Natural CF4 and SF6 on Earth

被引：93

作者：

Harnisch, J

Eisenhauer, A

机构：

[1] Max Planck Inst Aeron, MPAE, D-37191 Katlenburg Lindau, Germany

[2] Univ Gottingen, Inst Geochem, IGCG, D-37077 Gottingen, Germany

来源：

GEOPHYSICAL RESEARCH LETTERS | 1998年 / 25卷 / 13期

关键词：

D O I：

10.1029/98GL01779

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The occurrence of CF4 and SF6 in natural fluorites (CaF2) is reported. Contents are found to be typically 200-2000 ppt-mass for CF4 and 50-100 ppt-mass for SF6. CF4 and SF6 were also detected in granites where fluorite is an accessory mineral. CF4 and SF6 thus possess a large reservoir in the continental crust that by degassing can sustain natural atmospheric background levels of 40ppt-mole and up to 0.01 ppt-mole, respectively. The article also discusses how natural SF6 may cause interference in hydrological tracer studies.

引用

页码：2401 / 2404

页数：4