Mineralogy of Holocene Sediments from the Southwestern Black Sea Shelf (Turkey) in Relation to Provenance, Sea‐level and Current Regimes
作者： Emel BAYHAN , Mustafa ERGİN , Abidin TEMEL , Şeref KESKİN
DOI: 10.1111/J.1755-6724.2005.TB00922.X
关键词: Aragonite 、 Metamorphic rock 、 Chlorite 、 Provenance 、 Illite 、 Calcite 、 Geochemistry 、 Geomorphology 、 Siliciclastic 、 Dolomite 、 Geology
摘要: Grain size and mineral composition of core sediments were used to investigate influences various terrestrial marine conditions, which have prevailed on the southwestern Black Sea shelf during Holocene. Siliciclastic mud with small amounts sand gravel from nearby coastal hinterland is principal sediment type, whereas deposited near edge Istanbul Strait off Duru Lake (a paleo-river mouth) constitued large quantities both biogenic terrigenic origin. Variable aragonite, 1 nm-micas, quartz, feldspars, calcite dolomite constitute dominant non-clay minerals in bulk sediments. The clay assemblage < 2 µm fraction made up smectite, illite, kaolinite chlorite. Aragonite are mainly derived benthic accumulations, feldspars (mainly plagioclase) smectite reflect magmatic-volcanic provenance distribution nm-micas chlorite correlate metamorphic sources onland. Nevertheless, grain generally indicate a combination effects wind wave climate, longshore offshore cyclonic currents, changing sea-level stands source rock morphological conditions. It also suggested that at least part could be northwesterly Danube River input.
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