We’re sorry, something doesn't seem to be working properly.

Please try refreshing the page. If that doesn't work, please contact support so we can address the problem.

Skip to main content
Log in

Mg/Ca, Ba/Ca, and S/Ca ratios as environmental and growth proxies for bivalve shells from the Haima cold seep, South China Sea

  • Geomorphology and geological structure of South China Sea
  • Published:
Journal of Oceanology and Limnology Aims and scope Submit manuscript

Abstract

Bivalve shell fossils, cemented by authigenic carbonates, are widely spread in the Haima cold seep, Qiongdongnan Basin of the South China Sea (SCS). In this study, we examined an element profile of Gigantidas platifrons in the Haima cold seeps at a water depth of 1 381 m. Based on the scanning electron microscope (SEM) analyses, the prismatic layer and nacreous layer were identified, which are characterized by prismatic structure and stratified structure, respectively. In addition, the profile can be subdivided into two parts: altered and unaltered zones. Laser inductively coupled plasma mass spectrometry (LA-ICP-MS) mapping shows that the element concentrations of the altered zones were influenced by the authigenic carbonate rocks, whereas the element concentrations of unaltered zones remain stable. In-situ X-ray diffraction (XRD) analyses show that the mineral constituent of the nacreous layer is mainly composed of aragonite. Along with the growth profile, Mg/Ca ratios of unaltered zones have minor variations, ranging 0.72–0.97 mmol/mol (mean=0.87 mmol/mol), with estimated temperatures of 3.8–4.1 °C, indicating that the temperature of the surrounding seawater remains constant and agree with the measured data of 3.9 °C which was conducted by a conductivity-temperature-depth system (CTD). The minor variations of Ba/Ca ratios (0.01–0.06 mmol/mol; mean=0.04 mmol/mol) indicate a relatively stabilized salinity of the surrounding seawater. S/Ca ratios show large variations of 0.04–4.15 mmol/mol (mean=1.37 mmol/mol). S/Ca ratios have regular variations which generally correspond to the variations of the Mg/Ca ratios, highlighting that the S/Ca ratios of bivalve shells show the potential to reflect the growth rate of the Gigantides. However, further studies should be carried out on the understanding of the links between the S/Ca ratios and seepage intensity of cold-seep fluids.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Similar content being viewed by others

Data Availability Statement

The data that support the findings of this study are available from the corresponding author upon reasonable request.

References

Download references

Acknowledgment

We appreciate the constructive suggestions and comments from the editor Dr. Yang CHEN and two anonymous reviewers.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Shengxiong Yang.

Additional information

Supported by the Key Research and Development Project of Guangdong Province (No. 2020B1111510001), the National Natural Science Foundation of China (No. U2244224), the PI Project of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) (No. GML2020GD0802), and the Guangdong Special Support Team Program (No. 2019BT02H594)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Cao, J., Yang, S., Tang, D. et al. Mg/Ca, Ba/Ca, and S/Ca ratios as environmental and growth proxies for bivalve shells from the Haima cold seep, South China Sea. J. Ocean. Limnol. 41, 660–672 (2023). https://doi.org/10.1007/s00343-022-2010-8

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s00343-022-2010-8

Keyword

Navigation