Caribbean chronostratigraphy refined with U-Pb dating of a Miocene coral
Author:
Publisher
Geological Society of America
Subject
Geology
Reference24 articles.
1. Porites corals from Crete (Greece) open a window into Late Miocene (10Ma) seasonal and interannual climate variability
2. The half-lives of uranium-234 and thorium-230
3. New TIMS constraints on the uranium-238 and uranium-234 in seawaters from the main ocean basins and the Mediterranean Sea 1 1Throughout the paper we use the δ234U notation which represents the deviation of the measured 234U/238U atomic ratio from the 234U/238U atomic ratio at secular equilibrium: δ234U=1000×[(234U/238U)/(234U/238U)eq−1], where (234U/238U)eq is the ratio of the two decay constants: λ238=1.5513×10−10 year−1 (Jaffey et al., 1971) and λ234=2.826×10−6 year−1 recently revised by Cheng et al. (2000). Therefore, an activity ratio of 1 equals (234U/238U)eq=λ238/λ234=54.89×10−6 in atomic ratio. This latter value is ∼3‰ different than the one previously used and thus data from the literature have been recalculated accordingly. All U concentrations are expressed in pmol/g (to be multiplied by 0.2380274 for comparison with some previous works which used ng/g; e.g. Chen et al., 1986).
4. 238U234U230Th232Th systematics and the precise measurement of time over the past 500,000 years
5. Improved chronostratigraphic reference curve of late Neogene seawater 87Sr/86Sr
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