T02_P24

Preparation method of foraminifera radiocarbon sample and its age determination at GXNU-AMS

Qi L¹, Tang J¹, Shi S¹, Wang L¹, Zhang G¹, Chen D¹, Shen H^1,2

¹Guangxi Normal University, Guilin, China, ²Guangxi key laboratory of nuclear physics and nuclear technology, Guilin, China

Foraminifera radiocarbon (¹⁴C) measurements allow absolute geological dating with high accuracy. However, the reliable and accurate measurement of foraminiferal radiocarbon is challenging due to the small sample size and the sample preparation procedure. A series of foraminifera and shell samples from the Pearl River Estuary of China were prepared and performed radiocarbon measurements with a campact accelerator mass spectrometer (GXNU-AMS) at Guangxi Normal University. The results showed that the recovery rate of the samples was more than 80%, and the formation time of foraminifera was between 525 yrBP and 37500yrBP.

Keywords: Foraminifera; GXNU-AMS; ¹⁴C