Advances in Earth Science ›› 2004, Vol. 19 ›› Issue (2): 237-244. doi: 10.11867/j.issn.1001-8166.2004.02.0237
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FU Yazhou 1,2, PENG Jiantang 1, SHI Xuefa 3
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FU Yazhou, PENG Jiantang, SHI Xuefa. PROGRESS OF RESEARCH ON OSMIUM ISOTOPE IN MARINE ENVIRONMENT[J]. Advances in Earth Science, 2004, 19(2): 237-244.
Os isotope possesses the higher sensitivity in dating and tracing in marine environment in comparison with other isotopes, and can provide some important information that other isotopes cannot give. Therefore, an increasing attention has been paid to the application of Os isotope in marine sciences in recent years. Some important progresses of the Os isotope application in this aspect are summarized as follows: Firstly, Os isotope composition of Co-rich crust, ferromanganese nodule, organicrich marine sediments, metalliferous carbonates and pelagic clay had been determined by many researchers. Secondly, the Os concentration and residence time in seawater, and Os isotope composition of seawater were precisely measured. Thirdly, the evolution curve of the Os isotopic composition in seawater over the past 80 million years has been roughly constructed. Fourthly, the Osmium isotope composition of the abyssal peridotites, oceanic basalts, rocks in subduction zones and hydrothermal fluids from the Mid-Ocean ridge had been determined. Finally, the constraint factors on the Os isotope composition of seawater were systematically discussed, and some significant implications of the Os isotope compositions in the marine environment for palaeoceanography, palaeoclimatology and palaeogeography had been revealed. The progresses of Os isotope in the marine environment in recent years have been summarized in this review, which may benefits our study on Os isotope in the future.