A 51 ka sedimentary sequence in a seamount basin, Eastern Arabian Sea: Records for paleoceanographic and paleoclimate conditions
المؤلف | Neelavannan, Kannaiyan |
المؤلف | Hussain, Shaik Mohammad |
المؤلف | Sangode, Satish J. |
المؤلف | Prakasam, Muthusamy |
المؤلف | Sen, Indra Sekhar |
المؤلف | Veerasingam, Subramanian |
المؤلف | Tyagi, Abhishek |
المؤلف | Kumar, Pankaj |
المؤلف | Singh, Pramod |
تاريخ الإتاحة | 2022-02-20T06:35:16Z |
تاريخ النشر | 2022-04-01 |
اسم المنشور | Journal of Asian Earth Sciences |
المعرّف | http://dx.doi.org/10.1016/j.jseaes.2022.105086 |
الاقتباس | Kannaiyan Neelavannan, Shaik Mohammad Hussain, Satish J. Sangode, Muthusamy Prakasam, Indra Sekhar Sen, Subramanian Veerasingam, Abhishek Tyagi, Pankaj Kumar, Pramod Singh, A 51 ka sedimentary sequence in a seamount basin, Eastern Arabian Sea: Records for paleoceanographic and paleoclimate conditions, Journal of Asian Earth Sciences, Volume 226, 2022, 105086, ISSN 1367-9120, https://doi.org/10.1016/j.jseaes.2022.105086 |
الرقم المعياري الدولي للكتاب | 13679120 |
المعرّف | 105086 |
الملخص | A 5.4 m thick sediment core at ∼ 517 m water depth from a seamount basin off the Goa coast in the Eastern Arabian Sea (EAS) is examined for the mineral magnetic, carbonate and organic carbon variability. The 51 ka BP dated record is represented by Marine Isotope Stages (MIS) 3 to 1 under varying rates of sedimentation from 1.9 to 5.2 cm/ka. Comparison with records from adjacent cores for OC, TN, and CaCO3, this study indicates strong coupling of the seamount basin sedimentation with paleo-oceanographic conditions governed by southwest (SW) monsoon. The mineral magnetic parameters assigned three zones of variable paleo-oceanographic-paleoclimatic conditions marked by the interplay of high coercivity (oxidative) and low coercivity (reducing) mineralogy, that can be attributed to various factors including ocean ventilation governed by bottom water inflow of oxygen-depleted Sub-Antarctic Mode Waters and Antarctic Intermediate Water flows (SAMW-AAIW). This study emphasizes the significance of seamount basins as faithful recorders of long-term thermocline changes along with strong coupling to paleoceanographic conditions. |
راعي المشروع | The author K.N is grateful to the Department of Science and Tech- nology, Promotion of University Research and Scientific Excellence (DST-PURSE), for providing Junior Research Fellowship (JRF), File No. C.5/JRF-PURSE Phase II/ Geology /2014/655/ DT: 15.12.2014. |
اللغة | en |
الناشر | Elsevier |
الموضوع | Eastern Arabian Sea Marine Isotope Stage Off Goa Paleoceanographic Seamount basin |
النوع | Article |
رقم المجلد | 226 |
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