Utilising 3-D magnetotelluric models of southern African mantle to constrain hydrogen content and compositional variations.

Sinan Özaydın.; Kate Selway

doi:10.1080/22020586.2019.12073137

2nd Australasian Exploration Geoscience Conference: Data to Discovery

ISSN: 2202-0586
E-ISSN:

oa Utilising 3-D magnetotelluric models of southern African mantle to constrain hydrogen content and compositional variations.
Authors Sinan Özaydın.^a and Kate Selway^b
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^a Department of Earth and Planetary Sciences, Macquarie University, , Sydney, 12 Wally’s Walk, 2109, , NSW, . [email protected] ^b Department of Earth and Planetary Sciences, Macquarie University, , Sydney, 12 Wally’s Walk, 2109, , NSW, . [email protected]
Publisher: Australian Society of Exploration Geophysicists
Source: ASEG Extended Abstracts, Volume 2019, Issue 2nd Australasian Exploration Geoscience Conference: Data to Discovery, Dec 2019, p. 1 - 3
DOI: https://doi.org/10.1080/22020586.2019.12073137
- Published online: 01 Dec 2019

Abstract

Summary

The magnetotelluric method is the most sensitive geophysical tool in detecting the hydration state of the mantle. Therefore, improved interpretations of electrical conductivity distribution within the Earth is a key measure that has to be taken in order to have a better grasp on lithopsheric-scale geodynamic concepts and the nature of mineralising agents. Progress towards this goal requires detailed comparisons between MT models and xenolith data in order to understand the controls on mantle electrical conductivity.

In this study, new magnetotelluric models from southern Africa were utilised to constrain the composition and hydrogen content by comparing forward models based on the experimental studies made on mantle minerals at high P-T conditions. Many relations between the experimental parameters and information from xenolith data were tested to improve the capabilities of magnetotellurics as an exploration tool in the lithospheric mantle of cratons.

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2019-12-01

2026-01-19

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References

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/content/journals/10.1080/22020586.2019.12073137

Article Type: Research Article

Keyword(s): electrical conductivity; kimberlite; magnetotellurics; metasomatism; South Africa; xenoliths

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oa Utilising 3-D magnetotelluric models of southern African mantle to constrain hydrogen content and compositional variations.

Abstract

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