Sedimentary evolution and environmental history of Lake Van (Turkey) over the past 600 000 years

• DOI: 10.1111/sed.12118
• Publication Date: 2014-03-07T06:46:43Z
• Authors: Mona Stockhecke; Michael Sturm; Irene Brunner; Hans‐Ulrich Schmi...; Mari Sumita; Rolf Kipfer; Deniz Cukur; Ola Kwiecien; Flavio S. Anselmetti
• Keywords: Varve; Stadial; Silt; Terrigenous sediment; Lithostratigraphy

Abstract The lithostratigraphic framework of L ake V an, eastern T urkey, has been systematically analysed to document the sedimentary evolution and environmental history lake during past ca 600 000 years. lithostratigraphy chemostratigraphy a 219 m long drill core from an serve separate global climate oscillations local factors caused by tectonic volcanic activity. An age model was established based on climatostratigraphic alignment chemical lithological signatures, validated 40 Ar / 39 ages. drilled sequence consists 76% lacustrine carbonaceous clayey silt, 2% fluvial deposits, 17% volcaniclastic deposits 5% gaps. Six lithotypes were separated event such as volcaniclastics ( 300 layers) graded beds 375 layers), their depositional environments are documented. These are: (i) frequently intercalated with varved silts reflecting rising levels terminations; (ii) strong seasonality intralake oxic–anoxic boundary, for example, lake‐level highstands interglacials/interstadials; (iii) CaCO 3 ‐rich banded sediments which representative lowering level decreases glacial inceptions; (iv) ‐poor mottled boundary close sediment–water interface, lowstands glacials/stadials; (v) diatomaceous muds deposited early beginning fresh water system; (vi) sands gravels indicating initial flooding basin. recurrence lithologies follows five glacial/interglacial cycles. A 20 thick disturbed unit reflects interval major activity in at 414 ka bp . Although processes influenced sedimentation, pattern organic matter content clearly reflect changes, making outstanding terrestrial archive unprecedented sensitivity reconstruction regional over last