Lovdarite from the Ilimaussaq alkaline complex, South Greenland

Petersen, Ole V.; Niedermayr, G.; Johnsen, Ole; Gault, Robert A.; tter, F. Brandstä

doi:10.1127/0028-3649/2002/2002-0023

Cited by 40 publications

(21 citation statements)

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“…However, comparison between coefficients determined from experiments conducted at b 0.1 GPa (Veksler et al, 1998(Veksler et al, , 2012) and 1-3 GPa (Martin et al, 2013) suggest that pressure has little effect on trace element partitioning. Bulakh et al (1998), Mitchell (1999, 2002), Larsen and Gault (2002), Moore et al (2015), Orlandi et al (1990), Pekov et al (1997, Petersen et al (2001), Wall and Zaitsev (2004), Zaitsev and Chakhmouradian (2002), Zaitsev et al (1998Zaitsev et al ( , 2004 in immiscibility, the two liquids coexisted with a low-density vapour, a product also noted in many of Martin et al's (2013) run products. In natural occurrences such a mobile vapour phase, capable of dissolving substantial alkalis and REE (Wendlandt and Harrison, 1979) would be a very efficient fenitization agent.…”

Section: Major and Trace Elementsmentioning

confidence: 78%

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Mineralogical evolution and REE mobility during crystallisation of ancylite-bearing ferrocarbonatite, Haast River, New Zealand

Cooper

Collins

Palin

et al. 2015

Lithos

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Section: Major and Trace Elementsmentioning

confidence: 78%

“…In terms of mineralogical classification, these compositions would be ancylite-(Nd), and similar Nd-rich compositions have been recorded from carbonatite at Rocky Boy, Montana (Reguir and Mitchell, 2000), from ancylite-(La) in albitite at Ilimaussaq (Petersen et al, 2001), and from BearPaw Mountains (Chakhmouradian pers. comm.…”

Section: Ancylitementioning

confidence: 92%

Mineralogical evolution and REE mobility during crystallisation of ancylite-bearing ferrocarbonatite, Haast River, New Zealand

Cooper

Collins

Palin

et al. 2015

Lithos

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“…14.8d), (ii) albite-analcime-and natrolite-dominated veins, in cases with galena, sphalerite and various Be-and Nb-minerals (e.g., tugtupite, chkalovite, pyrochlore; Fig. 14.8e) and various silico-phosphate and phosphate minerals (e.g., steenstrupine, natrophosphate; Petersen et al 2001) and (iii) zoned veins with aegirine-rich rims and arfvedsonite-rich cores with or without sodalite, nepheline, albite and analcime (Fig. 14.8f).…”

Section: Field Relations Among Major Rock Types and General Structurementioning

confidence: 97%

“…Minerals for which the Ilímaussaq complex is the type locality are marked in italic, asterisks mark minerals, which have not been described from other localities. For a full list of minerals indentified in the Ilímaussaq alkaline complex, the reader is referred to Petersen (2001 Here we present an overview of the present understanding on the origin and evolution of the Ilímaussaq magmatic system. Furthermore, based on detailed mineral chemical investigations and structural data, we provide a new hypothesis on the origin of the kakortokite-lujavrite sequence of the complex.…”

Section: Introductionmentioning

confidence: 99%

The Ilímaussaq Alkaline Complex, South Greenland

Marks

Markl

2015

Springer Geology

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The Ilímaussaq complex in South Greenland is a well-studied multiphase alkaline to peralkaline intrusion of Mesoproterozoic age. Most of the Ilímaussaq rocks are extremely enriched in alkalis, iron, halogens, high-field-strength elements (HFSE) and other rare elements, forming one of the most differentiated peralkaline rock suites known.The major factors causing the extreme differentiation trends are low oxygen fugacity and silica activity as well as very low water activity in the melts. These inhibit the early exsolution of aqueous NaCl-bearing fluids and facilitate the enrichment of alkalis and halogens in the melts, thereby increasing the solubility of HFSE. The unusually long crystallization interval of these rocks and the suspected continuous transition from melt to fluid results in extensive (auto)metasomatism and hydrothermal overprint. Primary mineral assemblages are therefore partially resorbed in most rock units and replaced by secondary minerals to various extents.The Ilímaussaq complex is a well-known example of magmatic layering in peralkaline plutonic rocks. Recent investigations of mineral chemical trends in the layered rocks permit better understanding of their formation. The mechanism of crystal mats formation in the cooling magma causing crowding effects during settling of the layering-forming minerals is believed to govern the formation of the Ilímaussaq layered sequence.Despite more than 100 years of research and hundreds of publications on Ilí-maussaq, important aspects on the origin of some Ilímaussaq rocks, the architecture and deep structure of the complex and the significance of hydrocarbons and bitumens present in the peralkaline rocks remain unclear. Thus, plenty of room for further studies on these unusual rocks exists and interdisciplinary research is needed to better understand the genesis of this unique magmatic complex.

