detrital zircon provenance tracking sedimentological reorganization of a post-Gondwanan rift margin
© 2019 The Authors. Basin Research © 2019 John Wiley & Sons Ltd, European Association of Geoscientists & Engineers and International Association of Sedimentologists Understanding the development of sedimentary systems during continental rifting is important for tracking environmental...
| Main Authors: | , |
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| Format: | Journal Article |
| Language: | English |
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WILEY
2019
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/76474 |
| _version_ | 1848763696108535808 |
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| author | Barham, Milo Kirkland, Chris |
| author_facet | Barham, Milo Kirkland, Chris |
| author_sort | Barham, Milo |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2019 The Authors. Basin Research © 2019 John Wiley & Sons Ltd, European Association of Geoscientists & Engineers and International Association of Sedimentologists
Understanding the development of sedimentary systems during continental rifting is important for tracking environmental change and lithospheric processes. Conceptual models have been developed for the sourcing, routing and facies architecture of sediments in rift-settings, driven in part by quantitative sediment tracking. Here, we present laser ablation split-stream detrital zircon U/Pb geochronology and Hf-isotopes for post-rift (Cretaceous-Paleogene) clastic sediments from Ocean Drilling Program (ODP) wells and Plio-Pleistocene palaeoshoreline material, from the southern margin of Australia. Provenance results are contextualized through comparison with well-characterized source regions and regional pre- and syn-rift sediment reservoirs to track changes associated with Australia-Antarctica separation during East Gondwana break-up. The provenance character of the post-rift sediments studied are distinct from pre-existing sediment reservoirs and demonstrate termination of previously stable sediment routing systems and a dominance of local basement of the Proterozoic Madura and Coompana provinces (~1.2 Ga and CHUR-like Hf-signatures; Moodini Supersuite) in offshore ODP wells. A composite post-rift Cretaceous?-Eocene sample in the easternmost well expresses characteristic Phanerozoic zircon age signatures associated with source regions in eastern Australia that are interpreted to reflect inversion in the Ceduna Sub-basin to the east. Detrital zircon signatures in Plio-Pleistocene palaeoshoreline sediment are also relatively distinct, indicating derivation from coastal erosion in the Leeuwin Complex (~0.5 and 0.7 Ga subchondritic grains) and Albany–Fraser Orogen (~1.2 Ga subchondritic grains) several hundred, to over a thousand kilometers to the west. Collectively, results highlight the fundamental geological processes associated with rifting that dramatically change the character of sediment provenance via (a) isolation of pre-existing primary and secondary sources of detritus, (b) development of new source regions in basin compartmentalized highs and localized fault scarps, and (c) establishment of marine and coastal currents that redefine clastic sediment transport. |
| first_indexed | 2025-11-14T11:07:34Z |
| format | Journal Article |
| id | curtin-20.500.11937-76474 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:07:34Z |
| publishDate | 2019 |
| publisher | WILEY |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-764742020-08-24T08:38:48Z Changing of the guards: Detrital zircon provenance tracking sedimentological reorganization of a post-Gondwanan rift margin Barham, Milo Kirkland, Chris Science & Technology Physical Sciences Geosciences, Multidisciplinary Geology Bight Basin Eucla Basin Hf-isotopes Leg 182 long-shore drift Ocean Drilling Program sediment routing U/Pb geochronology GREAT-AUSTRALIAN-BIGHT ALBANY-FRASER OROGEN U-PB HF-ISOTOPE WESTERN-AUSTRALIA TRACE-ELEMENT CONTINENTAL-MARGIN CRUSTAL EVOLUTION PERTH BASIN SEISMIC STRATIGRAPHY © 2019 The Authors. Basin Research © 2019 John Wiley & Sons Ltd, European Association of Geoscientists & Engineers and International Association of Sedimentologists Understanding the development of sedimentary systems during continental rifting is important for tracking environmental change and lithospheric processes. Conceptual models have been developed for the sourcing, routing and facies architecture of sediments in rift-settings, driven in part by quantitative sediment tracking. Here, we present laser ablation split-stream detrital zircon U/Pb geochronology and Hf-isotopes for post-rift (Cretaceous-Paleogene) clastic sediments from Ocean Drilling Program (ODP) wells and Plio-Pleistocene palaeoshoreline material, from the southern margin of Australia. Provenance results are contextualized through comparison with well-characterized source regions and regional pre- and syn-rift sediment reservoirs to track changes associated with Australia-Antarctica separation during East Gondwana break-up. The provenance character of the post-rift sediments studied are distinct from pre-existing sediment reservoirs and demonstrate termination of previously stable sediment routing systems and a dominance of local basement of the Proterozoic Madura and Coompana provinces (~1.2 Ga and CHUR-like Hf-signatures; Moodini Supersuite) in offshore ODP wells. A composite post-rift Cretaceous?-Eocene sample in the easternmost well expresses characteristic Phanerozoic zircon age signatures associated with source regions in eastern Australia that are interpreted to reflect inversion in the Ceduna Sub-basin to the east. Detrital zircon signatures in Plio-Pleistocene palaeoshoreline sediment are also relatively distinct, indicating derivation from coastal erosion in the Leeuwin Complex (~0.5 and 0.7 Ga subchondritic grains) and Albany–Fraser Orogen (~1.2 Ga subchondritic grains) several hundred, to over a thousand kilometers to the west. Collectively, results highlight the fundamental geological processes associated with rifting that dramatically change the character of sediment provenance via (a) isolation of pre-existing primary and secondary sources of detritus, (b) development of new source regions in basin compartmentalized highs and localized fault scarps, and (c) establishment of marine and coastal currents that redefine clastic sediment transport. 2019 Journal Article http://hdl.handle.net/20.500.11937/76474 10.1111/bre.12403 English WILEY fulltext |
| spellingShingle | Science & Technology Physical Sciences Geosciences, Multidisciplinary Geology Bight Basin Eucla Basin Hf-isotopes Leg 182 long-shore drift Ocean Drilling Program sediment routing U/Pb geochronology GREAT-AUSTRALIAN-BIGHT ALBANY-FRASER OROGEN U-PB HF-ISOTOPE WESTERN-AUSTRALIA TRACE-ELEMENT CONTINENTAL-MARGIN CRUSTAL EVOLUTION PERTH BASIN SEISMIC STRATIGRAPHY Barham, Milo Kirkland, Chris Changing of the guards: Detrital zircon provenance tracking sedimentological reorganization of a post-Gondwanan rift margin |
| title | Changing of the guards: Detrital zircon provenance tracking sedimentological reorganization of a post-Gondwanan rift margin |
| title_full | Changing of the guards: Detrital zircon provenance tracking sedimentological reorganization of a post-Gondwanan rift margin |
| title_fullStr | Changing of the guards: Detrital zircon provenance tracking sedimentological reorganization of a post-Gondwanan rift margin |
| title_full_unstemmed | Changing of the guards: Detrital zircon provenance tracking sedimentological reorganization of a post-Gondwanan rift margin |
| title_short | Changing of the guards: Detrital zircon provenance tracking sedimentological reorganization of a post-Gondwanan rift margin |
| title_sort | changing of the guards: detrital zircon provenance tracking sedimentological reorganization of a post-gondwanan rift margin |
| topic | Science & Technology Physical Sciences Geosciences, Multidisciplinary Geology Bight Basin Eucla Basin Hf-isotopes Leg 182 long-shore drift Ocean Drilling Program sediment routing U/Pb geochronology GREAT-AUSTRALIAN-BIGHT ALBANY-FRASER OROGEN U-PB HF-ISOTOPE WESTERN-AUSTRALIA TRACE-ELEMENT CONTINENTAL-MARGIN CRUSTAL EVOLUTION PERTH BASIN SEISMIC STRATIGRAPHY |
| url | http://hdl.handle.net/20.500.11937/76474 |