Please use this identifier to cite or link to this item:
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Identification and composition of secondary meniscus calcite in fossil coral and the effect on predicted sea surface temperature
Author(s): Dalbeck, Paul
Cusack, Maggie
Dobson, Phil S
Allison, Nicola
Fallick, Anthony E
Tudhope, Alexander W
Contact Email:
Keywords: Meniscus calcite
Sr/Ca ratio
Issue Date: 24-Jan-2011
Date Deposited: 24-Feb-2017
Citation: Dalbeck P, Cusack M, Dobson PS, Allison N, Fallick AE & Tudhope AW (2011) Identification and composition of secondary meniscus calcite in fossil coral and the effect on predicted sea surface temperature. Chemical Geology, 280 (3-4), pp. 314-322.
Abstract: This study uses electron backscatter diffraction (EBSD) and atomic force microscopy (AFM) to identify secondary calcite in coral skeletons. Secondary calcite appears to have nucleated on the original aragonite dissepiments, producing horizontal structures that mimic the morphology of the original coral aragonite, forming dissepiment-like meniscus structures. The Sr/Ca and δ18O of the pristine aragonite and secondary calcite were analysed by secondary ion mass spectrometry (SIMS). The effect of calcite inclusion on the mean geochemistry of the coral carbonate and subsequent sea surface temperature (SST) calculations were determined for both Sr/Ca and δ18O. Inclusion of as little as 1% secondary calcite within the primary coral aragonite elevates the Sr/Ca-derived SST by 1.2°C and could markedly offset estimates of past tropical climate. Conversely, inclusion of 10% secondary calcite has little effect on the SST estimated from δ18O (+0.6°C) indicating that this proxy is relatively robust to even large amounts of calcite. The different extents to which the two proxies would be influenced by inadvertent inclusion of such meniscus calcite demonstrate the importance of a multi-proxy approach. © 2010 Elsevier B.V.
DOI Link: 10.1016/j.chemgeo.2010.11.018
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Notes: Additional listed co-author: EIMF - Edinburgh Ion Microprobe Facility
Licence URL(s):

Files in This Item:
File Description SizeFormat 
1-s2.0-S0009254110004213-main.pdfFulltext - Published Version1.42 MBAdobe PDFUnder Embargo until 2999-12-30    Request a copy

Note: If any of the files in this item are currently embargoed, you can request a copy directly from the author by clicking the padlock icon above. However, this facility is dependent on the depositor still being contactable at their original email address.

This item is protected by original copyright

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

The metadata of the records in the Repository are available under the CC0 public domain dedication: No Rights Reserved

If you believe that any material held in STORRE infringes copyright, please contact providing details and we will remove the Work from public display in STORRE and investigate your claim.