Melting in the Deep Earth (NERC grants NE/I010734/1 and NE/I010947/1)

Published paper from grant NE/I010734/1, Modeling the melting of multicomponent systems: the case of MgSiO3 perovskite under lower mantle conditions by Cono Di Paola and John P. Brodholt doi: 10.1038%2Fsrep29830 Two published papers from NERC grant NE/I010947/; Thomson et al AmMin 2014 Experimental Determination of Melting in the systems Enstatite-Magnesite and Magnesite-Calcite from 15 to 80 GPa http://dx.doi.org/10.2138/am.2014.4735 Lord et al EPSL 2014 The Melting Curve of Ni to 1 Mbar http://dx.doi.org/10.1016/j.epsl.2014.09.046 Grant Abstract: Melting in the Earth has a huge effect on its chemical and physical state. For instance, the chemistry of the crust, the mantle and the atmosphere are largely controlled by melting and crystalisation at mid-ocean ridges, hotspots or island arcs. There has, therefore, been an enormous effort in the last decades to understand these shallow melting processes. Yet much deeper melts may have been equally influential in the evolution of the Earth. For instance, it is generally accepted that a deep magma ocean perhaps extending to the Earth's centre, existed early its history. This was the result of multiple impacts as the Earth accreted. From this magma ocean, iron melts separated from silicate melts to form the core, volatiles degassed to form an early atmosphere, and a proto-crust may have formed. It is also accepted that the Earth was hit by a Mars-sized body to create the moon; this too would have caused enormous amounts of melting in the deep Earth. Moreover, there is some evidence for melting in the deep Earth now. It is possible, therefore, that melts in the deepest Earth have existed throughout Earth's history. However, many basic data on the physical and chemical properties of deep melting do not exist. For instance, we don't know the melting curves for mantle minerals and rocks at the pressure and temperatures of the deep Earth. We don't know which minerals crystalise from these melts first (the liquidus phases). We don't know the composition of partial melts of deep mantle rocks or rocks which have been subducted. We don't know the relative densities of the rocks and their melts, and so we do not even know whether minerals float of sink in these deep melts. This lack of data has led to much speculation on the effect of deep melts on the Earth's evolution. For instance, it has been suggested that geophysical and geochemical anomalies in the Earth's mantle have deep early melts as their origin. But these models depend of the chemical and physical properties of the melts and crystalline solids, properties that are simply not known. This project will use novel experiments in conjunction with ab initio modelling obtain these data. The data will provide the chemical and physical foundation on which all future models of the Earths early crystallization and subsequent evolution will be based.

Simple

Date (Publication)
2014-12
Citation identifier
http://data.bgs.ac.uk/id/dataHolding/13607077
Point of contact
Organisation name Individual name Electronic mail address Role

University of Bristol

Professor Michael Walter

not available

 		Point of contact

University College London

Professor John Brodholt

not available

 		Point of contact
Maintenance and update frequency
notApplicable

GEMET - INSPIRE themes, version 1.0

BGS Thesaurus of Geosciences

  • NGDC Deposited Data

  • Melting points

  • Nickel
dataCentre
Keywords

  • NERC_DDC
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no limitations
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The dataset is made freely available for access, e.g. via the Internet. Either no third party data / information is contained in the dataset or BGS has secured written permission from the owner(s) of any third party data / information contained in the dataset to make the dataset freely accessible.
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The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.
Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"
Language
English
Topic category
  • Geoscientific information
End date
2014-12 Before
Supplemental Information

NERC split award, lead grant NE/I010734/1, associated grant NE/I010947/1)

Reference System Information

No information provided.
Distribution format
Name Version
OnLine resource
Protocol Linkage Name
http://dx.doi.org/10.1016/j.epsl.2014.09.046
OnLine resource
Protocol Linkage Name
http://dx.doi.org/10.2138/am.2014.4735
OnLine resource
Protocol Linkage Name
https://dx.doi.org/10.1038%2Fsrep29830
OnLine resource
Protocol Linkage Name
http://www.bgs.ac.uk/services/ngdc/accessions/index.html#item72909
OnLine resource
Protocol Linkage Name
http://www.bgs.ac.uk/services/ngdc/accessions/index.html#item72029
Hierarchy level
Non geographic dataset
Other

non geographic dataset

Conformance result

Date (Publication)
2011
Explanation

See the referenced specification
Pass
No

Conformance result

Date (Publication)
2010-12-08
Explanation

See http://eur-lex.europa.eu/LexUriServ/LexUriServ.do?uri=OJ:L:2010:323:0011:0102:EN:PDF

Pass
No
Statement

Published papers may contain lineage information.

Metadata

File identifier
465c8ae2-aa70-015b-e054-002128a47908 XML
Metadata language
English
Hierarchy level
Non geographic dataset
Hierarchy level name

non geographic dataset
Date stamp
2024-09-09
Metadata standard name
UK GEMINI
Metadata standard version

2.3
Metadata author
Organisation name Individual name Electronic mail address Role

British Geological Survey

enquiries@bgs.ac.uk

Point of contact
Dataset URI

http://data.bgs.ac.uk/id/dataHolding/13607077

 
 

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