(Table 2) B/Ca, d11B, Mg/Ca and d18O record for ODP Hole 130-806B samples
Cobertura |
LATITUDE: 0.318500 * LONGITUDE: 159.361000 * DATE/TIME START: 1990-02-18T21:00:00 * DATE/TIME END: 1990-02-23T01:30:00 * MINIMUM ELEVATION: -2519.9 m * MAXIMUM ELEVATION: -2519.9 m |
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Data(s) |
08/01/2003
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Resumo |
We present the first continuous records from 0 to 5 Ma (in 0.333 m.y. integrated time steps) of paired boron/calcium (B/Ca) ratios and boron isotopes (d11B) in the planktonic foraminifera Globogerinoides sacculifer (without sacc) from a site in the western equatorial Pacific Ocean (Ocean Drilling Program Site 806). These measurements, the first made in conjunction with calcification temperature (magnesium/calcium ratios) and average shell mass measurements, indicate that pH is not the sole environmental variable controlling B in planktonic foraminiferal calcite. Our data are consistent with calcification temperature exerting a primary control on B concentration and isotopic composition in planktonic foraminifera. If so, calcification temperature must be taken into account if pH for past oceans and atmospheric pCO2 are to be estimated from B isotope measurements in foraminiferal calcite. Doing so will substantially increase the uncertainty of pH estimates. Although this work was designed as a temporal study, its results define new aspects of calibrating the d11B paleo-pH tracer. |
Formato |
text/tab-separated-values, 141 data points |
Identificador |
https://doi.pangaea.de/10.1594/PANGAEA.841348 doi:10.1594/PANGAEA.841348 |
Idioma(s) |
en |
Publicador |
PANGAEA |
Relação |
Berger, Wolfgang H; Bickert, Torsten; Schmidt, Heike; Wefer, Gerold (1993): Quaternary oxygen isotope record of pelagic foraminifers: Site 806, Ontong Java Plateau. In: Berger, WH; Kroenke, LW; Mayer, LA; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 130, 381-395, doi:10.2973/odp.proc.sr.130.023.1993 Mayer, Larry A; Jansen, Eystein; Backman, Jan; Takayama, Toshiaki (1993): Climatic Cyclicity at Site 806: The GRAPE Record. In: Berger, WH; Kroenke, LW; Mayer, LA; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 130, 623-639, doi:10.2973/odp.proc.sr.130.046.1993 |
Direitos |
CC-BY: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted |
Fonte |
Supplement to: Wara, Michael W; Delaney, Margaret Lois; Bullen, Thomas D; Ravelo, Ana Christina (2003): Possible roles of pH, temperature, and partial dissolution in determining boron concentration and isotopic composition in planktonic foraminifera. Paleoceanography, 18(4), 1100, doi:10.1029/2002PA000797 |
Palavras-Chave | #130-806B; AGE; Age, maximum/old; Age, minimum/young; DRILL; Drilling/drill rig; Globigerinoides sacculifer, Boron/Calcium ratio; Globigerinoides sacculifer, d11B; Globigerinoides sacculifer, d18O; Globigerinoides sacculifer, Magnesium/Calcium ratio; Globigerinoides sacculifer, weight; ICP-MS, Inductively coupled plasma - mass spectrometry; Isotope ratio mass spectrometry; Joides Resolution; Leg130; Negative-thermal ionization mass spectrometry (N-TIMS); North Pacific Ocean; Ocean Drilling Program; ODP; ODP sample designation; Sample code/label; Sample code/label 2; Weighted |
Tipo |
Dataset |