Dolomitization models of Elika formatiOn in the Bolbol-Khan area , Amol

Category Sedimentology
Group GSI.IR
Location 20th symposium on geosciences
Holding Date 16 April 2008

General:
     Dolomitization is one of the major processes of diagenesis in Elika formation.This formation is located in the north Alborz within Emarat anticlinoriumwith Permian rocks in the core of anticlinorium . According to the studies of staining thin section, polished handspacimens and SEM, processes of dolomitization distinguished Dolomites are three categories : I- fine crystal dolomites together with evaporitive mineral , mud cracks and stromatolites , 2 - planar euhedral shape dolomites with vados silt and 3 - saddle dolomites which have undulos extinction and also dolomites are associated with stylolite.
Dolomitization in Elika formation is consided with three models : sabkha , meteoric - marine mixing zone or Dorag and burial . Sources of the Mg for dolomitization are HMC and connat water within formation . On the other hand, the effect of shales of Shemshak formation can”t be ignored , because of dolomitization processes at top of Elika formation is more than other portion of it.

tags: MAZANDARAN