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    Mineralogical and geochemical features of colored benthic foraminifers from Aegean and southwestern coasts of Turkey
    (MICRO PRESS, 2008) Yalcin, Huseyin; Meric, Engin; Avsar, Niyazi; Tetiker, Sema; Barut, Ipek F.; Yilmaz, Sener; Dincer, Feyza
    We studied a total of 24 genera and 41 species of modern benthic foraminifers with colored shells from 49 samples collected from the Gokceada region. Southwestern Bozeaada, eastern Mitilini in the northeast Aegean Sea and from different points along the shores of southwest Antalya. d((104)) reflection and MgCO3 content of shell calcite vary between 2.979-3.035 angstrom and 0.33-19.00 mole%, respectively. Mg/Ca and Sr/Ca ratios of whole shells range between 2.95-51.51 and 1.45-10.44 [mmol/mol]. These values are normalized to maximum and minimum concentrations in chemical analyses from whole shells and shell surfaces in colored and colorless foraminifers. Enrichments in metallic elements seem to be related to absorption depending on qualitative and quantitative measurements of shell structures, although variations are also related to mineralogical composition of shells. Hypothetically ions transferred with hot waters from active faults on the sea-floorand/or the ions transported with cold water runoff from land may cause abnormal enrichment of some metals within foraminifer shells and/or secondary metabolic enrichment of foraminifer shells during life.
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    Recent Colored Benthic Foraminifers and Their Mineralogical and Geochemical Features in the Aegean and Southwestern Mediterranean (Gokceada-Bozcaada-Mitilini Islands and Antalya) Coasts
    (Tmmob Jeoloji Muhendisleri Odasi, 2006) Yalcin, Huseyin; Meric, Engin; Avsar, Niyazi; Tetiker, Sema; Barut, Iper F.; Yilmaz, Sener; Dincer, Feyza
    This study was performed on the recent fbraminiftral samples of totally 49 collected from Gokceada surroundings, southwestern Bozcaada, eastern Mitilini in the northeast of Aegean Sea and in different points of shores in the southwest of Antalya. Total 24 genus and 41 species of foraminifers with colored shells were distinguished in the four regions. d((104)) reflection and MgCO3 contents) of calcites vary between 2.979-3.035 angstrom and 0.33-19.00 % mole, respectively Mg/Ca and Sr/Ca ratios of whole shells have values of 2.95-51.51 and 1.45-10.44. The values are normalized by considering maximum and minimum concentrations are respectively due to colorful and colorless foraminifer shells in the chemical analyses from whole shells and their surfaces. The enrichments in amounts of particularly metallic elements concern with absorption depending on qualitative and quantitative of shell structures although the variations are also related to mineralogical compositions of shells. It can be considered that the ions transferred into hot waters coming from active faults in the sea floor and/or the ions transported with cold waters releasing from land are enriched in the sea, and finally they caused an abnormal contamination within the shells and/or secondarily richness during metabolism by livings.