Advances in Earth Science ›› 2011, Vol. 26 ›› Issue (9): 997-1005. doi: 10.11867/j.issn.1001-8166.2011.09.0997

Special Issue: IODP

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Progresses in Study of Foraminiferal Mg/Ca-Thermometer: Salinity Effect and Its Correction

Xu Jian 1, Li Jianru 2, Qiao Peijun 2   

  1. 1.State Key Laboratory of Continental Dynamics and Department of Geology, Northwest University, Xi′an 710069, China;
    2.State Key Laboratory of Marine Geology and School of Ocean and Earth Science, Shanghai 200092, China
  • Received:2011-07-21 Revised:2011-08-25 Online:2011-09-10 Published:2011-10-10

Xu Jian, Li Jianru, Qiao Peijun. Progresses in Study of Foraminiferal Mg/Ca-Thermometer: Salinity Effect and Its Correction[J]. Advances in Earth Science, 2011, 26(9): 997-1005.

Mg/Ca-thermometer is one of the most rapidly developed and as well widely used tools to reconstruct paleo-seawater temperatures in the last decade. There is, however, a growing body of evidence showing that the thermometer is significantly biased by a variety of factors. Of them, salinity effect on Mg uptake into biogenic shell calcites is most recently highlighted, with intensive discussions on the “fidelity” of the Mg/Ca-thermometer in reconstructing paleo-seawater temperature, and in turn in calculating salinity when combining Mg/Ca and oxygen isotope on a same foraminiferal sample. In this article, we reviewed the most recent publications with respect to salinity effects on Mg/Ca-thermometer and summarized solutions and/or methods to correct for salinity effects. The objective of this article is to provide helpful and state-of-the-art references for scientists within the country who are engaged in paleoceanographic study using Mg/Ca-thermometer.

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