...A. A. Finch; K. M. Goodenough; H. M. Salmon; T. Andersen Abstract North Motzfeldt is an intrusive igneous centre within the Igaliku (formerly spelt Igaliko) complex, Gardar Province, South Greenland. A detailed field description of the centre is given, with preliminary geochemical and isotopic data...

...A. P. Jones; L. M. Larsen Abstract Whole-rock analyses including the REE are given for nineteen samples from four of the six overlapping nepheline syenite intrusions which constitute the Proterozoic (∼ 1310 ma) Motzfeldt Centre. Larvikite margins of one unit (SM5) are apparently related...

...Jamie A. Mccreath; Adrian A. Finch; Donald A. Herd; Ashlyn Armour-Brown Abstract Pyrochlore minerals are common accessory phases in the syenite and nepheline syenite rocks of the Motzfeldt alkaline center, Gardar Province, South Greenland, and are of important economic interest due...

... Center yields a U-Pb apatite age of 1.35 ± 0.01 Ga. An augite-syenite from the Ilímaussaq Complex yields a Sm-Nd pyroxene, alkali feldspar, magnetite age of 1.13 ± 0.05 Ga. On the basis of field relationships, the Eriksfjord Formation lavas have been interpreted as the oldest manifestation of Gardar...

... element) mapping of outcrops—applications for neodymium detection : Remote Sensing , v. 7 , p. 5160 – 5186 . Bradshaw C. , 1988 , A petrographic, structural and geochemical study of the alkaline igneous rocks of the Motzfeldt centre, south Greenland : Durham, UK , Durham University , 401...

...F ig . 7. ( a , b ) Comparison of zirconium enrichment in pyroxene in syenite unit SM5 from the neighbouring Motzfeldt centre ( Jones and Peckett, 1980 ) with the trends observed for the unit SN1A syenites from North Qôroq. Zirconium end-member represented by NAZ. ( c ) Zirconium variation...

... agpaitic syenites ( Sørensen 1997 ). Largest outcrops of REE-enriched agpaites occur in the Ilímaussaq intrusion; minor occurrences of known REE-rich syenites are known from the Motzfeldt intrusive centre of the Igaliko complex. The Ilímaussaq intrusion ( Fig. 1b ) hosts two rock types that both...

... the nepheline syenites of the Motzfeldt centre, South Greenland : Mineralogical Magazine , v. 48 , p. 1 – 12 , doi: 10.1180/minmag.1984.048.346.01 . Jordens , A. , Cheng , Y.P. , and Waters , K.E. , 2013 , A review of the beneficiation of rare earth element bearing minerals : Minerals...

... of the Igaliko Complex in order of intru- sion: M Motzfeldt, NQ North Q6roq, SQ South Q6roq, I Igdlerfigssalik. Also shown is the outer boundary of unit SI 5 in the Igdlerfigssalik Centre which is used in the cal- flops of 7. After Emelens & Harry 197o and Emeleus & Stephensoa x97o. 31 ~ D. Stephenson intrusions...

... minerals from sediments and bedrock in mineral exploration . Geochemistry: Exploration, Environment, Analysis , 11 , 265 – 278 . McCreath J.A. Finch A.A. Herd D.A. Armour-Brown A.A. 2013 . Geochemistry of Pyrochlore Minerals from the Motzfeldt Center, South Greenland...

... Ingersoll pegmatite, Black Hills, South Dakota . Geochimica et Cosmochimica Acta , 53 , 429 – 441 . Jones A.P. ( 1980 ) The petrology and structure of the Motzfeld centre, Igaliko, South Greenland . Ph.D. thesis , University of Durham , U.K . Jones A.P. Larsen L.M. ( 1985...

..., Germany (Schäfer and Schäfer, 2018 ); and the Motzfeldt center, Igaliku complex, Kujalleq, Greenland (Schönenberger and Markl, 2008 ). The Mindat database ( www.mindat.org , accessed December 29 th 2022) lists two other occurrences of ferro-ferri-katophorite, based on personal communications...

.... and Markl , G. ( 2005 ) The Gronnedal-Ika carbonatite-syenite complex, South Greenland: carbonatite formation by liquid immiscibility . Journal of Petrology , 46 , 191 – 217 . Jones , A.P. ( 1984 ) Mafic silicates from the nepheline syenites of the Motzfeldt centre, South Greenland...