NInstitute of Oceanology,Chinese Academy of Sciences
Research Divisions
Key Laboratory of Marine Geology a...

The University of Paris-Sud (University of Paris XI) is a place dedicated to high-level research, focused on understanding the world, backing student success and responding to the needs of society. Its high level of research is evidenced by numerous awards and its position in international rankings. But the University of Paris-Sud can also be proud of its leading position among French universities, in terms of integration of students and doctoral students. As a globally famous isotopic research center, the isotopic geochemical laboratory jointly sponsored by the Geosciences Paris-Sud, University of Paris-Sud and the National research Center for Climate and Environment of France can be used to analyze Sr-Nd isotopic composition of sediment as well as Nd isotopic component of foraminifer. Thus produced research results have been published in many globally famous journals such as Nature, Earth and Planetary Science Letters, Quaternary Science Reviews, and Geochemica et Cosmochimica Acta.

The main aim of the present cooperation is to take advantage of the isotopic geochemical laboratory as mentioned above to carry out Sr-Nd isotopic analyses on tens of modern sediment trap samples, collected from the West Pacific for the first time, which can not be made in China. Thus produced data can be used to effectively recover the potential linkage among the Kuroshio Current, the East Asian monsoon, and the ENSO as well as its significance for sediment source-to-sink process at present, and thus to shed light on their evolutions during the geological past. Besides, the present visit might further improve the close cooperation between Institute of Oceanology, Chinese Academy of Sciences and the University of Paris-Sud, and thus to produce some important scientific results (e.g., publication of some top SCI papers as well as significant progresses of some important research programs such as the Strategic Priority Research Program of the Chinese Academy of Sciences, the Chinese Academy of Sciences Interdisciplinary Innovation Team Program, and the National Natural Science Foundation of China).

The actual visiting schedule is very compact. That is, the visiting time has been condensed from the previously planned 28 days (10.9-11.5) to the present 18 days (10.19-11.5), caused by the late issue of a French visa as well as the long distance of a round trip. Fortunately, all the pretreatment work for Sr-Nd isotopic analyses of 18 sediment samples as well as Nd isotopic analyses of 23 foraminifera has been finished during the condensed visit period via the hard work of myself, together with the great help from two PhD candidates Zhaojie Yu and Huifang Ma who are studying there under the support of the China Scholarship Council. The pretreatment work is really complex, including many steps such as the absolute dissolution of sediment, extraction of major elements, purification and extraction of Sr, extraction of rare earth elements, and purification and extraction of Nd, as well as crush, clean with deionized water, and clean with methanol on foraminiferal sample. Besides, Zhaojie Yu will help me book and then finish the instrumental analysis process. To be fair, the whole visiting process is really compact and fruitful. Based on this visit, I have mastered the whole pretreatment process for Sr-Nd isotopic analyses of sediment as well as Nd isotopic analyses of foraminifer in a super-clean laboratory. This can help us finish all the above pretreatment work domestically, and thus can significantly save visiting time and expense in the future.

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