Computer Science
Scientific paper
Sep 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51.2479t&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 51, Issue 9, pp.2479-2487
Computer Science
2
Scientific paper
The accuracy and precision of absolute C concentrations measured by beta track autoradiography (BTA) have been evaluated by synthesizing 14 CO 2 -bearing glasses (0.5-2.0 wt.% CO 2 ) of albite and diopside composition and comparing the amount of CO 2 introduced into the glass to the amount measured by BTA. Measured CO 2 contents in diopside glass are less than loaded CO 2 contents, but agree within experimental error; measured contents in albite glass are greater than loaded contents by 10-50%, which exceeds experimental error in many cases. Carbon isotope fractionation between calcite and CO 2 vapor is not significant above 1000°C at 0.1 or 3.0 GPa and cannot explain the discrepancies. The discrepancies represent an error in BTA which has not been previously recognized and is apparently related to beta absorption. Based on this study, CO 2 concentrations in albite measured by BTA should be corrected downward by 40%, which would bring such solubilities into better agreement with those determined by infrared spectroscopy. CO 2 solubilities in diopside melts measured by BTA are in agreement with phase equilibria and are accurate to within 20%. Partition coefficients measured by BTA may be subject to analytical errors inherent to autoradiography. Lack of awareness of these potential errors casts doubt on the accuracy of these measurements in many cases.
No associations
LandOfFree
An evaluation of the carbon-14 beta track technique: Implications for solubilities and partition coefficients determined by beta track mapping 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 An evaluation of the carbon-14 beta track technique: Implications for solubilities and partition coefficients determined by beta track mapping, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An evaluation of the carbon-14 beta track technique: Implications for solubilities and partition coefficients determined by beta track mapping will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1674500