An early India-Asia contact; paleomagnetic constraints from Ninetyeast Ridge, ODP Leg 121; with Suppl. Data 92-15

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doi: 10.1130/0091-7613(1992)020<0395:AEIACP>2.3.CO;2
Author(s): Klootwijk, Chris T.; Gee, Jeffrey S.; Peirce, John W.; Smith, Guy M.; McFadden, Phil L.
Author Affiliation(s): Primary:
Bur. Miner. Resour., Canberra, Australia
Other:
Scripps Inst. Oceanogr., United States
Geophys. Explor. and Dev. Co., Calgary, AB, Canada
St. Louis Univ., United States
Volume Title: Geology (Boulder)
Source: Geology (Boulder), 20(5), p.395-398. Publisher: Geological Society of America (GSA), Boulder, CO, United States. ISSN: 0091-7613 CODEN: GLGYBA
Note: In English. 30 refs.; illus. incl. sketch map
Summary: New paleomagnetic results from sedimentary rock and basement of the Ninetyeast Ridge (Ocean Drilling Program Leg 121, Sites 756-758) detail the northward movement of the Indian plate for the past 80 m.y. Analysis of the combined paleolatitude-age profile indicates a distinct reduction in India's northward movement rate at 55+ Ma, interpreted as completion of suturing of Greater India and Asia. India's northward motion slowed from 18-19.5 cm/yr to 4.5 cm/yr for the location of Site 758. Comparison of this profile with paleomagnetic data from the wider Himalayan region indicates that initial contact between northwestern Greater India and southern Asia was already established by Cretaceous-Tertiary time. This supports a possible causal link between the India-Asia convergence and the Deccan Traps extrusion.
Year of Publication: 1992
Research Program: ODP Ocean Drilling Program
Key Words: 18 Geophysics, Solid-Earth; Basement; Cenozoic; Continental drift; Cretaceous; Indian Ocean; Indian Plate; Interpretation; Leg 121; Mesozoic; Mid-ocean ridges; Movement; Ninetyeast Ridge; ODP Site 756; ODP Site 757; ODP Site 758; Ocean Drilling Program; Paleolatitude; Paleomagnetism; Plate convergence; Plate tectonics; Pole positions; Regression analysis; Sedimentary rocks; Statistical analysis; Suture zones; Tectonophysics; Upper Cretaceous
Coordinates: S272118 S272118 E0873548 E0873548
S052304 S052302 E0902142 E0902136
S170130 S170125 E0881100 E0881050
Record ID: 1992017352
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