|
|
|
Boginfo |
|
|
|
|
|
|
Museum Tusculanums Forlag bruger cookies for at huske dine indstillinger. Ved at bruge sitet accepterer du dette. Accepter cookies
|
|
Sørensen, Henning
The Ilímaussaq alkaline complex, South Greenland
- an Overview of 200 years of Research and an Outlook
2006, 70 sider Illustreret 21 x 28 cm
ISBN 978-87-635-1271-8
Serie:
Monographs on Greenland | Meddelelser om Grønland, vol. 342
ISSN 0025-6676
Serie:
Geoscience, vol. 45
ISSN 0106-1046
|
|
Vejl. pris195 DKK 30 $ 26 € 23 £
|
Onlinepris156 DKK 24 $ 21 € 19 £
|
|
|
Black December-pris97 DKK 15 $ 13 € 12 £
|
Må du bare eje denne bog?
Man kan desværre ikke købe direkte i vores webshop lige nu da den betalingsløsning vi tidligere har anvendt, er lukket.
En ny – og bedre – hjemmeside er på vej, men den er ikke helt klar endnu.
Indtil den lanceres, kan du bestille bøger på den gammeldags maner, ved at skrive til order@mtp.dk. Så sender vi dig bøgerne med en faktura.
Husk at angive navn og adresse til forsendelsen i din mail.
Bestillinger sendes som udgangspunkt som pakker til afhentning; læs mere her. Hvis du behøver levering til døren, så angiv også det i din bestilling.
|
Fås også som e-publikation
Fås også som trykt bog
The Ilímaussaq alkaline complex, South Greenland, the type locality of agpaitic nepheline syenites
and of thirty minerals, among which arfvedsonite, eudialyte and sodalite, has been studied since
1806. The paper reviews the outcome of 200 years of geological investigations and presents an
overview and a synthesis of the petrology of the complex.
The site of the complex was invaded
successively by augite syenitic, alkali granitic and nepheline syenitic melts. Remnants of the augite
syenite and granite intrusions are found along the contacts of the nepheline syenites and as xenoliths
in these. The nepheline syenites, which occupy the major part of the complex, are divided into a
roof series, an intermediate series and a floor series. The roof series crystallized from the roof
downward in the order pulaskite, foyaite, and the agpaitic rocks sodalite foyaite and naujaite. The
floor series consists of cumulates: an inferred hidden part formed simultaneously with the roof
series and an exposed part of layered agpaitic nepheline syenites (kakortokites) which were formed
at least partly later than the roof series. The floor series passes gradually into the overlying
intermediate series consisting of the agpaitic rock type called lujavrites. The lujavrites enclose rafts
of naujaite and appear to have been emplaced by piecemeal stoping. The larger lujavrite masses are
floor cumulates, but lujavrite dykes and sheets occupy fractures in the roof series rocks.
According to one model for the evolution of the complex, the nepheline syenites formed by
consolidation of one magma batch in a closed system. The lujavrites were formed from the residual
melts left after the formation of the roof series and the floor series and were sandwiched between
these. A second model implies that the kakortokites and lujavrites formed from one or more
separate magma pulses which intruded the already consolidated roof series rocks. This model is
supported by new information on contact relations and especially on the petrology and
geochemistry of a marginal pegmatitic facies that forms a rim around the kakortokite-lower aegirine
lujavrite part of the complex. It consists of a massive-textured matrix intersected by pegmatites. The
matrix was the first rock to form in the lowermost exposed part of the complex and gives
information about the composition of the initial magma of the kakortokite-lujavrite sequence.
It is concluded that the agpaitic rocks of the complex were formed from at least two successive
magma injections, which formed respectively the roof series and the kakortokite-lujavrite sequence.
Alle udgivelser af
Henning Sørensen som forfatter
Geology of the Lujavrites from the Ilímaussaq alkaline complex, South Greenland, with information from seven bore holes 2002, ISBN 978-87-635-1258-9, hft
Geology of the Lujavrites from the Ilímaussaq alkaline complex, South Greenland, with information from seven bore holes 2002, ISBN 978-87-635-1258-9, hft
Geology of the Lujavrites from the Ilímaussaq alkaline complex, South Greenland, with information from seven bore holes 2002, ISBN 978-87-635-3059-0, e-publikation
Geology of the Lujavrites from the Ilímaussaq alkaline complex, South Greenland, with information from seven bore holes 2002, ISBN 978-87-635-3059-0, e-publikation
The Ilímaussaq alkaline complex, South Greenland 2006, ISBN 978-87-635-3064-4, e-publikation
The Ilímaussaq alkaline complex, South Greenland 2006, ISBN 978-87-635-3064-4, e-publikation
| |
|
|
|
|
|
|
|
|
|
|