(Table 1) 87Sr/86Sr and Sr/Ca ratios in foraminiferal calcite from DSDP Holes 3-21 and 39-357
Cobertura |
MEDIAN LATITUDE: -29.294600 * MEDIAN LONGITUDE: -33.078650 * SOUTH-BOUND LATITUDE: -30.004200 * WEST-BOUND LONGITUDE: -35.559800 * NORTH-BOUND LATITUDE: -28.585000 * EAST-BOUND LONGITUDE: -30.597500 * DATE/TIME START: 1969-01-15T00:00:00 * DATE/TIME END: 1974-11-23T00:00:00 * MINIMUM DEPTH, sediment/rock: 1.0 m * MAXIMUM DEPTH, sediment/rock: 476.5 m |
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Data(s) |
21/09/1985
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Resumo |
The 87Sr/86Sr ratio of ancient seawater, as recorded in marine carbonates, is an important tracer of long-term variations in ocean chemistry (Burke et al., 1982, doi:10.1130/0091-7613(1982)10<516:VOSSTP>2.0.CO;2; Peterman et al., 1970, doi:10.1016/0016-7037(70)90154-7; Dasch and Biscaye, 1971, doi:10.1016/0012-821X(71)90164-6; Veizer and Compston, 1974, doi:10.1016/0016-7037(74)90099-4; Brass, 1976, doi:10.1016/0016-7037(76)90025-9). However, the Sr isotope balance of the oceans has been difficult to constrain; consequently, attempts to evaluate the temporal 87Sr/86Sr changes have been largely qualitative. To constrain the causes of these variations we have measured 87Sr/86Sr ratios in carefully cleaned unrecrystallized foraminifera from DSDP sites 21 and 357. The data presented here have been quantitatively modelled taking advantage of recent advances in understanding of the Sr geochemical cycle. They suggest that whereas hydrothermal fluxes and carbonate recycling are of major importance in defining the marine 87Sr/86Sr ratio, the major control over its variations through the Cenozoic has been changes in the isotope composition of Sr derived from the weathering of silicate rocks. |
Formato |
text/tab-separated-values, 54 data points |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.770027 doi:10.1594/PANGAEA.770027 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Palmer, Martin R; Elderfield, Henry (1985): Sr isotope composition of sea water over the past 75 Myr. Nature, 1985(6011), 526-528, doi:10.1038/314526a0 |
Palavras-Chave | #3-21; 39-357; AGE; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Leg3; Leg39; South Atlantic/CONT RISE; Strontium/Calcium ratio; Strontium 87/Strontium 86, error; Strontium 87/Strontium 86 ratio |
Tipo |
Dataset |