Trace Element and Sr-Pb-Nd-Hf Isotope Evidence for Ancient, Fluid-Dominated Enrichment of the Source of Aldan Shield Lamproites

G.R. Davies; A.J. Stolz; I.L. Mahotkin; G.M. Nowell; D.G. Pearson

doi:10.1093/petrology/egl005

Trace Element and Sr-Pb-Nd-Hf Isotope Evidence for Ancient, Fluid-Dominated Enrichment of the Source of Aldan Shield Lamproites

G.R. Davies, A.J. Stolz, I.L. Mahotkin, G.M. Nowell, D.G. Pearson

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Abstract

A phase of Mesozoic extension associated with the termination of continental collision at the southern margin of the Aldan Shield produced ultrabasic lamproites in a discontinuous belt 500 km long and ∼150 km wide. The lamproites, locally poorly diamondiferous, were emplaced as dykes, sills and pipes. All Aldan lamproites have primitive chemical characteristics (e.g. MgO up to 22·7 wt %) and are ultrapotassic (K

Original language	English
Pages (from-to)	1119-1146
Journal	Journal of Petrology
Volume	47
Issue number	6
DOIs	https://doi.org/10.1093/petrology/egl005
Publication status	Published - 2006

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abstract = "A phase of Mesozoic extension associated with the termination of continental collision at the southern margin of the Aldan Shield produced ultrabasic lamproites in a discontinuous belt 500 km long and ∼150 km wide. The lamproites, locally poorly diamondiferous, were emplaced as dykes, sills and pipes. All Aldan lamproites have primitive chemical characteristics (e.g. MgO up to 22·7 wt %) and are ultrapotassic (K",

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AU - Nowell, G.M.

AU - Pearson, D.G.

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Trace Element and Sr-Pb-Nd-Hf Isotope Evidence for Ancient, Fluid-Dominated Enrichment of the Source of Aldan Shield Lamproites

Abstract

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