Trace elements in ferromanganese nodules from the central indian ocean basin

Pattan, J.N.; Parthiban, G.; Amonkar, Ankeeta; Shaikh, Sufiyan A.; Sankar, Syam

doi:10.1080/1064119x.2017.1297878

Cited by 8 publications

(3 citation statements)

References 41 publications

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“…The bulk chemical composition of nodules from the CCZ is uniform across the whole region according to analyses of more than 300 nodules, all pointing to a mixed-type genesis, with variable influence of hydrogenetic and diagenetic precipitation [25,39]. Bulk analysis of nodules from the CIB show a predominant hydrogenetic origin with variable proportions of diagenetic input [22]. Bulk analysis of nodules from the MB on small, spheroidal, Fe-Co-REE-rich nodules with a smooth surface show typical characteristics of hydrogenetic nodules [21,41].…”

Section: Samplesmentioning

confidence: 99%

“…Three classes of Fe-Mn nodules have been recognized: hydrogenetic, diagenetic and mixed-type. Hydrogenetic nodules derive all elements from oceanic bottom waters, whereas diagenetic nodules derive elements from redox cycling during early diagenetic reactions of organic matter in the sediment [19][20][21][22][23]. The transition from diagenetic to hydrogenetic processes depends on the redox conditions in the environment of formation [11,19,24], including the depth of the oxic/suboxic redox front (OSF) in the sediment.…”

Section: Introductionmentioning

confidence: 99%

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Integrated Geochemical and Morphological Data Provide Insights into the Genesis of Ferromanganese Nodules

et al. 2018

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Ferromanganese nodules grow by precipitation of metals from seawater and/or sediment pore water. The formation of different genetic types depends on the composition and redox conditions of the water and upper sediment layers, water depth, and primary productivity in surface waters. Many characteristics of nodules have been used to investigate their genesis. In this paper, we compare nodules from different environments using Computed Tomography, Scanning Electron Microscopy-Energy Dispersive X-ray Spectroscopy, and Micro X-ray Fluorescence data to better understand how geochemical differences are linked to different morphological features. We use representative samples of purely hydrogenetic nodules and mixed-type nodules with various proportions of hydrogenetic and diagenetic growth laminae. Our results show a micrometric alternation between high-absorbance massive Mn-enriched (Mn/Fe up to 40) laminae and low-absorbance dendritic Mn-depleted (Mn/Fe about 1) laminae in mixed-type nodules, suggesting the rhythmic alternation of hydrogenetic oxic conditions and suboxic diagenetic input. This micro-rhythmic alternation is absent in purely hydrogenetic nodules, which are homogenous both chemically and morphologically. A conceptual model is proposed to account for these geochemical and morphological differences in terms of the vertical migration of the oxic-suboxic front relative to the base of the nodules.

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Section: Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Integrated Geochemical and Morphological Data Provide Insights into the Genesis of Ferromanganese Nodules

et al. 2018

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“…The of 850 nodules from 234 sites reveals an inverse relationship between the nodule size and (Cu+Ni+Co %), and among the different sizes, small to medium sized nodules have high grade of combined Cu+Ni+Co [21]. The buried nodules from siliceous ooze area suggest their formation under hydro genetic and diagenetic processes, whereas those from hydro genetic origin [22].…”

Section: Polymetallic Nodule Exploration At Ciobmentioning

confidence: 99%

Deep ocean mineral exploration in the Indian Ocean using Remotely Operated Vehicle (ROSUB 6000)

Ramadass

Ramesh

Subramanian

et al. 2015

2015 IEEE Underwater Technology (UT)

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Deep water missions for carrying out diverse scientific investigations and mineral resource exploration have been in progress for more than five decades in India, using indirect and direct measurement devices. Most of the studies are focused on marine biological, chemical, geological, geophysical and physical oceanographic observations, by utilizing sampling gears and measurement devices from ship board systems, and aimed at resource identification, and ecological, paleooceanographic and paleo-climatic studies. Visually investigating the deep ocean basin is a challenging exercise and many scientific investigations by direct observations had brought out some very exciting discoveries from different ocean basins. To cater to the need of the ocean community in India, a 6000 m depth rated Remotely Operated Vehicle ROSUB 6000, has been developed at the National Institute of Ocean Technology. This paper explains the system's engineering concepts, and the outcome of deep sea mineral exploration expeditions, conducted using the ROSUB 6000 for gas hydrates' exploration in the Krishna Godavari Basin in the Bay of Bengal, polymetallic manganese nodules in the Central Indian Ocean Basin, and hydrothermal sulphides at the Central Indian Ridge in the Southern Indian Ocean near the Rodriguez Triple Junction.

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The Tafak manganese deposit (Dursunbey-Balıkesir, NW Turkey): implications for the submarine hydrothermal origin of İzmir-Ankara-Erzincan Neotethyan Ocean

Aydoğan

2021

Arab J Geosci

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Trace elements in ferromanganese nodules from the central indian ocean basin

Cited by 8 publications

References 41 publications

Integrated Geochemical and Morphological Data Provide Insights into the Genesis of Ferromanganese Nodules

Integrated Geochemical and Morphological Data Provide Insights into the Genesis of Ferromanganese Nodules

Deep ocean mineral exploration in the Indian Ocean using Remotely Operated Vehicle (ROSUB 6000)

The Tafak manganese deposit (Dursunbey-Balıkesir, NW Turkey): implications for the submarine hydrothermal origin of İzmir-Ankara-Erzincan Neotethyan Ocean

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