A new mechanism of granite emplacement; intrusion in active extensional shear zones

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doi: 10.1038/343452a0
Authors:Hutton, D. H. W.; Dempster, T. J.; Brown, P. E.; Becker, S. D.
Author Affiliations:Primary:
Durham Univ., Dep. Geol. Sci., Durham, United Kingdom
Scott. Univ. Res. and React. Cent., United Kingdom
Aberdeen Univ., United Kingdom
Leicester Univ., United Kingdom
Volume Title:Nature (London)
Source:Nature (London), 343(6257), p.452-455. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836
Publication Date:1990
Note:In English. 18 refs.; illus. incl. geol. sketch maps
Summary:Research on the voluminous rapakivi granite suite of S Greenland is summarized and a new igneous intrusion mechanism proposed. The granite was intruded as large-scale sheets along ductile extensional shear zones active during its emplacement. It is concluded that the space problem of granite emplacement may be solved, at least in Greenland. Space created during horizontal extension across a steeply inclined ramp linked to a gently inclined flat, seems to account for the volume of the intruding granite magma. [R.K.H.]
Subjects:Continental crust; Crust; Deformation; Ductile deformation; Effects; Emplacement; Extension; Extension tectonics; Faults; Granites; Igneous rocks; Intrusions; Magmas; Mechanism; Petrology; Plutonic rocks; Plutons; Precambrian; Proterozoic; Rapakivi; Shear zones; Syntectonic processes; Tectonics; Upper Precambrian; Arctic region; Greenland; South Greenland; Qernertoq Island
Coordinates:N590000 N600000 W0430000 W0440000
Abstract Numbers:90M/4684
Record ID:1990020222
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom
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