dc.contributor.author | Linsy, P. | |
dc.contributor.author | Nath, B.N. | |
dc.contributor.author | Mascarenhas-Pereira, M.B.L. | |
dc.contributor.author | Chauhan, T. | |
dc.contributor.author | Sebastian, T. | |
dc.contributor.author | PrakashBabu, C. | |
dc.contributor.author | Kurian, S. | |
dc.contributor.author | Miriyala, P. | |
dc.contributor.author | Kazip, A. | |
dc.contributor.author | Borole, D.V. | |
dc.contributor.author | Khadge, N.H. | |
dc.date.accessioned | 2019/03/31 | |
dc.date.accessioned | 2019-04-30T12:44:18Z | |
dc.date.available | 2018/11/01 | |
dc.date.available | 2019-04-30T12:44:18Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Journal of Geophysical Research: Oceans, vol.123(11); 2018; 7963-7982 | |
dc.identifier.issn | 2169-9275 | |
dc.identifier.uri | https://doi.org/10.1029/2018JC014386 | |
dc.identifier.uri | http://drs.nio.org/drs/handle/2264/8000 | |
dc.description.abstract | A regional solid-phase phosphorus (P) speciation study in the Central Indian Basin (CIB) was carried out to elucidate the spatial distribution of sedimentary P species and P diagenesis in an oligotrophic setting. The results show that P enrichment is in the order of biogenic (P-bio) > authigenic (P-auth) > iron bound (P-Fe) > detrital (P-det) > organic (P-org) P. The higher concentrations of P-bio are found in siliceous oozes, which are attributed to high biological productivity in the overlying waters compared to pelagic clay region. High P-auth and P-det contents with low molar C-org/P-react ratios in the pelagic/red clays indicate the deposition of calcium fluorapatite and refractory material from the atmospheric input. The oxygenated bottom water promotes adsorption of P onto iron oxyhydroxides making the P-Fe an important sink. Remobilization of P within the sediments is limited because of well-oxygenated conditions and an efficient adsorption by iron oxyhydroxides and clay-sized sediments. A twofold increase in P-total and P-species is observed in hydrothermally altered, ferruginous sediments from a seamount flank suggesting an important role of hydrothermal processes in P cycling. The calculated P accumulation rate in the present study ranges between 0.6 and 11.7 μmol cm-2 kyr-1. The burial flux of P for the entire CIB (5.7 x 106 km2) is 0.01 x 1010 mol P per year which accounts for 0.05% of the global flux. The benthic P fluxes from the seawater to the sediments in the area range between 0.0093 and 0.133 μmol cm-2 kyr-1 indicating that the CIB sediments are an important sink for P. | |
dc.language | en | |
dc.publisher | John Wiley & Sons | |
dc.relation.isreferencedby | SCI | |
dc.title | Distribution and Diagenesis of Phosphorus in the Deep-Sea Sediments of the Central Indian Basin | |
dc.type | Journal Article | |
dc.affiliation.author | CSIR-National Institute of Oceanography, Dona Paula, Goa, India | |