The Lord Howe Seamount Chain has been known under a variety of different gazetted names, including the Lord Howe Seamounts, Lord Howe Guyots, Lord Howe Rise Guyots and the Middleton Chain.[4]
Topographic map of Zealandia with the Lord Howe Rise to the north west of New Zealand labelled.
The Lord Howe Seamount Chain is on the western slope of Lord Howe Rise, a deep-sea elevated plateau which is a submerged part of Zealandia.[2] The Tasmantid and Lord Howe seamount chains are both broadly within the Tasman basin (the abyssal plain between Lord Howe Rise and the Australian continental shelf), and lie on opposite sides of Dampier Ridge (a submerged continental fragment).[2][5]
The Lord Howe and Tasmantid chains each resulted from the Indo-Australian Plate moving northward over a stationary hotspot; historically the hotspot for the Lord Howe chain was expected to presently be beneath Flinders Seamount.[7] but is now thought likely to be somewhat to the south of this, possibly beyond the Heemskerck and Zeehaen seamounts.[8] Indeed the dating of this chain has only been as far south as Lord Howe Island which erupted 6.5 million years ago and there are other gaps in relevant knowledge of this hotspot chain. The chain has now been characterised by compositional analysis to be related at 28 million years to the South Rennell Trough spreading center as its potential initiation point with lessening magma being erupted progressively as the younger seamounts of the hot spot were formed.[1][8] On the Australian mainland, a third north-south sequence of extinct volcanoes (which includes the Glass House Mountains) is likely to have the same origin.[7][9] The Lord Howe Seamount Chain includes the following features:
^McDougall et al, Dampier Ridge, Tasman Sea, as a stranded continental fragment. Australian Journal of Earth Sciences 41 (1994). 395-406.
^Przeslawski et al. Biogeography of the Lord Howe Rise region, Tasman Sea. Deep-Sea Research Part II 58 (2011) 959–969.
^ abW. J. Morgan and J. P. Morgan. Plate velocities in hotspot reference frame: electronic supplement
^ abHansma, Jeroen; Tohver, Eric (2020). "Southward Drift of Eastern Australian Hotspots in the Paleomagnetic Reference Frame Is Consistent With Global True Polar Wander Estimates". Frontiers in Earth Science. 8: 489. Bibcode:2020FrEaS...8..489H. doi:10.3389/feart.2020.544496.
^Knesel, Kurt M.; Cohen, Benjamin E.; Vasconcelos, Paulo M.; Thiede, David S. (August 2008). "Rapid change in drift of the Australian plate records collision with Ontong Java plateau". Nature. 454 (7205): 754–757. Bibcode:2008Natur.454..754K. doi:10.1038/nature07138. ISSN 0028-0836. PMID 18685705. S2CID 4427792.
^ abDouglas (Smethurst), Amelia. The East Australian, Tasmantid and Lord Howe volcanoes : exploring the origins of three, contemporaneous, parallel chains of volcanism. (PhD thesis and appendix) (Thesis). doi:10.7488/era/2805. Retrieved 2023-03-30.
^ abMcDougall, I; Embleton, B; Stone, D (1981). "Origin and evolution of Lord Howe Island, southwest Pacific Ocean". Journal of the Geological Society of Australia. 28: 155–76. doi:10.1080/00167618108729154.
^ abQuilty, Patrick G. (1993). "Tasmantid and Lord Howe seamounts: biostratigraphy and palaeoceanographic significance". Alcheringa: An Australasian Journal of Palaeontology. 17 (1): 27-53}. doi:10.1080/03115519308619487.
