Document Details
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Document Type |
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Project |
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Document Title |
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Composed Daphne: A Study of stratified rock properties and sedimentation Alrussoupah environment, Rabigh, Saudi Arabia متكون دافن : دراسة الخصائص الصخرية الطباقية والروسوبية وبيئة الترسيب ، منطقة رابغ ،المملكة العربية السعودية |
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Document Language |
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Arabic |
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Abstract |
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Research includes the study of mixed Daphne in Rabigh in terms of the characteristics of the rock stratification and sedimentary rocks and for the purpose of identification on the environment of deposition and its relationship to cover the sedimentary area of study, was done through examination and study of fourteen sectors Geology measured and their units and rock classified Trakbhe sediment were taken from representative samples of the study laboratory. And extends composed Daphne as described in the geological map of the box Rabigh (22 d) of the western edge of the Arabian Shield region of Tihama Hijaz in the far east to the Red Sea coast in the far West, between latitudes 22 ˚ - 30 22 ˚ and longitudes 39 ˚ - 30 39 ˚.
It was found that Daphne is composed consists of three martyrs, the most important sedimentary clastic facies Sulaisah which appears in the form of sequences of cycles characterized by lack of particle size from bottom to top in the river system represents a facies. Carbonate facies, which extends along the southwestern edge of the Formation consists of calcareous stone is fossilized, and Foramnniferah and Haabih. And appear in the far western edge of the third facies is composed of sequences consisting of the residues of Almtbkharc.
Facies consists Sulaisah transferred from coarse sand and gravel changes to a fine sand, and then units of shale, and ranges for the average size of grains of sand is very fine to very coarse, and varies in terms of the classification of the average to bad. The sand grains are generally low-balling and the degree rotated between the semi-theodolite theodolite.
It consists of sandstone facies Alsellsah transferred from beads Mzoah single vehicle and some grains of quartz, in addition to an equal amount of feldspar grains is dominated by potassium feldspar and Albulajiokles exposed to varying degrees of decomposition. And lacks the installation of sandstone rock and debris to indicate that this structure is a mature sandstone belongs to Jeroaqui Filspara derived from the rocks of the Arabian Shield, which was transferred to a short distance had not been subjected to advanced stages of the stages of metamorphosis.
The carbonate facies is composed of limestone and non-fossil Alforamnnifera Reef Marine Park and the deposition in shallow marine environments ranging from lakes, beach (Lagoon) closed to the beach nearby. The facies Almtbkharc it consists of a sequence of deposits of gypsum and consists of two parts below consists of gypsum coherent range from the size of crystals of sand, silt and end sequence of the marshes of old, and the top consists of gypsum coherent also ends with a layer of gypsum, plywood was deposition of this sequence in two phases in the Lagoon is closed located in the far west of the facies Alsellsé first phase deposition of the gypsum in the center of Lagoons and finished depositing bog old when full Lagoons, and the second deposition of the gypsum upper and ended depositing gypsum plywood in after another, from the gypsum and the girl child at the direction of Lagoons to the closure and the high degree of salinity.
Have been identified in four clusters of metal clay units are clay press releases in the shipments of the three characteristic composed Daphne, the first containing the metals Almontmurilonat and Alalit and Alcaulinic in descending order of abundance, and the second containing the metal Almontmurilonat and Alcaulinic, and the third contains a metal Almontmurilonat as a component of a single and this gatherings marked facies Alsellsé transmitted. The fourth grouping contains minerals and Almontmurilonat Alalit Alcaulinic and in addition to metal chlorite, and this distinguishes the assembly units in overlapping clay and carbonate Sahnta Almtbkharc. And reflects the vertical distribution of clay minerals in the different sectors following the classification during the natural settling with the stability of other factors that play a role in the distribution of clay minerals and the different quantities, such as installation of the parent rock and climate, and mutation. |
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Publishing Year |
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1423 AH
2003 AD |
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Added Date |
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Wednesday, April 30, 2008 |
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Researchers
| رشدي جمال عبدالغني | abdulghani, rushdi jamal | Investigator | Doctorate | |
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