Serial Mg/Ca and Sr/Ca chronologies across single benthic foraminifera tests

被引：12

作者：

Allison, Nicola ^{[1
]}

Austin, William E. N. ^{[1
]}

机构：

[1] Univ St Andrews, Sch Geog & Geosci, St Andrews KY16 9AL, Fife, Scotland

来源：

CHEMICAL GEOLOGY | 2008年 / 253卷 / 1-2期

基金：

英国自然环境研究理事会;

关键词：

foraminifera; Mg/Ca; Sr/Ca; SIMS;

D O I：

10.1016/j.chemgeo.2008.04.010

中图分类号：

P3 [地球物理学]; P59 [地球化学];

学科分类号：

0708 ; 070902 ;

摘要：

We used secondary ion mass spectrometry (SIMS) to analyse Mg/Ca and Sr/Ca across four individual tests of the benthic foraminifera Hyalinea balthica, collected 'live' from a site on the NW European shelf with seasonal variations in bottom water temperature (>4 degrees C). Test growth is episodic and we have produced chronologies of Mg/Ca and Sr/Ca variations between consecutive chambers. Chronologies do not Correlate well between replicate specimens although in one case the seasonal Mg/Ca trend is in reasonable agreement with estimated seawater temperature variations. We also observe significant intra-chamber hetereogeneity even within the outermost test chamber which is deposited nominally as a single event and has not been thickened during the addition of subsequent chambers. Mg/Ca and Sr/Ca also vary significantly between tests of similar size which were collected at the same time. SIMS can be used to analyse single specimens from sediment samples in which foraminifera are rare or to selectively target pristine calcite in diagenetically altered individuals. Our observation that Mg and Sr can vary significantly between foraminifera tests of the same size indicates a potential pitfall of this approach. (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：83 / 88

页数：6

共 30 条

[21] Quaternary deep sea temperature histories derived from benthic foraminiferal Mg/Ca [J].

Martin, PA ;

Lea, DW ;

Rosenthal, Y ;

Shackleton, NJ ;

Sarnthein, M ;

Papenfuss, T .

EARTH AND PLANETARY SCIENCE LETTERS, 2002, 198 (1-2) :193-209

[22]

Murray J., 1991, ECOLOGY PALAEOECOLOG

[23] Assessing the reliability of magnesium in foraminiferal calcite as a proxy for water mass temperatures [J].

Nurnberg, D ;

Bijma, J ;

Hemleben, C .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1996, 60 (05) :803-814

[24] DISTRIBUTION COEFFICIENT OF MG-2+ IONS BETWEEN CALCITE AND SOLUTION AT 10-50-DEGREES-C [J].

OOMORI, T ;

KANESHIMA, H ;

MAEZATO, Y ;

KITANO, Y .

MARINE CHEMISTRY, 1987, 20 (04) :327-336

[25] RELATIONSHIP BETWEEN SURFACE-STRUCTURE, GROWTH-MECHANISM, AND TRACE-ELEMENT INCORPORATION IN CALCITE [J].

PAQUETTE, J ;

REEDER, RJ .

GEOCHIMICA ET COSMOCHIMICA ACTA, 1995, 59 (04) :735-749

[26] The distribution of benthic foraminifera in the Celtic Sea: The significance of seasonal stratification [J].

Scott, GA ;

Scourse, JD ;

Austin, WEN .

JOURNAL OF FORAMINIFERAL RESEARCH, 2003, 33 (01) :32-61

[27] High precision glacial-interglacial benthic foraminiferal Sr/Ca records from the eastern equatorial Atlantic Ocean and Caribbean Sea [J].

Shen, CC ;

Hastings, DW ;

Lee, TP ;

Chiu, CH ;

Lee, MY ;

Wei, KY ;

Edwards, RL .

EARTH AND PLANETARY SCIENCE LETTERS, 2001, 190 (3-4) :197-209

[28] Millennial-scale variability of deep-water temperature and δ18Odw indicating deep-water source variations in the Northeast Atlantic, 0-34 cal. ka BP -: art. no. 1098 [J].

Skinner, LC ;

Shackleton, NJ ;

Elderfield, H .

GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, 2003, 4

[29] VARIABLE STOICHIOMETRIC EFFICIENCY OF CA2+ AND SR2+ TRANSPORT BY THE SARCOPLASMIC-RETICULUM ATPASE [J].

YU, X ;

INESI, G .

JOURNAL OF BIOLOGICAL CHEMISTRY, 1995, 270 (09) :4361-4367

[30] Modeling CO2 chemistry, δ13C, and oxidation of organic carbon and methane in sediment porewater:: Implications for paleo-proxies in benthic foraminifera [J].

Zeebe, Richard E. .

GEOCHIMICA ET COSMOCHIMICA ACTA, 2007, 71 (13) :3238-3256

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