Stable chlorine isotopes in hydrothermal processes

Details Stable chlorine isotopes in hydrothermal processes Stable chlorine isotopes in hydrothermal processes

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992gecoa..56.4247e&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 56, Issue 12, pp.4247-4255

Other

5

Scientific paper

Values of 37 Cl can now be routinely measured with an analytical precision of ±0.2%., as reported herein on fluid inclusion leachates from the Elmwood-Gordonsville Mississippi Valley-type deposit and formation waters from its host formation; basin brines from the Gulf Coast and Palo Duro Basins; and fluid inclusion leachates and biotites from the Bingham, Silver Bell and Panguna porphyry copper deposits. Isotopic measurements are not affected by reaction yield in the range 85-100% or by generation of free I 2 during sample preparation. In the Elmwood-Gordonsville deposit, five successive paragenetic stages of ore and gangue (sphalerite, fluorite, calcite 2, barite and calcite 3) each yielded multiple 37 Cl measurements. Ranges of 37 Cl vary in alternating fashion between stages with more negative values (sphalerite, calcites 2 and 3) and those with more positive values (fluorite, barite). An interface between two brine systems with 37 Cl < -1.0 and >0.0%. appears to have moved back and forth across the zone of mineralization. Brines from the Gulf Coast and Palo Duro basins are apparently bimodal in 37 Cl with modes near -0.9%. and 0.0%., consistent with the variation in 37 Cl observed in fluid inclusion leachates from Elmwood-Gordonsville. Biotite in the Bingham deposit has 37 Cl values up to 1.7%. and chlorine isotopes that are fractionated with respect to salt-rich hydrothermal fluid. Hydrothermal fluids in all three porphyry copper deposits studied have a 37 Cl range of -0.1 to 0.4%. with the one exception of a -0.5%. value at Bingham. Loss of low- 37 Cl chloride in vapor may balance chloride with a net 37 Cl > 0 in the porphyry deposits.

Affiliated with

Also associated with

No associations

Rating

Stable chlorine isotopes in hydrothermal processes does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Stable chlorine isotopes in hydrothermal processes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stable chlorine isotopes in hydrothermal processes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1114677