کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
11024665 | 1701097 | 2018 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Controls of eustasy and diagenesis on the 238U/235U of carbonates and evolution of the seawater (234U/238U) during the last 1.4 Myr
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موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
ژئوشیمی و پترولوژی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Controls of eustasy and diagenesis on the 238U/235U of carbonates and evolution of the seawater (234U/238U) during the last 1.4 Myr Controls of eustasy and diagenesis on the 238U/235U of carbonates and evolution of the seawater (234U/238U) during the last 1.4 Myr](/preview/png/11024665.png)
چکیده انگلیسی
The δ(234U) data suggest that the (234U/238U) ratio of the seawater has remained within â¼20â° of the modern seawater value during the last 1-1.4 Myr. Furthermore, we find that small-scale (1-15â°) variations in seawater δ(234U) mirror sea-level changes during the penultimate glacial-interglacial period (â¼140 to â¼200â¯ka), thus confirming the record of lower δ(234U)SW during periods of low sea-level stand and expanding it to at least the last two glacial-interglacial events (i.e., â¼0.23â¯Ma). Such fluctuations in δ(234U)initial values should be taken into account when screening carbonate sediments U-Th ages on the basis of the initial (234U/238U) ratios of the samples.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Geochimica et Cosmochimica Acta - Volume 242, 1 December 2018, Pages 233-265
Journal: Geochimica et Cosmochimica Acta - Volume 242, 1 December 2018, Pages 233-265
نویسندگان
François L.H. Tissot, Cindy Chen, Benjamin M. Go, Magdalena Naziemiec, Garrett Healy, Andrey Bekker, Peter K. Swart, Nicolas Dauphas,