Date:
Wed, 18/01/202312:00-13:30
Location:
Danciger B Building, Seminar room
Lecturer: Nadav Lensky (Geological Survey of Israel and HUJI - Earth Sci.)
Abstract:
Evaporitic layers (salt rocks) form due to evaporation of salt saturated hypersaline brines in dry regions. This mass balance approach explains well observations from shallow ponds, e.g. salt production in industrial ponds is limited to the dry season. However, in the Dead Sea (280m meter deep) this approach do not provide explanation for the seasonal and spatial variations of salt deposition. I will present in situ observations and show that once we account for heat and mass balances and transport and for the dependence of saturation and density in temperature and salinity - things fall into a coherent explanation. We further imply the insights gained from the Dead Sea to ancient deposits, since it is the closest modern analogue for the large scale salt deposits. In the course of the seminar, I will cover the processes from top down; from the air water interactions, through the major processes in the water column to the accumulated salt sediment in the lake bed.
Abstract:
Evaporitic layers (salt rocks) form due to evaporation of salt saturated hypersaline brines in dry regions. This mass balance approach explains well observations from shallow ponds, e.g. salt production in industrial ponds is limited to the dry season. However, in the Dead Sea (280m meter deep) this approach do not provide explanation for the seasonal and spatial variations of salt deposition. I will present in situ observations and show that once we account for heat and mass balances and transport and for the dependence of saturation and density in temperature and salinity - things fall into a coherent explanation. We further imply the insights gained from the Dead Sea to ancient deposits, since it is the closest modern analogue for the large scale salt deposits. In the course of the seminar, I will cover the processes from top down; from the air water interactions, through the major processes in the water column to the accumulated salt sediment in the lake bed.