Project

Back to overview

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

English title New investigation in isotope geochemistry and cosmochemistry based on thermal ionization and inductively coupled plasma mass spectrometry
Applicant Bourdon Bernard
Number 113625
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 01.10.2006 - 30.09.2008
Approved amount 445'695.00
Show all

Keywords (11)

Isotope geochemistry; cosmochemistry; early solar system; ICP-MS; ice core dating; volatile depletion; U-series; mass spectrometry; high precision; Sr isotopes; ice core

Lay Summary (English)

Lead
Lay summary
This proposal requests partial support for 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 propose to measure with a higher 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 of that will take place during this project.
We will explore two new areas in U-series geochemistry. We will attempt to develop a new method for ice-core dating based on the ejection of U daughter products from dust particles trapped in the ice. This method should provide the first radiometric method for old ice core samples and should be extremely useful for understanding better the climate record provided by ice cores. This methodology could give rise to a large number of applications and the project will be conducted in collaboration with the group of T. Stocker at the University of Bern.We also propose to investigate 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 for the first time how mantle rocks can be used to constrain the process of melt extraction from the mantle.
A large part of the costs incumbed by this research project will be supported by ETH and by external sources of funding.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Associated projects

Number Title Start Funding scheme
121985 Novel investigation in isotope geochemistry and cosmochemistry based on thermal ionization and inductively coupled plasma mass spectrometry 01.10.2008 Project funding (Div. I-III)

-