The Initial Exploration for 26Al Chronology in Ferromanganese Crust

Dr Kejun Dong1, Ying Hu1, Lifeng Cui1, Ms. Jiaqi Zhang1, Prof. Sheng Xu1

1Institute of Surface Earth System Science, School of Earth System Science, Tianjin University, Tianjin, China

The dating techniques of 10Be/9Be has widely been used in study on the chronology of marine sediments with the development of accelerator mass spectrometry (AMS). However, some controversial topics were still remained due to the influence of isotope fractionation, palaeomagnetic intensity variations and measurement sensitivity etc. The deep-sea ferromanganese crust (DSFC) is a natural archive for recording of the history of the earth evolution, as one of the most common authigenic assemblages in marine sediments. An initial exploration for 26Al chronology in DSFC was proposed by using AMS measurement of 10Be and 26Al. The experimental protocol will focus on previous research and the corresponding relationship of isotopic ratios of Al and Be, discuss and explore the possibility of 26Al chronology based on the DSFC samples analysis and linear contrast with 10Be and 10Be/9Be. The experimental strategy and program will be detailed in this contribution.


Dr. Dong comes from the AMS laboratory of Tianjin University in China. About 2000 14C, 500 10Be and 300 26Al samples have been determined since the AMS system was installed in the School of Earth System Science, Tianjin University in October 2017. The cosmogenic nuclides of 14C, 10Be and 26Al AMS techniques have been applied in the fields of geology, environment and marine science at Tianjin University. In this presentation, the topic of the Initial Exploration for 26Al Chronology in Ferromanganese Crust will be introduced.

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Nov 08 - 19 2021