کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4469298 1622366 2006 21 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Reconstructing the evolution of the latest Pennsylvanian–earliest Permian Lake Odernheim based on stable isotope geochemistry and palynofacies: A case study from the Saar-Nahe Basin, Germany
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Reconstructing the evolution of the latest Pennsylvanian–earliest Permian Lake Odernheim based on stable isotope geochemistry and palynofacies: A case study from the Saar-Nahe Basin, Germany
چکیده انگلیسی

Finely laminated sediments archived the evolution of the latest Pennsylvanian–earliest Permian Lake Odernheim, Saar-Nahe Basin, Germany. A succession of evolutionary stages can be distinguished based on variable carbonate carbon (− 5 to + 2‰) and oxygen (− 7 to + 5‰) isotopic compositions of dolomite. Sedimentary organic matter represents primarily a mixture of detrital vascular plant material (δ13C around − 21‰) and lake derived photosynthetic algal matter (δ13C around − 27‰). This distinction based on organic carbon isotopes is further supported by palynofacies analyses and Rock-Eval data. An additional contribution from bacterial biomass is likely. Bacterial sulphate reduction, and thus anaerobic remineralization of sedimentary organic matter, is indicated by the presence of sedimentary pyrite.Observed geochemical changes are attributed to temporal variations in the water balance of Lake Odernheim, including times of stronger evaporation as well as times showing substantial input of freshwater.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 240, Issues 1–2, 6 October 2006, Pages 204–224
نویسندگان
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