Formation and transformation of mixed-layer minerals by Tertiary intrusives in Cretaceous mudstones, West Greenland

In the Nuussuaq Basin, West Greenland, a thick succession of Tertiary dolerites has penetrated Upper Cretaceous mudstone. The mixed-layer minerals of mudstone core samples have been analyzed by X-ray diffraction, solid-state 29Si and 27Al magic-angle spinning nuclear magnetic resonance, Mossbauer an...

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Bibliographic Details
Published in:Clays and clay minerals 2007-06, Vol.55 (3), p.260-283
Main Authors: Drits, Victor A, Lindgreen, Holger, Sakharov, Boris A, Jakobsen, Hans Jorgen, Fallick, Anthony E, Salyn, Alfred L, Dainyak, Lidia G, Zviagina, Bella B, Barfod, Dan N
Format: Article
Language:English
Subjects:
Arctic region
Burial Diagenesis
Cenozoic
clastic rocks
clay mineralogy
clay minerals
contact metamorphism
Cretaceous
diabase
Greenland
igneous rocks
illite
Illite-Smectite
intrusions
margarite
Mesozoic
metamorphism
mixed-layer minerals
mudstone
Nuussuaq Basin
Oil-Source Rocks
plutonic rocks
sed rocks, sediments
Sedimentary petrology
sedimentary rocks
sheet silicates
silicates
smectite
Tertiary
Tobelite
transformations
Upper Cretaceous
vermiculite
West Greenland
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Summary:In the Nuussuaq Basin, West Greenland, a thick succession of Tertiary dolerites has penetrated Upper Cretaceous mudstone. The mixed-layer minerals of mudstone core samples have been analyzed by X-ray diffraction, solid-state 29Si and 27Al magic-angle spinning nuclear magnetic resonance, Mossbauer and infrared spectroscopies, thermal analysis, chemical analysis, stable isotopes (18O/16O), and K/Ar dating. The mixed-layer minerals include for each sample two mixed-layer phases consisting of pyrophyllite, margarite, paragonite, tobelite, illite, smectite and vermiculite layers. The main, 80 m thick intrusion resulted in the formation of pyrophyllite, margarite, paragonite and tobelite layers. However, the tobelite layers are absent in samples
ISSN:0009-8604
1552-8367
DOI:10.1346/CCMN.2007.0550304