The Dufek Intrusion is a mafic layered intrusion that was emplaced into present-day Antarctica approximately 183 million years ago.[1][2][3][4] It comprises two outcropping sections called the Dufek Massif and the Forrestal Range that are thought to be connected beneath the Sallee Snowfield.
The Dufek intrusion is associated with large volumes of Jurassic tholeiitic magmatism associated with the breakup of Gondwana. This magmatism stretched from northern Victoria Land to Dronning Maud Land and onwards into Africa and Australia. Stratigraphy within the intrusion includes the 1.8 km thick Dufek Massif section and associated nanataks. This massif section is composed of the 230 m thick Walker Anorthosite, with laminated plagioclase cumulates, overlain by the Aughenbaugh Gabbro. This gabbro consists of laminated plagioclase with and the augite-pigeonite pyroxene cumulus. The upper portion of the intrusion consists of the 1.7 km thick Forrestal Range section, with the Saratoga Gabbro cumulates overlain by the 300 m thick Lexington Granophyre.[5]
^"Stratigraphy of the layered gabbroic Dufek Intrusion, Antarctica - ScienceBase-Catalog". www.sciencebase.gov. US: United States Geological Survey. Retrieved 2019-02-13.
^"Page 1 Stratigraphy of the Layered Gabbroic Dufek Intrusion, Antarctica" (PDF). US: United States Geological Survey.
^Behrendt, J. C.; Drewry, D. J.; Jankowski, E.; Grim, M. S. (1980-08-29). "Aeromagnetic and radio echo ice-sounding measurements show much greater area of the dufek intrusion, antarctica". Science. 209 (4460). US: 1014–1017. Bibcode:1980Sci...209.1014B. doi:10.1126/science.209.4460.1014. PMID 17747230. S2CID 7156310.
^S.D.Burgess, S.A.Bowring, T.H.Fleming & D.H.Elliot, 2015. High-precision geochronology links the Ferrar large igneous province with early-Jurassic ocean anoxia and biotic crisis. Earth and Planetary Science Letters, ISSN 0012-821X, Vol: 415, Page: 90-99
^Ford, Arthur; Himmelberg, Glen (1991). Tingey, Robert (ed.). Geology and crystallization of the Dufek intrusion, in The Geology of Antarctica. Oxford: Clarendon Press. pp. 175–214. ISBN 0198544677.
The DufekIntrusion is a mafic layered intrusion that was emplaced into present-day Antarctica approximately 183 million years ago. It comprises two outcropping...
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into the Davis Valley for about 4 kilometres (2.5 mi). Rocks of the DufekIntrusion are visible in the Dufuk Massif and the Forrestal Range, and are thought...
Beck, Palaeomagnetism and Magnetic Polarity Zones in the Jurassic DufekIntrusion, Pensacola Mountains, Antarctica, Geophysical Journal International...
Ford (1973-91) on the petrology of Antarctica and specifically on the Dufekintrusion of the northern Pensacola Mountains was critical for the understanding...
Sea region at approximately 55°S. This eruptions phase includes the DufekIntrusion, the Ferrar Dolerite sills and dikes, extrusive rocks consisting of...
with A.B. Ford (1979-2000) on the geochronology and petrology of the DufekIntrusion of the northern Pensacola Mountains was critical for the understanding...
miles (110 km; 69 mi) long, located within the Queen Maud Mountains on the Dufek Coast of the continent of Antarctica. The range borders the eastern side...
Greenland there are remnants of flood basalts and igneous intrusions, such as the Skaergaard intrusion. Notable rock provinces (metamorphic igneous rocks, ultramafics...
transition between temperatures not to exceed 1 minute. No evidence of water intrusion or condensation is allowed. Immersion of the watch in a suitable pressure...
saved and asked forgiveness from the cave goddess "Jao Mae Tham" for the intrusion of pumps, ropes and people during the rescue. Some observers, primarily...
sensitive resources in or near vulnerable waterways from potential threats or intrusions by swimmers or scuba divers. The need for military underwater security...
Appropriation Defamation Slander Libel False light Invasion of privacy Intrusion on seclusion Breach of confidence Abuse of process Malicious prosecution...
of eggs, larval organisms and plankton on reefs respond to deep water intrusions. Similarly, as internal waves and bores move vertically, surface-dwelling...
technologies, requires cybersecurity measures to stop software breaches and intrusions, as well as information privacy measures. Communication and transparency...
Physics Institute that would ensure the lake remains uncontaminated upon intrusion. Lukin has repeatedly reassured other signatory nations to the Antarctic...
2020. National Aeronautics and Space Administration (20 December 2013). "Suit Water Intrusion Mishap Investigation Report" (PDF). Retrieved 3 July 2020....
underwater intrusion and sabotage. March 12, 2009, sale of multiple DDS sensors, which protect a strategic site against underwater intrusion. May 25, 2009...
resources both in or nearby vulnerable waterways from potential threats or intrusions by frogmen. Frogmen on clandestine operations use rebreathers, as the...
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