Anomalous molybdenum isotope trends in Upper Pennsylvanian euxinic facies: Significance for use of δ98Mo as a global marine redox proxy
نویسندگان
چکیده
a Barrett, the Honors College and School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287‐1612, United States b School of Earth and Space Exploration, Arizona State University, Tempe, AZ 85287, United States c Department of Geology, University of Cincinnati, Cincinnati, OH 45221‐0013, United States d Department of Geological Sciences, Indiana University, Bloomington, IN 47405‐1405, United States e School of Earth and Space Exploration and Dept. of Chemistry & Biochemistry, Arizona State University, Tempe, AZ 85287, United States f Department of Earth & Environmental Sciences, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1
منابع مشابه
Seawater redox variations during the deposition of the Kimmeridge Clay Formation, United Kingdom (Upper Jurassic): Evidence from molybdenum isotopes and trace metal ratios
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This paper presents the first study of Tl isotopes in early diagenetic pyrite. Measurements from two sections deposited during the Toarcian Ocean Anoxic Event (T-OAE, 183 Ma) are compared with data from Late Neogene (<10 Ma) pyrite samples from ODP legs 165 and 167 that were deposited in relatively oxic marine environments. The Tl isotope compositions of Late Neogene pyrites are all significant...
متن کاملMo–total organic carbon covariation in modern anoxic marine environments: Implications for analysis of paleoredox and paleohydrographic conditions
[1] Sedimentary molybdenum, [Mo]s, has been widely used as a proxy for benthic redox potential owing to its generally strong enrichment in organic-rich marine facies deposited under oxygen-depleted conditions. A detailed analysis of [Mo]s–total organic carbon (TOC) covariation in modern anoxic marine environments and its relationship to ambient water chemistry suggests that (1) [Mo]s, while use...
متن کامل7 . 10 . 6 . Mo and U Geochemistry and Isotopes
The molybdenum and uranium isotopic systems can potentially be used to reconstruct the oxidation state of an ancient the global ocean as recorded in the FAR-DEEP samples. As previous studies have shown (e.g. Anbar et al. 2007; Kendall et al. 2010), the use of multiple proxies can help lift uncertainties and avoid the pitfalls associated with the use of a single redox proxy. Molybdenum is the mo...
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