| Author(s) | M.E. Dabbagh |
| Affiliation | Geology Department, College of Science, King Saud University, Riyadh, Saudi Arabia |
| Title | Diagenesis of Jurassic Tuwaiq Mountain Limestone, |
| Source | Journal of King Saud University. Science. Volume 19, No 1. (2007/1427) |
| Abstract | Outcrops of the Jurassic Tuwaiq Mountain Limestone in central Saudi Arabia was diagenitically studied in detail. This formation has been divided into lower and upper parts purely on lithologic grounds. Several microfacies can be distinguished. Mudstone, wackestone and packstone are the most common microfacies. Grainstone is less encounterd and floatstone and boundstone are rare. A slight change in the limestone facies is interpreted as a reflection of depositional shelf environment; it is a normal marine carbonate sequence. The Tuwaiq Mountain Limestone shows various diagenetic features. These include cementation, micritization, dolomitization, dedolomitization and recrystallization. Many of the examined samples of the Tuwaiq rocks of limestone and dolomitic limestone are dedolomitized as evidenced by the presence of partially or completely calcitized dolomite crystals. Dolomite is dominant in many of the lime mudstone, wackestone and packstone facies. Leaching of packstone and lime mudstone (micrites), and dedolomitization of dolomite and dolomitic limestone, followed by recrystallization, are common processes of diagenesis. |
