Noble gas compositions of the mantle-derived xenoliths from Cenozoic volcanic area in Northeastern China

Abstract

We present noble gas data was mantle-derived xenoliths collected from the Cenozoic volcanic by crushing from the five typical Cenozoic volcanic provinces(Kuangdian, Yitong, Huinan and baitoushan, Longquan and yitong) beneath Northeastern China. The 3He/4He ratios within each volcanic province are various with ranges of 12.52-15.78Ra, 3.06-9.10Ra, 6.08-9.18Ra, 7.14-7.71, and 5.87-6.00Ra times the atmospheric ratio (Ra), respectively. the lager variations of 3He/4He ratios shown that the geochemical and isotopic in this SCLM is very heterogeneity, with integrate to the Ne and Ar isotopic components. We suggest that the present lithosperic mantle was formed via the multiple stages of mantle presses which consider to the formed age of lithospheric mantle.