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.
Similar content being viewed by others
References
He, Q. X., Zhang, M. S., Ye, Z. Z. et al., Stable isotope stratigraphy of the Late Pleistonce carbonate deposits of Shidao, Xisha Islands,Marine Geology and Quaternary Geology (in Chinese), 1986, 6:1.
Han, C. R., Carbonate mineral and oxygen and carbon isotope characters of reef-facies carbonate deposit from Xishen-1 core,Marine Geology and Quaternary Geology (in Chinese), 1989, 9:29.
Zhang, M. S., He, Q. X., Ye, Z. Z. et al.,Geology of Reef-facies Carbonate Sediment in Xisha Archipelago, Beijing:Science Press, 1989.
Yu Jinsheng, Chen Yuwei, Gui Xuntang et al., C, O, Sr and Pb isotopic compositions of reef-tacies carbonates of NY-1 core and their paleoenvironmental implications,Science in China, Ser. B, 1995, 38(2):245.
The Multidisciplinary Oceanographic Expedition Team of Academia Sinica to Nansha Islands,Quaternary Coral Reef Geology of YongshuReef, Nansha Islands, Beijing:China Ocean Press, 1992.
McConnaughey, T.,13C and18O isotopic disequilibrium in biological carbonates:I. Patterns,Geochim. Cosmochim. Acta, 1989, 53:151.
Oppo, D. W., Fairbanks, R. G., Variability in the deep and intermediate water circulation of the Atlantic Ocean during the past 25000 years:Northern Hemisphere modulation of the Southern Ocean,Earth Planet. Sci. Lett., 1987, 86:1.
Martinson, D. G., Pisias, N. G., Hays, J. D. et al., Age dating and the orbital theory of the Ice Ages:Development of a high-resolution 0 to 300000-year chronostratigraphy,Quaternary Research, 1987, 27:1.
Author information
Authors and Affiliations
Additional information
Project supported by the National Natural Science Foundation of China (Grant No. 49373162) and Nansha Sciences Multidisciplinary Team.
Rights and permissions
About this article
Cite this article
Wei, G., Yu, J., Gui, X. et al. Paleoclimate implication of oxygen and carbon isotopic composition from diagenesis coral. Sci. China Ser. D-Earth Sci. 41, 609–615 (1998). https://doi.org/10.1007/BF02878743
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02878743