Late Pleistocene sediment record of the Maldives carbonate platform
Cobertura |
LATITUDE: 4.262160 * LONGITUDE: 73.245830 * DATE/TIME START: 2007-12-04T03:39:00 * DATE/TIME END: 2007-12-04T03:39:00 |
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Data(s) |
05/05/2012
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Resumo |
A piston core from the Maldives carbonate platform was investigated for carbonate mineralogy, grain-size distributions, calcium carbonate content and organic carbon. The sedimentary record was linked to Late Pleistocene sea-level variations, using an age model based on oxygen isotopes obtained from planktonic foramanifera, nannofossil biostratigraphy and 14C age determinations. The correlation between the sedimentary record and Late Pleistocene sea-level showed that variations in aragonite and mud during the past 150 000 years were clearly related to flooding and sea floor exposure of the main lagoons of the atolls of the Maldives carbonate platform. Platform flooding events were characterized by strongly increased deposition of aragonite and mud within the Inner Sea of the Maldives. Exposure events, in contrast, can be recognized by rapid decreases in the values of both proxy records. The results show that sediments on the Maldives carbonate platform contain a continuous record of Pleistocene sea-level variations. These sediments may, therefore, contribute to a better understanding of regional and even global sea-level changes, and yield new insights into the interplay between ocean currents and carbonate platform morphology. |
Formato |
application/zip, 5 datasets |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.832252 doi:10.1594/PANGAEA.832252 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Paul, Andreas; Reijmer, John J G; Fürstenau, Jörn; Kinkel, Hanno; Betzler, Christian G (2012): Relationship between Late Pleistocene sea-level variations, carbonate platform morphology and aragonite production (Maldives, Indian Ocean). Sedimentology, 59(5), 1640-1658, doi:10.1111/j.1365-3091.2011.01319.x |
Palavras-Chave | #<63 µm; >63 µm; Aragonite; Arg; CaCO3; Calcium carbonate; Calculated; Carbon, organic, total; Carbon, total; d13C carb; d18O carb; delta 13C, carbonate; delta 18O, carbonate; Depth; DEPTH, sediment/rock; G. ruber d13C; G. ruber d18O; Globigerinoides ruber, d13C; Globigerinoides ruber, d18O; High magnesium calcite; HMC; Inorganic carbon (IC) = Total Carbon (TC) - Total Organic Carbon (TOC), CaCO3 = IC*8.3333; LMC; Low magnesium calcite; M74/4; M74/4_1096-1; M74/4-1095-KL; Meteor (1986); NEOMA: The Neogene of the Maldives; PC; Piston corer; Size fraction < 0.063 mm, mud, pelite, silt+clay; Size fraction > 0.063 mm, sand; TC; TOC; vs. VPDB; X-ray diffraction (XRD) |
Tipo |
Dataset |