Paper Information

Journal:   GEOSCIENCES   SPRING 2007 , Volume 16 , Number 63; Page(s) 164 To 179.
 
Paper:  LITHOFACIES, SEDIMENTARY ENVIRONMENT AND PROVENANCE OF MIXED SILICICLASTIC-CARBONATE-EVAPORATE DEPOSITIONS OF ASMARI FORMATION IN AHWAZ OIL FIELD WITH REFERENCE TO MIXING MECHANISMS
 
Author(s):  HOSSEINI BARZI M., JAFARZADEH MAHDI
 
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Abstract: 
Petrofacies analyses of Asmari Formation carried out on thin sections, obtained from oil wells of number 11, 85 and 89 in Ahvaz oil field, show 5 carbonate-evaporate microfacies associations (related to a carbonate ramp) and 2 siliciclastic petrofacies. Point counting data plotted on Qt93.34 F4.10 Lt2.59 Qm86.75 F4.10 L9.15 diagrams imply the cratonic and recycled orogen tectonic provenance. Furthermore, these results and the other petrographic evidences indicate a source rock with sedimentary and low to medium degree metamorphic composition for Ahvaz sandstone. Combining the obtained results with global sea level changes, variation in sediment supply and regional and local tectonic evolution, assisted us to recognize 6 evolutionary stages for Samara basin. In fact, Asmari Formation deposited in a carbonate-evaporate ramp with different amount of sediment influx through the time.
 
Keyword(s): SANDSTONES DEPOSITIONAL ENVIRONMENTS, TECTONIC SOURCES, MECHANISM OF MIXING
 
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