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3D modelling of granite intrusions in northwest Tasmania using petrophysical and residual gravity data


Eshaghi, E and Reading, AM and Roach, M and Cracknell, MJ and Duffett, M and Bombardieri, D, 3D modelling of granite intrusions in northwest Tasmania using petrophysical and residual gravity data, SEG Technical Program Expanded Abstracts 2016, 16-21 October 2016, Dallas, TX USA, pp. 1637-1642. ISSN 1949-4645 (2016) [Conference Extract]

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DOI: doi:10.1190/segam2016-13780273.1


Tasmania in southeast Australia is underlain by basement rocks dating from the Precambrian to the Cretaceous. One important event in the tectonic evolution of Tasmania is the intrusion of Devonian Granites which has resulted in metamorphism and mineralization in some regions. We construct a regional-detailed 3D model for northwest Tasmania including major geological units and estimate density values of each unit to investigate the tectonic setting and geometry of Devonian Granites. Our model contains 20 units with different density properties. The residual gravity data have been used to model the properties of these units and consequently the geometry of Devonian Granites. The new inversion refines the geometry of the Devonian Granites with respect to initial models. A new granite intrusion is also revealed by this study which is the subject of further investigation.

Item Details

Item Type:Conference Extract
Keywords:3D modelling, Tasmania, petrophysics, residual gravity
Research Division:Earth Sciences
Research Group:Geophysics
Research Field:Geophysics not elsewhere classified
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Eshaghi, E (Mr Esmaeil Eshaghi)
UTAS Author:Reading, AM (Professor Anya Reading)
UTAS Author:Roach, M (Dr Michael Roach)
UTAS Author:Cracknell, MJ (Dr Matthew Cracknell)
ID Code:111421
Year Published:2016
Deposited By:CODES ARC
Deposited On:2016-09-13
Last Modified:2016-09-16

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