Lamprophyric dykes in Revdal, Scoresby Land, East Greenland: conflicting field observations and K-Ar age determinations

Poul-Henrik Larsen; Lars Stemmerik; Troels F.D. Nielsen; David C. Rex

doi:10.37570/bgsd-1990-38-01

Lamprophyric dykes in Revdal, Scoresby Land, East Greenland: conflicting field observations and K-Ar age determinations

Poul-Henrik Larsen
, Lars Stemmerik
, Troels F.D. Nielsen
, David C. Rex

Research output: Contribution to journal › Article › Research › peer-review

2 Citations (Scopus)

Abstract

Field observations on lamprophyric dykes in Revdal, Scoresby Land, suggest a Late Permian age and the dykes would thus represent magmatism related to Permian rifting and basin formation, whereas K-Ar age determinations and chemistry suggest a Tertiary age. It is concluded that the dykes probably are Tertiary and never penetrated Upper Permian sediments due to chilling and fracturing at the base of Upper Permian water rich sediments. The dykes most likely belong to a period of alkaline magmatism that followed the onset of sea floor spreading in this part of the North Atlantic around 55 Ma ago. -Authors

Original language	English
Pages (from-to)	1-9
Number of pages	9
Journal	Bulletin of the Geological Society of Denmark
Volume	38
DOIs	https://doi.org/10.37570/bgsd-1990-38-01
Publication status	Published - 1990

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Programme Area 3: Energy Resources

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title = "Lamprophyric dykes in Revdal, Scoresby Land, East Greenland: conflicting field observations and K-Ar age determinations",

abstract = "Field observations on lamprophyric dykes in Revdal, Scoresby Land, suggest a Late Permian age and the dykes would thus represent magmatism related to Permian rifting and basin formation, whereas K-Ar age determinations and chemistry suggest a Tertiary age. It is concluded that the dykes probably are Tertiary and never penetrated Upper Permian sediments due to chilling and fracturing at the base of Upper Permian water rich sediments. The dykes most likely belong to a period of alkaline magmatism that followed the onset of sea floor spreading in this part of the North Atlantic around 55 Ma ago. -Authors",

author = "Poul-Henrik Larsen and Lars Stemmerik and Nielsen, \{Troels F.D.\} and Rex, \{David C.\}",

year = "1990",

doi = "10.37570/bgsd-1990-38-01",

language = "English",

volume = "38",

pages = "1--9",

journal = "Bulletin of the Geological Society of Denmark",

issn = "0011-6297",

publisher = "Dansk Geologisk Forening",

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TY - JOUR

T1 - Lamprophyric dykes in Revdal, Scoresby Land, East Greenland

T2 - conflicting field observations and K-Ar age determinations

AU - Larsen, Poul-Henrik

AU - Stemmerik, Lars

AU - Nielsen, Troels F.D.

AU - Rex, David C.

PY - 1990

Y1 - 1990

N2 - Field observations on lamprophyric dykes in Revdal, Scoresby Land, suggest a Late Permian age and the dykes would thus represent magmatism related to Permian rifting and basin formation, whereas K-Ar age determinations and chemistry suggest a Tertiary age. It is concluded that the dykes probably are Tertiary and never penetrated Upper Permian sediments due to chilling and fracturing at the base of Upper Permian water rich sediments. The dykes most likely belong to a period of alkaline magmatism that followed the onset of sea floor spreading in this part of the North Atlantic around 55 Ma ago. -Authors

AB - Field observations on lamprophyric dykes in Revdal, Scoresby Land, suggest a Late Permian age and the dykes would thus represent magmatism related to Permian rifting and basin formation, whereas K-Ar age determinations and chemistry suggest a Tertiary age. It is concluded that the dykes probably are Tertiary and never penetrated Upper Permian sediments due to chilling and fracturing at the base of Upper Permian water rich sediments. The dykes most likely belong to a period of alkaline magmatism that followed the onset of sea floor spreading in this part of the North Atlantic around 55 Ma ago. -Authors

UR - https://www.scopus.com/pages/publications/0025631109

U2 - 10.37570/bgsd-1990-38-01

DO - 10.37570/bgsd-1990-38-01

M3 - Article

AN - SCOPUS:0025631109

SN - 0011-6297

VL - 38

SP - 1

EP - 9

JO - Bulletin of the Geological Society of Denmark

JF - Bulletin of the Geological Society of Denmark

ER -

Lamprophyric dykes in Revdal, Scoresby Land, East Greenland: conflicting field observations and K-Ar age determinations

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