Seafloor spreading magnetic anomalies in the southeastern Arabian Sea

Author(s): Chaubey, A. K.; Bhattacharya, G. C.; Gopala Rao, D. Gopala
Author Affiliation(s): Primary:
National Institute of Oceanography, Dona Paula, Goa, India
Volume Title: Marine Geology
Source: Marine Geology, 128(1-2), p.105-114. Publisher: Elsevier, Amsterdam, Netherlands. ISSN: 0025-3227 CODEN: MAGEA6
Note: In English; illus.
Summary: Study of closely spaced new marine magnetic profiles in the southeastern Arabian Sea has enabled fairly confident identification of E-W trending linear magnetic anomalies 24 through 20. These magnetic lineations are consistently right laterally offset along numerous fracture zones and extend eastwards up to the base of the western slopes of the Laccadive Ridge. Obliteration of magnetic lineations further eastward is attributed to the emplacement of volcanic material of the Laccadive Ridge over the pre-existing oceanic crust. DSDP Site 221 is observed to be located on the reversely magnetized oceanic crust between anomalies 22 and 21 which provide a reliable age constraint (48 Myr) for the oceanic crust at this site. The presence of additional unidentifiable normal magnetic anomalies suggests a relatively complex spreading pattern (ridge jump?) in the vicinity of the Laccadive Ridge during the interval of anomalies 24 and 23.
Year of Publication: 1995
Research Program: DSDP Deep Sea Drilling Project
Key Words: 07 Marine Geology and Oceanography; 18 Geophysics, Solid-Earth; Arabian Sea; Bathymetry; Bottom features; Cenozoic; Crust; DSDP Site 221; Deep Sea Drilling Project; Fracture zones; Geophysical profiles; Indian Ocean; Laccadive Ridge; Laxmi Ridge; Leg 23; Magnetic anomalies; Magnetic profiles; Mid-ocean ridges; Ocean floors; Oceanic crust; Paleogene; Paleomagnetism; Reversals; Sea-floor spreading; Tertiary; Volcanism
Coordinates: N075811 N075811 E0682422 E0682422
Record ID: 1995053807
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands