Geophysical constraints on the thickness of the Holyrood Pluton, Avalon Peninsula, Newfoundland

Authors

  • H. G. Miller Earth Sciences Department Memorial University of Newfoundland, St. John's, Newfoundland
  • D. A. Pittman Petro Canada, P.O. Box 2844, Calgary, Alberta

DOI:

https://doi.org/10.4138/1390

Abstract

The vertical extent of the Holyrood Pluton and the surrounding Harbpur Main Group of the northeastern Avalon Peninsula of Newfoundland is estimated using two-dimensional gravity and magnetic models. The models are interpreted to indicate that the maximum thickness of the Holyrood Pluton is 1.8 km and that mafic Harbour Main volcanics must exist beneath the pluton and be confined to the uppnr 2.0 km of the crust west of the Conception/Cabot Group boundary on the eastern portion of the survey area. RÉSUMÉ En utilisant des modèles à deux dimensions de gravite et de magnétisme, on a estime l’étendue verticale du pluton Holyrood et du groupe circonvoisin de Harbour Main dans l'est de la peninsule Avalon, Terre-Neuve. L'interprètation des modèles indique que lépaisseur maximale du pluton Holyrood atteint 1.8 km et que des roches volcaniques mafiques du groupe Harbour Main doivent se trouver sous le pluton et restreintes aux 2.0 km supérieurs de l'écorce se trouvant à l'ouest de la limite des groupes de Conception et de Cabot, dans la partie orientale de la région étudiée. [Traduit par le journal]

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Published

1982-05-05

How to Cite

Miller, H. G., & Pittman, D. A. (1982). Geophysical constraints on the thickness of the Holyrood Pluton, Avalon Peninsula, Newfoundland. Atlantic Geoscience, 18(2). https://doi.org/10.4138/1390

Issue

Vol. 18 No. 2 (1982)

Section

Notes

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