The Owen Ridge uplift in the Arabian Sea; implications for the sedimentary record of Indian monsoon in late Miocene

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doi: 10.1016/j.epsl.2014.03.011
Author(s): Rodriguez, Mathieu; Chamot-Rooke, Nicolas; Huchon, Philippe; Fournier, Marc; Delescluse, Matthias
Author Affiliation(s): Primary:
Laboratoire de Géologie de l'Ecole Normale Supérieure de Paris, Paris, France
Other:
Université Pierre and Marie Curie, France
Volume Title: Earth and Planetary Science Letters
Source: Earth and Planetary Science Letters, Vol.394, p.1-12. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0012-821X CODEN: EPSLA2
Note: In English. 101 refs.; illus., incl. sects., sketch maps
Summary: The pelagic cover of the Owen Ridge in the Arabian Sea recorded the evolution of the Indian monsoon since the Middle Miocene. The uplift of the Owen Ridge resulted from tectonic processes along the previously unidentified Miocene India-Arabia plate boundary. Based on seismic reflection data tied with deep-sea drilling to track the Miocene India-Arabia plate boundary, we propose a new timing for the uplift of the Owen Ridge and highlight its impact on the record of climate changes in pelagic sediments. The new dataset reveals a fracture zone east of the Owen Ridge corresponding to the fossil plate boundary, and documents that the main uplift of the Owen Ridge occurred close to ∼8.5 Ma, and is coeval with a major uplift of the east Oman margin. Late Miocene deformation at the India-Arabia plate boundary is also coeval with the onset of intra-plate deformation in the Central Indian Ocean, suggesting a kinematic change of India and surrounding plates in the Late Miocene. The uplift of the Owen Ridge above the lysocline at ∼8.5 Ma accounts for a better preservation of Globigerina bulloides in the pelagic cover, previously misinterpreted as the result of a monsoon intensification event. Abstract Copyright (2014) Elsevier, B.V.
Year of Publication: 2014
Research Program: DSDP Deep Sea Drilling Project
ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Arabian Sea; Cenozoic; Climate change; DSDP Site 222; DSDP Site 223; Deep Sea Drilling Project; Deformation; Foraminifera; Geophysical profiles; Geophysical surveys; Indian Ocean; Indus Fan; Invertebrata; Leg 117; Leg 23; Marine sediments; Microfossils; Miocene; Monsoons; Neogene; ODP Site 720; ODP Site 721; ODP Site 722; ODP Site 730; ODP Site 731; Ocean Drilling Program; Ocean circulation; Owen Ridge; Owen fracture zone; Paleoclimatology; Paleoenvironment; Pelagic environment; Plate tectonics; Protista; Sediments; Seismic profiles; Surveys; Tectonics; Tertiary; Turbidite; Uplifts; Upper Miocene
Coordinates: N140000 N200000 E0610000 E0590000
Record ID: 2014061915
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands