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NSW

NSW Tech Talk: New insights into sedimentary processes on the margin of the Great Barrier Reef from the reprocessing of historical seismic reflection data.

Wednesday, November 17, 2021
1800
2000

ASEG NSW Tech Talk

Presenter:James Daniell (Fender Geophysics)

Title: New insights into sedimentary processes on the margin of the Great Barrier Reef from the reprocessing of historical seismic reflection data.

Registration: https://us02web.zoom.us/webinar/register/WN_7aC3mTsMTwK4YogAYam53A

Description

Mixed siliciclastic–carbonate margins receive significant amounts of both terrigenous siliciclastic material from rivers and carbonate material from biogenic sources. The Great Barrier Reef (GBR) is the largest mixed siliciclastic-carbonate margin on earth and detailed stratigraphic analysis is a key tool for understanding the evolution of this sedimentary system; however, the stratigraphy of the offshore central GBR is poorly understood due to its designation as a UNSECO World Heritage Site. This designation limited the acquisition of reflection seismic data over the GBR and has prevented detailed stratigraphic analysis of the reef and its margins. Geoscience Australia conducted limited seismic surveys over the GBR during the 1970-80s though much of this data has remained unprocessed and subsequently unpublished. Key results from this research are:

1. Significant improvements can be made to the seismic reflection data by applying modern processing algorithms.
2. Shelf-edge deltas near Townsville are preserved by their deposition on to an upper slope broad, low gradient terrace which also limits the transport of coarse sediment downslope. Their ‘lobe’ shape indicates a supply dominated environment.
3. Shelf-edge deltas from the Grafton and Flora Passages are clearly incised by submarine canyons that transport sediment downslope. In the Cairns region shelf-edge deltas have a cuspate form and indicate a wave dominated environment.
4. Reef growth is common on the topsets and upper forests of these deltas indicating that these coarse sedimentary environments are favourable for coral colonisation; therefore, as the shelf extends due to lowstand delta deposition, new habitats are also created for coral reefs.
5. The process driving the clear differences between the northern and central GBR is not well understood; however, ongoing subsidence of the central GBR likely plays a significant role.

Sedimentary processes at the margin of the GBR are clearly diverse. Documenting these differences will aid the interpretation of other modern mixed margins and those in the geological record.

Sixth International Conference on Engineering Geophysics (ICEG)

Thursday, October 28, 2021
1130 GMT
1600 GMT

ASEG is pleased to announce its collaboration with SEG for the highly anticipated Sixth International Conference on Engineering Geophysics (ICEG) that will be held from 25 - 28 Oct 2021 Virtual | Cape town South Africa.  This provides us the opportunity to provide all ASEG Members to ATTEND virtually with an interactive an immersive experience and the ability to connect with like-minded individuals from across the globe.

 

ASEG members receive a discounted price of $250 USD by contacting Suba Jaganathan on sjaganathan@seg.org.

ICEG 2021 will concentrate on global innovation, creativity, advances, and new approaches in the field of engineering/environmental geophysics and related fields. In addition to the core engineering/environmental and geotechnical focuses of this coming event, special sessions in related applications of archaeology, energy and forensic geophysics will be included. 

 

To view the entire technical programme, please visit our website where you can download it.

Sixth International Conference on Engineering Geophysics (ICEG)

Wednesday, October 27, 2021
1130 GMT
1600 GMT

ASEG is pleased to announce its collaboration with SEG for the highly anticipated Sixth International Conference on Engineering Geophysics (ICEG) that will be held from 25 - 28 Oct 2021 Virtual | Cape town South Africa.  This provides us the opportunity to provide all ASEG Members to ATTEND virtually with an interactive an immersive experience and the ability to connect with like-minded individuals from across the globe.

 

ASEG members receive a discounted price of $250 USD by contacting Suba Jaganathan on sjaganathan@seg.org.

ICEG 2021 will concentrate on global innovation, creativity, advances, and new approaches in the field of engineering/environmental geophysics and related fields. In addition to the core engineering/environmental and geotechnical focuses of this coming event, special sessions in related applications of archaeology, energy and forensic geophysics will be included. 

 

To view the entire technical programme, please visit our website where you can download it.

Sixth International Conference on Engineering Geophysics (ICEG)

Tuesday, October 26, 2021
1130 GMT
1600 GMT

ASEG is pleased to announce its collaboration with SEG for the highly anticipated Sixth International Conference on Engineering Geophysics (ICEG) that will be held from 25 - 28 Oct 2021 Virtual | Cape town South Africa.  This provides us the opportunity to provide all ASEG Members to ATTEND virtually with an interactive an immersive experience and the ability to connect with like-minded individuals from across the globe.

