کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6349550 1622150 2015 18 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Seawater temperatures and carbon isotope variations in central European basins at the Middle-Late Jurassic transition (Late Callovian-Early Kimmeridgian)
ترجمه فارسی عنوان
دماهای دریایی و تغییرات ایزوتوپهای کربن در حوضه های اروپای مرکزی در گذرگاه ژوراسیک میانه و پایانی (کالیفرنیا قرن نوزدهم)
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی
The belemnite and brachiopod isotope data confirm that the carbon isotope composition of belemnite rostra is affected by a metabolic effect, which results in a depletion of belemnite calcite in the 13C isotope. Belemnite rostra are considered, nevertheless, as a valuable tracer of temporal variations in the carbon isotope composition of marine carbonates. Belemnite δ13C data show the presence of two positive excursions (in the Upper Callovian and the Middle Oxfordian) in the carbon isotope record of peri-Tethyan carbonates. The excursions are divided by a Lower Oxfordian interval characterized by decreased δ13C values. This is most likely a regional feature caused by upwelling. Lowest belemnite and brachiopod δ13C values are observed in the lower part of the Submediterranean Upper Oxfordian and are linked to a well-mixed state of the seawater in the basins studied. The carbon isotope record of bulk carbonates differs from those of belemnites and brachiopods probably because of strong variations in carbonate production in the Polish Jura Chain basin.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Palaeogeography, Palaeoclimatology, Palaeoecology - Volume 440, 15 December 2015, Pages 506-523
نویسندگان
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