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The Kerguelen Plateau: new paleontologic and paleomagnetic age constraints on growth history from ODP Leg 183 drilling


Wise, SW and Coxall, HK and Wahnert, V and Antretter, MJ and Inokuchi, H and Coffin, MF and Frey, FA and Wallace, PJ and McArthur, JM and Weis, D and Zhao, X and Teagle, DAH and Saccocia, PJ and Reusch, DN and Pringle, MS and Nicolaysen, KE and Neal, CR and Muller, RD and Moore, CL and Mahoney, JJL and Keszthelyi, L and Duncan, RA and Delius, H and Damuth, JE and Damasceno, D and Boore, MK and Boehm, F and Barling, J and Arndt, NT, The Kerguelen Plateau: new paleontologic and paleomagnetic age constraints on growth history from ODP Leg 183 drilling, Royal Society of New Zealand Bulletin, 35 pp. 239-247. ISSN 1176-1865 (2002) [Refereed Article]

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Although the submergent Kerguelen Plateau (KP), a large igneous province in the Southern Indian Ocean, was initiated after the rifting of India from Antarctica, i ts construction, fed by the Kerguelen hot spot, has taken place over the past c. 114 m. y. Preliminary shipboard paleontologic and paleomagnetic dates from ODP Leg 183 on marine sediments above igneous basement help constraint the growth history of this feature. The oldest such date is late Albian (105- 106 Ma or younger) from Site 1136 on the southern K.P, whereas the youngest is early Oligocene (more precisely, 34 Ma) from Sites 1139 and 1140 on the northern KP. Elan Bank provided intermediate ages of late Campanian (c. 75 Ma); however, Site. 1 138 on the central KP yielded lower Turonian (c. 93.5 Ma) marine sediments (Cenomanian/ Turonian boundary "black shales") above upper Albian - lowest Cenomanian (c. 102-96 Ma) non-marine (fluvial) claystones, sandstones, and conglomerates. This latter date (from shore-based palynology) diminishes considerably the previously inferred age difference between the southern and central KP and, in so doing, tends to blur the geophysical distinction between these two domains.

Item Details

Item Type:Refereed Article
Keywords:Kerguelen Plateau, Broken Ridge, large igneous province, flood basalts
Research Division:Earth Sciences
Research Group:Geology
Research Field:Marine geoscience
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the earth sciences
UTAS Author:Coffin, MF (Professor Mike Coffin)
ID Code:111148
Year Published:2002
Deposited By:Oceans and Cryosphere
Deposited On:2016-08-31
Last Modified:2016-10-11

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