 

ASEG members receive a discounted price of $250 USD by contacting Suba Jaganathan on sjaganathan@seg.org.

ICEG 2021 will concentrate on global innovation, creativity, advances, and new approaches in the field of engineering/environmental geophysics and related fields. In addition to the core engineering/environmental and geotechnical focuses of this coming event, special sessions in related applications of archaeology, energy and forensic geophysics will be included. 

 

To view the entire technical programme, please visit our website where you can download it.

 

Sixth International Conference on Engineering Geophysics (ICEG)

Monday, October 25, 2021
1130 GMT
1600 GMT

ASEG is pleased to announce its collaboration with SEG for the highly anticipated Sixth International Conference on Engineering Geophysics (ICEG) that will be held from 25 - 28 Oct 2021 Virtual | Cape town South Africa.  This provides us the opportunity to provide all ASEG Members to ATTEND virtually with an interactive an immersive experience and the ability to connect with like-minded individuals from across the globe.

 

ASEG members receive a discounted price of $250 USD by contacting Suba Jaganathan on sjaganathan@seg.org.

ICEG 2021 will concentrate on global innovation, creativity, advances, and new approaches in the field of engineering/environmental geophysics and related fields. In addition to the core engineering/environmental and geotechnical focuses of this coming event, special sessions in related applications of archaeology, energy and forensic geophysics will be included. 

 

To view the entire technical programme, please visit our website where you can download it.

 

SEG workshop: Geophysics in Geothermal Energy – Today and Tomorrow

Thursday, October 14, 2021
1400
1900

Geophysics in Geothermal Energy – Today and Tomorrow

12–14 October 2021 | Virtual Workshop

 

ASEG is pleased to announce its collaboration with SEG for the highly anticipated Geophysics in Geothermal Energy – Today and Tomorrow workshop is up on our website. Be a part of this highly-anticipated virtual event that will be taking place from 12–14 October. This provides us the opportunity to provide all ASEG Members to ATTEND virtually with an interactive an immersive experience and the ability to connect with like-minded individuals from across the globe.

 

ASEG members receive a special discounted price of $US320. In order to benefit from the above rates, they should contact Suba Jaganathan on sjaganathan@seg.org.

 

Our technical committee has created a special workshop that branches out into specific topics that run parallel to each other, thus attendees can curate and choose the session they would like to view. A recording will also be available within 24 hours for attendees to re-watch any session they have missed, thus providing an enriching and wholesome experience throughout the workshop. We encourage anyone involved in geoscience or geothermal resource exploration to join in on this informative conversation: seismic processers, petrophysicists, rock physicists, geologists, geophysicists, geomechanicists and reservoir engineers.

 

To view the entire technical programme, please visit our website where you can download it, or watch the video for what you can look forward to during the workshop:

REGISTER NOW

SEG workshop: Geophysics in Geothermal Energy – Today and Tomorrow

Wednesday, October 13, 2021
1400
1900

Geophysics in Geothermal Energy – Today and Tomorrow

12–14 October 2021 | Virtual Workshop

 

ASEG is pleased to announce its collaboration with SEG for the highly anticipated Geophysics in Geothermal Energy – Today and Tomorrow workshop is up on our website. Be a part of this highly-anticipated virtual event that will be taking place from 12–14 October. This provides us the opportunity to provide all ASEG Members to ATTEND virtually with an interactive an immersive experience and the ability to connect with like-minded individuals from across the globe.

 

ASEG members receive a special discounted price of $US320. In order to benefit from the above rates, they should contact Suba Jaganathan on sjaganathan@seg.org.

 

Our technical committee has created a special workshop that branches out into specific topics that run parallel to each other, thus attendees can curate and choose the session they would like to view. A recording will also be available within 24 hours for attendees to re-watch any session they have missed, thus providing an enriching and wholesome experience throughout the workshop. We encourage anyone involved in geoscience or geothermal resource exploration to join in on this informative conversation: seismic processers, petrophysicists, rock physicists, geologists, geophysicists, geomechanicists and reservoir engineers.

 

To view the entire technical programme, please visit our website where you can download it, or watch the video for what you can look forward to during the workshop:

REGISTER NOW

SEG workshop: Geophysics in Geothermal Energy – Today and Tomorrow

Tuesday, October 12, 2021
1400
1900

Geophysics in Geothermal Energy – Today and Tomorrow

12–14 October 2021 | Virtual Workshop

 

ASEG is pleased to announce its collaboration with SEG for the highly anticipated Geophysics in Geothermal Energy – Today and Tomorrow workshop is up on our website. Be a part of this highly-anticipated virtual event that will be taking place from 12–14 October. This provides us the opportunity to provide all ASEG Members to ATTEND virtually with an interactive an immersive experience and the ability to connect with like-minded individuals from across the globe.

