L1 /   
2
CH3041
GEOCHEMICAL CYCLES II
• Biogeochemical cycles are models using
the best available data to track the movement of an element (fluxes) through
the different reservoirs.  A lot of work is
still going on to fill in gaps in the mass balances of the element cycles eg. carbon.

Plants
Animals
humans
ATMOSPHERE
Space

Surface
Biota
Deep
Estu-
aries
Soil
Igneous
&
Metamorphic
Rocks
Sediments
&
Sedimentary
Rocks
Mantle
Core
E.T.
Atmosphere

Biosphere

Hydrosphere
Lithosphere



Geosphere
CRUST
OCEANS
       Loss to space and the mantle are very small.