『Abstract
　A dynamical model (MAGic) is presented that describes the elemental cycling of sedimentary materials involving sodium, potassium, calcium, magnesium, chloride, carbon, oxygen, iron, sulfur and phosphorus through much of the Phanerozoic. The model incorporates the basic reactions controlling atmospheric carbon dioxide and oxygen concentrations, continental and seafloor weathering of silicates and carbonate rocks, net ecosystem productivity, basalt-seawater exchange reactions, precipitation and diagenesis of chemical sediments and authigenic silicates, oxidation-reduction reactions involving carbon, sulfur, and iron, and subduction-decarbonation reactions. Although MAGic contains feedback and forcing functions adapted from the GEOCARB models (Berner, 1991, 1994; Berner and Kothavala, 2001), these functions are incorporated in a reservoir-reaction scheme that is considerably more detailed. Coupled reservoirs include shallow and deep cratonic silicate and carbonate rocks and sediments, seawater, atmosphere, oceanic sediments and basalts, and the shallow mantle. Model results are reasonably consistent with recently published constraints provided by fluid inclusion, isotopic, floral, and mineralogical records. We have used these results to evaluate sensitivity to uncertainties in the history of the earth-ocean-atmosphere system over the past 500 Ma: the advent of pelagic carbonate sedimentation, the importance of burial versus early diagenetic dolomite formation, the importance of reverse weathering, and the relationship of these processes to seafloor spreading rates. Results include a general pattern of dolomite abundance during periods of elevated seafloor spreading and alkalinity production, elevated atmospheric CO2 concentrations for most of the Phanerozoic similar to those predicted by GEOCARB, and covariance of seawater sulfate to calcium ratios with magnesium to calcium ratios. These trends are broadly consistent with proxies for seawater composition and the mass-age data of the rock record itself.』

Introduction
Model organization
　Study sate fluxes
　Continental weathering fluxes and CO2
　Diagenetic and reverse weathering fluxes
　Seawater saturation state, model operation, and notation
　Calcium-magnesium-silicate-carbonate-CO2 subcycle
　Sodium-potassium-silicate-carbonate-chloride-CO2 subcycle
　Organic carbon subcycle
　Sulfur subcycle
　Iron and phosphorus subcycle
Model results and discussion
　Atmospheric CO2 and the basalt carbonate buffer
　　MAGic standard run
　　Relationship to sulfate
　　The role of spreading rate
　Dolomite distribution and reverse weathering
　Productivity, phosphorus, and carbon burial
Conclusion
Acknowledgments
Appendix
　Table A1 Principal fluxes
　Table A2 Net atmospheric fluxes
　Table A3 Model differential equations and steady state values
References