پديدآورندگان :
Lankarani Mohammad mlankarani@ut.ac.ir School of Geology, University-College of Science, University of Tehran, Tehran, Iran; , Motavalli-Anbaran Seyed Hani motavalli@ut.ac.ir Institute of Geophysics, University of Tehran, Tehran, Iran; , Ranjbaran Mohsen ranjbaran@khayam.ut.ac.ir School of Geology, University-College of Science, University of Tehran, Tehran, Iran; , Tudryn Alina alina.tudryn@u-psud.fr 3GEOPS, Univ. Paris-Sud, CNRS, Université Paris-Saclay, Rue du Belvédère, Bât. 504-509, 91405, Orsay, France; , Tucholka Piotr 3GEOPS, Univ. Paris-Sud, CNRS, Université Paris-Saclay, Rue du Belvédère, Bât. 504-509, 91405, Orsay, France; piotr.tucholka@u- psud.fr , Ahmady-Birgani Hesam h.ahmadybirgani@urmia.ac.ir Faculty of Natural Resources, Urmia University, Urmia, Iran; , Motavalli Anbaran Seyed Jasser motavalli1393@ut.ac.ir Institute of Geophysics, University of Tehran, Tehran, Iran;
كليدواژه :
Core Sediments , Siliciclastic , Carbonate Facies , Lake Level , Holocene , Lake Urmia , Iran
چكيده فارسي :
The Urmia Lake, located in northwest Iran, has suffered from serious ecological and environmental disasters, mainly routed in the great decrease in the water inflow to the lake during the recent decades. The French-Persian project (started in 2016) is one the active projects aiming to rescue the lake and its surrounding areas. This study, as a part of that comprehensive project, focused on the upper Holocene siliciclastic and mixed siliciclasticcarbonate sediments of the lake in order to indicate evidences of the lake level fluctuations. Detailed facies analysis of the upper Holocene carbonate sediments of the Golman-Khaneh area (based on field observations and laboratory studies) has led to recognition of sandy ooid grainstone and peloid (fecal pellet) grainstone facies. Occurrence of carbonate/mixed siliciclastic carbonate facies in the overwhelmingly silicilcastic environment indicates reduction in sediment influx from the land and considerable climatologic aridity (along with lake level stand/fall) during the latest Holocene. Thinness of the carbonate strata in the studied succession can be attributed to short period of the mentioned climatic /lake level condition or the subsequent erosional phase.
