Tectonic plate that existed during the early Paleozoic through late Cenozoic time
Phoenix Plate
The Panthalassa Ocean 250 million years ago, showing the Phoenix Plate in the south, the Farallon Plate in the northeast and the Izanagi Plate in the northwest.
Type
Historical
The tectonic plates of the Pacific Ocean in the Early Jurassic (180 Ma)
The Phoenix Plate (also known as the Aluk Plate or Drake Plate) was a tectonic plate that existed during the early Paleozoic through late Cenozoic time. It formed a triple junction with the Izanagi and Farallon plates in the Panthalassa Ocean as early as 410 million years ago, during which time the Phoenix Plate was subducting under eastern Gondwana.[1]
By the Late Jurassic–Early Cretaceous 150–130 million years ago, the Pacific Plate arose from the Izanagi-Farallon-Phoenix triple junction, resulting in the creation of the Izanagi-Pacific-Phoenix and Farallon-Pacific-Phoenix triple junctions.[2] Subduction ceased east of Australia about 120 million years ago, during which time a transform/transpressional boundary formed.[3] This transform/transpressional boundary with the Phoenix Plate lasted until about 80 million years ago as the plate continued to descend southwards as a result of Late Cretaceous subduction under the Antarctic Peninsula.[3][4]
During the Late Cretaceous or early Cenozoic, the southwestern part of the Phoenix Plate fragmented into the Charcot Plate, much in the same way in which the Rivera and Cocos plates were formed by the fragmentation of the Farallon Plate.[5]
The Antarctic-Phoenix Ridge, a mid-oceanic ridge between the Antarctic and Phoenix plates, initiated following Late Cretaceous to early Cenozoic times when the Phoenix Plate had divergent boundaries with the Bellingshausen and Pacific plates in the southwestern Pacific Ocean.[6] A major decrease in spreading rate of the Antarctic-Phoenix Ridge and the convergence rate of the Phoenix Plate with the Antarctic Plate occurred around 52.3 million years ago, followed by subduction of a segment of the Antarctic-Phoenix Ridge between 50 and 43 million years ago.[7][8]
Although active subduction occurred for over 100 million years, it stopped or slowed dramatically about 3.3 million years ago when seafloor spreading on the Antarctic-Phoenix Ridge ceased, leaving a small remnant of the former Phoenix Plate incorporated in the Antarctic Plate.[6] This remnant underlies the southwest Drake Passage and is surrounded by the Shackleton Fracture Zone in the northeast, the Hero Fracture Zone in the southwest, the South Shetland Trough in the southeast and the extinct Antarctic-Phoenix Ridge in the northwest.[6][9]
^Matthews, Kara J.; Maloney, Kayla T.; Zahirovic, Sabin; Williams, Simon E.; Seton, Maria; Müller, R. Dietmar. "Global plate boundary evolution and kinematics since the late Paleozoic". University of Oxford. p. 752. Retrieved 2020-04-07.
^Smith, Alan D. (2007). "A plate model for Jurassic to Recent intraplate volcanism in the Pacific Oceanic basin". Plates, Plumes, and Planetary Processes. Boulder, Colorado: Geological Society of America. pp. 274, 275, 276. ISBN 978-0-8137-2430-0.
^ abSeton, M.; Müller, R. D. (2008). Reconstructing the junction between Panthalassa and Tethys since the Early Cretaceous. Eastern Australasian Basins III. Sydney: Petroleum Exploration Society of Australia, Special Publications. pp. 263, 264, 265.
^Larter, R. D.; A. P. Cunningham; P. F. Barker; K. Gohl; F. O. Nitsche (2002-12-13). "Tectonic evolution of the Pacific margin of Antarctica, 1, Late Cretaceous tectonic reconstructions" (PDF). Journal of Geophysical Research: Solid Earth. 107 (B12): 2345. Bibcode:2002JGRB..107.2345L. doi:10.1029/2000JB000052.
^Larter, Robert D.; Barker, Peter F.; Cunningham, Alex P.; Gohl, Karsten (2002). "Tectonic evolution of the Pacific margin of Antarctica, I. Late Cretaceous tectonic reconstructions" (PDF). Journal of Geophysical Research: Solid Earth. 107 (B12): EPM 5-1-EPM 5-19. Bibcode:2002JGRB..107.2345L. doi:10.1029/2000JB000052.
^ abcEagles, Graeme (2003). "Tectonic evolution of the Antarctic–Phoenix plate system since 15 Ma". Earth and Planetary Science Letters: 97, 98. ISSN 0012-821X.
^McCarron, J. J.; Larter, R. D. (1998). "Late Cretaceous to early Tertiary subduction history of the Antarctic Peninsula". Journal of the Geological Society. 155 (2): 255. Bibcode:1998JGSoc.155..255M. doi:10.1144/gsjgs.155.2.0255. S2CID 129764564.
^Taylor, Brian (1995). Backarc Basins: Tectonics and Magmatism. Plenum Press. p. 317. ISBN 0-306-44937-4.
^Riley, Teal R.; Bristow, Charlie S.; Leat, P.T.; Burton-Johnson, Alex (2019). "Geochronology and geochemistry of the northern Scotia Sea: A revised interpretation of the North and West Scotia ridge junction". Earth and Planetary Science Letters. 518: 137. Bibcode:2019E&PSL.518..136R. doi:10.1016/j.epsl.2019.04.031. ISSN 0012-821X.
The PhoenixPlate (also known as the Aluk Plate or Drake Plate) was a tectonic plate that existed during the early Paleozoic through late Cenozoic time...
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Bellingshausen Plate – Ancient tectonic plate that fused onto the Antarctic Plate Charcot Plate – Fragment of the Phoenix tectonic plate fused to the Antarctic...
Shetland Plate to the south from the Antarctic Plate to the north. This trench is the remnant of a subduction zone where the defunct PhoenixPlate, now part...
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Cretaceous and Oligocene (90-30 Ma) except for the subduction of the PhoenixPlate on the Pacific margin of the land bridge that still connected South...
spreading center is attributed to the subduction of the PhoenixPlate under the Antarctic Plate. Slab rollback and South Shetland Trench oceanward retreat...
the remnant of a subduction zone where the defunct PhoenixPlate, now part of the Antarctic Plate, subducted under the Antarctic Peninsula and the South...
Koh Ophiolite marks the initiation of the subduction of the extinct PhoenixPlate. When the slab subducted under the united southern continent of Gondwana...
J.J. (2023). "Reconciling the Cretaceous breakup and demise of the PhoenixPlate with East Gondwana orogenesis in New Zealand" (PDF). Earth-Science Reviews...
Pacific-Farallon-Phoenix triple junction, was a geologic triple junction in the southwestern Pacific Basin where three tectonic plates met: the Pacific Plate, the...
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spreading axis. The breakup of Gondwana, and resulting forces on the former PhoenixPlate as the large igneous province of the Ontong Java–Manihiki–Hikurangi...
between the PhoenixPlate and the Antarctic plate starting roughly 200 million years ago during the Mesozoic. It is believed that the Phoenixplate stopped...
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