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|Title:||National Facility External Users: R. J. Arculus (ANU)|
|Acronym:||National Facility user: Arculus R.|
|Investigator(s):|| Richard Arculus
Australian National University - Research School of Earth Sciences [details]
List of surveys that this project was on. Click on column header to sort.
Use [details] link to view survey details (map, reports, metadata etc) including links to download data.
|R. Arculus (ANU)||MNF Southern Surveyor research voyage SS2012_v02.The northern Lau Backarc Basin: magmatism, tectonics, and hydrothermal activity. Scientific Objectives: The northern Lau Basin is a region of rapidly extending and newly-forming crust, seamed by multiple zones of sea-floor spreading, rifting, and faulting consequent to the clockwise rotation of the Tonga Arc away from the Fiji-Lau Ridge (Fig. 1a). Demise of the former Vitiaz Arc has led to the establishment of a new Australian-Pacific plate boundary that wraps around the north end of Fiji, and connects with the Tonga Trench via a set of ridges (e.g., Futuna Spreading Centre, Northwest Lau Spreading Centre), rifts (e.g., Rochambeau Rifts), transform faults, and extension zones (Fig. 1b). Voyage ss2012-v02 will explore via a west to east reconnaissance of these tectonic elements, the accompanying magmatism and hydrothermal activity. The principal investigators and their shipboard scientific colleagues will collaborate in studies of the petrology and geochemistry of the volcanic rocks (including major and trace element abundances, isotopic characteristics), and water column geochemical compositions. Part extract from Voyage plan, please read plan for full details.|
| SS 02/2009
|Prof R. J. Arculus (ANU)||The core objective is to use water column chemistry and bathymetric mapping tools in order identify the tectonic and volcanic features that have are most likely to host hydrothermal systems. Hydrothermal sites will be specifically targeted with camera tow and dredge operations to identify and collect rock samples that will be analysed later in laboratories. Taken from the SS 02/2009 voyage plan.|
| ST 02/2008
|R. Arculus (ANU)||Southern Surveyor Transit voyage from Suva to Cairns. No voyage plan or summary expected.|
| SS 07/2008
|Professor Richard J. Arculus (ANU)|| Scientific Objectives
The fastest spreading backarc region on Earth forms the northern Lau Basin (NLB), and is the strongest source of mantle-derived 3He-rich hydrothermal plumes in the southwestern Pacific. Following Southern Surveyor NoToVE voyage (SS11/04) to the northern Tofua arc-Fonualei Rifts (Tonga) system, and ... the first Leg of SS07/2008, we propose to survey the bathymetry, magnetic characteristics, petrology, hydrothermal activity, and hence origins and evolution of ..(this regeon)... which are essentially unstudied. ....
Following high resolution 30 kHz multibeam bathymetric surveys, vertical CTD hydrocasts and tow-yos coupled with rock (glass) dredging will be used to sample along/across-strike of the spreading centres. Post-voyage laboratory 3-D magnetisation inversions ...[to]... identify mantle sources likely including Pacific- and Indian-type mid-ocean ridge and Samoan plume components, and hence obtain insights into upper mantle flows.
In the 2nd Leg we will extend the area of exploration planned for SS07/2008 to the Peggy Ridge, a leaky transform linking spreading centres in the southeastern Lau Basin with the NWLSC and Futuna Spreading Centre to the north of Fiji. We will use the same approach as in the first Leg using high resolution 30 kHz multibeam surveys, hydrocasts and tow-yos coupled with dredging to sample along and adjacent to the Peggy Ridge. Post-voyage laboratory laboratory studies will use the same techniques and pursue the same objectives as in the Ist leg.
Summarised from the SS200807 Marine National Facility voyage plan.
| SS 06/2007
|R. Arculus (ANU)|| Volcanism and tectonism of the South Bismarck Microplate,Papua New Guinea.
To study the space - time distribution of the volcanic activity in order to investigate its relationships to the tectonic development fo the South Bismark Microplate, with the aim of understanding deviations from the normal patterns of volcanic activity associated with subduction and termination of subduction.
| SS 11/2004
|J. Arculus (ANU)|| Voyage SS 11/2004, NOTOVE-2004 (Northern Tonga Vents Expedition) will continue to investigate the
Submarine hydrothermal plume activity and petrology of the northern Tofua Arc, Tonga, complimenting the work of SS 02/2003.
Specific objectives are:
1. To perform the first detailed, high-resolution, swathmap bathymetric surveys of individual submarine volcanoes of the northern Tofua Arc between 20o 50'S and 15o 20'S, using the Kongsberg EM300 system; 2. To perform the first detailed, high-resolution swathmap bathymetric survey of the Fonualei Rifts, a nascent backarc basin immediately adjacent and northwest of Fonualei; 3. Dredge igneous rock targets identified on these submarine volcanoes, and the floor of the Fonualei Rifts, in order to recover fresh glassy rock samples for detailed age studies and chemical analysis, particularly of volatile elements and compounds, radiogenic and stable isotopic characteristics. 4. Dredge hydrothermal sulfide-rich and altered rock samples for studies of base and precious metal mineralisation; 5. To explore with the transmissometer/nephelometer-equipped CTD rosette for hydrothermal plume activity in these volcanoes and rifts, and to recover water samples for immediate analysis on board and subsequent shore-based laboratory analysis.
Taken from SS11/2004 Voyage Plan.
| SS 06/2004
|Professor Richard J Arculus (Australian National University)|| Scientific Objectives:
To swath-map the Coriolis Troughs (Vanuatu) (Fig. 1) with multibeam sonar, in order to identify areas of exposed lavas, including coverage of the known occurrences in the northern end of the Futuna Basin and the Nifonea Ridge in the Vate Trough;
To explore for and map the distribution of active hydrothermal venting systems of the Coriolis Troughs;
To revisit the Nifonea Ridge hydrothermal vent system discovered on RV Franklin (FR08/2001), and determined whether changes have occurred in the intervening 3 years;
To recover fresh igneous and mineralised rock, sediment, and water samples associated with igneous activity in these Troughs.
| SS 02/2003
|Prof R. Arculus (ANU)||To investigate the submarine hydrothermal plume activity and petrology of the Eastern Lau spreading center and Neighbouring Tofu Arc, Tonga (14 Mar - 3 Apr, 2003).|