کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4701256 | 1637759 | 2006 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Matrix effects in hydrogen isotope analysis of silicate glasses by SIMS
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We report the results of a study of hydrogen isotope analysis of silicate glasses by secondary ion mass spectrometry (SIMS) using a Cameca 6F ion probe. Large differences between measured and true D/H ratios result from instrumental mass fractionation (IMF); the measured D/H ratios are depleted in the heavy isotope by an average of â 220â° but with a total range of 60â°. Differences in IMF within subsets of glasses correlate with variables such as H2O abundance, density, and other chemical parameters and these variations constitute a significant matrix effect. The energy- and composition-dependence of hydrogen isotope IMF in glasses is well described by kinetic energy transfer analysis in a simple elastic two-collision cascade model, and provides important insight into the origins of matrix effects in SIMS. The analysis leads to a correction method for D/H matrix effects that predicts the measured IMF values to within ± 8â°, and an example data reduction is given for analysis of submarine glasses from the Reykjanes Ridge.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Geology - Volume 235, Issues 3â4, 15 December 2006, Pages 352-365
Journal: Chemical Geology - Volume 235, Issues 3â4, 15 December 2006, Pages 352-365
نویسندگان
Erik H. Hauri, Alison M. Shaw, Jianhua Wang, Jacqueline E. Dixon, Penelope L. King, Charles Mandeville,