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Nature of the Mantle Beneath the Argyle AK1Lamproite Pipe: Constraints from Mantle Xenoliths,Diamonds, and Lamproite Geochemistry

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dc.contributor.authorJaques, Alan
dc.contributor.authorLuguet, A.
dc.contributor.authorSmith, C. B.
dc.contributor.authorPearson, D. Graham
dc.contributor.authorYaxley, Gregory
dc.contributor.authorKobussen, A. F.
dc.contributor.editorDavy, A. T.
dc.contributor.editorSmith, C. B.
dc.contributor.editorHelmstaedt, H.
dc.contributor.editorJaques, A. L.
dc.contributor.editorGurney, J. J.
dc.date.accessioned2019-12-04T01:56:55Z
dc.date.issued2018
dc.date.updated2019-11-25T08:01:47Z
dc.description.abstractThe richly diamondiferous ~1180 Ma Argyle AK1 lamproite pipe at the margin of the Kimberley craton of Western Australia is underlain by a depleted Archean lithospheric root composed mostly of garnet-poor lherzolite. Peridotite xenoliths (some diamondiferous) define a cratonic paleogeotherm with a ~200-km-thick lithosphere, comparable with estimates from present-day seismic S-wave tomography. The Argyle lamproite is highly enriched in incompatible elements and formed by very small degrees of partial melting under reduced H2O- and HF-rich conditions of depleted lithospheric mantle that had undergone long-term (>2 Ga) geochemical enrichment. Multiple metasomatic and thermal events including episodic formation of diamond have impacted on the lithosphere of the Kimberley craton, both predating and postdating Paleoproterozoic reworking of its margins and amalgamation within the larger North Australian craton. At Argyle, the inventory of older (Archean?) peridotitic diamonds in the craton root was augmented by Proterozoic (1.58 Ga) eclogitic diamonds with distinctive light carbon isotope compositions to generate Argyle’s rich diamond grades. The Argyle lamproite and other brief episodes of kimberlite, lamprophyre, and lamproite magmatism (some diamondiferous) on the Kimberley craton all bear their own geochemical and isotopic signature, reflecting variable relative contributions from asthenospheric and enriched lithospheric mantle sources. Mantle melting and eruption of small volumes of these diverse magmas may have been triggered by small short-lived thermal perturbations from the asthenosphere and/or tectonic events elsewhere on the Australian continent, triggered by global plate reconfiguration.en_AU
dc.format.mimetypeapplication/pdfen_AU
dc.identifier.isbn978-1-629493-06-0en_AU
dc.identifier.issn1547-3112en_AU
dc.identifier.urihttp://hdl.handle.net/1885/187268
dc.language.isoen_AUen_AU
dc.publisherSociety of Economic Geologistsen_AU
dc.relation.ispartofGeoscience and Exploration of the Argyle, Bunder, Diavik, and Murowa Diamond Depositsen_AU
dc.relation.isversionof1st edition Edition
dc.rights© 2018 Society of Economic Geologists, Inc.en_AU
dc.sourceSpecial Publication Number 20en_AU
dc.titleNature of the Mantle Beneath the Argyle AK1Lamproite Pipe: Constraints from Mantle Xenoliths,Diamonds, and Lamproite Geochemistryen_AU
dc.typeBook chapteren_AU
local.bibliographicCitation.lastpage143en_AU
local.bibliographicCitation.placeofpublicationUSA
local.bibliographicCitation.startpage119en_AU
local.contributor.affiliationJaques, Alan, College of Science, ANUen_AU
local.contributor.affiliationLuguet, A., Steinmann Institute für Geologie, Mineralogie und Paläontologie, Universität Bonn, Germanyen_AU
local.contributor.affiliationSmith, C. B., School of Earth Sciences, University of Bristolen_AU
local.contributor.affiliationPearson, D., Graham, University of Albertaen_AU
local.contributor.affiliationYaxley, Gregory, College of Science, ANUen_AU
local.contributor.affiliationKobussen, A. F., 2E3, Canada 5 Rio Tinto Exploration,en_AU
local.contributor.authoremailu5005121@anu.edu.auen_AU
local.contributor.authoruidJaques, Alan, u5005121en_AU
local.contributor.authoruidYaxley, Gregory, u4039347en_AU
local.description.embargo2037-12-31
local.description.notesImported from ARIESen_AU
local.description.refereedYes
local.identifier.absfor040307 - Ore Deposit Petrologyen_AU
local.identifier.absfor040201 - Exploration Geochemistryen_AU
local.identifier.absseo840199 - Mineral Exploration not elsewhere classifieden_AU
local.identifier.ariespublicationu5786633xPUB468en_AU
local.identifier.doi10.5382/SP.20.05en_AU
local.identifier.uidSubmittedByu5786633en_AU
local.publisher.urlhttps://www.segweb.orgen_AU
local.type.statusPublished Versionen_AU

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