Loubere, Paul; Chellappa, Rebecca (2008): Carbonate preservation in marine sediments [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.832507, Supplement to: Loubere, P; Chellappa, R (2008): Carbonate preservation in marine sediments: Mid to higher latitude quantitative proxies. Paleoceanography, 23(1), PA1209, https://doi.org/10.1029/2007PA001470
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Abstract:
Observations of carbonate preservation in marine sediments have long been used to infer changes in ocean circulation or biogenic production. When combined with measures of organic carbon rain and calcite accumulation rates, quantitative estimates of changes in preservation can reveal variation in biogenic fluxes, the org. C to calcite flux ratio and saturation state of bottom waters. Here we develop quantitative dissolution proxies for mid to higher latitudes based on foraminiferal test fragmentation. Examining surface sediments, we find that fragmentation in G. bulloides and G. truncatulinoides is linear with increasing seabed dissolution rate and can be used to quantify changes in carbonate preservation. G. truncatulinoides shows a constant relationship of fragmentation to dissolution. However, we observe that, although linear to dissolution rate, the fragmentation in G. bulloides depends on which morphotype is present. Other species, such as G. inflata, have complex responses to increasing dissolution and are less direct preservation indicators.
Coverage:
Median Latitude: -37.452915 * Median Longitude: -73.752376 * South-bound Latitude: -48.455000 * West-bound Longitude: -125.383000 * North-bound Latitude: -28.607000 * East-bound Longitude: -35.655000
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Loubere, P; Chellappa, R (2008): (Table 2) Planktonic species fragmentation counts for East Pacific Rise core top samples. https://doi.org/10.1594/PANGAEA.832506
- Loubere, P; Chellappa, R (2008): (Table 1) Planktonic species fragmentation counts for Rio Grande Rise core top samples. https://doi.org/10.1594/PANGAEA.832505