Project information
DAVIDSON, Dr Garry
University of Tasmania
Macquarie Island
Project aim
Macquarie Island offers a rare land-based cross-section through the deep ocean floor, which covers 60% of our Earth. It formed 11 million years ago as slow spreading crust, which has had minimal study compared to more common fast spreading crust. Does the difference in spreading speed produce different crustal geometry, composition, hydrothermal fluids, and cycling of sulfur between ocean and crust? To gain insights to these and related questions, we propose to study uplifted and eroded sections through a series of fault zones, spaced along the length of Macquarie Island, which were the last magmatic, structural and hydrothermal events to occur before shifting stresses drove the seafloor up to form the Macquarie Ridge mountain chain.
Related publications
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Macquarie Island: its geology and structural history, and the timing and tectonic setting of its N-MORB to E-MORB magmatism. Geological Society of America, Special Publication. Ophiolites and oceanic crust: new insights from field studies and the Ocean Drilling Program., 2000
(Ref: 9957)
Authors:Category 1: Peer-reviewed literature
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Structural controls on sulphide deposition at the dyke-lava boundary, slow-spreading ocean crust, Macquarie Island. Terra Nova, 2003
(Ref: 11344)
Category 1: Peer-reviewed literature
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Hydrothermal sulfate precipitation in an oceanic crust transfer fault: Macquarie Island, Southern Ocean. Dynamic Earth: Past, Present and Future. 17th Australian Geological Convention. 8-13 February 2004. Hobart, Tasmania. Book of Abstracts, 2004
(Ref: 11341)
Category 3: Abstract
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Discrete quartz-veined alteration zones in basaltic ocean crust, Mt Martin district, Macquarie Island: Evidence for transient structural tapping of oceanic hydrothermal fluids. Dynamic Earth: Past, Present and Future. 17th Australian Geological Convention. 8-13 February 2004. Hobart, Tasmania. Book of Abstracts, 2004
(Ref: 11340)
Authors:Category 3: Abstract
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Strontium and oxygen isotopic profiles through a complete sequence of oceanic crust exposed on Macquarie Island. Dynamic Earth: Past, Present and Future. 17th Australian Geological Convention. 8-13 February 2004. Hobart, Tasmania. Book of Abstracts., 2004
(Ref: 11338)
Category 3: Abstract