Tilt signals at Mount Melbourne, Antarctica: evidence of a shallow volcanic source

Gambino, Salvatore; Aloisi, Marco; Falzone, Giuseppe; Ferro, Angelo

doi:10.3402/polar.v35.28269

Cited by 5 publications

(1 citation statement)

References 44 publications

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“…This field, placed between the Transantarctic Mountains rift shoulder and the western side of the West Antarctic Rift System (WARS) (Figure 1a), is considered to have the potential for future large‐scale explosive eruptions (Giordano et al., 2012). However, despite a variety of geological, geochemical and geophysical investigations performed to improve the knowledge of the MVF and assess its hazard (Adamson & Cavaney, 1967; Armstrong, 1978; Armienti et al., 1988; Armienti et al., 1991; Beccaluva, Coltorti, et al., 1991; Beccaluva, Civetta, et al., 1991; Bonaccorso et al., 1995; Bonaccorso et al., 1996; Cremisini et al., 1991; Del Carlo et al., 2022; Ferraccioli et al., 2000; Gambino et al., 2016; Gambino et al., 2021; GANOVEX Team, 1987; Giordano et al., 2012; Gubellini & Postpischl, 1991; Hörnig et al., 1991; Keys et al., 1983; Lanzafame & Villari, 1991; Lanza et al., 1991; Lee et al., 2015; Lyon, 1986; Lyon & Giggenbach, 1974; Manzoni & Miletto, 1988; Müller et al., 1991; Nathan & Schulte, 1967, 1968; Pasquale et al., 2009; Vignaroli et al., 2015; Wörner & Viereck, 1987, 1989; Wörner et al., 1989), there is no clear consensus on its geological structure and temporal evolution. The main reason is that ice covers most of the volcano, limiting the data collection to small, scattered areas of geological outcrops which prevent a detailed characterization of the volcanic area.…”

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confidence: 99%

The Sub‐Ice Structure of Mt. Melbourne Volcanic Field (Northern Victoria Land, Antarctica) Uncovered by High‐Resolution Aeromagnetic Data

et al. 2023

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The Mt. Melbourne Volcanic Field is a quiescent volcanic complex located in Northern Victoria Land, Antarctica, mostly covered by ice. Its inner structure has remained largely unknown, due to the paucity of outcrops and the lack of detailed multi‐disciplinary investigations. Here we present a novel high‐resolution aeromagnetic dataset, revealing strong long‐wavelength negative anomalies superimposed by short‐wavelength positive ones forming characteristic radial patterns. Automatic lineament detection, through the Hough transform technique applied to the tilt derivative of our magnetic dataset, shows prevailing NW‐SE‐to NNE‐SSW‐trending structural features, which combined with the few structural field observations contribute to define the deformation pattern. Pre‐existing and novel magnetic property measurements, coupled with available geochronological data, are used to constrain a two‐step 3D magnetic inversion. A layer‐structured Oldenburg‐Parker's inversion was utilized to model the deep and long‐wavelength components of the magnetic field, whereas a linear inversion based on a set of shallower prisms was used to model the short‐wavelength components. The final 3D model shows widespread reversely‐polarized volcanics, which are locally intruded and superimposed, respectively by swarms of normally‐polarized dikes and radial lava flows along paleo‐valleys. These results support the onset of volcanic activity in the entire field at least in the Matuyama magnetic epoch, that is, between 2.58 and 0.78 Ma.

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Section: Introductionmentioning

confidence: 99%

The Sub‐Ice Structure of Mt. Melbourne Volcanic Field (Northern Victoria Land, Antarctica) Uncovered by High‐Resolution Aeromagnetic Data

et al. 2023

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Monitoring activity in Mount Melbourne, Antarctica, by multi-temporal SAR interferometry based on the ICOPS algorithm

Hakim,

Sakina,

Fadhillah

et al. 2024

Geosci J

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Chapter 7.3 Mount Melbourne and Mount Rittmann

Gambino

Armienti

Cannata

et al. 2021

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Mount Melbourne and Mount Rittmann are quiescent, although potentially explosive, alkaline volcanoes located 100 km apart in Northern Victoria Land quite close to three stations (Mario Zucchelli Station, Gondwana and Jang Bogo). The earliest investigations on Mount Melbourne started at the end of the 1960s; Mount Rittmann was discovered during the 1988–89 Italian campaign and knowledge of it is more limited due to the extensive ice cover. The first geophysical observations at Mount Melbourne were set up in 1988 by the Italian National Antarctic Research Programme (PNRA), which has recently funded new volcanological, geochemical and geophysical investigations on both volcanoes. Mount Melbourne and Mount Rittmann are active, and are characterized by fumaroles that are fed by volcanic fluid; their seismicity shows typical volcano signals, such as long-period events and tremor. Slow deformative phases have been recognized in the Mount Melbourne summit area. Future implementation of monitoring systems would help to improve our knowledge and enable near-real-time data to be acquired in order to track the evolution of these volcanoes. This would prove extremely useful in volcanic risk mitigation, considering that both Mount Melbourne and Mount Rittmann are potentially capable of producing major explosive activity with a possible risk to large and distant communities.

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Tilt signals at Mount Melbourne, Antarctica: evidence of a shallow volcanic source

Cited by 5 publications

References 44 publications

The Sub‐Ice Structure of Mt. Melbourne Volcanic Field (Northern Victoria Land, Antarctica) Uncovered by High‐Resolution Aeromagnetic Data

The Sub‐Ice Structure of Mt. Melbourne Volcanic Field (Northern Victoria Land, Antarctica) Uncovered by High‐Resolution Aeromagnetic Data

Monitoring activity in Mount Melbourne, Antarctica, by multi-temporal SAR interferometry based on the ICOPS algorithm

Chapter 7.3 Mount Melbourne and Mount Rittmann

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