Mount Petras
Mount Petras | |
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![]() Map of Mount Petras | |
Highest point | |
Coordinates | 75°51′S 128°38′W / 75.850°S 128.633°W[1] |
Naming | |
Etymology | Named for Theodore Argyres Petras |
Geography | |
Mount Petras is a mountain in Antarctica. It consists of volcanic rocks, most of Cretaceous age but there is also an Eocene-Oligocene volcanic system that may have been emplaced inside of thin ice. It is part of the Marie Byrd Land Volcanic Province and is its oldest volcano.
Geography and geology
Mount Petras lies in the coastal region of
It is an angular mountain
Both
Mount Petras is part of the volcanic province of Marie Byrd Land, which may be a product of a mantle plume. Other volcanoes in this province of West Antarctic volcanoes are the Ames Range, Crary Mountains, Executive Committee Range, Flood Range, Hobbs Coast nunataks, Kohler Range, Mount Murphy, Mount Siple, Mount Takahe and Mount Waesche. Some of these volcanoes are still active today.[11] Marie Byrd Land itself is a crustal dome, with its "summit" in the area of Mount Petras; the dome was probably formed by the impingement of the mantle plume under the crust[18] and volcanism may have spread outwards away from Mount Petras.[3]
Geologic history
Name and research history
The volcanic history of Mount Petras is important for reconstructing the volcanic and glacial history of Marie Byrd Land.
Mount Petras was discovered during the 1939-1941 United States Antarctic Service Expedition and named after the pilot of the expedition.[5] It was visited in 1959, 1967–1968, 1977-1978 and 1993-1994 by field expeditions.[23] During the 20th century, Mount Petras was viewed as a volcano that had formed deep under ice on a Cenozoic marine erosion surface covering West Antarctica, which had then been deformed by tectonic uplift.[1]
References
- ^ a b c d e f Wilch & McIntosh 2000, p. 477.
- ^ Wilch, McIntosh & Panter 2021, p. 519.
- ^ a b LeMasurier 1990, p. 163.
- ^ González-Ferrán & González-Bonorino 1972, p. 265.
- ^ a b c d LeMasurier 1990, p. 239.
- ^ Wilch, McIntosh & Panter 2021, p. 551.
- ^ a b c
Doumani, George A.; Ehlers, Ernest G. (1 July 1962). "Petrography of Rocks from Mountains in Marie Byrd Land, West Antarctica". GSA Bulletin. 73 (7): 881. ISSN 0016-7606.
- ^ LeMasurier, McIntosh & Rex 1981, p. 20.
- ^ González-Ferrán & González-Bonorino 1972, p. 267.
- ^ González-Ferrán & González-Bonorino 1972, p. 266.
- ^ a b c d e Wilch & McIntosh 2000, p. 478.
- ^ Wilch & McIntosh 2000, p. 479.
- ^ Pankhurst 1998, p. 2537.
- ^ a b
Nelson, D. A.; Cottle, J. M. (1 November 2018). "The secular development of accretionary orogens: linking the Gondwana magmatic arc record of West Antarctica, Australia and South America". Gondwana Research. 63: 9. ISSN 1342-937X.
- ^ LeMasurier, McIntosh & Rex 1981, p. 19.
- ^ Wilch & McIntosh 2000, p. 482.
- ^ Wilch & McIntosh 2000, p. 484.
- ^
Mukasa, Samuel B.; Dalziel, Ian W. D. (1 April 2000). "Marie Byrd Land, West Antarctica: Evolution of Gondwana's Pacific margin constrained by zircon U-Pb geochronology and feldspar common-Pb isotopic compositions". GSA Bulletin. 112 (4): 612. ISSN 0016-7606.
- ^ Wilch & McIntosh 2000, p. 481.
- ^ Francis, J. E.; Marenssi, S.; Levy, R.; Hambrey, M.; Thorn, V. C.; Mohr, B.; Brinkhuis, H.; Warnaar, J.; Zachos, J.; Bohaty, S.; DeConto, R. (1 January 2008). "Chapter 8 From Greenhouse to Icehouse – The Eocene/Oligocene in Antarctica". Developments in Earth and Environmental Sciences. 8. Elsevier: 314.
- ^ Wilch & McIntosh 2000, p. 489.
- ^ Pankhurst 1998, p. 2544.
- ^ Wilch, McIntosh & Panter 2021, p. 520.
- Sources
- González-Ferrán, Oscar; González-Bonorino, Felix (1972). "The volcanic ranges of Marie Byrd Land between long. 100 and 140 W.". Antarctic Geology and Geophysics. Vol. 261. Oslo: Universitetsforlaget.
- LeMasurier, W. E.; McIntosh, W. C.; Rex, D. C. (1981). "Mid-Tertiary glacial history recorded at Mount Petras, Marie Byrd Land". Antarctic Journal of the United States. 21: 19–21.
- LeMasurier, W. E. (1990). "B. Marie Byrd Land". Volcanoes of the Antarctic Plate and Southern Oceans. Antarctic Research Series. Vol. 48. pp. 146–255. ISBN 0-87590-172-7.
- Pankhurst, R. J. (1998). "Geochronology and geochemistry of pre‐Jurassic superterranes in Marie Byrd Land, Antarctica". Journal of Geophysical Research: Solid Earth. 103 (B2): 2529–2547. .
- Wilch, T. I.; McIntosh, W. C. (December 2000). "Eocene and Oligocene volcanism at Mount Petras, Marie Byrd Land: implications for middle Cenozoic ice sheet reconstructions in West Antarctica". Antarctic Science. 12 (4): 477–491. S2CID 129298738.
- Wilch, T. I.; McIntosh, W. C.; Panter, K. S. (1 January 2021). "Chapter 5.4a Marie Byrd Land and Ellsworth Land: volcanology". Geological Society, London, Memoirs. 55 (1): 515–576. ISSN 0435-4052.