Storage of Volatiles in the Mantle Lithosphere: Time-scales, sources and processes. Fragments of the Earth's mantle (xenoliths), transported to surface by deep-seated volcanics, record the injection of fluids through formation of volatile-bearing minerals (mantle metasomatism). This project will 1) test the hypothesis that timescales of mantle volatile storage can be determined using noble gas (laser probe) dating techniques, and 2) determine the sources and processes involved in volatile stor ....Storage of Volatiles in the Mantle Lithosphere: Time-scales, sources and processes. Fragments of the Earth's mantle (xenoliths), transported to surface by deep-seated volcanics, record the injection of fluids through formation of volatile-bearing minerals (mantle metasomatism). This project will 1) test the hypothesis that timescales of mantle volatile storage can be determined using noble gas (laser probe) dating techniques, and 2) determine the sources and processes involved in volatile storage, using halogen and noble gas geochemistry. A successful outcome will establish unique methods for dating mantle metasomatic events and determine the relationship between mantle and crust melting episodes, thus providing critical constraints on mantle evolution and Earth degassing models. Read moreRead less
High resolution warm ocean records from laminated sediment. This project will produce environmental records during ocean warming events in the geologic past to reveal processes associated with warm oceans similar to those anticipated in the coming century. New Australian technology allows investigation of sediment records at unprecedented time resolution providing insight into processes operating on societally relevant time scales of decades to centuries. This work will open an archive of climat ....High resolution warm ocean records from laminated sediment. This project will produce environmental records during ocean warming events in the geologic past to reveal processes associated with warm oceans similar to those anticipated in the coming century. New Australian technology allows investigation of sediment records at unprecedented time resolution providing insight into processes operating on societally relevant time scales of decades to centuries. This work will open an archive of climate information revealing feedback, thresholds and tipping points from past events previously inaccessible because of technical and conceptual limitations. It will provide critical inputs into models predicting future climate and to illuminate the risks and compensating feedbacks occurring with warming.
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