Late Quaternary environmental changes of Lake Urmia basin (NW Iran) inferred from sedimentological and magnetic records
| العنوان: | Late Quaternary environmental changes of Lake Urmia basin (NW Iran) inferred from sedimentological and magnetic records |
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| المؤلفون: | Mohammad Lankarani, Ting Kong, Elisabeth Gibert-Brunet, Alina Tudryn, Aurélie Noret, Marc Massault, Serge Miska, Piotr Tucholka, Hesam Ahmady-Birgani, Seyed-Hani Motavalli-Anbaran, Olivier Dufaure |
| المساهمون: | Géosciences Paris Saclay (GEOPS), Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), University of Tehran, Urmia University |
| المصدر: | Quaternary International Quaternary International, Elsevier, 2021, 589, pp.83-94. ⟨10.1016/j.quaint.2021.03.024⟩ |
| بيانات النشر: | HAL CCSD, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | Greigite, 010506 paleontology, Late Quaternary palaeoenvironments, Water level change, [SDE.MCG]Environmental Sciences/Global Changes, Carbonates, Magnetic minerals, Sediment, Lake Urmia, [SDU.STU]Sciences of the Universe [physics]/Earth Sciences, Structural basin, 010502 geochemistry & geophysics, 01 natural sciences, Water level, Diagenesis, Electric conductivity, 13. Climate action, Period (geology), Physical geography, Quaternary, Geology, Holocene, 0105 earth and related environmental sciences, Earth-Surface Processes |
| الوصف: | International audience; The ongoing changes affecting Lake Urmia (NW Iran) are revealed by the lake water level decrease (~7 m in the last 20 yr) that was attributed to natural and anthropogenic causes but the exact impact of these factors on the state of the lake is still not identified. Indeed, lack of detailed record of environmental evolution of the lake in the past limits the understanding of actual and future processes. Our project aims to obtain a high-temporal resolution record of environmental changes in the lake area for the last ~30 kyrs. Sediment cores have been obtained from the recently dried out part of the lake near Urmia City, and surface and ground waters have been measured for electric conductivity. This paper presents results of water and sediments analyses. Six 14 C AMS dating on organic fractions provide a chronological framework and indicate that the record covers the last ~30 cal kyr BP. During this period, evaporitic conditions were prevailing in the lake. The electric conductivity of brines from the sediment highlights changes in the lake water salinity. The data indicate a lake-level low stand at ~30 cal kyr BP that was followed by a water level rise and establishment of lacustrine conditions for the next ~9 kyr, this phase representing the highest lake level recorded since that time to date. From the LGM, the lake experienced several fluctuations of the water level. The relatively long-term lacustrine condition established during the Early Holocene before the water level decrease between ~5.5-4.9 cal kyr BP. Sediments from the two dry events at ~30 cal kyr BP and at 5.5-4.9 cal kyr BP are characterized by the presence of greigite, which indicates anaerobic early diagenetic conditions in the sediment. |
| اللغة: | English |
| تدمد: | 1040-6182 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::76be3545d81c6e36fb6d00d70e0a92f3 https://hal.archives-ouvertes.fr/hal-03454996 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....76be3545d81c6e36fb6d00d70e0a92f3 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 10406182 |
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