On the possible relation of the Louisville Hotspot and Ontong Java Plateau from Integrated Ocean Drilling Program Expedition 330 results

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Author(s): Koppers, A. A.; Yamazaki, T.; Geldmacher, J.
Integrated Ocean Drilling Program, Expedition 330 Scientific Party, College Station, TX
Author Affiliation(s): Primary:
Oregon State University, COAS, Corvallis, OR, United States
National Institute of Advanced Industrial Science and Technology, Japan
Integrated Ocean Drilling Program at Texas A&M University, United States
Volume Title: AGU 2011 fall meeting
Source: American Geophysical Union Fall Meeting, Vol.2011; American Geophysical Union 2011 fall meeting, San Francisco, CA, Dec. 5-9, 2011. Publisher: American Geophysical Union, Washington, DC, United States
Note: In English
Summary: It has been hypothesized that the Ontong Java Plateau formed from the plume head of the Louisville mantle plume around 120 Ma. Integrated Ocean Drilling Program (IODP) Expedition 330 drilled five different guyots in the Louisville Seamount Trail ranging in age between 80 and 50 Ma. Paleolatitude estimates, 40Ar/39Ar radiometric ages and geochemical data collected during Expedition 330 will provide the ultimate test of whether the oldest Louisville seamounts were formed close to the 18-28°S (with an average of 24±2°) paleolatitude determined from basalt drilled on the Ontong Java Plateau during ODP Leg 192 and whether this Large Igneous Province (LIP) was genetically linked to the Louisville hotspot. If so, this would allow for the possibility that indeed the preceding plume head of the Louisville mantle upwelling caused the massive LIP volcanism forming the Ontong Java Plateau around 120 Ma. The outcome of such a test is of fundamental importance in our understanding of LIP and hotspot formation and lies at the heart of the mantle plume debate.
Year of Publication: 2011
Research Program: IODP Integrated Ocean Drilling Program
ODP Ocean Drilling Program
Key Words: 18 Geophysics, Solid-Earth; Absolute age; Ar/Ar; Basalts; Dates; East Pacific; Equatorial Pacific; Expedition 330; Hot spots; Igneous rocks; Integrated Ocean Drilling Program; Intraplate processes; Large igneous provinces; Leg 192; Louisville Hot Spot; Louisville Ridge; Louisville Seamount Trail; Mantle; Mantle plumes; Ocean Drilling Program; Ocean floors; Ontong Java Plateau; Pacific Ocean; Plate tectonics; Seamounts; South Pacific; Southeast Pacific; Volcanic rocks; West Pacific
Coordinates: S381200 S262900 W1683800 W1744400
S050100 N010000 E1643000 E1570000
Record ID: 2014045330
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