Experimental petrology: a new insight into the deep Earth composition
Loading...
Date
2012-10
Authors
Advisor
Editor
Journal Title
Journal ISSN
Volume Title
Publisher
Mineralogical Society of Poland
Title alternative
Abstract
Meteorites remain the main data source for inferring deep Earth composition
(McDonough 2003; Palme, O’Neill 2003) whereas seismic waves give fundamental
information on the structure of our planet (Bina 2003; McDonough 2003). However, the
constant development of high pressure methods in recent decades has allowed us to
simulate core and mantle conditions on the surface of the Earth. As a consequence, we can
examine the mineralogical composition, crystal structure and physical structure of
experimental samples of a meteorite composition and compare these features to those
which are expected from geophysical and computational data (Li, Fei 2003).
Two main approaches are used to reach high pressure conditions. One is maximizing
the force and second is minimizing the area. The first approach is based on the multianvil
press technology, and pressures up to 26 GPa can at present be achieved in a moment (Frost
et al. 2004). The second approach is connected with the use of diamond anvil cells. It
allows us to reach pressures greater than 365 GPa (Bassett 2009) which correspond to the
pressure in the centre of the Earth. In the presented poster, an explanation of the two
methods mentioned above will be followed by a review of experimental results obtained
through application of these techniques in the last decade.
Description
Sponsor
Keywords
experimental petrology, Earth's structure
Citation
Ciążela, J. (2012). Experimental petrology: a new insight into the deep Earth composition. 19th meeting of the Petrology Group of the Mineralogical Society of Poland, Obrzycko, October 19-21, 2012, Mineralogia special papers 40, 69.