Magmatic age of rare-earth element and zirconium mineralisation at the Norra Kärr alkaline complex, southern Sweden, determined by U–Pb and Lu–Hf isotope analyses of metasomatic zircon and eudialyte

Lithos ◽  
2017 ◽  
Vol 294-295 ◽  
pp. 73-86 ◽  
Author(s):  
Axel S.L. Sjöqvist ◽  
David H. Cornell ◽  
Tom Andersen ◽  
Ulf I. Christensson ◽  
Johan T. Berg
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Hf Isotope ◽  
Southern Sweden ◽  
Alkaline Complex ◽  
Isotope Analyses

scholarly journals Three Compositional Varieties of Rare-Earth Element Ore: Eudialyte-Group Minerals from the Norra Kärr Alkaline Complex, Southern Sweden

Minerals ◽  
2013 ◽  
Vol 3 (1) ◽  
pp. 94-120 ◽  
Author(s):  
Axel Sjöqvist ◽  
David Cornell ◽  
Tom Andersen ◽  
Muriel Erambert ◽  
Mattias Ek ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Southern Sweden ◽  
Alkaline Complex ◽  
Eudialyte Group

Biogeochemical expression of rare earth element and zirconium mineralization at Norra Kärr, Southern Sweden

2013 ◽  
Vol 133 ◽  
pp. 15-24 ◽  
Author(s):  
Britt Bluemel ◽  
Magnus Leijd ◽  
Colin Dunn ◽  
Craig J.R. Hart ◽  
Mark Saxon ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Southern Sweden

scholarly journals First occurrence of moskvinite-(Y) in the Ilímaussaq alkaline complex, South Greenland – implications for rare-earth element mobility

2016 ◽  
Vol 80 (1) ◽  
pp. 31-41 ◽  
Author(s):  
Henrik Friis
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Inductively Coupled Plasma ◽  
Large Scale ◽  
Earth Element ◽  
Theoretical Calculations ◽  
Alkaline Complex ◽  
Inductively Coupled ◽  
First Occurrence ◽  
Plasma Mass Spectrometry

AbstractMoskvinite-(Y), Na2K(Y,REE)Si6O15, is a rare mineral, which until now has only been described from its type locality Dara-i-Pioz, Tajikistan. At Ilímaussaq moskvinite-(Y) was discovered in a drill core from Kvanefjeld, where it occurs as a replacement mineral associated with a mineral belonging to the britholite group. The composition was determined by a combination of electron probe microanalysis and laser ablation inductively coupled plasma mass spectrometry analyses. The empirical formula based on 15 oxygens is Na1.94K0.99(Y0.94Yb0.03Er0.03Dy0.03Ho0.01Gd0.01)∑1.05Si5.98O15. The coexistence of an almost pure Y and a light rare-earth element (REE) mineral is interpreted as fractionation ofREEand Y during the replacement of an earlier formedREEmineral. Theoretical calculations of the observed replacement of feldspathoids by natrolite show that the generated fluid would have pH > 8, which inhibits large scale mobility ofREE. In addition, a K-Fe sulfide member of the chlorbartonite-bartonite group is for the first time observed in Ilímaussaq where it occurs where sodalite is replaced by natrolite and arfvedsonite by aegirine. The sulfide incorporates the S and some of the Cl generated by the alteration of sodalite, whereas the K and Fe originates from the replacement of arfvedsonite by aegirine.

Timing and source of rare earth element mineralisation in the Ditrău alkaline complex, Romania

2017 ◽  
Vol 126 (2) ◽  
pp. 93-93
Author(s):  
Richard Shaw ◽  
Kathryn Goodenough ◽  
Nick Roberts ◽  
Victoria Honour ◽  
Matt Horstwood ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Earth Element ◽  
Alkaline Complex

scholarly journals Magmatic origin and petrogenesis characterization of syenite rock from Pakkanadu alkaline complex, Southern Granulite Terrain, India: Implication on emplacement and petrogenetic history

2021 ◽  
Vol 13 (4) ◽  
pp. 1214-1224
Author(s):  
P. Gangatharan ◽  
K. Anbarasu ◽  
M. Satyanarayanan
Keyword(s):  
Rare Earth ◽  
Rare Earth Element ◽  
Tamil Nadu ◽  
Earth Element ◽  
Alkaline Complex ◽  
Carbonatite Complex ◽  
Study Region ◽  
Magmatic Origin ◽  
South Indian ◽  
Granulite Terrain

The present study mainly focused on understanding the magmatic origin and petrogenesis characterization based on the Petrography, major, trace and Rare Earth Element (REE) signatures in the alkaline syenite from Pakkanadu alkaline carbonatite complex. The alkaline plutons from South Indian granulite terrain are intruded along with Archaean epidote-hornblende gneisses. The study area was carbonatite complexes of Tamil Nadu and is characterized by a group of rock associations Carbonatite-Syenite-Pyroxenite - Dunite. From Harker various patterns Pakkanadu alkaline complex syenite showed increasing trends of SiO2, Al2O3, Na2O + K2O opposite to decreasing order of CaO, Fe2O3, MgO, TiO2, P2O5 and MnO trend, suggest fractionation of clinopyroxene, hornblende, sphene, apatite and oxide minerals and feldspar that ruled the fractionation. The concentration of trace elements enriched in Large Ion lithophile elements  (LILE) (Ba, Sr, and Rb) elements and High Field Strength Elements (HFSEs) indicated that the dyke intrusion by differentiation of magma from a mantle source. Rare earth element (REE) distribution of Light rare earth element (LREE) enriched and High rare earth element (HREE) depleted pattern show strongly fractionated pattern with moderate Eu anomalies. Plots of tectonic discrimination diagrams of Pakkanadu samples fall in the field of syn-COLG field to the VAG syn- COLG field.     For the first time, this type of study was carried out in the study region in a detailed manner. The present study significantly exposed the petrography, petrogenesis and magmatic origin process in the Pakkanadu alkaline carbonatite complex. 

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