Boginfo

  
 
Museum Tusculanums Forlag bruger cookies for at huske dine indstillinger. Ved at bruge sitet accepterer du dette. Accepter cookies
 
Nyhedsbrev   Print siden   

Brooks, Charles Kent
Mineralogy of the Werner Bjerge alkaline complex, East Greenland

1982, 38 sider
Illustreret
19 x 26,5 cm
ISBN 978-87-635-1148-3
Serie: Monographs on Greenland | Meddelelser om Grønland, vol. 226
ISSN 0025-6676
Serie: Geoscience, vol. 7
ISSN 0106-1046



Vejl. pris55 DKK  8 $  7 €  7 £
Onlinepris44 DKK  7 $  6 €  5 £

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.


 Indholdsfortegnelse

▼ Din mening

The Tertiary Werner Bjerge conlplex is divided into a basic complex, a northern complex and a nepheline syenite complex. The basic complex consists of cumulate rocks (ranging from ultramafic to gabbros) containing plagioclase, clinopyroxene, olivine and titanomagnetite with intercumulus kaersutite or biotite and subsolidus amphiboles and sheet silicates. Similar cumulates but containing cumulus kaersutite occur as inclusions in dykes associated with the nearby Theresabjerg intrusion and have been included in the study. The northern complex includes a wide range of felsic rock types of which two granites have been examined. In the nepheline syenite complex the rock types investigated include foyaites, a tinguaite, and quartz-bearing pegmatite. The main minerals in these rocks are alkali feldspar, nepheline, sodalite, alkali pyroxene, alkali amphibole and biotite together with a wide range of minor and accessory phases.

Clinopyroxenes vary from diopsides and salites in the basic rocks to aegirine-augites and acmites in the more evolved types, which are unusually MnO-rich. Titan- aegirines occur in the pegmatite.

The amphibole in the basic rocks is kaersutite; in the granite it is manganoan richterite, and in the nepheline syenite complex the amphiboles vary from hastingsitic hornblende through katophorite to manganoan arfvedsonite. The pegmatite contains unique Li-arfvedsonites. Minor late-stage calcic amphiboles occur in the basic rocks.

Sheet silicates include micas and secondary mixed layer types, chlorite and talc. Primary nlicas of the basic complex are titaniferous biotites and in the nepheline syenites are Mn-rich biotites, while the pegmatite contains the rare Li-mica, taeniolite.

Feldspars range from bytownite in the basic rocks to mainly alkali feldspar in the nepheline syenites which is often optically homogeneous and strongly potassic. Analyses of feldspathoids and zeolites are also presented.

The oxides of the evolved rocks are also MnO-rich and pyrophanite has been encountered in both the granite and the nepheline syenites. Other Mn-rich phases are also present, such as Mn-pectolite and kupletskite (the Mn analogue of astrophyllite). Data have also been acquired for a wide range of accessory phases including (additionally) sulphides (pyrrhotite, pyrite and sphalerite), apatite, sphene, titanian garnets, narsarsukite, pyrochlore, calcite, chevkinite and several unidentified zirconosilicates from the nepheline syenites.

It is concluded that the geochemical coherence between the various rock units of the intrusion suggests a comagmatic origin for these, while the close similarities between the mineralogies of the Kangerdlugssuaq and Werner Bjerge alkaline complexes suggest a similar origin.

 
Emneområde | Arktiske studier |
Emneord | Geologi |
Specifikt emneord | Mineralogi |
Verdensdel m.v. | Grønland |
Sprog | Engelsk |

Indhold

Pressen skrev


Alle udgivelser af

Charles Kent Brooks som forfatter

The Phanerozoic development of the Kangerdlugssuaq area, East Greenland
1982, ISBN 978-87-635-1152-0, hft
The Phanerozoic development of the Kangerdlugssuaq area, East Greenland
1982, ISBN 978-87-635-1152-0, hft
Petrology of the coastal dykes at Tugtilik, southern East Greenland
1980, ISBN 978-87-635-1134-6, hft
Petrology of the coastal dykes at Tugtilik, southern East Greenland
1980, ISBN 978-87-635-1134-6, hft
Geomorphological observations at Kangerdlugssuaq, East Greenland
1979, ISBN 978-87-635-1129-2, hft
Geomorphological observations at Kangerdlugssuaq, East Greenland
1979, ISBN 978-87-635-1129-2, hft
 


Indlæg offentliggøres med navn og e-mail. Forlaget forbeholder sig ret til at redigere og udelade indlæg.




Museum Tusculanums ForlagRådhusvej 192920 Charlottenlund
Tlf. 3234 1414info@mtp.dk
CVR: 8876 8418

Bank: Danske Bank, 1092 København KBIC: DABADKKK
Reg.nr.: 1551Kontonr.: 000 5252 520IBAN: DK98 3000 000 5252520

www.mtp.dk er en e-mærket netbutik, og derfor har du altid adgang til e-mærkets gratis Forbrugerhotline, når du handler hos os.

©2004–2020 Museum Tusculanums Forlag. Alle rettigheder forbeholdes. Ved brug af dette site anerkender og accepterer du, at indholdet på dette site tilhører MTF eller tredjemand fra hvem MTF afleder sine rettigheder, samt at indholdet er ophavsretligt beskyttet og ikke må anvendes uden forudgående skriftlig samtykke fra MTF. Du anerkender og accepterer yderligere, at varemærker, kendetegn, varenavne, logoer og produkter vist på dette site, er beskyttet og ikke må anvendes uden forudgående skriftligt samtykke fra MTF.


Handelsbetingelser Juridiske betingelser Behandling af personlige oplysninger