Science in China Series D: Earth Sciences

, Volume 40, Issue 2, pp 120–129 | Cite as

Geochemistry on mantle-derived volatiles in natural gases from eastern China oil/gas provinces (I)

A novel helium resource—commercial accumulation of mantle-derived helium in the sedimentary crust
  • Yongchang Xu
  • Ping Shen
  • Mingxin Tao
  • Wenhui Liu


Commercial accumulation of mantle-derived helium in the sedimentary shell is discussed. Generally speaking, a commercial helium pool is formed by accumulated4He that comes from uranium and thorium via α-decay; therefore, it has a very low3He/4He value in the magnitude of 10-8. The helium concentration in some gas wells of eastern China oil/gas provinces is about or over 0.05% —0. 1%, consequently forming commercial helium wells (pools), such as the Wangjinta Gas Pool in Songliao Basin, Huangqiao Gas Pool in North Jiangsu Basin and some gas wells in Sanshui Basin. Studies have proved that when the3He/4He value of a helium gas pool is about 3.7 × 10-6 -7.2×10-6 namely mantle-derived helium in its total helium concentration accounts for 33.5%—65.4%, it is a crust-mantle dual-source or dominantly mantle-derived helium gas pool, which is a novel helium resource and its formation is mainly related to the distribution of megafractures.


mantle-derived helium mantle volatile at present helium isotopic composition 


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Copyright information

© Science in China Press 1997

Authors and Affiliations

  • Yongchang Xu
    • 1
  • Ping Shen
    • 1
  • Mingxin Tao
    • 1
  • Wenhui Liu
    • 1
  1. 1.State Key Laboratory of Gas Geochemistry, Lanzhou Institute of GeologyChinese Academy of SciencesLanzhouChina

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