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The carbonatite-marble dykes of Abyan Province, Yemen Republic: the mixing of mantle and crustal carbonate materials revealed by isotope and trace element analysis

Record type: Article

Dykes of carbonate rocks, that cut gneisses in the Lowder-Mudiah area of southern Yemen, consist of dolomite and=or calcite with or without apatite, barite and monazite. Petrographic observations, mineralogical, XRF and ICP-MS analyses reveal that some of the carbonate rocks are derived from sedimentary protoliths, whereas others are magmatic calcio- and magnesio-carbonatites some of which are mineralized with barite-monazite. The interbanded occurrence and apparent contemporary emplacement of these different rock types within individual dykes, backed by Sr–Nd isotope evidence, are interpreted to show that intrusion of mantle-derived carbonatite magma was accompanied by mobilization of crustal marbles. That took place some 840 Ma ago but the REE-mineralization is dated at ca. 400 Ma.

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Citation

Le Bas, M.J., Ba-bttat, M.A.O., Taylor, R.N., Milton, J.A., Windley, B.F. and Evins, P.M. (2004) The carbonatite-marble dykes of Abyan Province, Yemen Republic: the mixing of mantle and crustal carbonate materials revealed by isotope and trace element analysis Mineralogy and Petrology, 82, (1-2), pp. 105-135. (doi:10.1007/s00710-004-0056-2).

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Published date: 2004

Identifiers

Local EPrints ID: 15790
URI: http://eprints.soton.ac.uk/id/eprint/15790
ISSN: 0930-0708
PURE UUID: 40d4f58f-b5d0-473f-857b-d7dafd76d806

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Date deposited: 31 May 2005
Last modified: 17 Jul 2017 16:46

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Contributors

Author: M.J. Le Bas
Author: M.A.O. Ba-bttat
Author: R.N. Taylor
Author: J.A. Milton
Author: B.F. Windley
Author: P.M. Evins

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