Search
Now showing items 1-10 of 22
Underwater geomorphology as a function of the variations in ferromanganese nodule characters in the Indian Ocean
(Current Science Association, 1989)
Ferromanganese nodules from three areas in the northern part of the Central Indian Ocean Basin have been studied. Statistical analysis shows significant variations in morphological and physical characters of nodules between ...
An interactive program for digitization of seabed photographs
(CSIR-NISCAIR, 1989)
A program for dignitization of seabed photographs to compute coverage and abundance of polymetallic nodules is developed. Since the objects in the seabed photograph are partially covered by thin sediment layer, the automatic ...
Ore grade manganese nodules from the central Indian basin: an evaluation
(1989)
Comparative studies on manganese nodules from two different areas (S and R) in the Central Indian Basin show distinct variations in their composition, grade (percent Ni + Cu), and abundance (kg/m2), which are explained in ...
Ferromanganese oxides from Mid-Indian ridge, seamounts and abyssal plains from the Indian Ocean
(CSIR-NISCAIR, 1989)
Mineralogical and chemical investigations show that todorokite is the only Mn mineral in the Mid-Indian Ridge ferromanganese, coatings, delta MnO2 in the seamount crusts, and well crystallised todorokite and minor amounts ...
Size analyses and geochemistry of ferromanganese nodules from the Central Indian Ocean Basin
(1989)
Ferromanganese nodules collected during the 13th cruise of the M.V. Skandi Surveyor in 1987 cover a very large area, 71 424 km super(2) in the Central Indian Ocean. The area consists of 13 nodule types, which are grouped ...
Influence of regional and local topography on the distribution of polymetallic nodules in Central Indian Ocean Basin
(Springer, 1988)
Detailed bathymetric surveys from part of the Central Indian Ocean revealed several bathymetric features such as hills, slopes, valleys, and plains. Areas with a local relief of a few to hundreds of meters generally have ...
Morphological and interlayer geochemical studies on manganese nodules from the southwestern Carlsberg ridge
(Elsevier, 1988)
Mixed facies of manganese nodules from the southwestern Carlberg Ridge have been analysed for Mn, Fe, Ni, Cu, Co and Zn. Seventy one analyses including the averages presented for outer layer, inner layer and near-core ...
Internal microfeatures of manganese nodules from the Central Indian Ocean
(Elsevier, 1988)
The internal features of manganese nodules from abyssal hills ranging in height from 600 to 880 m and the nodules from abyssal plains in the Central Indian Ocean have been studied. Nodules from the abyssal hills show mainly ...
Paleogene ichthyoliths from the substrates of ferromanganese encrustations and nuclei of manganese nodules from the Central Indian Basin
(Palaeontological Society of India, 1987)
Ichthyoliths, the phosphatic microscopic skeletal debris of the fishes are found in the substrates and the nuclei of ferromanganese encrustations and the nodules collected from the Central Indian Ocean Basin. About thirty ...
Mineralogy and chemistry of manganese nodules from the Southern part of Carlsberg Ridge
(Geological Society of India, 1985)
Petrographic study indicates that the nucleus of nodules is generally composed of clay, volcanic glass, basalt fragments, and earlier nodules. polished sections indicate typical collomorphic globular segregations and partly ...