Browsing by Subject "GEOLOGY AND GEOPHYSICS"
Now showing items 1-20 of 111
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A comparison of Mg/Ca ratios in Globigerinoides ruber (white): sensu stricto versus a mixture of genotypes
(Geological Society of India, 2016)Mg/Ca ratios were measured in core AAS9/21 from the eastern Arabian Sea (EAS), on two sets of planktonic foraminifera, one with a mixture of Globigerinoides ruber genotypes (sensu stricto and sensu lato) and the second ... -
A note on chemical composition and origin of ferromanganese oxide coated and uncoated pumice samples from central Indian Ocean basin
(Geological Society of India, 2016)Pumice are explosive volcanic product, occur as uncoated or coated with ferromanganese (Fe-Mn) oxide and resides in association with ferromanganese nodules on the seabed in Central Indian Ocean Basin (CIOB). The older Fe-Mn ... -
A seismotectonic study of the 21 May 2014 Bay of Bengal intraplate earthquake: Evidence of onshore-offshore tectonic linkage and fracture zone reactivation in the northern Bay of Bengal
(Springer, 2015)The earthquake of 21 May 2014 (Mw 6.0) in the northern Bay of Bengal (BOB) highlights the importance of studies on intraplate earthquakes in the oceanic regime for understanding the stress state of the oceanic lithosphere. ... -
A tectonic model reconciling evidence for the collisions between India, Eurasia and intra-oceanic arcs of the central-eastern Tethys
(Elsevier, 2015)Despite several decades of investigations, inferences on the timing and nature of collisions along the Mesozoic–Cenozoic Eurasian margin remain controversial. We assimilate geological and geophysical evidence into a plate ... -
Acoustic reflections in the water column of Krishna-Godavari offshore basin, Bay of Bengal
(Acoustical Society of America, 2016)Seismic oceanographic studies from various oceans worldwide have indicated that the acoustic reflections are mostly observed along thermal boundaries within the water column. However, the authors present a case study of ... -
An appraisal of biological responses and network of environmental interactions in non-mining and mining impacted coastal waters
(Springer, 2015)The coastal waters of Goa and Ratnagiri lying on the West coast of India are influenced by terrestrial influx. However, Goa is influenced anthropogenically by iron-ore mining, while Ratnagiri is influenced by deposition ... -
Assessing the suitability of benthic foraminiferal morpho-groups to reconstruct paleomonsoon from Bay of Bengal
(Indian Academy of Sciences, 2016)Temporal changes in benthic foraminiferal morpho-groups were suggested as an effective proxy to reconstruct past monsoon intensity from the Arabian Sea. Here, in order to test the applicability of temporal variation in ... -
Assessment of existing sediment transport models for sand barrier dynamics under wave and currents
(IAHR-AIRH, 2014)The paper summarizes morphology changes over rippled sand barriers under wave and wave combined current of 27 laboratorial experiments. Data of 4 wave conditions (H=10cm, T=1s; H=12cm, T=1s; H=12cm, T=1.5s; H=14cm, T=1.5s) ... -
Baseline geophysical data for hazard management in coastal areas in relation to earthquakes and tsunamis
(Sage Publication, 2016)A systematic study of geophysical data of the Eastern Continental Margin of India was taken up to identify the land-ocean tectonic lineaments over the east coast of India and the possible neotectonic activity associated ... -
Basement configuration of KG offshore basin from magnetic anomalies
(Indian Academy of Sciences, 2016)Marine magnetic anomalies along three representative profiles falling between shelf break and continent-ocean boundary in the offshore Krishna-Godavari basin were quantitatively interpreted for understanding the nature and ... -
Biochemical and stable carbon isotope records of mangrove derived organic matter in the sediment cores
(Springer, 2016)Core sediments from five mangrove ecosystems along northern Kerala Coast were collected to evaluate the nature and sources of organic matter in these ecosystems. General sedimentary parameters (pH, Eh, grain size and total ... -
Boninitic metavolcanic rocks and island arc tholeiites from the Older Metamorphic Group (OMG) of Singhbhum Craton, eastern India: Geochemical evidence for Archean subduction processes
(Elsevier, 2015)The metavolcanic rocks of the Paleo-Mesoarchean Older Metamorphic Group (OMG) from Jagannathpur area of the Singhbhum Craton occur as enclaves within the Singhbhum granites (SBG). The primary mineralogical composition of ... -
Characteristics of long-period swells measured in the near shore regions of eastern Arabian Sea
(Elsevier, 2016)Measured wave data covering two years simultaneously at 3 locations along the eastern Arabian Sea reveals the presence of long-period (peak wave period > 18 s) low-amplitude waves (significant wave height < 1 m) and the ... -
Characteristics of shallow water waves off the central west coast of India before, during and after the onset of the Indian summer monsoon
(Elsevier, 2015)We studied the wave characteristics before, during and after the onset of the Indian summer monsoon based on data measured using the buoy moored at 3 locations off the central west coast of India. The study reveals the ... -
Classification of tidal inlets along the Central east coast of India
(Elsevier, 2015)Coastal inlets are the openings along the coastline that provide a linkage between the open ocean and the hinterland water bodies. These coastal inlets are varied in nature depending on many influencing parameters such as ... -
Classification of tidal inlets along the central west coast of India
(Elsevier, 2015)Tidal inlets along the Maharashtra coast on the central west coast of India were classified according to three methods available in the literature. Two classification methods viz., (i) Hydrodynamic classification (Hayes, ... -
Coarse fraction components in a red-clay sedimemt core, Central Indian Ocean Basin: Their occurrence and significance
(Indian Association of Sedimentologists, 2012)Coarse Fractions Components of a sediment core (268 cm from a water depth of 5120 m) collected at 18 degrees S and 80 degrees E from the red clay domain in the Central Indian Ocean Basin (CIOB), comprises mineral grains, ... -
Coastal placer minerals
(NISCAIR Publications, 2014)India is blessed with a long coastline of more than 7500 km, including islands. The erosion of rocks results in coastal placer minerals, which find many applications. -
Controls on ferromanganese crust composition and reconnaissance resource potential, Ninetyeast Ridge, Indian Ocean
(Elsevier, 2016)A reconnaissance survey of Fe–Mn crusts from the 5000 km long (~31°S to 10°N) Ninetyeast Ridge (NER) in the Indian Ocean shows their widespread occurrence along the ridge as well as with water depth on the ridge flanks. ... -
Crustal accretion at a sedimented spreading center in the Andaman Sea
(Geological Society of America, 2016)The magmatic, tectonic, and hydrothermal processes forming the oceanic crust along mid-ocean spreading centers are strongly modified at sedimented spreading centers but poorly understood owing to the lack of good crustal ...