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Du Toit Nunataks

Mountains in Antarctica

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photo	File:C80020s1 Ant.Map Shackleton Range.jpg
photo_caption	Shackleton Range, Read Mountains in lower right
map	Antarctica
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| volcanic_arc/belt = The Du Toit Nunataks () are a group of nunataks between Cornwall Glacier and Glen Glacier, marking the western end of the Read Mountains in the Shackleton Range of Antarctica.

Names

The Du Toit Nunataks were photographed from the air by the United States Navy, 1967, and surveyed by the British Antarctic Survey, 1968–71. In association with the names of geologists grouped in this area, they were named by the UK Antarctic Place-Names Committee after Alexander Logie du Toit, a South African geologist.

Location

The Du Toit Nunataks lie to the south of the Shotton Snowfield to the west end of the Read Mountains. They lie between the Cornwall Glacier and the Glen Glacier, both of which flow south to join the Recovery Glacier, which flows westward past the south of the Du Toit Nunataks.

Geology

The Du Toit Nunataks are in the Read Group of the southern belt of the Shackleton Mountains. They are mainly composed of partly migmatised quartzitic, basic, calcareous and pelitic rocks. In places they are interlayered with gneissic granites, and intruded by granites and basic rocks. Dating of the metagranites gives ages of around 1,760 and 1,600 million years. Rb–Sr and K-Ar mineral cooling ages are 1650–1550 million years.

Features

Read Mountains. Du Toit Nunataks to the west (left) between Cornwall Glacier and Glen Glacier.

Named geographical features on the 1983 United States Geological Survey map include:

Hatch Plain

Poldervaart Edge

An east-facing escarpment rising to about 1300 m and trending northeast–southwest for 3.5 mi in the Du Toil Nunataks, Read Mountains, Shackleton Range. Photographed from the air by the U.S. Navy, 1967, and surveyed by BAS, 1968-71. In association with the names of geologists grouped in this area, named by the UK-APC in 1971 after Professor Arie Poldervaart (1919–64), Dutch petrologist known for his research on basaltic rocks.

Spath Crest

Zittel Cliffs

References

Sources

{{citation|url=https://pubs.usgs.gov/fedgov/70039167/report.pdf |accessdate=2023-12-03 |edition=2 |editor-last=Alberts |title=Geographic Names of the Antarctic |editor-first=Fred G.
{{citation |url=https://commons.wikimedia.org/wiki/File:C80020s1_Ant.Map_Shackleton_Range.jpg |accessdate=2023-12-04
{{citation |title=Palaeoproterozoic to Palaeozoic magmatic and metamorphic events in the Shackleton Range, East Antarctica: Constraints from zircon and monazite dating, and implications for the amalgamation of Gondwana |doi=10.1016/j.precamres.2009.03.008 |year=2009 |journal=Precambrian Research

Info: Wikipedia Source

This article was imported from Wikipedia and is available under the Creative Commons Attribution-ShareAlike 4.0 License. Content has been adapted to SurfDoc format. Original contributors can be found on the article history page.

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