Results 61 to 70 of about 16,578 (144)

Platinum-group element and Au geochemistry of Late Archean to Proterozoic calc-alkaline and alkaline magmas in the Yilgarn Craton, Western Australia

, 2020
The Yilgarn Craton of Western Australia is one of the largest Archean cratons in the world and is well-known for its metal endowment. In order to provide new insights into its metallogenic fertility and the nature of the upper mantle that lies underneath
HSR Hughes (16313619), ML Fiorentini (12368269), E Choi (13698304), A Giuliani (7757102)   +3 more
core   +5 more sources

Petrologic relationship between lamprophyres, carbonatites, and heavy rare‐earth element enriched breccias at Hicks Dome

Terra Nova, Volume 36, Issue 4, Page 298-305, August 2024.
Abstract New petrological, geochemical, and P–T modelling results from igneous samples clarify how carbonatite‐lamprophyre magmatism, fluorite and rare earth element (REE) enrichment are petrogenetically related in southern Illinois. P–T modelling reveals that igneous rocks derive from a deep mantle carbonated source, that is consistent with trace ...
Jarek Trela, Jared T. Freiburg, Esteban Gazel, Laurence Nuelle, Anton H. Maria, David H. Malone, John M. Molinarolo   +6 more
wiley   +1 more source

西南日本の熱変成超苦鉄質岩体中のかんらん石と輝石の組成変化に関する覚書 [PDF]

, 2010
This short article presents some diagrams showing the compositional variations of primary and metamorphic olivine, orthopyroxene and clinopyroxene in peridotites and serpentinites from thermally metamorphosed ultramafic complexes in SW Japan. In contrast
Nozaka, Toshio
core   +1 more source

Origin and source regions of nodule-bearing kimberlites and ultramafic lamprophyres in southern Western Greenland

, 2012
High precision high resolution electron microprobe traverses of olivine grains in the Majuagaa kimberlite sensu stricto from southern West Greenland show that the olivine crystallisation is coupled to digestion of xenocrystic orthopyroxene into the melt.
Pilbeam, Llewellyn Howard
core   +1 more source

Nature and origin of ultramafic lamprophyres and carbonatites from the borders of the Labrador Sea

, 2005
Die Ränder des Labrador Meeres wurden während des späten Neoproterozoikums intensiv von karbonatreichen silikatischen Schmelzen durchsetzt. Diese Schmelzen bildeted sich bei Drucken zwischen ca. 4-6 GPa (ca. 120-180 km Tiefe) an der Basis der kontinentalen Mantel-Lithosphäre.
openaire   +3 more sources

Neoproterozoic ultramafic and mafic magmatism in the Eastern Cordillera of the central peruvian Andes: the Tapo Massif [PDF]

, 2010
A highly dismembered assemblage of ultramafic and mafic rocks is exposed in the Eastern Cordillera of the Central Peruvian Andes, extending along a discontinuous NW-SE belt over some 250 km between 12° and 9° S of latitude.
Acosta, Jorge, Castroviejo Bolibar, Ricardo, Acosta Ale, Jorge Gilberto, Tassinari, Colombo G., Pereira, Eurico, Tassinari, Colombo Celso Gaeta, Rodrigues, José Feliciano, Rodrigues, Jose F.   +7 more
core  

A link between the destruction of the mantle root beneath the North China Craton and the Cretaceous Greenhouse. [PDF]

Natl Sci Rev, 2022
Pearson DG.
europepmc   +1 more source

Linking deep CO₂ outgassing to cratonic destruction. [PDF]

Natl Sci Rev, 2022
Wang ZX, Liu SA, Li S, Liu D, Liu J.
europepmc   +1 more source

Remnants of early Earth differentiation in the deepest mantle-derived lavas. [PDF]

Proc Natl Acad Sci U S A, 2021
Giuliani A, Jackson MG, Fitzpayne A, Dalton H.   +3 more
europepmc   +1 more source

40Ar/39Ar dating of alkaline lamprophyres from the Polish Western Carpathians. [PDF]

, 2002
Amphiboles from two types of alkaline lamprophyres from the Silesian Nappe in the Polish Western Carpathians were dated by $^{40}Ar^{39}Ar$ stepwise heating technique.
Lucińska-Anczkiewicz, Anna, Slaczka, A., Lucinska-Anczkiewicz, A., Villa, Igor M., Ślączka, Andrzej, Anczkiewicz, R., Anczkiewicz, Robert, Villa, I.M.   +7 more
core   +1 more source