Ile de la Possession

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  • Country
  • Volcanic Region
  • Primary Volcano Type
  • Last Known Eruption
  • 46.42°S
  • 51.75°E

  • 934 m
    3064 ft

  • 234040
  • Latitude
  • Longitude

  • Summit
    Elevation

  • Volcano
    Number

The Global Volcanism Program has no activity reports for Ile de la Possession.

The Global Volcanism Program has no Weekly Reports available for Ile de la Possession.

The Global Volcanism Program has no Bulletin Reports available for Ile de la Possession.

Ile de la Possession, located immediately west of Ile de l'Est in the Crozet archipelago, consists of a stratovolcano intruded by ring and cone dikes and modified by block faulting, marine erosion, and uplift. The structural center of the volcano is located on the western side of the 14 x 19 km wide island, which has an irregular shoreline. The stratovolcano was formed during at least five stages dating back to the Miocene. The eruption of plateau basalts from a rift system during stage IV was followed by a glacial period and then by the eruption of scoria cones and lava flows. The young scoria cones are of probable Holocene age and are distributed over much of the island. They are concentrated at the structural center on the west side and along a series of N-S and NE-trending fractures. The Mont Branca cone on the western flank has been estimated by Bellair (1964) to be not more than a few centuries old.

The Global Volcanism Program is not aware of any Holocene eruptions from Ile de la Possession. If this volcano has had large eruptions (VEI >= 4) prior to 10,000 years ago, information might be found on the Ile de la Possession page in the LaMEVE (Large Magnitude Explosive Volcanic Eruptions) database, a part of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).

This compilation of synonyms and subsidiary features may not be comprehensive. Features are organized into four major categories: Cones, Craters, Domes, and Thermal Features. Synonyms of features appear indented below the primary name. In some cases additional feature type, elevation, or location details are provided.


Cones

Feature Name Feature Type Elevation Latitude Longitude
Branca, Mont Cone
Crateres, Monte De Cone
Ile de la Possession, located immediately west of Ile de l'Est in the Crozet archipelago, is seen in this NASA Space Shuttle image (with north to the top). The 14 x 19 km wide island is structurally complex and has an irregular shoreline. It consists of a stratovolcano intruded by ring and cone dikes and modified by block faulting, marine erosion, and uplift. Young scoria cones of probable Holocene age are distributed over much of the island.

NASA Space Shuttle image ISS006-E-37990, 2003 (http://eol.jsc.nasa.gov/).

The following references have all been used during the compilation of data for this volcano, it is not a comprehensive bibliography. Discussion of another volcano or eruption (sometimes far from the one that is the subject of the manuscript) may produce a citation that is not at all apparent from the title.

Bellair P, 1964. Recent data on the geology of Isles Crozet. In: Adie R J (ed) {Antarctic Geol, Proc 1st Internatl Symp Antarctic Geol}, Amsterdam: Elsevier, p 3-7.

Gunn B M, Abranson E C, Watkins N D, Nougier J, 1972. Petrology and geochemistry of Iles Crozet: a summary. In: Adie R J (ed) {Antarctic Geol and Geophys}, IUGS Ser-B(1): 825-829.

LeMasurier W E, Thomson J W (eds), 1990. Volcanoes of the Antarctic Plate and Southern Oceans. Washington, D C: Amer Geophys Union, 487 p.

Volcano Types

Stratovolcano
Pyroclastic cone(s)

Tectonic Setting

Rift zone
Oceanic crust (< 15 km)

Rock Types

Major
Basalt / Picro-Basalt
Phonolite
Trachybasalt / Tephrite Basanite
Trachyandesite / Basaltic trachy-andesite

Population

Within 5 km
Within 10 km
Within 30 km
Within 100 km
0
0
0
0

Affiliated Databases

Large Eruptions of Ile de la Possession Information about large Quaternary eruptions (VEI >= 4) is cataloged in the Large Magnitude Explosive Volcanic Eruptions (LaMEVE) database of the Volcano Global Risk Identification and Analysis Project (VOGRIPA).
WOVOdat WOVOdat is a database of volcanic unrest; instrumentally and visually recorded changes in seismicity, ground deformation, gas emission, and other parameters from their normal baselines. It is sponsored by the World Organization of Volcano Observatories (WOVO) and presently hosted at the Earth Observatory of Singapore.
EarthChem EarthChem develops and maintains databases, software, and services that support the preservation, discovery, access and analysis of geochemical data, and facilitate their integration with the broad array of other available earth science parameters. EarthChem is operated by a joint team of disciplinary scientists, data scientists, data managers and information technology developers who are part of the NSF-funded data facility Integrated Earth Data Applications (IEDA). IEDA is a collaborative effort of EarthChem and the Marine Geoscience Data System (MGDS).
Smithsonian Collections Search the Smithsonian's NMNH Department of Mineral Sciences collections database. Go to the "Search Rocks and Ores" tab and use the Volcano Name drop-down to find samples.