99654 artpubuab driver oai:ddd.uab.cat:99654 doi 10.1344/105.000001758 articleid 16965728v10n3p295 eng Iyer, S.D. National Institute of Oceanography (Council of Scientific & Industrial Research) Seamounts. Characteristics, formation, mineral deposits and biodiversity Seamounts represent crust-mantle activities and are areas of petrological deviations, biodiversity, seismicity and hydrothermal events. An estimated ~50 million tons/year of basalts are required to produce seamounts suggesting intense oceanic volcanism. Seamounts either occur as chains perpendicular to the ridge or as isolated entities or in clusters. Seamounts may host basalts, hyaloclastites, gabbros and serpentinites and these variants perhaps evolve from multiple melting domains as a consequence of large-scale thermal structure and mantle lithology. Nonhotspot seamounts on a young, thin and hot lithosphere host tholeiites whereas the plume related ones on thick, older lithosphere may be either tholeiitic or alkaline. Seamounts may bear hydrothermal deposits (Fe, Mn, Co) rare metals and phosphorites. The resistance of seamounts to subduction could trigger slides; while shearing of seamounts buried in subduction zones leads to seismicity, both of which could cause tsunamis. Seamounts greatly affect the circulation patterns and currents, which in turn influence the surrounding biota. We review here the seamounts in terms of discovery, characteristics, distribution and their influence on the marine environment. Tots els drets reservats http://www.europeana.eu/rights/rr-f/ Anglès Article de fons Seamounts Distribution Origin Influence on Marine Systems info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Mehta, C.M. Oil and Natural Gas Comissions Das, P. National Institute of Oceanography (Council of Scientific & Industrial Research) Kalangutkar, N.G. National Institute of Oceanography (Council of Scientific & Industrial Research) Vol. 10, Núm. 3 (setembre 2012), p. 295-308 Geologica acta 1696-5728 14 2024658 http://ddd.uab.cat/pub/geoact/geoact_a2012m9v10n3/geoact_a2012m9v10n3p295.pdf 0295 308 setembre 3 10 geoact_a2012m9v10n3 2012 ARTPUB GEOACT UAB file 0 MD5 97de4ed97f6d89b8c50a6b5aaabc4a33 2024658 PDF 1.4 filepath pub/geoact/geoact_a2012m9v10n3/geoact_a2012m9v10n3p295.pdf disk