Revised plate motions relative to the hotspots from combined Atlantic and Indian Ocean hotspot tracks

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doi: 10.1130/0091-7613(1993)021<0275:RPMRTT>2.3.CO;2
Author(s): Müller, R. Dietmar; Royer, Jean-Yves; Lawver, Lawrence A.
Author Affiliation(s): Primary:
Scripps Institution of Oceanography, La Jolla, CA, United States
Laboratoire de Geodynamique, France
University of Texas, United States
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 21(3), p.275-278. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. 28 refs.; 1 table, sketch maps
Summary: We use an updated model for global relative plate motions during the past 130 m.y. together with a compilation of bathymetry and recently published radiometric dates of major hotspot tracks to derive a plate-motion model relative to major hotspots in the Atlantic and Indian oceans. Interactive computer graphics were used to find the best fit of dated hotspot tracks on the Australian, Indian, African, and North and South American plates relative to present-day hotspots assumed fixed in the mantle. One set of rotation parameters can be found that satisfies all data constraints back to chron 34 (84 Ma) and supports little motion between the major hotspots in this hemisphere. For times between 130 and 84 Ma, the plate model is based solely on the trails of the Tristan da Cunha and Great Meteor hotspots. This approach results in a location of the Kerguelen hotspot distinct from and south of the Rajmahal Traps for this time interval. Between 115 and 105 Ma, our model locates the hotspot underneath the southern Kerguelen Plateau, which is compatible with an age estimate of this part of the plateau of 115-95 Ma. Our model suggests that the 85°E ridge between lat 10°N and the Afanasiy Nikitin seamounts may have been formed by a hotspot now located underneath the eastern Conrad rise.
Year of Publication: 1993
Research Program: ODP Ocean Drilling Program
Key Words: 18 Geophysics, Solid-Earth; Atlantic Ocean; Cenozoic; Cretaceous; Data processing; Hot spots; Indian Ocean; Leg 115; Leg 121; Mesozoic; Movement; Ocean Drilling Program; Plate tectonics; Reconstruction
Coordinates: S131002 N050454 E0734953 E0590100
S310148 N052304 E0933525 E0873548
Record ID: 1993007431
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