Geochemistry of some carbonate secreting marine living organisms from North West Arabian Gulf

الملخص EN

A total, 15 chemicai variables have been determined from 29 samples representing skeletons of some carbonate secreting organisms from the north west Arabian Gulf.

The analysis are reported as percent Si02, A1203, FeO, Ca0, Mg0, C02, p205, Na20, K20, S03, Ti02, MnO, NiO, PbO and SrO.

Mineralogical analysis revealed the presence of Aragonite, Low Magnesium Calcite (LMC) and High Magnesium Caicite HMC) as dominant minerals, and quartz.

Dolomite and feld- spar as traces.

Chemical analyses indicates that the main differences in the constituents of the studied skeletons are controlled by the water chemistry, mineralogy, growth rate, édification processes and the nature of the constituées.