LASER MICROPROBE ANALYSES OF NOBLE-GAS ISOTOPES AND HALOGENS IN FLUID INCLUSIONS - ANALYSES OF MICROSTANDARDS AND SYNTHETIC INCLUSIONS IN QUARTZ

被引:65
作者
BOHLKE, JK [1 ]
IRWIN, JJ [1 ]
机构
[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720
关键词
D O I
10.1016/0016-7037(92)90126-4
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
Ar, Kr, Xe, Cl, Br, I, and K abundances and isotopic compositions have been measured in microscopic fluid inclusions in minerals by noble gas mass spectrometry following neutron irradiation and laser extraction. The laser microprobe noble gas mass spectrometric (LMNGMS) technique was quantified by use of microstandards, including air-filled capillary tubes, synthetic basalt glass grains, standard hornblende grains, and synthetic fluid inclusions in quartz. Common natural concentrations of halogens (Cl, Br, and I) and noble gases (Ar and Kr) in trapped groundwaters and hydrothermal fluids can be analyzed simultaneously by LMNGMS in as little as 10(-11) L of inclusion fluid, with accuracy and precision to within 5-10% for element and isotope ratios. Multicomponent element and isotope correlations indicate contaminants or persistent reservoirs of excess Xe and/or unfractionated air in some synthetic and natural fluid inclusion samples, LMNGMS analyses of natural fluid inclusions using the methods and calibrations reported here may be used to obtain unique information on sources of fluids, sources of fluid salinity, mixing boiling (or unmixing), and water-rock interactions in ancient fluid flow systems.
引用
收藏
页码:187 / 201
页数:15
相关论文
共 55 条
[1]   ATMOSPHERIC AND RADIOGENIC GASES IN GROUNDWATERS FROM THE STRIPA GRANITE [J].
ANDREWS, JN ;
HUSSAIN, N ;
YOUNGMAN, MJ .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1989, 53 (08) :1831-1841
[2]  
BERNATOWICZ TJ, 1979, 10TH LUN PLAN SCI C, V10, P104
[3]   A METHOD OF CALCULATING FLUID INCLUSION VOLUMES BASED ON VAPOR BUBBLE DIAMETERS AND P-V-T-X PROPERTIES OF INCLUSION FLUIDS [J].
BODNAR, RJ .
ECONOMIC GEOLOGY, 1983, 78 (03) :535-542
[4]  
BOHLKE JK, 1990, NUNA RES C GREENSTON, P15
[5]  
BOHLKE JK, 1989, US GEOL SURVEY B, V1890, P61
[6]  
BOHLKE JK, 1987, GEOL SOC AM ABSTR, V19, P594
[7]  
BOHLKE JK, 1990, PACROFI, V3, P18
[8]  
BOHLKE JK, 1991, GEOCHIMICA COSMOCHIM, V56, P203
[9]  
BOHLKE JK, 1992, IN PRESS EARTH PLANE
[10]  
Carpenter A, 1978, OKLAHOMA GEOLOGICAL, V79, P60