کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5770188 1629203 2017 13 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The loess deposits of Buca Dei Corvi section (Central Italy): Revisited
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
The loess deposits of Buca Dei Corvi section (Central Italy): Revisited
چکیده انگلیسی


- A multiproxy environment reconstruction from Late Glacial deposit of Central Italy is proposed.
- Pedogenic features, land snail association and stable isotopes indicate dry climate condition.
- δ18O values of pedogenic carbonates indicate that δ18O of precipitation was higher than present.

Loess deposits have been described in the past for the upper section of Buca Dei Corvi succession (Central Italy). In this paper the deposits were re-analysed to clarify the depositional environment and to attempt a paleoclimate reconstruction. Two radiocarbon dates on pedogenic carbonate constrain the ages to the Late Glacial, and are consistent with previous OSL dating of the top of the succession. The non-marine mollusc assemblage shows typical character of cold and dry climatic conditions, testified by strong oligotypical composition. Mineralogy and geochemistry of the sediments indicate the abundant presence of exotic quartz mineral which can be explained only by wind transport. Probably, wind transport was also responsible of deposition of carbonate which then dissolved and re-precipitated producing pedogenic concretions. Stable isotopes (13C/12C and 18O/16O ratios) of the concretions are consistent with a climate drier than present conditions, with an environment characterized by sparse vegetation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: CATENA - Volume 151, April 2017, Pages 225-237
نویسندگان
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