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１０Ｂｅ和２６Ａｌ都是长寿命宇宙成因放射性核素（半衰期分别为１．５１和０．７Ｍａ）。在深海沉积物剖面上１０Ｂｅ浓度随深度的增加并不是成简单的指数衰减，而往往表现出较大幅度的起伏和跳跃，沉积物中１０Ｂｅ的初始浓度不仅仅取决于１０Ｂｅ的海底通量，而且还与沉积物的成分以及沉积速率密切相关，１０Ｂｅ在广海海水中的滞留时间可以达到５００～３０００年，这意味着在沉积到海底之前１０Ｂｅ与９Ｂｅ可能已混合均匀，虽然不同海域海底沉积物表面可交换离子相和自生相１０Ｂｅ／９Ｂｅ比值变化很大，但在一个洋盆之内却相对一致并且与洋底海水接近。
Both 10Be and 26Al are long-lived cosmic radionuclides (half-lives of 1.51 and 0.7Ma, respectively). The increase of 10Be concentration along the depth of the deep-sea sediment profile is not a simple exponential decay but tends to show more dramatic fluctuations and jumps. The initial concentration of 10Be in the sediment is not only dependent on the 10Be seafloor flux but also It is also closely related to the sediment composition and deposition rate. The 10Be residence time in Guanghai seawater can reach 500-3000 years, which means that 10Be and 9Be may have been mixed well before being deposited on the seabed, although sediments in different sea areas The ratio of 10Be / 9Be, the exchangeable ion phase and the spontaneous phase, varies greatly, but is relatively consistent within a single oceanic basin and close to the ocean floor waters.