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Science in China Series D: Earth Sciences

, Volume 41, Issue 6, pp 609–615 | Cite as

Paleoclimate implication of oxygen and carbon isotopic composition from diagenesis coral

Discussion on the data from NY-1 core
  • Gangjian Wei
  • Jinsheng Yu
  • Xuntang Gui
  • Fuji Yu
  • Yuwei Chen
  • Deping Liu
Article

Abstract

Oxygen and carbon isotopic compositions of diagenesis? coral samples from NY-1 core at the depth of 22 to 50 m, together with mineral compositions of transitive coral samples of 17 to 18 m at the depth, were meas ured. The data exhibited that when aragonite changed to calcite, its oxygen and carbon isotopic compositions dropped roughly on a linear trend. The linear trend implies that the oscillation pattern of the origin oxygen and carbon isotopic ratios of the aragonite could probably be retained after they diageneticly changed into calcite. Oxygen isotopic stratigraphy for the NY-1 core at the depth between 22 and 50 m was determined according to the δ8O ratios of the calcite coral. The oxygen stratigraphy provided an age of about 289 ka for 45 m of the NY-1 core, which agreed with that by paleomagnetic stratigraphy.

Keywords

diagenesis coral oxygen and carbon isotope paleoclimate information NY-1 core 

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Copyright information

© Science in China Press 1998

Authors and Affiliations

  • Gangjian Wei
    • 1
  • Jinsheng Yu
    • 1
  • Xuntang Gui
    • 1
  • Fuji Yu
    • 1
  • Yuwei Chen
    • 1
  • Deping Liu
    • 1
  1. 1.Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhouChina

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