Reservoir primary-secondary minerals

The sedimentary and metamorphic rocks uplifted onto land have become part of continents or oceanic islands. These rocks are now subject to chemical weathering. The dissolved and particulate weathering products are transported back to the ocean by river runoff. Once in the ocean, the weathering products are available for removal back into a marine sedimentary reservoir. At present, most mass flows on this planet involve transport of the secondary (recycled) materials rather than the chemical reworking of the primary (juvenile) minerals and gases. The natirre of these transport and sediment formation processes has been covered in Chapters 14 through 19 from the perspective of the secondary minerals formed. We now reconsider these processes from the perspective of impacts on elemental segregation between the reservoirs of the crustal-ocean-atmosphere factory and the mantle. 

Residence time The time that an individual atom, particle, or organism spends in a reservoir Response time The time-scale characterizing the adjustment of a reservoir to equilibrium following a sudden change in boundary conditions, inputs, or outputs Saprolite Finely divided weathered rock that has not been transported away from the site of weathering Secondary minerals Minerals that are formed from primary minerals by weathering, diagenesis, and other post-consolidation reactions... 

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