Mineralogy and Geochemistry of Sand Dunes of the Southern Coast of the Caspian Sea

Authors

  • Arash Amini University of Golestan
  • Gholamreza Mirab Shabestari University of Birjand
Abstract:

Babolsar eastern coastal dunes have been developed along the southern coast of the Caspian Sea. The studied area is coordinated in N36°43' to N36°44' latitude and E52°44' to E52°52' longitude. The objectives of this research were to: Study mineralogy and geochemistry of sand dunes, to obtain chemical alteration index (CIA) and its relationship to climate and mineralogy, to determine the potential accumulation of heavy minerals and trace elements and to identify sedimentary processes, climate, source rock geochemistry and mineralogy of the deposits. In this research, 43 dune samples were collected from 4 different areas of coastal dunes, out of which 14 samples were analyzed using X-ray fluorescence method (XRF) for major oxides and trace elements. A comparison was made between sand dunes, river and beach. To increase the accuracy of the mineralogical study of sediments, 7 microscopic thin sections were prepared. The mineralogical analysis of the coastal sand dunes indicates that the average amounts of quartz, feldspar and rock fragments found in these samples are 29.56%, 7.42% and 63.02%, respectively. Much of the rock fragments were respectively sedimentary, volcanic, plutonic and finally metamorphic rock fragments with the lowest amounts. The abundance of carbonate sedimentary rock fragments in Babolsar coastal sand dunes can be caused by proximity to the carbonate source rock. The average amount of chemical alteration observed in coastal dunes of Babolsar was 89.39%, which is similar to coastal dunes of Miankaleh (=88.44%). It seems that warm and humid climates predominate in both of Miankaleh and Babolsar coastal sand dune areas. The concentration of TiO2, Fe2O3, MgO and heavy minerals in the coastal dunes of Babolsar were reduced eastward. This pattern of decreasing main oxides of iron, titanium and magnesium with the direction of prevailing winds in the area from west to east is in agreement and proves that the distribution pattern of major oxides which form dark heavy minerals in the sand dune samples have been more affected by the prevailing winds in the region.

Upgrade to premium to download articles

Sign up to access the full text

Already have an account?login

similar resources

the effect of taftan pozzolan on the compressive strength of concrete in the environmental conditions of oman sea (chabahar port)

cement is an essential ingredient in the concrete buildings. for production of cement considerable amount of fossil fuel and electrical energy is consumed. on the other hand for generating one tone of portland cement, nearly one ton of carbon dioxide is released. it shows that 7 percent of the total released carbon dioxide in the world relates to the cement industry. considering ecological issu...

morphology, geochemistry, mineralogy, and micromorphology of soils of hormozgan province in relation to parent materials

ویژگی های زمین شیمیایی، کانی شناسی، و میکرومورفولوژیکی خاک ها و سنگ مادر مربوطه در منطقه بین بخش های جنوبی زاگرس و خلیج فارس تا دریای عمان(استان هرمزگان، ایران) مورد بررسی قرار گرفت. هدف های این مطالعه شناسایی تغییرات در خصوصیات فیزیکی، شیمیایی، و ترکیب کانی شناسی خاک، مطالعه میکرومورفولوژی و تکامل خاک، و بررسی توزیع عنصر خاک بر اساس هوازدگی، پروسه های خاک و زمین شناسی جهت توصیف اثرات مواد مادر...

15 صفحه اول

the analysis of the role of the speech acts theory in translating and dubbing hollywood films

از محوری ترین اثراتی که یک فیلم سینمایی ایجاد می کند دیالوگ هایی است که هنرپیش گان فیلم میگویند. به زعم یک فیلم ساز, یک شیوه متأثر نمودن مخاطب از اثر منظوره نیروی گفتارهای گوینده, مثل نیروی عاطفی, ترس آور, غم انگیز, هیجان انگیز و غیره, است. این مطالعه به بررسی این مسأله مبادرت کرده است که آیا نیروی فراگفتاری هنرپیش گان به مثابه ی اعمال گفتاری در پنج فیلم هالیوودی در نسخه های دوبله شده باز تولید...

15 صفحه اول

construction and validation of the translation teacher competency test and the scale of students’ perceptions of translation teachers

the major purpose of this study was to develop the translation teacher competency test (ttct) and examine its construct and predictive validity. the present study was conducted in two phases: a qualitative phase as well as a quantitative phase. in the first phase of the study, the author attempted to find out the major areas of competency required for an academic translation teacher. the second...

the impact of attending efl classes on the level of depression of iranian female learners and their attributional complexity

می توان گفت واقعیت چند لایه ا ی کلاس های زبان انگلیسی بسیار حائز اهمیت است، زیرا عواطف و بینش های زبان آموزان تحت تاثیر قرار می گیرد. در پژوهش پیش رو، گفته می شود که دبیران با در پیش گرفتن رویکرد فرا-انسانگرایی ، قادرند در زندگی دانش آموزانشان نقش مهمی را ایفا سازند. بر اساس گفته ی ویلیامز و بردن (2000)، برای کرل راجرز، یکی از بنیان گذاران رویکرد انسانگرایی ، یادگیری بر مبنای تجربه، نوعی از یاد...

My Resources

Save resource for easier access later

Save to my library Already added to my library

{@ msg_add @}


Journal title

volume 6  issue 19

pages  29- 42

publication date 2015-03

By following a journal you will be notified via email when a new issue of this journal is published.

Keywords

Hosted on Doprax cloud platform doprax.com

copyright © 2015-2023