Mathiasite-loveringite and priderite in mantle xenoliths from the Alto Paranaíba Igneous Province, Brazil: genesis and constraints on mantle metasomatism

to related objects

Abstract: Alkali-bearing Ti oxides were identified in mantle xenoliths enclosed in kimberlite-like rocks from Limeira 1 alkaline intrusion from the Alto Paranaíba Igneous Province, southeastern Brazil. The metasomatic mineral assemblages include mathiasite-loveringite and priderite associated with clinopyroxene, phlogopite, ilmenite and rutile. Mathiasite-loveringite (55–60 wt.% TiO2; 5.2–6.7 wt.% ZrO2) occurs in peridotite xenoliths rimming chromite (∼50 wt.% Cr2O3) and subordinate ilmenite (12–13.4 wt.% MgO) in double reaction rim coronas. Priderite (Ba/(K+Ba)< 0.05) occurs in phlogopite-rich xenoliths as lamellae within Mg-ilmenite (8.4–9.8 wt.% MgO) or as intergrowths in rutile crystals that may be included in sagenitic phlogopite. Mathiasite-loveringite was formed by reaction of peridotite primary minerals with alkaline melts. The priderite was formed by reaction of peridotite minerals with ultrapotassic melts. Disequilibrium textures and chemical zoning of associated minerals suggest that the metasomatic reactions responsible for the formation of the alkali-bearing Ti oxides took place shortly prior the entrainment of the xenoliths in the host magma, and is not connected to old (Proterozoic) mantle enrichment events.

Location
Deutsche Nationalbibliothek Frankfurt am Main
Extent
Online-Ressource
Language
Englisch

Bibliographic citation
Mathiasite-loveringite and priderite in mantle xenoliths from the Alto Paranaíba Igneous Province, Brazil: genesis and constraints on mantle metasomatism ; volume:6 ; number:4 ; year:2014 ; pages:614-632 ; extent:19
Open Geosciences ; 6, Heft 4 (2014), 614-632 (gesamt 19)

Creator
Almeida, Vidyã
Janasi, Valdecir
Svisero, Darcy
Nannini, Felix

DOI
10.2478/s13533-012-0197-5
URN
urn:nbn:de:101:1-2501051742003.592512897257
Rights
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Last update
15.08.2025, 7:30 AM CEST

Data provider

This object is provided by:
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Show original at data provider

Associated

  • Almeida, Vidyã
  • Janasi, Valdecir
  • Svisero, Darcy
  • Nannini, Felix

Other Objects (12)

Hydrous mantle plume promoted the generation of continental flood basalts in the Tarim large igneous province

Hydrous mantle plume promoted the generation of continental flood basalts in the Tarim large igneous province

Mantle

Archivale

Mantle

Transient mantle cooling linked to regional volcanic shut-down and early rifting in the North Atlantic Igneous Province

Transient mantle cooling linked to regional volcanic shut-down and early rifting in the North Atlantic Igneous Province

Transfer of mantle fluids to the lower continental crust : : constraints from mantle mineralogy and Moho temperature

Transfer of mantle fluids to the lower continental crust : : constraints from mantle mineralogy and Moho temperature

Buoyant hydrous mantle plume from the mantle transition zone

Buoyant hydrous mantle plume from the mantle transition zone

Taking on the Mantle

Artikel

Taking on the Mantle

Taking on the mantle

Artikel

Taking on the mantle

My father's mantle - BBC

Archivale

My father's mantle - BBC

Taking on the Mantle

Artikel

Taking on the Mantle

Smoldering mantle cell lymphoma

Smoldering mantle cell lymphoma

Early Earth mantle heterogeneities

Early Earth mantle heterogeneities

Constraints on mantle processes and late accretion from chalcogen and highly siderophile element abundances in rocks from the Earth's mantle

Hochschulschrift

Constraints on mantle processes and late accretion from chalcogen and highly siderophile element abundances in rocks from the Earth's mantle

Related objects