Document Details

Document Type : Article In Journal 
Document Title :
Modes of Occurrence of Dolomite in some Arabian Carbonate Rocks
أشكال تواجد الدولوميت في بعض الصخور الكربوناتية العربية
 
Subject : Earth Sciences 
Document Language : English 
Abstract : In Central Saudi Arabia, outcrops of the Upper Permian Khuff and Upper Jurassic Jubaila carbonate formations have been affected by widespread dolomitization and dedolomitization. The latter replacement process is frequently associated with the development of rhombohedral pores. Nine different modes of occurrence of dolomite were recognized in the examined rocks. They are: (1) ferroan dolomite and iron oxide rhombohedra; (2) calcitized dolomite; (3) leached dolomite rhombohedra; (4) zoned dolomite; (5) dark centered-clear rimmed dolomite; (6) sucrosic dolomite; (7) interlocking dolomite; (8) crypto- and microcrystalline dolomite; and (9) cement dolomite. These modes are likely to have resulted from paragenetic and epigenetic changes in the texture and composition of dolomite crystals during their growth stages and later weathering respectively. They possibly reflect as well differences between the physico-chemical environments of the penecontemporary and subsequent to burial dolomitization. The former produced extremely fine-textured, iron-free, dolomite replacing lime mud matrix and/or calcarenite, whilst the latter formed coarser and zoned dolomite crystals indiscriminately replacing depositional carbonate constituents and sparry calcite cement. Dolomite not only grew as replacement to calcium carbonate sediments and rocks, but also as pore-filling cement. 
ISSN : 1012-8832 
Journal Name : Earth Sciences Journal 
Volume : 10 
Issue Number : 1 
Publishing Year : 1419 AH
1998 AD 
Number Of Pages : 15 
Article Type : Article 
Added Date : Sunday, October 11, 2009 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
رشاد حسن زيدانRASHAD H. ZEIDANResearcher  
محمد حسين بسيونيMUHAMMED H. BASYUNIResearcher  

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