Insights into the Great Australian Bight gained through marine geology and benthic ecology studies

2018 ◽  
Vol 58 (2) ◽  
pp. 845 ◽  
Author(s):  
Andrew Ross ◽  
Alan Williams ◽  
Asrar Talukder ◽  
Joanna Parr ◽  
Christine Trefry ◽  
...  

While the Great Australian Bight (GAB) represents one of the most prospective deep water basins in Australia, its vast geographic extent and deep sedimentary sequences remain poorly characterised. Recently, multidisciplinary research has been conducted to better characterise the continental and abyssal slope of the Ceduna Sub-basin. The Great Australian Bight Deepwater Marine Program (GABDMP) aimed to build a regional understanding of the deep water GAB marine geology and benthic ecology. This three-year research program encompassed four research voyages that aimed to sample and characterise deep water outcropping facies, volcanic seamounts, potential seeps and their associated biological communities. These voyages used a variety of equipment to achieve the research goals and included the deployment of autonomous underwater and remotely operated vehicles and a seafloor coring system. Numerous sites across the Ceduna Sub-basin from 700 to 5501 m water depth were studied. Sampling operations collected over 2.8 tons of rocks, 148 m of core, 55 698 biological specimens and 48 097 km2 of mapping data. Nearly 4000 geological samples have been analysed to date. This paper will summarise the key findings from the GABDMP and the geological and biological insights that have been revealed through this multidisciplinary research program.

2017 ◽  
Vol 57 (2) ◽  
pp. 798 ◽  
Author(s):  
Andrew Ross ◽  
Alan Williams ◽  
Asrar Talukder ◽  
Joanna Parr ◽  
Christine Trefry ◽  
...  

The Great Australian Bight (GAB) represents one of Australia’s most prospective frontier hydrocarbon exploration regions. Its largest subregion – the Ceduna sub-basin – is a deep (slope to abyss) area of 126 300 km2 with a 15-km deep sedimentary sequence that remains effectively untested. Knowledge of the Ceduna sub-basin’s geology is rapidly evolving following recent collection of 3D seismic datasets, but many questions remain about its geological evolution. The composition of the seabed biota and its ecology in the deep GAB was virtually unknown. To address a range of geological and biological questions, the multidisciplinary Great Australian Bight Deepwater Marine Program aims to build a more comprehensive regional understanding of the geology of the deep (~700–5437 m) GAB, with a focus on rocky outcrops, segif and volcanic seamounts, and to document aspects of the biota and benthic ecology for the first time. A field campaign of 63 days in 2015 aboard the RV Investigator and a second support vessel for an Autonomous Underwater Vehicle completed a detailed mapping of 10 225 km2 of seabed. In addition, physical geological and biological sampling collected 1.3 tonnes of volcanic and sedimentary rocks and over 25 553 biological specimens. A surprisingly complex deep-water sedimentary environment was revealed, including several previously unmapped deep-water canyons and 10 previously unmapped volcanic seamounts. A total of 430 species were collected, of which nearly half appeared to be unknown to science. This paper uses results from this survey to provide insights into the geological processes that have shaped the GAB, and briefly describes the makeup of biological assemblages present on the seabed.


1995 ◽  
Vol 38 (5-6) ◽  
Author(s):  
B. Helly

The research activity of the Ravello European Center for Cultural Heritage in seismic risk areas is part of the Council of Europe's Major Risks EUR-OPA agreement. The program aims to identify traditional antiseismic building techniques. with a view to subsequent revitalization, tapping know-how within the local community. This requires analysis of the techniques and methods that have developed over the years in local communities. The multidisciplinary research program set up for this purpose has adopted the archeological approach. thereby recognizing that physical and inaterial assets provide a key source of information.


2017 ◽  
Vol 19 (5) ◽  
pp. e173 ◽  
Author(s):  
Helena Grönqvist ◽  
Erik Martin Gustaf Olsson ◽  
Birgitta Johansson ◽  
Claes Held ◽  
Jonas Sjöström ◽  
...  

1975 ◽  
Vol 15 (2) ◽  
pp. 55
Author(s):  
Ian McPhee

THE GIPPSLAND Basin is established as a prolific producer of oil and gas from a number of giant fields and other major discoveries are yet to be developed. Further discoveries can be expected in this petroliferous basin which has good future exploration potential. The Bass Basin has been disappointing as commercial discoveries have eluded the explorers. However source and reservoir rocks are present and the basin has future promise if the key to the nature of accumulations can be found. The Otway and Great Australian Bight Basins cover a vast area and include very thick potential source formations and good reservoir facies. Thick sedimentary sequences in the deep basin have been little explored and no significant shows encountered. The basins have potential but there are exploration difficulties to be overcome before full potential can be understood.


2014 ◽  
Vol 121 (4) ◽  
pp. 989-994 ◽  
Author(s):  
Kristopher T. Kimmell ◽  
Anthony L. Petraglia ◽  
Robert Bakos ◽  
Thomas Rodenhouse ◽  
Paul K. Maurer ◽  
...  

The Department of Neurosurgery at the University of Rochester has a long legacy of excellent patient care and innovation in the neurosciences. The department's founder, Dr. William Van Wagenen, was a direct pupil of Harvey Cushing and the first president of the Harvey Cushing Society. His successor, Dr. Frank P. Smith, was also a leader in organized neurosurgery and helped to permanently memorialize his mentor with an endowed fellowship that today is one of the most prestigious training awards in neurosurgery. The first 2 chiefs are honored every year by the department with memorial invited lectureships in their names. The department is home to a thriving multidisciplinary research program that fulfills the lifelong vision of its founder, Dr. Van Wagenen.


2012 ◽  
Vol 53 (29) ◽  
pp. 3784-3787 ◽  
Author(s):  
Hua Zhang ◽  
Zeinab Khalil ◽  
Melissa M. Conte ◽  
Fabien Plisson ◽  
Robert J. Capon

2016 ◽  
Vol 34 (2) ◽  
Author(s):  
Filipe Japiassú Leitão ◽  
Arthur Ayres Neto ◽  
Rosemary Vieira

ABSTRACT. Multibeam sonar systems have transformed the area of underwater geoacoustics and present an important tool for seabed characterization. This work aims to demonstrate the processing and interpretation of multibeam bathymetric data, supported by geological samples collected in the area of Deception Island, South Shetland Islands – Antarctic...Keywords: bathymetry, seabed, marine geology, underwater geoacoustic. RESUMO. Sonares multifeixe têm transformado a área de geoacústica submarina e se apresentado como uma ferramenta importante para a caracterização do fundo marinho...Palavras-chave: batimetria, fundo marinho, geologia marinha, geoacústica submarina.


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