Browsing by Subject "volcanism"
Now showing items 1-15 of 15
-
Back-arc extension in the Andaman Sea: Tectonic and magmatic processes imaged by high-precision teleseismic double-difference earthquake relocation
(American Geophysical Union, 2013)The geometry, kinematics, and mode of back-arc extension along the Andaman Sea plate boundary are refined using a new set of significantly improved hypocenters, global centroid moment tensor (CMT) solutions, and high-resolution ... -
Basinal seamounts and seamount chains of the Central Indian Ocean: Probable near-axis origin from a fast-spreading ridge
(American Geophysical Union, 1994)Hydrosweep mapping of crust in the Central Indian Ocean Basin reveals abundant volcanoes occurring both as isolated seamounts and linear seamount chains parallel to flow lines. Their shapes, sizes and overall style of ... -
Evidence for hydrothermal activity in the Andaman Backarc Basin
(Current Science Association, Bangalore, India, 1996)Multibeam bathymetric, magnetic, gravity and seismic surveys revealed a complex morphotectonic fabric of the Andaman Backare Basin with a spreading ridge, several seamounts and faults. The ridge trending SW-NE direction ... -
Evidences for a volcanic province in the Central Indian Basin
(Geological Society of India, 1995)Based on various lines of evidence such as the widespread occurrence of basalts, pumice, volcanic glass shards and their transformational products (zeolites, palagonites, and smectite-rich sediments), we suggest the presence ... -
Morphology of an uncharted seamount from Central Indian Basin
(Elsevier, 1989)The morphology of a seamount at 12 degrees 35'S and 76 degrees 16'E is studied. This conical seamount has a maximum height of 1275 m (water depth 4135 m) and covers an area of about 189 sq km. The maximum basal extension ... -
New occurrence of Youngest Toba Tuff in abyssal sediments of the Central Indian Ocean
(Elsevier, 1999)Volcanic glass and pumice found in siliceous abyssal sediments of the Central Indian Basin, south of the Equator, have previously been assigned various origins including intra-basin volcanism, Indonesian arc, and Krakatau. ... -
Paleocene on-spreading-axis hotspot volcanism along the Ninetyeast Ridge: An interaction between the Kerguelen hotspot and the Wharton spreading center
(Indian Academy of Sciences, Bangalore, India, 1999)Investigations of three plausible tectonic settings of the Kerguelen hotspot relative to the Wharton spreading center evoke the on-spreading-axis hotspot volcanism of Paleocene (60-54 Ma) age along the Ninetyeast Ridge. ... -
Physical properties of a sediment core from the Central Indian Basin
(Indian Geophysical Union, 1998)A box core of 7.5 m was collected from the Central Indian Basin for the purpose of geotechnical studies and depthwise variation of physical properties and clay mineralogy. Water content, Atterberg limits, specific gravity ... -
Seafloor spreading magnetic anomalies in the southeastern Arabian Sea
(Elsevier, 1995)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 ... -
Seamounts - windows of opportunities and the Indian scenario
(Current Science Association, 2012)Seamounts are manifestations of crustal tectonics and volcanism, and are also sites of biodiversity and hydrothermal events. Although the population of seamounts is estimated to be in thousands, a large number of these ... -
Structure and isostatic compensation of the Comorin Ridge, north central Indian Ocean
(Royal Astronomical Society, 2008)Bathymetry, gravity and magnetic data (about 9200 l km) of the Comorin Ridge, north central Indian Ocean were investigated using the transfer function and forward model techniques to understand the mode of isostatic ... -
Structure and tectonics of the southwestern continental margin of India
(Elsevier, 1995)A NNW-SSE-trending graben in the inner shelf (40-60 m isobaths), a mid-shelf basement ridge (60-150 m isobaths), a shelf-margin basin (150-1000 m isobaths) and the Prathap Ridge Complex in the slope (1000-2000 m isobaths) ... -
Swath bathymetric investigation of the seamounts located in the Laxmi Basin, eastern Arabian Sea
(Elsevier, 1994)Multibeam (hydrosweep) swath bathymetric investigations revealed the presence of a NNW trending linear seamount chain along the axial part of the Laxmi Basin in the eastern Arabian Sea, between 15~'N, 70~'15'E and 17~'20'N, ... -
Synthesis of morphotectonics and volcanics of the Central Indian Ocean Basin
(Current Science Association, Bangalore, India, 1999)The Central Indian Ocean Basin (CIOB) is an enigmatic ocean basin in the young and tectonically complex Indian Ocean. Major tectonic and volcanic forms identified are fracture zones, abyssal hills, seamounts and ridges and ... -
Volcanogenic-hydrothermal iron-rich materials from the southern part of the Central Indian Ocean Basin
(Elsevier, 1999)Reported is the occurrences of magnetite-rich spherules, Ti-rich particles and possibly nontronite recovered at 19 degrees S and 76 degrees E from the pelagic clay in the Central Indian Ocean Basin (CIOB). It is proposed ...