Laser sampling in isotope studies on uranium minerals

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Authors:Anderson, Ye. B.; Zaslavskiy, V. G.; Nikitin, S. A.; Pavshukov, V. V.; Severin, V. V.; Shishlov, V. A.
Volume Title:Geochemistry International
Source:Geochemistry International, 24(7), p.132-135. Publisher: Springer-Verlag, Heidelberg, International. ISSN: 0016-7029
Publication Date:1987
Note:In English
Summary:Obtaining correct results in dating uranium minerals is largely determined by the purity of the analysed sample, which is related to the heterogeneity of U minerals themselves and their tendency to contain lead-bearing sulphides. The purest samples are obtained with the 'local' method, where they are extracted from U minerals by optically controlled drilling. However, the method is quite laborious and involves difficulties in isolating phases of size <0.3 mm. Also, in mechanical sampling, the drill may wear and material may enter the sample from it, which is a potential source of errors. Here a method is described that substantially extends the possibility of local isotope analysis of U minerals. A focused laser beam is used. The sampling area is determined by the size of the U mineral segregation or of the individual phases and can be adjusted by means of ordinary optical devices from 0.01-0.02 up to 0.3-0.4 mm. The entire sampling procedure for a single point takes a few minutes and maximally eliminates impurities. (Author's abstract) [A.W.H.]
Subjects:Chemical analysis; Errors; Heterogeneity; Impurities; Isotopes; Laser methods; Methods; Sampling; U/Pb; Uranium minerals
Abstract Numbers:88M/4953
Record ID:2014095203
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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008 190222s1987 vp 0 0 eng d
040 |a ViAlAGI  |c ViAlAGI 
072 7 |a 02A  |2 georeft 
100 1 |a Anderson, Ye. B.  |e analytic author 
245 1 0 |a Laser sampling in isotope studies on uranium minerals 
300 |a p. 132-135 
500 |a In English 
500 |a Abstract number: 88M/4953 
500 |a Abstractor: A.W.H. 
500 |a Key title: Geochemistry International 
500 |a Source note: Geochemistry International, 24(7), p.132-135. Publisher: Springer-Verlag, Heidelberg, International. ISSN: 0016-7029 
500 |a Publication type: journal article 
510 3 |a GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom 
520 |a Obtaining correct results in dating uranium minerals is largely determined by the purity of the analysed sample, which is related to the heterogeneity of U minerals themselves and their tendency to contain lead-bearing sulphides. The purest samples are obtained with the 'local' method, where they are extracted from U minerals by optically controlled drilling. However, the method is quite laborious and involves difficulties in isolating phases of size #LT0.3 mm. Also, in mechanical sampling, the drill may wear and material may enter the sample from it, which is a potential source of errors. Here a method is described that substantially extends the possibility of local isotope analysis of U minerals. A focused laser beam is used. The sampling area is determined by the size of the U mineral segregation or of the individual phases and can be adjusted by means of ordinary optical devices from 0.01-0.02 up to 0.3-0.4 mm. The entire sampling procedure for a single point takes a few minutes and maximally eliminates impurities. (Author's abstract) 
650 7 |a Chemical analysis  |2 georeft 
650 7 |a Errors  |2 georeft 
650 7 |a Heterogeneity  |2 georeft 
650 7 |a Impurities  |2 georeft 
650 7 |a Isotopes  |2 georeft 
650 7 |a Laser methods  |2 georeft 
650 7 |a Methods  |2 georeft 
650 7 |a Sampling  |2 georeft 
650 7 |a U/Pb  |2 georeft 
650 7 |a Uranium minerals  |2 georeft 
700 1 |a Zaslavskiy, V. G.,  |e analytic author 
700 1 |a Nikitin, S. A.,  |e analytic author 
700 1 |a Pavshukov, V. V.,  |e analytic author 
700 1 |a Severin, V. V.,  |e analytic author 
700 1 |a Shishlov, V. A.,  |e analytic author 
773 0 |t Geochemistry International  |d Heidelberg : Springer-Verlag, 1987  |x 0016-7029  |y GCINAP  |n Geochemistry International, 24(7), p.132-135. Publisher: Springer-Verlag, Heidelberg, International. ISSN: 0016-7029 Publication type: journal article  |g Vol. 24, no. 7