October 27, 2023
lord, howe, seamount, chain, formed, during, miocene, features, many, coral, capped, guyots, parallel, seamount, chains, alongside, east, coast, australia, lord, howe, tasmantid, seamount, chains, both, north, south, through, parts, coral, tasman, these, chain. The Lord Howe Seamount Chain formed during the Miocene It features many coral capped guyots and is one of the two parallel seamount chains alongside the east coast of Australia the Lord Howe and Tasmantid seamount chains both run north south through parts of the Coral Sea and Tasman Sea 2 3 These chains have longitudes of approximately 159 E and 156 E respectively 2 Lord Howe Seamount Chain Interactive fullscreen map nearby articles Lord Howe Seamount Chain yellow are seamounts red islands if Wikipedia Graph module enabled LocationLocationCoral and Tasman seasCoordinates26 22 36 7 S 159 15 37 9 E 26 376861 S 159 260528 E 26 376861 159 260528GeologyTypeSeamount chainAge of rock28 6 4 Ma 1 PreꞒ Ꞓ O S D C P T J K Pg N Contents 1 Geography 1 1 Geology 2 See also 3 ReferencesGeography editThe Lord Howe Seamount Chain has been known under a variety of different gazetted names including the Lord Howe Seamounts Lord Howe Guyots Lord Howe Rise Guyots and the Middleton Chain 4 nbsp Topographic map of Zealandia with the Lord Howe Rise to the north west of New Zealand labelled The Lord Howe Seamount Chain is on the western slope of Lord Howe Rise a deep sea elevated plateau which is a submerged part of Zealandia 2 The Tasmantid and Lord Howe seamount chains are both broadly within the Tasman basin the abyssal plain between Lord Howe Rise and the Australian continental shelf and lie on opposite sides of Dampier Ridge a submerged continental fragment 2 5 The Lord Howe Seamount Chain extends from north of the Chesterfield group of islands 17 S 1 to Flinders Seamount 34 7 S 6 It includes the officially named Nova Bank Argo and Kelso seamounts Capel and Gifford guyots Middleton and Elizabeth reefs Lord Howe Island and Ball s Pyramid 2 Geology edit The Lord Howe and Tasmantid chains each resulted from the Indo Australian Plate moving northward over a stationary hotspot historically the hotspot for the Lord Howe chain was expected to presently be beneath Flinders Seamount 7 but is now thought likely to be somewhat to the south of this possibly beyond the Heemskerck and Zeehaen seamounts 8 Indeed the dating of this chain has only been as far south as Lord Howe Island which erupted 6 5 million years ago and there are other gaps in relevant knowledge of this hotspot chain The chain has now been characterised by compositional analysis to be related at 28 million years to the South Rennell Trough spreading center as its potential initiation point with lessening magma being erupted progressively as the younger seamounts of the hot spot were formed 1 8 On the Australian mainland a third north south sequence of extinct volcanoes which includes the Glass House Mountains is likely to have the same origin 7 9 The Lord Howe Seamount Chain includes the following features Lord Howe Seamounts Seamount Location Age NotesZeehaen Seamount 36 20 19 S 159 31 15 E 36 33855 S 159 52079 E 36 33855 159 52079 10 11 Heemskerck Seamount 36 16 39 S 159 06 29 E 36 27751 S 159 10809 E 36 27751 159 10809 10 Flinders Seamount 34 35 27 S 159 23 38 E 34 59096 S 159 39376 E 34 59096 159 39376 10 Ball s Pyramid 31 21 15 S 159 15 06 E 31 35417 S 159 25167 E 31 35417 159 25167 10 Lord Howe Island 31 33 15 S 159 05 06 E 31 55417 S 