Browsing Scholarly literature by Subject "ferromanganese nodules"
Now showing items 21-40 of 96
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Contrast in manganese nodule distribution on either side of 79~'E fracture zone in central Indian Basin
(Taylor and Francis, 1994)Seabed topography is one of the prime factors in controlling the distribution of manganese nodules. Study of the nodule abundance on either side of the 79~'E fracture zone in the Central Indian Basin (idenfitied from ... -
Deep-sea impact experiments and their future requirements
(Taylor and Francis, 2005)In recent years, several experiments to assess the potential impacts due to deep-sea mining in the Pacific as well as the Indian Oceans have indicated the immediate changes and restoration patterns of environmental conditions ... -
Deep-sea mining: Economic, technical, technological, and environmental considerations for sustainable development
(Marine Technology Society, 2011)Mining of minerals such as polymetallic nodules from the deep-sea floor has been "on-hold" as a result of several factors such as current availability of Cu, Ni, Co and Mn from terrestrial sources and their fluctuating ... -
Deep-sea polymetallic nodule mining: Challenges ahead for technologists and environmentalists
(Taylor and Francis, 2003)Although, offshore mining for mineral wealth is not required at present, it may be the only alternative in the future due to the continuous growing demand for certain metals that have no or limited land deposits. Risk ... -
Distribution of deep-sea benthos in the proposed mining area of Central Indian Basin
(Taylor and Francis, 2000)During the first stage of the project work on the Indian Deep-Sea Environment Experiment (INDEX), the abundance and distribution of deep-sea benthos were surveyed in the Central Indian Basin for the collection of baseline ... -
Distribution of manganese nodules, rocks and sediments in the Central Indian Ocean Basin: Factors influencing performance of mining system
(Publ. and Inf. Dir., New Delhi, India, 1994)Manganese nodule abundances in the Central Indian Ocean Basin (CIOB) as noted from seabed photographs (nil to 18.4 kg/m sup(2)) and grabs (nil to 21.5 kg/m sup(2)) are variable. The relative abundance varies from zero to ... -
Distribution pattern and morphochemical relationships of manganese nodules from the Central Indian Basin
(Springer, 2001)In the Central Indian Basin manganese nodule abundance was variable in all sediment types. Mean abundance varied from 1.5 in calcareous ooze to 10.2 kg/m sup(2) in terrigenous-siliceous ooze sediments. Nodule grade and ... -
Effect of benthic disturbance on geotechnical characteristics of sediments from nodule mining area in the Central Indian Basin
(International Society of Offshore and Polar Engineers, Cupertino, CA (USA), 1999)Benthic disturbance is carried out in the Central Indian Basin for environmental impact assessment studies. Geotechnical measurements were made on sediments collected before and after disturbing the top 10-15 cm of the ... -
Effect of sediment-water interface 'boundary layer' on exposure of nodules and their abundance: a study from seabed photos
(Geological Society of India, 1989)The results obtained from seabed photos and boomerang grab samples reveal a striking similarity in distribution patterns of size classes of polymetallic nodules. Due to partial sediment cover, there is a 'fractionation' ... -
Environment and deep-sea mining: A perspective
(Taylor and Francis, 2000)As the quest for deep-sea mineral resources is gaining momentum, environment and ocean mining have become important aspects of study. Because many of these deposits occur in international waters, the concern for environmental ... -
Environmental studies for mining of deep-sea polymetallic nodules - Accomplishments and future plans
(Regional Research laboratory, Bhubaneswar, 2005)Environmental studies for mining of deep-sea polymetallic nodules were initiated to evaluate the possible impacts of mining on benthic environment and develop protocols for environmental studies, to fulfill one of the ... -
Evidence for the formation of different-sized nodules by different accretionary processes
(Taylor and Francis, 1993)Studies on different-sized polymetallic nodules from the Central Indian Ocean Basin reveal that chemical composition is largely related to the nodule diameter which show systematic decrease in Mn, Cu, and Ni content with ... -
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 ... -
Exploration for nodules in the Central Indian Ocean Basin: Past present and the future
(Regional Research laboratory, Bhubaneswar, 2005)The Polymetallic Nodules Project has a long (less than 2 decades)history. Initially, the Surveys and Exploration aspect was the driving force for this project. The project was initiated with the recovery of manganese nodules ... -
Ferro-manganese encrustation on the tympanic bulla of a minke whale from Central Indian Ocean Basin
(CSIR-NISCAIR, 1987)Ear bone of a minke whale (Balaenoptera acutorostrata) was collected from 5200 m water depth with thin coating of Fe-Mn oxide on its surface. The Fe-Mn coating material was similar in nature and ratios Mn/Fe and Cu + Ni/Co ... -
Ferromanganese micronodules from Bengal Fan
(Museo Geologico di Bologna, 1993)The occurrence of ferromanganese micronodules, hitherto unreported from any fan-valley system of the world, has been recorded from over 0.22 million km sup(2) area located in the middle fan region of the Bay of Bengal. ... -
Ferromanganese nodules and their associated sediments from the Central Indian Ocean Basin: Rare earth element geochemistry
(Taylor and Francis, 2001)The rare earth element (REE) distribution in nine deep-sea ferromanganese nodules and their associated siliceous sediments from the Central Indian Ocean Basin (CIOB) have been studied to elucidate the REE relationship among ... -
Ferromanganese nodules from the Central Indian Ocean Basin
(CRC Press, USA, 2000)In order to delineate a mine site for ferromanganese nodules, extensive surveys were conducted in Central Indian Ocean Basin. Mapping of the basin by multibeam swath bathymetry (Hydrosweep) has revealed many new bottom ... -
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 ... -
Ferromanganese oxides on sharks' teeth from Central Indian Ocean Basin
(Council of Scientific and Industrial Research, New Delhi, 1999)The mineralogy, composition and growth rates of ferromanganese (Fe-Mn) oxides over the sharks' teeth from the Central Indian Ocean Basin are presented. The trends of metal enrichment (Mn, Ni, Cu and Zn) and depletion (Fe ...