11 Result(s)
within
V Purnachandra Rao
Earth Sciences
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Article
Late Quaternary sediments on the carbonate platform off western India: Analogues of ancient platform carbonates
The Late Quaternary carbonate sediments and sedimentary rocks from the platform off western India were reviewed for their genesis and relationship with their ancient counter parts. Sub-marine cemented and vado...
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Article
Bathymetry and sediments on the carbonate platform off western India: Significance of Halimeda bioherms in carbonate sedimentation
Bathymetry across the carbonate platform off western India indicated small-size pinnacles and their lateral coalescence into 2 -6-m high mounds landward, and linear elongated carbonate ridges and troughs, moun...
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Article
Changes in depositional environment for the past 35 years in the Thane Creek, central west coast of India: inferences from REEs, metals and magnetic properties
The role of diagenetic processes in influencing the behaviour of metals (Fe, Mn, Cu, Ni, Zn), rare earth elements (REEs) and environmental magnetic parameters in two sediment cores from a polluted creek enviro...
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Article
Distribution and fractionation of rare earth elements and Yttrium in suspended and bottom sediments of the Kali estuary, western India
Concentrations of rare earth elements (REE) and yttrium (Y), and major metals (Al, Fe and Mn) were measured in suspended particulate matter (SPM) and bottom sediments of the Kali estuary, western India, for t...
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Article
Lime muds and their genesis off-Northwestern India during the late Quaternary
Two sediment types were found in five gravity cores collected from water depths between 56 m and 121 m along the northwestern continental margin of India: lime muds were abundant in the lower section while sil...
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Article
Temporal and spatial variability of trace metals in suspended matter of the Mandovi estuary, central west coast of India
Studies on the suspended particulate matter (SPM) in the Mandovi estuary, western India indicate that during the monsoon and pre-monsoon, the SPM increases, and the major and trace metals decrease from station...
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Article
Wind-driven estuarine turbidity maxima in Mandovi Estuary, central west coast of India
Systematic studies on the suspended particulate matter (SPM) measured on a seasonal cycle in the Mandovi Estuary, Goa indicate that the average concentrations of SPM at the regular station are ∼20mg/l, 5mg/l, ...
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Article
Origin of Cretaceous phosphorites from the onshore of Tamil Nadu, India
Cretaceous phosphorites from the onshore of Tamil Nadu have been investigated for their origin and compared with those in the offshore. Cretaceous phosphorites occur as light brown to yellowish brown or white ...
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Article
Late Quaternary sea level and environmental changes from relic carbonate deposits of the western margin of India
Relic carbonate deposits along the western margin of India occur as dolomite crusts, aragonite sands (pelletal / oolitic) and aragonite-cemented limestones, oyster shells, corals, encrusted coralline algal and...
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Article
Controls on organic carbon distribution in sediments from the eastern Arabian Sea Margin
Sediment cores from the upper continental slope of the eastern Arabian Sea have high organic carbon (OC), CaCO3, and sand content at the top. The values decrease with increasing depth in the Holocene and Upper P...
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Chapter
Phosphatic Rocks and Manganese Crusts from Seamounts in the EEZ of Kiribati and Tuvalu, Central Pacific Ocean
Phosphorite-manganese crusts were dredged from the flanks of seamounts of the Kiribati and Tuvalu EEZ (Exclusive Economic Zone) from water depths between 1450 and 2355 m. Samples from Kiribati consist of phosp...
