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Novel investigation in isotope geochemistry and cosmochemistry based on thermal ionization and inductively coupled plasma mass spectrometry

English title Novel investigation in isotope geochemistry and cosmochemistry based on thermal ionization and inductively coupled plasma mass spectrometry
Applicant Wieler Rainer
Number 121985
Funding scheme Project funding (Div. I-III)
Research institution Institut für Geochemie und Petrologie ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Geochemistry
Start/End 01.10.2008 - 31.05.2011
Approved amount 530'470.00
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Keywords (11)

Isotope geochemistry; cosmochemistry; early solar system; ICP-MS; ice core dating; volatile depletion; solar system; volatile; U-series; magma production; magma chamber

Lay Summary (English)

Lead
Lay summary
This project focuses on new investigations in isotope geochemistry based both on multiple collector ICP-MS and thermal ionization mass spectrometry (TIMS) at the Institute of Isotope Geochemistry and Mineral Resources, ETH Zurich. We will investigate the processes associated with the early evolution of the solar system with a special focus on the explanation of volatile element loss and how it relates to accretion and impacts during the growth of small and large planets. We will measure with a high precision the Rb-Sr isotope clock of a large range of planetary objects by TIMS. This will provide new insights into the chronology and processes of volatile loss. These observations will be combined with other isotope investigations that will take place during this project.We are also exploring two new areas in U-series geochemistry. We have developed a new method for ice-core dating based on the ejection of U daughter products from dust particles trapped in the ice. This method has provided the first radiometric ages for old ice core samples and should be extremely useful for understanding better the climate record provided by ice cores. This methodology will give rise to a large number of applications and the project is conducted in collaboration with the group of T. Stocker at the University of Bern.We are also investigating the U-series systematics in minerals produced by crystallization of magma to better constrain the timescale of cooling of magma chambers as well as the speed of magma crystallization by analyzing U-series in situ. This will provide unique constraints on the evolution of large magma chambers. In addition, we will investigate how mantle rocks and basalts (from Iceland) can be used to constrain the process of melt production and extraction from the mantle.
Direct link to Lay Summary Last update: 21.02.2013

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Associated projects

Number Title Start Funding scheme
113625 New investigation in isotope geochemistry and cosmochemistry based on thermal ionization and inductively coupled plasma mass spectrometry 01.10.2006 Project funding (Div. I-III)

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