 

ASEG members receive a special discounted price of $US320. In order to benefit from the above rates, they should contact Suba Jaganathan on sjaganathan@seg.org.

 

Our technical committee has created a special workshop that branches out into specific topics that run parallel to each other, thus attendees can curate and choose the session they would like to view. A recording will also be available within 24 hours for attendees to re-watch any session they have missed, thus providing an enriching and wholesome experience throughout the workshop. We encourage anyone involved in geoscience or geothermal resource exploration to join in on this informative conversation: seismic processers, petrophysicists, rock physicists, geologists, geophysicists, geomechanicists and reservoir engineers.

 

To view the entire technical programme, please visit our website where you can download it, or watch the video for what you can look forward to during the workshop:

REGISTER NOW

NSW Tech Night: Enhancing statewide geophysics with high resolution company data

Wednesday, October 20, 2021
1800
1900

Titles &  Presenters:

Enhancing statewide geophysics with high resolution company data - Dr Sam Matthews (GSNSW)

Proposed NSW geophysical acquisition 2021-2022 - Astrid Carlton (GSNSW)

Date & Time: Wednesday 20th October 2021, 6:00 pm to 7:00 pm AEDT

Registration: https://us02web.zoom.us/webinar/register/WN_fWZnFRp1Q2q9wOapDGGHkA

Overviews:

Sam’s talk will provide a behind the scenes look at the creation of enhanced statewide geophysical merges incorporating high resolution company data. Following the QA/QC and metadata harvest from decades of legacy geophysics data, a specially created algorithm is applied to provide a quantitative aid in survey selection for inclusion in the merges. A small data workshop is included which highlights how all open-file geophysical data in NSW can be accessed for free through our online portal MinView.

Astrid’s talk will detail the expansive array of regional geophysics occurring throughout NSW from 2021 and into the future. The recent completion of the Cobar AEM and AMR surveys, as well as the Mundi AEM survey are only the tip of the iceberg in NSW. A wealth of regional geophysical surveys spanning a wide range of techniques are also in the works and promise exciting data.

NSW Tech night: Tilting of the Australian Continent: New Evidence from the Subsidence and Deposition History of the Northern Carnarvon Basin

Wednesday, June 16, 2021
1730 for 1800 start
1900

The next NSW technical meeting will be held on Wednesday 16th June (apologies for the short notice), we will also be livestreaming on zoom and it will be uploaded to ASEG's YouTube channel later. Please see details below:

 

Presenter:          Dr Stuart Clark (UNSW) and Patrick Makuluni (UNSW)

Topic:                  Tilting of the Australian Continent: New Evidence from the Subsidence and Deposition History of the Northern Carnarvon Basin

Time:                   5:30 for 6pm start

Address:             Level 2, Club York (99 York St, Sydney. Room 'York 2')

 

Zoom registration:         https://us02web.zoom.us/webinar/register/WN_Qf8x55wZT2SSUPOi3nBYuQ

Meeting registration:    https://www.surveymonkey.com/r/YBRXQND by Tuesday 15th June - due to COVID restrictions we require a registration for in-person meetings, see the attached document for Club York's COVID statement. If you have trouble registering please email nswsecretary@aseg.org.au 

 

Summary:

Studies of the global sea-level changes, plate kinematics, marine inundation, and morphology of the continental shelves suggest that the Australian continent has been tilting north eastwards since the Late Cretaceous. Our work investigates the direct impact of this phenomenon and the preceding tectonic events on the evolution of the Northern Carnarvon Basin evolution and its hydrocarbon resources. We use backstripping and decompaction techniques to develop subsidence, sedimentation, and porosity evolution models for the basin, which sits on the axis of the tilt. The goal is to highlight the spatial and temporal variation of subsidence and sedimentation rates, then give insights into the factors that created accommodation space for sediments. Then assess their impacts on the porosity of the Early Cretaceous reservoirs within the basin. The results reveal a north-eastward shift of subsidence and sedimentation rates from the Early Jurassic to the present in the region. In the Early Jurassic to Early Cretaceous, this variation was caused by the Palaeozoic-Mesozoic rifting events that produced higher tectonic subsidence (~3km) and higher sediment supply in the southwestern Exmouth and Barrow sub-basins, with reducing intensity in the northeastern direction towards Dampier and Beagle Sub-basin. From cretaceous to the present, subsidence and sediment distribution were impacted by the dynamic topography and the northeastwards tilting of the Australian continent. Subsidence along the NE-SW transect and the porosity evolution model results also demonstrate the tilting occurring in these sub-basins.

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