應蘭州大學地質科學與礦產資源學院戴霜教授邀請，英國倫敦大學皇家霍洛威學院(Royal Holloway University of London) Alex Dickson博士訪問蘭州大學，并作學術報告。
報告人：Dr. Alex Dickson
題 目：Non-traditional isotopes and the chemical history of the oceans
Presentation outline: The development of non-traditional isotope geochemistry has opened up exciting new possibilities for tracing the evolution of ocean chemistry in response to the evolution of life and the continents throughout geological history. However, these new isotope systems require careful study so that data can be interpreted accurately in terms of past Earth processes. In this talk I will discuss recent developments in the cadmium isotope palaeoproxy. I will discuss new data from modern marine environments that allows us to understand the chemical controls on cadmium cycling, and will show two examples where cadmium isotopes have been applied to investigate palaeochemical change across the Late Cretaceous Oceanic Anoxic Event 2 and the Early Jurassic Toarcian Oceanic Anoxic Event. I will conclude by talking about what the future may hold for the use of cadmium, and other, isotopic approaches.
Biography of Dr. Alex Dickson: Lecturer in Geochemistry, Royal Holloway University of London. He got his PH Degree in University College London in 2009, and as post doctoral research Associate and Research Fellow in The Open University (2009-2012) and in University of Oxford (2012-2017). His research focuses on understanding the links between climate change and ocean chemistry across timescales of thousands to millions of years during the Phanerozoic. He has a particular interest in using non-traditional isotope systems such as molybdenum, uranium, cadmium, osmium, rhenium and zinc to track changes in Earth’s biogeochemical cycles. Recently, his research has included looking at the interface organic and inorganic geochemical techniques to understand the interactions between metals and organic matter in marine sedimentary deposits.
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