Geochemistry of Silicon Isotopes

Preface | V
Acknowledgements | VII
1 Introduction | 1
1.1 Origin and characters of silicon and its isotopes | 1
1.2 A brief description of silicon geochemistry | 1
1.3 The history of silicon isotope studies | 3
2 Analytical methods of silicon isotope composition | 9
2.1 Gas source isotope ratio mass spectrometric analysis of silicon
isotopes | 10
2.2 Multi-collector inductively coupled plasma mass spectrometric
(MC-ICPMS) analysis of silicon isotopes | 17
2.3 Secondary ion mass spectrometry analyses | 23
2.4 Standards and reference materials for silicon isotope
measurement | 26
2.5 Comparison of different methods on silicon isotope analyses | 29
3 Mechanisms of silicon isotope fractionation | 35
3.1 The thermodynamic silicon isotope exchange fractionation | 36
3.2 Kinetic fractionation of silicon isotopes | 55
4 Distribution of silicon isotopes in nature | 69
4.1 Silicon isotope compositions of extraterrestrial materials | 69
4.2 Silicon isotope distribution in lithosphere | 83
4.3 Silicon isotope compositions of soils | 110
4.4 Hydrosphere | 111
4.5 Biosphere | 121
5 Several aspects of silicon isotope applications | 131
5.1 Studies on global silicon cycle | 131
5.2 Silicon isotope studies on environmental variation of ocean | 164
5.3 Studies on mechanisms of absorption, transportation and precipitation
of silicon in plant growth processes | 181
5.4 Studies on silicon source and genesis of ore deposits | 209
References | 241
Index | 275