159 08500 E 31 55417 159 08500 6 9 to 6 4 Ma 10 11 12 Elizabeth Reef 29 34 00 S 159 05 00 E 29 56667 S 159 08333 E 29 56667 159 08333 10 Middleton Reef 29 27 00 S 159 07 00 E 29 45 S 159 11667 E 29 45 159 11667 10 Gifford Guyot 26 40 00 S 159 25 00 E 26 66667 S 159 41667 E 26 66667 159 41667 10 Dating of seamount top sediments is consistent with expected seamount age progression 13 Capel Bank 25 00 00 S 159 35 00 E 25 0 S 159 58333 E 25 0 159 58333 10 Dating of seamount top sediments is consistent with expected seamount age progression 13 Kelso Bank 24 46 00 S 159 30 00 E 24 76667 S 159 5 E 24 76667 159 5 10 Argo Bank 23 15 S 159 30 E 23 25 S 159 5 E 23 25 159 5 10 Nova Bank 22 11 00 S 159 12 00 E 22 18333 S 159 2 E 22 18333 159 2 23 Ma 10 12 Chesterfield Plateau 18 44 11 S 158 34 54 E 18 736381 S 158 581567 E 18 736381 158 581567 28 1 1 0 Ma 1 Horsehead Seamount 17 36 05 S 158 44 56 E 17 601454 S 158 748849 E 17 601454 158 748849 27 24 0 24 Ma 1 South Rennell Trough 28 Ma 1 See also editLord Howe Marine Park Gifford Marine ParkReferences edit a b c d e f Seton Maria Williams Simon Mortimer Nick Meffre Sebastien Micklethwaite Steven Zahirovic Sabin 2019 Magma production along the Lord Howe Seamount Chain northern Zealandia Geological Magazine 156 9 1605 1617 doi 10 1017 S0016756818000912 a b c d e Willem J M van der Linden Morphology of the Tasman sea floor New Zealand Journal of Geology and Geophysics Vol 13 1970 282 291 Seton Maria Williams Simon Mortimer Nick Meffre Sebastien Micklethwaite Steven Zahirovic Sabin 2019 01 22 Magma production along the Lord Howe Seamount Chain northern Zealandia Geological Magazine 156 9 1605 1617 Bibcode 2019GeoM 156 1605S doi 10 1017 S0016756818000912 ISSN 0016 7568 S2CID 134379148 Marine Gazetteer Placedetails Retrieved 2017 02 20 McDougall et al Dampier Ridge Tasman Sea as a stranded continental fragment Australian Journal of Earth Sciences 41 1994 395 406 Przeslawski et al Biogeography of the Lord Howe Rise region Tasman Sea Deep Sea Research Part II 58 2011 959 969 a b W J Morgan and J P Morgan Plate velocities in hotspot reference frame electronic supplement a b Hansma Jeroen Tohver Eric 2020 Southward Drift of Eastern Australian Hotspots in the Paleomagnetic Reference Frame Is Consistent With Global True Polar Wander Estimates Frontiers in Earth Science 8 489 Bibcode 2020FrEaS 8 489H doi 10 3389 feart 2020 544496 Knesel Kurt M Cohen Benjamin E Vasconcelos Paulo M Thiede David S August 2008 Rapid change in drift of the Australian plate records collision with Ontong Java plateau Nature 454 7205 754 757 Bibcode 2008Natur 454 754K doi 10 1038 nature07138 ISSN 0028 0836 PMID 18685705 S2CID 4427792 a b c d e f g h i j k l GEBCO Undersea Feature Names Gazetteer a b Douglas Smethurst Amelia The East Australian Tasmantid and Lord Howe volcanoes exploring the origins of three contemporaneous parallel chains of volcanism PhD thesis and appendix Thesis doi 10 7488 era 2805 Retrieved 2023 03 30 a b McDougall I Embleton B Stone D 1981 Origin and evolution of Lord Howe Island southwest Pacific Ocean Journal of the Geological Society of Australia 28 155 76 doi 10 1080 00167618108729154 a b Quilty Patrick G 1993 Tasmantid and Lord Howe seamounts biostratigraphy and palaeoceanographic significance Alcheringa An Australasian Journal of Palaeontology 17 1 27 53 doi 10 1080 03115519308619487 Retrieved from https en wikipedia org w index php title Lord Howe Seamount Chain amp oldid 1176737122, wikipedia, wiki, book, books, library,