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“…In other alkaline massifs, minerals of cesium sensu stricto were unknown until now, but several Cs-bearing minerals were reported. The highest cesium content in oxygen-bearing minerals of alkaline complexes (other than Darai-Pioz) was reported in the zeolite-like beryllosilicate leifite, (Na,K,Cs,Rb)Na 6 [Be 2 Al 3 Si 15 O 39 F 2 ]: 1.4 wt.% Cs 2 O in a sample from the Ilímaussaq complex, South Greenland (Petersen et al 1994), and 0.9 wt. % Cs 2 O in a sample from the Khibiny complex, Kola Peninsula (Menshikov et al 1999).…”

Section: Introductionmentioning

confidence: 99%

PAUTOVITE, CsFe2S3, A NEW MINERAL SPECIES FROM THE LOVOZERO ALKALINE COMPLEX, KOLA PENINSULA, RUSSIA

Pekov¹,

Agakhanov²,

Boldyreva³

et al. 2005

The Canadian Mineralogist

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Pautovite, the cesium-dominant analogue of rasvumite and picotpaulite, is a new mineral species found in the Palitra peralkaline pegmatite, Kedykverpakhk Mountain, Lovozero alkaline complex, Kola Peninsula, Russia. It is associated with belovite-(Ce), villiaumite, aegirine, ussingite, natrosilite, microcline, sodalite, potassicarfvedsonite, sérandite, nordite-(Ce), ferronordite-(Ce), bornemanite, vuonnemite, lomonosovite, vitusite-(Ce), phosinaite-(Ce), barytolamprophyllite, mangan-neptunite, manaksite, chkalovite, kapustinite, kazakovite, steenstrupine-(Ce), thorosteenstrupine, bario-olgite, nalipoite, sphalerite, löllingite, wurtzite, bartonite, chlorbartonite, and zakharovite, among others. Pautovite occurs in a hydrothermal assemblage as crudely prismatic to acicular crystals up to 120 m long and up to 15 m thick, typically forming subparallel overgrowths on belovite-(Ce). Twinning was not observed. Pautovite is opaque, dark steel-grey with a strong metallic luster, becoming dull black on exposure to moist air. It is fl exible. Cleavage is perfect on {110}, and the fracture is splintery. D(calc.) equals 3.85(1) g/cm 3 . The density and hardness could not be measured, and the streak could not be observed because of the minute size of the crystals. In refl ected light, pautovite is strongly birefl ectant, with distinct pleochroism from greyish white to grey with a slight pinkish tint. The anisotropy is strong in pale brownish tints. No internal refl ections were observed. Refl ectance values ( in nm: R 1 , R 2 , in %); measured in air (SiC standard) are: 470: 14.0, 24.6; 546: 14.7, 23.5; 589: 15.2, 24.6; 650: 16.0, 27.1; values Keywords: pautovite, new mineral species, rasvumite, picotpaulite, cesium, rubidium, thallium, alkali sulfi de, peralkaline pegmatite, Lovozero complex, Kola Peninsula, Russia. SOMMAIRENous décrivons ici la pautovite, lʼanalogue à dominance de césium de la rasvumite et la picotpaulite, nouvelle espèce minérale découverte dans la pegmatite hyperalcaline de Palitra, mont Kedykverpakhk, complexe alcalin de Lovozero, péninsule de Kola, en Russie. Elle est associée à bélovite-(Ce), villiaumite, aegyrine, ussingite, natrosilite, microcline, sodalite, potassicarfvedsonite, sérandite, nordite-(Ce), ferronordite-(Ce), bornemanite, vuonnemite, lomonosovite, vitusite-(Ce), phosinaïte-(Ce), barytolamprophyllite, mangan-neptunite, manaksite, chkalovite, kapustinite, kazakovite, steenstrupine-(Ce), thorosteenstrupine, bario-olgite, § E-mail address: igorpekov@mtu-net.ru 966 THE CANADIAN MINERALOGIST Mont Saint-Hilaire, Quebec, Canada (Chakhmouradian et al. 2001). In this paper, we describe a new mineral species with the ideal composition, CsFe 2 S 3 , the cesiumdominant analogue of rasvumite and picotpaulite, TlFe 2 S 3 . The new species was discovered in a hyperagpaitic pegmatite at the well-known Lovozero alkaline complex, Kola Peninsula, Russia. We have named it pautovite (in Cyrillic: u ) in honor of Leonid Anatolʼevich Pautov (b. 1958) (in Cyrillic: u ), an outstanding Russian mineral...

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Lovdarite from the Ilimaussaq alkaline complex, South Greenland

Cited by 40 publications

References 0 publications

Mineralogical evolution and REE mobility during crystallisation of ancylite-bearing ferrocarbonatite, Haast River, New Zealand

Mineralogical evolution and REE mobility during crystallisation of ancylite-bearing ferrocarbonatite, Haast River, New Zealand

The Ilímaussaq Alkaline Complex, South Greenland

PAUTOVITE, CsFe2S3, A NEW MINERAL SPECIES FROM THE LOVOZERO ALKALINE COMPLEX, KOLA PENINSULA, RUSSIA

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