Dating of late Pleistocene and Holocene fluvial sediments Using OSL, Uranium series and ۱۴C methods in the Saqqez River, Iran
محل انتشار: مجله بررسی زمین پایدار، دوره: 1، شماره: 2
سال انتشار: 1399
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 157
فایل این مقاله در 13 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_SUER-1-2_004
تاریخ نمایه سازی: 22 شهریور 1400
چکیده مقاله:
Fluvial sediment dating surveys are one of the quaternary researches which can help to explicit many environmental issues. In the present study, samples taken to direct age determination belong to a depositional profile located in one of the tributaries of Saqqez River. This profile is located at southwest of Saqqez city and at the outlet of Saqqez basin. The OSL method was used to determine the age of three samples including sandy lens, floodplain and conglomerate sediments. ۱۴C and U/Th methods was applied to dating of the charcoal in conglomerate sediments and pedogenic/ cement carbonates respectively. The age of the unit is constrained by OSL dating of a sandy lens, at the base of the profile, at ۶۸.۳۵±۹.۵۰ ka and the overlying floodplain deposits at ۲۶.۷۶±۶.۹۶ ka (i.e. Late Pleistocene). Floodplain consolidated sediment (conglomerate) has been OSL dated at ۵.۷۹±۱.۸۸ ka which belongs to Mid-Holocene period. Concerning the fluvial sediments ages by the U/Th method, it should be noted that since the ratio of thorium to uranium was much higher than its standard value in both pedogenic and cement carbonate samples, it is not possible to determine the age of carbonate samples using the uranium series method. The calendar age reported by ۱۴C is around ۱۹۹۵, looks enigmatic considering the context from which the sample has been collected and the time required for crystallization of the enclosing carbonate cements. Therefore, it seems that among the different methods of fluvial sediment absolute dating methods, luminescence is more suitable for quaternary fluvial sediments dating in Saqqez River basin.
کلیدواژه ها:
Dating Fluvial sediments OSL Saqqez River
نویسندگان
Khabat Derafshi
Department of Natural Heritage, Research Institute of Cultural Heritage and Tourism, Tehran, Iran
مراجع و منابع این مقاله:
لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :