Source rocks modelling

Conclaves F. T. T. (2002) Organic and isotope geochemistry of the Early Cretaceous rift sequence in the Camamu Basin., Brazil paleolimnolgical inferences and source rock models. Org. Geochem. 33(1), 67-81. 

In this chapter, we have tried to review the recent literature on trace elements in rivers, in particular by incorporating the results derived from recent ICP-MS measurements. We have favored a field approach by focusing on studies of natural hydrosystems. The basic questions which we want to address are the following What are the trace element levels in river waters What controls their abundance in rivers and fractionation in the weathering - - transport system Are trace elements, like major elements in rivers, essentially controlled by source-rock abundances What do we know about the chemical speciation of trace elements in water To what extent do colloids and interaction with solids regulate processes of trace elements in river waters Can we relate the geochemistry of trace elements in aquatic systems to the periodic table And finally, are we able to satisfactorily model and predict the behavior of most of the trace elements in hydrosystems ... 

The sources of the saline fluids are argued by some to be water-rock interaction based on the presence of abundant chloride in mineral phases, fluid inclusions, and the incorporation of water into minerals as ways to increase sahnity. The strong similarity of fluids and mineral chemistry, especially for parameters such as strontium isotopes, is cited as evidence for the water-rock model of origin. 

Ritter U., Myhr M.B., Vinge T., Aareskjold K. (1995) Experimental heating and kinetic models of source rocks comparison of different methods. Org. Geochem. 23, 1-9. 

The model simulates the history of shaly source rock for an assumed burial and thermal history. The results discussed here are based on a constant sedimentation rate of 500 m/m.y., and a geothermal gradient of either 30 C/km or60 C/km, A Gulf Coast-type porosity gradient for shale is used, where porosity = 0.39 depth (ft) increment... 

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