『Abstract
　The distribution of sulfur isotopes in geological materials reveals information about Earth history and biogeochemical processes. Research during the last several decades has used sulfur isotope geochemistry as a tool to better understand microbial processes (Harrison and Thode, 1958; Kaplan, 1975; Monster et al., 1979; Peck,1959, 1962; Rees, 1973) and sediment diagenesis (Berner, 1969, 1982; Canfield et al., 1993b). Earth historians also realized this potential, as there exists a rich record of environmental change within the sedimentary records (Canfield and Teske, 1996; Claypool et al., 1980; Goodwin et al., 1976; Habicht et al., 2002; Kah et al., 2004; Monster et al., 1979; Shen et al., 2001; Strauss, 1993; Thode and Goodwin, 1983). These applications have championed the use of the two most abundant sulfur isotopes [³²S and ³⁴S], and provide a rich introduction to what the sulfur isotope record has to offer [see (Canfield, 2004; Canfield and Raiswell, 1999)]. Within the last decade, this information has been supplemented by new data derived from the less abundant isotopes [³³S and ³⁶S]. The measurement of all four stable sulfur isotopes - multiple sulfur isotope geochemistry - has expanded our understanding of biological evolution and activity, atmospheric chemistry and transport, crustal recycling, and many more fields related to Earth surface processes [see (Farquhar and Wing, 2003)]. Here, I present a review of recent works in multiple sulfur isotope geochemistry with a focus on results that inform our understanding of biogeochemical processes and Earth surface evolution.

Keywords: Multiple sulfur isotopes; Earth history; Oxygen; Precambrian; Evolution; Sulfate reduction』

Contents
1. Introduction
2. Nomenclature, notations and models
　2.1. Theoretical considerations
　2.2. Application
　2.3. Modeling mass-dependent systems: an overview
　　2.3.1. Steady-state modeling treatments
　　2.3.2. Non steady-state modeling treatments
3. Microbial studies and modern environments
　3.1. Sulfate reduction
　3.2. Oxidative and disproportionation pathways
　3.3. Applications to modern marine systems
　3.4. Soft sediments
4. Studies of Proterozoic environments
　4.1. Temporal records
　4.2. Basin-scale studies
　　4.2.1. Mesoproterozoic
　　4.2.2. Paleoproterozoic work
5. The Archean and earliest Paleoproterozoic record
　5.1. An introduction to MIF
　5.2. Mechanisms behind MIF
　　5.2.1. Photochemistry as a source for MIF
　　5.2.2. Alternatives to photochemistry
　　5.2.3. General thoughts on MIF
6. Interpretations of the Archean sulfur cycle
　6.1. Stratigraphic studies of the late Archean-earliest Proterozoic
　6.2. The attenuation of Δ³³S in the mid-archean
　6.3. A fresh look at the Archean sulfur cycle
　6.4. Revisiting the Archean biosphere and δ³⁴S record
　6.5. The antiquity of sulfate reduction
7. Conclusions
Acknowledgements
References