Sea Level Changes in Northern Part of the Persian Gulf During Holocene

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• 作者：Razyeh Lak ; ^{lak@ries.ir" class="auth_mail}
• 关键词：Sea Level Change ; Holocene ; Persian Gulf ; Core ; paleogeography.
• 刊名：Procedia - Social and Behavioral Sciences
• 出版年：19 March, 2014
• 年：2014
• 卷：120
• 期：Complete
• 页码：757-763
• 全文大小：776 K

文摘

The Persian Gulf is a sedimentary epicontinental and marginal basin located in a dry climate. The climate, morphology, hydrology, current, waves and tide specifications determine its sediments鈥?types. To study the paleoceanography of the Persian Gulf, a core having the length of 15m from shallow water close to the coastal areas of Bushehr in form of an undisturbed sample was prepared. After cutting the sample, macroscopic verifications, photography, and description of cores, 50 subsamples were prepared and granulometry and ICP analyses implemented. Results obtained by granulometry and percentage of particles, plus outcomes of chemical analysis and microscopic observations indicate that there is a positive correlation between calcium value and particle sizes. It means when Ca value increases, the percentage of sand also increases. In comparison with sedimentary facies, Ca value is similar to coastal and continental facies. When facies are marine, particle sizes decrease, but the values of Al, Mg, Na and K increase. In fact, rising of the Sea level is along with decrement of particle sizes, and increment of clay minerals, like Al, Si, K & Mg. But Ca value is increased by decrement of sea water level and increment of particle sizes. Therefore, when seawater level is high, the minimum of Sea level conditions occurred in 204, 396, 516 and 673 centimeters from the surface. The Maximum of Sea levels has been seen in 280, 510,593 and from 714 to 140 centimeters below the surface.