Archive for July 2010

Earthquake damage scenarios for Istanbul

July 26, 2010

Ansal et al., from Bogazici University, published a research study about a methodology for seismic microzonation and earthquake damage scenarios.  A pilot study is carried out to evaluate seismic damage in a district in Istanbul, which showed the significance of site characterization and site response analysis. Their results can be found in the journal of Soil Dynamics and Earthquake Engineering. doi:10.1016/j.soildyn.2010.06.004

Photo by Enric Marti (AA)

40Ar/39Ar geochronology of volcanic rocks in the Western Turkey

July 26, 2010

A new paper by Karaoglu et al. appeared in the Lithos about the petrogenesis and 40Ar/39Ar geochronology of volcanic rocks in Usak – Gure Basin, in the Western Turkiye! They published a new chronology for the volcanic rocks exposed on the northern margin of the Menderes Massif. According to their results, the oldest volcanic units are about 17-16 million years old, which indicate the volcanism active during the latest Early Miocene. The youngest ages were found to be around 12 million years old. doi:10.1016/j.lithos.2010.07.001

Photograph by Steve Mattox

Coastlines of Turkey

July 6, 2010

A new book chapter about the geomorphological features of Turkish coastlines appeared in the Encyclopedia of the World’s Coastal Landforms by Springer. It is the re-edited version of previously published chapter from The World’s Coasts: Online (2003) written by the famous geomorphologist Prof. Oguz Erol. It is a nice reference chapter to keep in mind. doi:10.1007/978-1-4020-8639-7_10.1

Lake shrinkings from Southwest Turkey

July 1, 2010

Source: Hurriyet news

Coastline changes of Aksehir and Eber Lakes (SW, Turkey) have been investigated by Sener et al. from Suleyman Demirel University, Isparta, using multi-temporal satellite images since 1975. According to their results, published in the Journal of Water Resources Management, the surface area and volume of these two lakes have been decreased significantly. The Aksehir Lake was even dried up completely during the summer of 2008. doi:10.1007/s11269-009-9467-5

High-level arsenic values from Simav aquifers, Western Turkey

July 1, 2010

A paper, published in the Journal of Water, Air & Soil Pollution by Gunduz et al from Dokuz Eylul University, Izmir, presents findings about the high-level arsenic values from two aquifers (~natural water storages under the ground) of Simav Plain, Kutahya. Water sampling from 27 wells yielded an average arsenic concentration of 99.1 µg/L with a maximum of 561.5 µg/L (exceeding several orders of magnitude of the national and international standards which is about 10 µg/L).  Natural sources and anthropogenic influences of arsenic (by mining activities) were found to be the source of high concentrations. doi:10.1007/s11270-009-0055-3