2009
DOI: 10.1016/j.sedgeo.2008.11.004
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Multiproxy approach for determination of nature and origin of carbonate micro-particles so-called “micarb” in pelagic sediments

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Cited by 27 publications
(13 citation statements)
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“…[], following the definition of Beltran et al . []. Although some biogenic foraminiferal fragments contribute to the noncoccolith calcite (Figure b), most of the noncoccolith calcite consists of the unrecognizable <2 μm fragments (Figure ).…”
Section: Discussionmentioning
confidence: 99%
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“…[], following the definition of Beltran et al . []. Although some biogenic foraminiferal fragments contribute to the noncoccolith calcite (Figure b), most of the noncoccolith calcite consists of the unrecognizable <2 μm fragments (Figure ).…”
Section: Discussionmentioning
confidence: 99%
“…The <2 μm fragments could be disintegrated hetero‐ and/or holococcoliths [ Bown et al ., ] or abiotic/diagenetic calcite, although this cannot be confirmed without comprehensive analyses as presented in Beltran et al . []. If these particles were formed as micritic cements from cold pore waters during early diagenesis, or disintegrated holococcoliths that underwent recrystallization during early diagenesis in bottom water temperatures, the resulting contribution of material with higher (colder) Δ 47 to the overall sample could account for the offset between Δ 47 ‐ and U37k'‐based SSTs.…”
Section: Discussionmentioning
confidence: 99%
“…These finest fractions are dominated by small coccoliths such as those of Emiliania huxleyi and Gephyrocapsa oceanica. However, the isotopic composition of this size fraction has proven to be difficult to interpret for old and potentially diagenetically altered sediments due to the relatively high abundance of the so-called micarbs that derive from coccolith fragmentation or correspond to diagenetic precipitations (Minoletti et al, 2004;Minoletti et al, 2005;Beltran et al, 2009;Hermoso et al, 2009). In contrast, the size fractions bracketing 5 µm usually offer the opportunity to generate isotopic measurements free of micarbs and foraminiferal fragments.…”
Section: Oxygen Isotope Composition and 18 O F Ractionation In Sedimentsmentioning
confidence: 99%
“…Further calcareous nannofossil biostratigraphic study by Del Panta (1995) resulted in reassignment to an early Maastrichtian age, a conclusion that is refined in this study. A geochemical analysis of one calcareous marl couplet at the base of the section performed by Beltran et al (2009) shows some contribution of allocthonous components in carbonate micro-particles.…”
Section: Figmentioning
confidence: 99%