DEFINITIONS ( Geochemical Cycle) ▪ The chemistry of the composition and alterations of the solid matter of the earth or a celestial body. ▪ The pathway that chemical elementstake in the surface and crust of the Earth▪ This encompasses the natural separation and concentration of elements and heat-assisted recombination processes. Geochemical Balance ▪ The proportional distribution, and the migration rate, in the global fractionation of elements, minerals, or compound ▪ The balance between the weight of the chemical elements that entered the ocean during the weathering of igneous rock (proportional to its clarks) during the e arth’s eistence and the weight of chemical elements that make up sedimentary rocks (taking into account water and carbon dioide) together with the weight of chemical elements con ser!ed in the marine "one. Geochemical Processes ▪ change in the chemical composition of rocks and minerals, as well as of melts and solutions from which the rocks were formed. ▪ it leads to the migration of chemical elements (remo!al of some, introduction and concentration of others), changes in their !alence states, and so on ▪ They may be subdi!ided into geologically prehistoric, enogenic, e!ogenic, and metamorphogenic categories. BIOGEOC"E#IC$% C&C%E # - #$%&'- *+%'E- T%'E' - '*E/ - /'0/'%10 0 - 01231%
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▪ The chemistry of the composition and alterations of the solid matter of the earth or a celestial
body.
▪ The pathway that chemical elements take in the surface and crust of the Earth
▪ This encompasses the natural separation and concentration of elements and heat-assisted
recombination processes.
Geochemical Balance
▪ The proportional distribution, and the migration rate, in the global fractionation of elements,
minerals, or compound
▪ The balance between the weight of the chemical elements that entered the ocean during theweathering of igneous rock (proportional to its clarks) during the earth’s eistence and the weight
of chemical elements that make up sedimentary rocks (taking into account water and carbon
dioide) together with the weight of chemical elements conser!ed in the marine "one.
Geochemical Processes
▪ change in the chemical composition of rocks and minerals, as well as of melts and
solutions from which the rocks were formed.
▪ it leads to the migration of chemical elements (remo!al of some, introduction and
concentration of others), changes in their !alence states, and so on
▪ They may be subdi!ided into geologically prehistoric, enogenic, e!ogenic, and