The boron isotope geochemistry of the Kirka borate deposit, western Turkey

Details The boron isotope geochemistry of the Kirka borate deposit, western Turkey The boron isotope geochemistry of the Kirka borate deposit, western Turkey

Sep 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995gecoa..59.3599p&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 59, Issue 17, pp.3599-3605

Other

1

Scientific paper

We have measured the boron isotope composition of seventeen samples of borate minerals (colemanite, ulexite, and borax) and the 87 Sr/ 86 Sr ratio in thirteen borate samples from the Kirka borate deposit in western Anatolia, Turkey. These Neogene deposits were formed by evaporation of playa lakes fed by geothermal springs. The 11 B values range from -14.9% o in colemanite to -1.6% o in borax. To a first approximation the relative differences in the 11 B values of the borate minerals are consistent with their basic boron atomic configuration, but the magnitude of the boron isotope fractionation between the three minerals precludes their simultaneous precipitation from a brine with the same boron isotope composition and pH. Rather the data are consistent with precipitation of colemanite from a brine with lower pH than that required for ulexite precipitation, which in turn requires a lower pH than is needed for borax precipitation. The boron isotope data also suggest that the borate minerals did not maintain boron isotopic equilibrium with the brine after they precipitated. Rayleigh fractionation models indicate that during borax precipitation the 11 B value of the brine was slightly heavier than during precipitation of ulexite and colemanite.

Affiliated with

Also associated with

No associations

Rating

The boron isotope geochemistry of the Kirka borate deposit, western Turkey 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 The boron isotope geochemistry of the Kirka borate deposit, western Turkey, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The boron isotope geochemistry of the Kirka borate deposit, western Turkey will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-827138