The Influence of Crystal and Melt Compositions On the Ree+y Partitioning Between Clinopyroxene and Basanitic/tephritic Melts of Cretaceous Alkaline Magmatism On the Southeastern Part of the South American Platform, Southeast Brazil

Ambrosio, Mariana Robertti; Azzone, Rogério Guitarrari

doi:10.3749/canmin.1700024

Cited by 8 publications

(4 citation statements)

References 95 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…,Arzamastsev et al (2009),Ambrosio and Azzone (2018),Beard et al (2019),Minissale et al (2019), andBaudouin et al (2020), among which the data ofAmbrosio and Azzone (2018) are in best agreement with our data (Fig.10). The samples ofBeard et al (2019) andBaudouin et al (2020) display unusually high degrees of REE incorporation into the M1-site, a feature attributed to a…”

supporting

confidence: 90%

Trace element partitioning in silica-undersaturated alkaline magmatic systems

Molendijk

Namur

Mason

et al. 2023

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

supporting

confidence: 90%

Trace element partitioning in silica-undersaturated alkaline magmatic systems

Molendijk

Namur

Mason

et al. 2023

Geochimica et Cosmochimica Acta

View full text Add to dashboard Cite

“…In the case of the Kautokeino rocks, the examined trioctahedral mica can mainly be classified as annite and siderophyllite [69][70][71] (Figure 3). These micas co-occur with fuchsite-forming overgrowths (Table A1).…”

Section: Sem-eds Analysesmentioning

confidence: 99%

The Optical and Spectroscopic Properties of Fuchsite, Spodumene, and Lepidolite from Northern Scandinavia (Kautokeino, Kaustinen, Kolmozero)

2023

View full text Add to dashboard Cite

Li-Ce-Ta (LCT) pegmatites containing lithium mineralization in the form of spodumene and lepidolite, as well as fuchsite, from the regions of northern Scandinavia (N Norway, N Finland, N Russia) were studied. Detailed analyses of the chemical compositions of these minerals were carried out, involving scanning electron microscopy (SEM) with energy-dispersive spectroscopy (EDS), Fourier transform infrared (FTIR) spectroscopy with attenuated total reflectance (ATR), and X-ray photoelectron spectroscopy (XPS) studies. Their crystal structures were confirmed with the X-ray diffraction technique. Studies involving microscopy were also carried out, indicating the optical features of these minerals. Based on the analyses carried out in the studied rocks, the characteristics of these minerals were determined, as well as the crystallization conditions. This research indicates that the N Scandinavian area is prospective and may lead to further discoveries of this type of pegmatite in the studied region.

show abstract

“…Material D). Additionally, the magmatic liquid in equilibrium with C-type phenocrysts was calculated from a partition coefficient previously established for the dikes of the region (Ambrosio and Azzone 2018).…”

Section: Mixing Of Alkaline Magmas and Antecryst Populationsmentioning

confidence: 99%

Mafic macrocrysts of ultrabasic alkaline dikes from the Mantiqueira Range, SE, Brazil: tracers of a complex plumbing system

et al. 2020

Self Cite

View full text Add to dashboard Cite

Macrocryst assemblages of porphyritic alkaline dikes in the Mantiqueira range (SE Brazil) are mainly composed of clinopyroxene and olivine with different origins. Based on petrographic features, mineral chemistry, and equilibrium relationships with the host liquid, those macrocrysts are classified as xenocrysts, antecrysts, and phenocrysts. Described xenocrysts are mantle olivine, Cr-diopside cores compatible with garnet-bearing mantle facies, green-core clinopyroxene cores compatible with lower crust, and enstatite cores mantled by clinopyroxene, all reported for the first time in this region. Two contrasting types of clinopyroxene antecrysts prevail among the macrocryst cores (both occurring in the same samples and presenting corrosion and sieve textures): primitive colorless diopside and more evolved green-core clinopyroxenes. In the studied rocks, green clinopyroxene zones mantling colorless diopside cores (and vice-versa) are also found. Diopside-and green-cores antecrysts have similar compositions to those from mafic and felsic alkaline melts, respectively. Phenocrysts are mainly related to Ti-augite overgrowths, mantling all other types. Mixing-model curves between mafic and felsic alkaline equilibrium liquids calculated from clinopyroxene antecrysts indicate a hybrid origin for the host matrix. The macrocryst populations of the studied dikes are indicative of a complex plumbing system, recording several processes of an open-system magmatic evolution.

show abstract

The Influence of Crystal and Melt Compositions On the Ree+y Partitioning Between Clinopyroxene and Basanitic/tephritic Melts of Cretaceous Alkaline Magmatism On the Southeastern Part of the South American Platform, Southeast Brazil

Cited by 8 publications

References 95 publications

Trace element partitioning in silica-undersaturated alkaline magmatic systems

Trace element partitioning in silica-undersaturated alkaline magmatic systems

The Optical and Spectroscopic Properties of Fuchsite, Spodumene, and Lepidolite from Northern Scandinavia (Kautokeino, Kaustinen, Kolmozero)

Mafic macrocrysts of ultrabasic alkaline dikes from the Mantiqueira Range, SE, Brazil: tracers of a complex plumbing system

Contact Info

Product

Resources

About