Richard J. Arculus
Australian National University
Publications 269
1 CitationsSource
Abstract In August 2019 a large raft of pumice appeared in the territorial waters of Tonga. As in many other cases, this pumice raft was the only surface expression of a major submarine volcanic eruption. Discolored water and reconstruction of the drift path of the pumice raft using satellite imagery points towards ‘Volcano F’ in the Tofua Arc NW of the island of Vava’u as the most likely volcanic source. Here we present imagery from ESA’s Sentinel-2 satellite that captured the start of the subm...
Abstract In order to better understand the global halogen cycle and the behaviour of halogens during subduction, we investigated the concentrations of F, Cl, Br and I in suites of rare submarine glasses formed during subduction initiation on the Hunter Ridge (N. Fiji Basin) and from the northernmost part of the Tonga Arc. Additional submarine glasses from mature arcs and backarcs including the Tonga arc (Volcano A), North Fiji, Lau, Manus and Woodlark Basins were also investigated. The aim was t...
#1Oliver Nebel (Monash University)H-Index: 22
#2Paolo A. Sossi (IPGP: Institut de Physique du Globe de Paris)H-Index: 15
Last.Saskia Ruttor (Monash University)H-Index: 1
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Abstract Ocean-island basalts (OIB) are the products of intra-plate mantle melting above mantle plumes. These hot, buoyant upwellings rise from the deep mantle, possibly the core-mantle boundary, to the Earth's surface. Radiogenic isotope signatures of trace elements in OIB are consistent with a variety of crustally-derived recycled components in their source that are suggested to reside in the plume as eclogite or their pyroxenitic melt-reaction products. The global OIB compositional spectrum e...
1 CitationsSource
#1Elena Melekhova (UoB: University of Bristol)H-Index: 10
#2David Schlaphorst (UoB: University of Bristol)H-Index: 2
Last.Richard J. Arculus (ANU: Australian National University)H-Index: 56
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Abstract We reconstruct crustal structure along the Lesser Antilles island arc using an inversion approach combining constraints from petrology of magmatic crustal xenoliths and seismic receiver functions. Xenoliths show considerable island-to-island variation in xenolith petrology from plagioclase-free ultramafic lithologies to gabbros and gabbronorites with variable proportions of amphibole, indicative of changing magma differentiation depths. Xenoliths represent predominantly cumulate composi...
2 CitationsSource
#1Anders McCarthy (UoB: University of Bristol)H-Index: 2
#2Gene M. Yogodzinski (USC: University of South Carolina)H-Index: 23
Last.Osamu Ishizuka (AIST: National Institute of Advanced Industrial Science and Technology)H-Index: 32
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#1Richard J. ArculusH-Index: 56
#2Michael GurnisH-Index: 65
Last.Rupert SutherlandH-Index: 36
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The association of deep-sea trenches—steeply angled, planar zones where earthquakes occur deep into Earth’s interior—and chains, or arcs, of active, explosive volcanoes had been recognized for 90 years prior to the development of plate tectonic theory in the 1960s. Oceanic lithosphere is created at mid-ocean ridge spreading centers and recycled into the mantle at subduction zones, where down-going lithospheric plates dynamically sustain the deep-sea trenches. Study of subduction zone initiation ...
1 CitationsSource
#1Matthew J. Valetich (ANU: Australian National University)H-Index: 1
#2John A. Mavrogenes (ANU: Australian National University)H-Index: 29
Last.Susumu Umino (Kanazawa University)H-Index: 19
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Abstract Melt inclusions and submarine volcanic glasses of boninitic composition are well preserved in beach sands from the islands of Chichijima and Mukojima along the Bonin Ridge. Volcanic glass as well as orthopyroxene- and spinel hosted melt inclusions in these sands span almost the entirety of boninite series melt compositions, ranging from >18 wt% to
1 CitationsSource
#1Anders McCarthy (UoB: University of Bristol)H-Index: 2
#2Cyril Chelle-Michou (UoB: University of Bristol)H-Index: 7
Last.Jon D Blundy (UoB: University of Bristol)H-Index: 49
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1 CitationsSource